./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix012_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.2024-05-21_14-57-05.files/protection/mix012_pso.opt_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 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/mix012_pso.opt_tso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix012_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-76401ed-m [2024-06-20 15:52:39,820 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 15:52:39,886 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 15:52:39,891 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 15:52:39,891 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 15:52:39,912 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 15:52:39,912 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 15:52:39,912 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 15:52:39,913 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 15:52:39,916 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 15:52:39,916 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 15:52:39,916 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 15:52:39,917 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 15:52:39,918 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 15:52:39,918 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 15:52:39,918 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 15:52:39,919 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 15:52:39,919 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 15:52:39,919 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 15:52:39,919 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 15:52:39,919 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 15:52:39,920 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 15:52:39,920 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 15:52:39,920 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 15:52:39,920 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 15:52:39,920 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 15:52:39,921 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 15:52:39,921 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 15:52:39,921 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 15:52:39,922 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 15:52:39,922 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 15:52:39,922 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 15:52:39,923 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:52:39,923 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 15:52:39,923 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 15:52:39,923 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 15:52:39,923 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 15:52:39,924 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 15:52:39,924 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 15:52:39,924 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 15:52:39,924 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 15:52:39,924 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 15:52:39,924 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 15:52:39,925 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 15:52:40,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 15:52:40,150 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 15:52:40,152 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 15:52:40,153 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 15:52:40,153 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 15:52:40,154 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix012_pso.opt_tso.opt.i [2024-06-20 15:52:41,086 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 15:52:41,318 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 15:52:41,318 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix012_pso.opt_tso.opt.i [2024-06-20 15:52:41,328 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7fae6f4c/73c8e3714e1c477dabff17a627aabb28/FLAG67312f22f [2024-06-20 15:52:41,338 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7fae6f4c/73c8e3714e1c477dabff17a627aabb28 [2024-06-20 15:52:41,340 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 15:52:41,340 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 15:52:41,340 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix012_pso.opt_tso.opt.yml/witness.yml [2024-06-20 15:52:41,430 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 15:52:41,431 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 15:52:41,432 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 15:52:41,432 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 15:52:41,437 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 15:52:41,438 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:52:41" (1/2) ... [2024-06-20 15:52:41,438 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6218fb88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:52:41, skipping insertion in model container [2024-06-20 15:52:41,439 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:52:41" (1/2) ... [2024-06-20 15:52:41,440 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@40c5027 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:52:41, skipping insertion in model container [2024-06-20 15:52:41,441 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:52:41" (2/2) ... [2024-06-20 15:52:41,441 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6218fb88 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:52:41, skipping insertion in model container [2024-06-20 15:52:41,441 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:52:41" (2/2) ... [2024-06-20 15:52:41,441 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 15:52:41,506 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 15:52:41,507 INFO L97 edCorrectnessWitness]: Location invariant before [L824-L824] (((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-20 15:52:41,508 INFO L97 edCorrectnessWitness]: Location invariant before [L825-L825] (((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-20 15:52:41,508 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 15:52:41,508 INFO L106 edCorrectnessWitness]: ghost_update [L822-L822] multithreaded = 1; [2024-06-20 15:52:41,538 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 15:52:41,834 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:52:41,841 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 15:52:41,953 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:52:41,978 INFO L206 MainTranslator]: Completed translation [2024-06-20 15:52:41,978 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:52:41 WrapperNode [2024-06-20 15:52:41,978 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 15:52:41,979 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 15:52:41,979 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 15:52:41,979 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 15:52:41,984 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 20.06 03:52:41" (1/1) ... [2024-06-20 15:52:41,995 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 20.06 03:52:41" (1/1) ... [2024-06-20 15:52:42,016 INFO L138 Inliner]: procedures = 174, calls = 36, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 136 [2024-06-20 15:52:42,017 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 15:52:42,017 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 15:52:42,017 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 15:52:42,017 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 15:52:42,025 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:52:41" (1/1) ... [2024-06-20 15:52:42,026 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:52:41" (1/1) ... [2024-06-20 15:52:42,028 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:52:41" (1/1) ... [2024-06-20 15:52:42,067 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]. [2024-06-20 15:52:42,068 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:52:41" (1/1) ... [2024-06-20 15:52:42,068 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:52:41" (1/1) ... [2024-06-20 15:52:42,088 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:52:41" (1/1) ... [2024-06-20 15:52:42,090 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:52:41" (1/1) ... [2024-06-20 15:52:42,091 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:52:41" (1/1) ... [2024-06-20 15:52:42,120 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:52:41" (1/1) ... [2024-06-20 15:52:42,123 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 15:52:42,123 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 15:52:42,123 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 15:52:42,123 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 15:52:42,124 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:52:41" (1/1) ... [2024-06-20 15:52:42,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:52:42,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 15:52:42,148 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) [2024-06-20 15:52:42,165 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 [2024-06-20 15:52:42,180 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 15:52:42,180 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 15:52:42,181 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 15:52:42,181 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 15:52:42,181 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 15:52:42,181 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 15:52:42,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 15:52:42,182 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 15:52:42,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 15:52:42,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 15:52:42,183 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 15:52:42,313 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 15:52:42,314 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 15:52:42,626 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 15:52:42,627 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 15:52:42,771 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 15:52:42,771 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 15:52:42,774 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:52:42 BoogieIcfgContainer [2024-06-20 15:52:42,775 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 15:52:42,777 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 15:52:42,777 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 15:52:42,779 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 15:52:42,779 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 03:52:41" (1/4) ... [2024-06-20 15:52:42,780 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d9c27a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 03:52:42, skipping insertion in model container [2024-06-20 15:52:42,780 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:52:41" (2/4) ... [2024-06-20 15:52:42,781 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d9c27a0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 03:52:42, skipping insertion in model container [2024-06-20 15:52:42,781 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:52:41" (3/4) ... [2024-06-20 15:52:42,784 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d9c27a0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 03:52:42, skipping insertion in model container [2024-06-20 15:52:42,785 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:52:42" (4/4) ... [2024-06-20 15:52:42,786 INFO L112 eAbstractionObserver]: Analyzing ICFG mix012_pso.opt_tso.opt.i [2024-06-20 15:52:42,798 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 15:52:42,798 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-20 15:52:42,798 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 15:52:42,856 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 15:52:42,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 30 transitions, 68 flow [2024-06-20 15:52:42,919 INFO L124 PetriNetUnfolderBase]: 0/28 cut-off events. [2024-06-20 15:52:42,919 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:52:42,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 28 events. 0/28 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 40 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 15:52:42,921 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 30 transitions, 68 flow [2024-06-20 15:52:42,924 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 22 transitions, 50 flow [2024-06-20 15:52:42,936 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 15:52:42,942 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;@4ce7c39a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 15:52:42,942 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-20 15:52:42,945 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 15:52:42,945 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 15:52:42,945 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:52:42,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:42,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 15:52:42,946 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:42,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:42,950 INFO L85 PathProgramCache]: Analyzing trace with hash 353502766, now seen corresponding path program 1 times [2024-06-20 15:52:42,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:42,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604372782] [2024-06-20 15:52:42,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:42,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:43,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:43,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:43,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:43,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604372782] [2024-06-20 15:52:43,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604372782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:43,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:43,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 15:52:43,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576211134] [2024-06-20 15:52:43,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:43,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 15:52:43,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:43,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 15:52:43,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 15:52:43,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-20 15:52:43,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:43,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:43,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-20 15:52:43,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:43,969 INFO L124 PetriNetUnfolderBase]: 131/258 cut-off events. [2024-06-20 15:52:43,970 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-06-20 15:52:43,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 514 conditions, 258 events. 131/258 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 960 event pairs, 75 based on Foata normal form. 1/249 useless extension candidates. Maximal degree in co-relation 503. Up to 235 conditions per place. [2024-06-20 15:52:43,974 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 20 selfloop transitions, 3 changer transitions 0/28 dead transitions. [2024-06-20 15:52:43,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 28 transitions, 111 flow [2024-06-20 15:52:43,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 15:52:43,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 15:52:43,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2024-06-20 15:52:43,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-20 15:52:43,984 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 50 flow. Second operand 3 states and 55 transitions. [2024-06-20 15:52:43,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 28 transitions, 111 flow [2024-06-20 15:52:43,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 28 transitions, 108 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-20 15:52:43,988 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 69 flow [2024-06-20 15:52:43,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2024-06-20 15:52:43,991 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2024-06-20 15:52:43,992 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 69 flow [2024-06-20 15:52:43,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:43,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:43,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:43,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 15:52:43,993 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:43,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:43,994 INFO L85 PathProgramCache]: Analyzing trace with hash 414392929, now seen corresponding path program 1 times [2024-06-20 15:52:43,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:43,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256137026] [2024-06-20 15:52:43,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:43,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:44,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:44,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:44,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:44,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256137026] [2024-06-20 15:52:44,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256137026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:44,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:44,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 15:52:44,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293710524] [2024-06-20 15:52:44,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:44,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 15:52:44,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:44,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 15:52:44,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 15:52:44,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 30 [2024-06-20 15:52:44,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 69 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:44,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:44,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 30 [2024-06-20 15:52:44,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:44,659 INFO L124 PetriNetUnfolderBase]: 147/275 cut-off events. [2024-06-20 15:52:44,660 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2024-06-20 15:52:44,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 635 conditions, 275 events. 147/275 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 974 event pairs, 47 based on Foata normal form. 4/279 useless extension candidates. Maximal degree in co-relation 623. Up to 244 conditions per place. [2024-06-20 15:52:44,662 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 26 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2024-06-20 15:52:44,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 35 transitions, 159 flow [2024-06-20 15:52:44,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:52:44,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:52:44,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 69 transitions. [2024-06-20 15:52:44,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-20 15:52:44,663 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 69 flow. Second operand 4 states and 69 transitions. [2024-06-20 15:52:44,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 35 transitions, 159 flow [2024-06-20 15:52:44,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 35 transitions, 156 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 15:52:44,665 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 93 flow [2024-06-20 15:52:44,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=93, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2024-06-20 15:52:44,665 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 4 predicate places. [2024-06-20 15:52:44,666 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 93 flow [2024-06-20 15:52:44,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:44,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:44,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:44,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 15:52:44,666 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:44,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:44,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1444326028, now seen corresponding path program 1 times [2024-06-20 15:52:44,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:44,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414586099] [2024-06-20 15:52:44,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:44,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:45,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:45,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:45,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414586099] [2024-06-20 15:52:45,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414586099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:45,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:45,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:52:45,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504007501] [2024-06-20 15:52:45,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:45,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:52:45,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:45,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:52:45,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:52:45,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 30 [2024-06-20 15:52:45,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 93 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:45,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:45,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 30 [2024-06-20 15:52:45,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:45,705 INFO L124 PetriNetUnfolderBase]: 143/267 cut-off events. [2024-06-20 15:52:45,705 INFO L125 PetriNetUnfolderBase]: For 167/167 co-relation queries the response was YES. [2024-06-20 15:52:45,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685 conditions, 267 events. 143/267 cut-off events. For 167/167 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 928 event pairs, 25 based on Foata normal form. 4/271 useless extension candidates. Maximal degree in co-relation 671. Up to 218 conditions per place. [2024-06-20 15:52:45,707 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 29 selfloop transitions, 8 changer transitions 0/41 dead transitions. [2024-06-20 15:52:45,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 41 transitions, 204 flow [2024-06-20 15:52:45,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:52:45,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:52:45,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2024-06-20 15:52:45,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-06-20 15:52:45,709 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 93 flow. Second operand 6 states and 93 transitions. [2024-06-20 15:52:45,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 41 transitions, 204 flow [2024-06-20 15:52:45,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 41 transitions, 192 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-20 15:52:45,710 INFO L231 Difference]: Finished difference. Result has 37 places, 27 transitions, 109 flow [2024-06-20 15:52:45,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=109, PETRI_PLACES=37, PETRI_TRANSITIONS=27} [2024-06-20 15:52:45,711 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 8 predicate places. [2024-06-20 15:52:45,711 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 27 transitions, 109 flow [2024-06-20 15:52:45,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:45,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:45,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:45,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 15:52:45,712 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:45,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:45,712 INFO L85 PathProgramCache]: Analyzing trace with hash -402717698, now seen corresponding path program 1 times [2024-06-20 15:52:45,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:45,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910430243] [2024-06-20 15:52:45,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:45,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:45,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:46,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:46,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:46,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910430243] [2024-06-20 15:52:46,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910430243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:46,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:46,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:52:46,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557927905] [2024-06-20 15:52:46,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:46,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:52:46,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:46,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:52:46,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:52:46,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-06-20 15:52:46,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 27 transitions, 109 flow. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 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) [2024-06-20 15:52:46,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:46,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-06-20 15:52:46,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:46,358 INFO L124 PetriNetUnfolderBase]: 119/237 cut-off events. [2024-06-20 15:52:46,359 INFO L125 PetriNetUnfolderBase]: For 264/264 co-relation queries the response was YES. [2024-06-20 15:52:46,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 659 conditions, 237 events. 119/237 cut-off events. For 264/264 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 846 event pairs, 34 based on Foata normal form. 1/238 useless extension candidates. Maximal degree in co-relation 642. Up to 211 conditions per place. [2024-06-20 15:52:46,360 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 24 selfloop transitions, 6 changer transitions 0/34 dead transitions. [2024-06-20 15:52:46,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 34 transitions, 187 flow [2024-06-20 15:52:46,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:52:46,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:52:46,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 67 transitions. [2024-06-20 15:52:46,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44666666666666666 [2024-06-20 15:52:46,362 INFO L175 Difference]: Start difference. First operand has 37 places, 27 transitions, 109 flow. Second operand 5 states and 67 transitions. [2024-06-20 15:52:46,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 34 transitions, 187 flow [2024-06-20 15:52:46,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 34 transitions, 171 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-20 15:52:46,363 INFO L231 Difference]: Finished difference. Result has 39 places, 29 transitions, 120 flow [2024-06-20 15:52:46,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=120, PETRI_PLACES=39, PETRI_TRANSITIONS=29} [2024-06-20 15:52:46,364 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 10 predicate places. [2024-06-20 15:52:46,364 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 29 transitions, 120 flow [2024-06-20 15:52:46,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 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) [2024-06-20 15:52:46,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:46,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:46,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 15:52:46,365 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:46,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:46,365 INFO L85 PathProgramCache]: Analyzing trace with hash 420316266, now seen corresponding path program 1 times [2024-06-20 15:52:46,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:46,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375820548] [2024-06-20 15:52:46,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:46,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:46,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:47,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:47,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:47,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375820548] [2024-06-20 15:52:47,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375820548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:47,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:47,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:52:47,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665850369] [2024-06-20 15:52:47,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:47,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:52:47,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:47,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:52:47,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:52:47,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-06-20 15:52:47,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 29 transitions, 120 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:47,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:47,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-06-20 15:52:47,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:47,237 INFO L124 PetriNetUnfolderBase]: 117/234 cut-off events. [2024-06-20 15:52:47,237 INFO L125 PetriNetUnfolderBase]: For 332/332 co-relation queries the response was YES. [2024-06-20 15:52:47,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 689 conditions, 234 events. 117/234 cut-off events. For 332/332 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 830 event pairs, 33 based on Foata normal form. 1/235 useless extension candidates. Maximal degree in co-relation 670. Up to 205 conditions per place. [2024-06-20 15:52:47,238 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 25 selfloop transitions, 8 changer transitions 0/37 dead transitions. [2024-06-20 15:52:47,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 37 transitions, 208 flow [2024-06-20 15:52:47,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:52:47,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:52:47,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 78 transitions. [2024-06-20 15:52:47,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-20 15:52:47,240 INFO L175 Difference]: Start difference. First operand has 39 places, 29 transitions, 120 flow. Second operand 6 states and 78 transitions. [2024-06-20 15:52:47,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 37 transitions, 208 flow [2024-06-20 15:52:47,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 37 transitions, 197 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-20 15:52:47,242 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 142 flow [2024-06-20 15:52:47,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=142, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2024-06-20 15:52:47,243 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 13 predicate places. [2024-06-20 15:52:47,243 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 142 flow [2024-06-20 15:52:47,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:47,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:47,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:47,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 15:52:47,244 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:47,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:47,248 INFO L85 PathProgramCache]: Analyzing trace with hash 158987699, now seen corresponding path program 1 times [2024-06-20 15:52:47,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:47,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960533866] [2024-06-20 15:52:47,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:47,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:47,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:47,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:47,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960533866] [2024-06-20 15:52:47,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960533866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:47,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:47,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:52:47,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195064624] [2024-06-20 15:52:47,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:47,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:52:47,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:47,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:52:47,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:52:47,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:52:47,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 142 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:47,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:47,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:52:47,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:47,949 INFO L124 PetriNetUnfolderBase]: 143/270 cut-off events. [2024-06-20 15:52:47,949 INFO L125 PetriNetUnfolderBase]: For 533/533 co-relation queries the response was YES. [2024-06-20 15:52:47,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 864 conditions, 270 events. 143/270 cut-off events. For 533/533 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 942 event pairs, 39 based on Foata normal form. 2/272 useless extension candidates. Maximal degree in co-relation 844. Up to 240 conditions per place. [2024-06-20 15:52:47,951 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 32 selfloop transitions, 8 changer transitions 0/43 dead transitions. [2024-06-20 15:52:47,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 43 transitions, 256 flow [2024-06-20 15:52:47,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:52:47,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:52:47,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 77 transitions. [2024-06-20 15:52:47,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-20 15:52:47,952 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 142 flow. Second operand 6 states and 77 transitions. [2024-06-20 15:52:47,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 43 transitions, 256 flow [2024-06-20 15:52:47,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 43 transitions, 239 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-20 15:52:47,954 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 158 flow [2024-06-20 15:52:47,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=158, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2024-06-20 15:52:47,954 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 15 predicate places. [2024-06-20 15:52:47,955 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 158 flow [2024-06-20 15:52:47,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:47,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:47,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:47,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 15:52:47,955 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:47,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:47,956 INFO L85 PathProgramCache]: Analyzing trace with hash 144895409, now seen corresponding path program 2 times [2024-06-20 15:52:47,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:47,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629851550] [2024-06-20 15:52:47,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:47,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:47,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:48,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:48,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:48,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629851550] [2024-06-20 15:52:48,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629851550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:48,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:48,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:52:48,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115399795] [2024-06-20 15:52:48,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:48,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:52:48,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:48,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:52:48,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:52:48,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:52:48,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 158 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:48,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:48,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:52:48,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:48,621 INFO L124 PetriNetUnfolderBase]: 144/275 cut-off events. [2024-06-20 15:52:48,621 INFO L125 PetriNetUnfolderBase]: For 716/718 co-relation queries the response was YES. [2024-06-20 15:52:48,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 931 conditions, 275 events. 144/275 cut-off events. For 716/718 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 992 event pairs, 43 based on Foata normal form. 4/279 useless extension candidates. Maximal degree in co-relation 910. Up to 233 conditions per place. [2024-06-20 15:52:48,622 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 29 selfloop transitions, 11 changer transitions 0/43 dead transitions. [2024-06-20 15:52:48,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 43 transitions, 272 flow [2024-06-20 15:52:48,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:52:48,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:52:48,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 77 transitions. [2024-06-20 15:52:48,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-20 15:52:48,624 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 158 flow. Second operand 6 states and 77 transitions. [2024-06-20 15:52:48,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 43 transitions, 272 flow [2024-06-20 15:52:48,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 255 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-20 15:52:48,626 INFO L231 Difference]: Finished difference. Result has 46 places, 35 transitions, 184 flow [2024-06-20 15:52:48,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=184, PETRI_PLACES=46, PETRI_TRANSITIONS=35} [2024-06-20 15:52:48,626 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 17 predicate places. [2024-06-20 15:52:48,626 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 35 transitions, 184 flow [2024-06-20 15:52:48,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:48,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:48,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:48,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 15:52:48,627 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:48,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:48,628 INFO L85 PathProgramCache]: Analyzing trace with hash -737901277, now seen corresponding path program 1 times [2024-06-20 15:52:48,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:48,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918438329] [2024-06-20 15:52:48,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:48,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:48,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:49,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:49,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:49,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918438329] [2024-06-20 15:52:49,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918438329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:49,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:49,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:52:49,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923891782] [2024-06-20 15:52:49,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:49,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:52:49,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:49,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:52:49,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:52:49,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:52:49,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 35 transitions, 184 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:49,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:49,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:52:49,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:49,446 INFO L124 PetriNetUnfolderBase]: 159/305 cut-off events. [2024-06-20 15:52:49,447 INFO L125 PetriNetUnfolderBase]: For 935/935 co-relation queries the response was YES. [2024-06-20 15:52:49,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1099 conditions, 305 events. 159/305 cut-off events. For 935/935 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1154 event pairs, 39 based on Foata normal form. 1/306 useless extension candidates. Maximal degree in co-relation 1077. Up to 253 conditions per place. [2024-06-20 15:52:49,448 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 38 selfloop transitions, 15 changer transitions 0/56 dead transitions. [2024-06-20 15:52:49,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 56 transitions, 376 flow [2024-06-20 15:52:49,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:52:49,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:52:49,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 93 transitions. [2024-06-20 15:52:49,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-20 15:52:49,452 INFO L175 Difference]: Start difference. First operand has 46 places, 35 transitions, 184 flow. Second operand 7 states and 93 transitions. [2024-06-20 15:52:49,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 56 transitions, 376 flow [2024-06-20 15:52:49,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 56 transitions, 345 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-20 15:52:49,455 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 260 flow [2024-06-20 15:52:49,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=260, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-20 15:52:49,462 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 22 predicate places. [2024-06-20 15:52:49,462 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 260 flow [2024-06-20 15:52:49,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:49,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:49,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:49,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 15:52:49,463 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:49,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:49,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1695715493, now seen corresponding path program 2 times [2024-06-20 15:52:49,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:49,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616254016] [2024-06-20 15:52:49,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:49,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:49,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:50,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:50,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:50,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616254016] [2024-06-20 15:52:50,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616254016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:50,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:50,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:52:50,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700500881] [2024-06-20 15:52:50,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:50,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:52:50,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:50,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:52:50,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:52:50,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:52:50,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 260 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:50,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:50,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:52:50,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:50,343 INFO L124 PetriNetUnfolderBase]: 162/310 cut-off events. [2024-06-20 15:52:50,343 INFO L125 PetriNetUnfolderBase]: For 1266/1266 co-relation queries the response was YES. [2024-06-20 15:52:50,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1210 conditions, 310 events. 162/310 cut-off events. For 1266/1266 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1177 event pairs, 64 based on Foata normal form. 1/311 useless extension candidates. Maximal degree in co-relation 1186. Up to 264 conditions per place. [2024-06-20 15:52:50,345 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 40 selfloop transitions, 16 changer transitions 0/59 dead transitions. [2024-06-20 15:52:50,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 59 transitions, 450 flow [2024-06-20 15:52:50,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:52:50,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:52:50,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 96 transitions. [2024-06-20 15:52:50,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 15:52:50,346 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 260 flow. Second operand 8 states and 96 transitions. [2024-06-20 15:52:50,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 59 transitions, 450 flow [2024-06-20 15:52:50,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 59 transitions, 422 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-20 15:52:50,348 INFO L231 Difference]: Finished difference. Result has 60 places, 51 transitions, 351 flow [2024-06-20 15:52:50,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=351, PETRI_PLACES=60, PETRI_TRANSITIONS=51} [2024-06-20 15:52:50,349 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 31 predicate places. [2024-06-20 15:52:50,349 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 51 transitions, 351 flow [2024-06-20 15:52:50,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:50,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:50,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:50,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 15:52:50,350 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:50,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:50,350 INFO L85 PathProgramCache]: Analyzing trace with hash 663528367, now seen corresponding path program 3 times [2024-06-20 15:52:50,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:50,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823008407] [2024-06-20 15:52:50,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:50,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:50,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:50,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:50,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:50,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823008407] [2024-06-20 15:52:50,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823008407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:50,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:50,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:52:50,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345664186] [2024-06-20 15:52:50,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:50,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:52:50,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:50,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:52:50,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:52:51,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:52:51,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 51 transitions, 351 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:51,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:51,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:52:51,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:51,226 INFO L124 PetriNetUnfolderBase]: 160/307 cut-off events. [2024-06-20 15:52:51,227 INFO L125 PetriNetUnfolderBase]: For 1597/1597 co-relation queries the response was YES. [2024-06-20 15:52:51,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1268 conditions, 307 events. 160/307 cut-off events. For 1597/1597 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1163 event pairs, 55 based on Foata normal form. 1/308 useless extension candidates. Maximal degree in co-relation 1239. Up to 255 conditions per place. [2024-06-20 15:52:51,229 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 42 selfloop transitions, 20 changer transitions 0/65 dead transitions. [2024-06-20 15:52:51,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 65 transitions, 531 flow [2024-06-20 15:52:51,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:52:51,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:52:51,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 100 transitions. [2024-06-20 15:52:51,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 15:52:51,231 INFO L175 Difference]: Start difference. First operand has 60 places, 51 transitions, 351 flow. Second operand 8 states and 100 transitions. [2024-06-20 15:52:51,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 65 transitions, 531 flow [2024-06-20 15:52:51,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 65 transitions, 499 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-20 15:52:51,234 INFO L231 Difference]: Finished difference. Result has 66 places, 53 transitions, 392 flow [2024-06-20 15:52:51,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=392, PETRI_PLACES=66, PETRI_TRANSITIONS=53} [2024-06-20 15:52:51,235 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 37 predicate places. [2024-06-20 15:52:51,236 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 53 transitions, 392 flow [2024-06-20 15:52:51,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:51,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:51,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:51,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 15:52:51,237 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:51,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:51,238 INFO L85 PathProgramCache]: Analyzing trace with hash -686069391, now seen corresponding path program 1 times [2024-06-20 15:52:51,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:51,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428933618] [2024-06-20 15:52:51,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:51,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:51,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:51,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:51,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:51,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428933618] [2024-06-20 15:52:51,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428933618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:51,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:51,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:52:51,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593896471] [2024-06-20 15:52:51,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:51,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:52:51,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:51,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:52:51,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:52:51,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:52:51,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 53 transitions, 392 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:51,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:51,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:52:51,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:52,125 INFO L124 PetriNetUnfolderBase]: 172/329 cut-off events. [2024-06-20 15:52:52,125 INFO L125 PetriNetUnfolderBase]: For 2014/2014 co-relation queries the response was YES. [2024-06-20 15:52:52,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1384 conditions, 329 events. 172/329 cut-off events. For 2014/2014 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1276 event pairs, 59 based on Foata normal form. 2/331 useless extension candidates. Maximal degree in co-relation 1353. Up to 282 conditions per place. [2024-06-20 15:52:52,128 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 50 selfloop transitions, 16 changer transitions 0/69 dead transitions. [2024-06-20 15:52:52,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 69 transitions, 582 flow [2024-06-20 15:52:52,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:52:52,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:52:52,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 99 transitions. [2024-06-20 15:52:52,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-20 15:52:52,129 INFO L175 Difference]: Start difference. First operand has 66 places, 53 transitions, 392 flow. Second operand 8 states and 99 transitions. [2024-06-20 15:52:52,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 69 transitions, 582 flow [2024-06-20 15:52:52,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 69 transitions, 519 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 15:52:52,132 INFO L231 Difference]: Finished difference. Result has 69 places, 58 transitions, 408 flow [2024-06-20 15:52:52,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=408, PETRI_PLACES=69, PETRI_TRANSITIONS=58} [2024-06-20 15:52:52,133 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 40 predicate places. [2024-06-20 15:52:52,133 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 58 transitions, 408 flow [2024-06-20 15:52:52,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:52,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:52,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:52,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 15:52:52,134 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:52,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:52,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1525008227, now seen corresponding path program 2 times [2024-06-20 15:52:52,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:52,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663515393] [2024-06-20 15:52:52,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:52,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:52,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:52,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:52,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:52,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663515393] [2024-06-20 15:52:52,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663515393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:52,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:52,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:52:52,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348083616] [2024-06-20 15:52:52,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:52,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:52:52,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:52,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:52:52,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:52:52,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:52:52,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 58 transitions, 408 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:52,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:52,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:52:52,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:53,071 INFO L124 PetriNetUnfolderBase]: 178/339 cut-off events. [2024-06-20 15:52:53,072 INFO L125 PetriNetUnfolderBase]: For 2342/2342 co-relation queries the response was YES. [2024-06-20 15:52:53,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1487 conditions, 339 events. 178/339 cut-off events. For 2342/2342 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1314 event pairs, 59 based on Foata normal form. 2/341 useless extension candidates. Maximal degree in co-relation 1455. Up to 280 conditions per place. [2024-06-20 15:52:53,074 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 47 selfloop transitions, 20 changer transitions 0/70 dead transitions. [2024-06-20 15:52:53,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 70 transitions, 594 flow [2024-06-20 15:52:53,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:52:53,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:52:53,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 88 transitions. [2024-06-20 15:52:53,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-20 15:52:53,075 INFO L175 Difference]: Start difference. First operand has 69 places, 58 transitions, 408 flow. Second operand 7 states and 88 transitions. [2024-06-20 15:52:53,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 70 transitions, 594 flow [2024-06-20 15:52:53,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 551 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 15:52:53,078 INFO L231 Difference]: Finished difference. Result has 71 places, 61 transitions, 447 flow [2024-06-20 15:52:53,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=447, PETRI_PLACES=71, PETRI_TRANSITIONS=61} [2024-06-20 15:52:53,079 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 42 predicate places. [2024-06-20 15:52:53,079 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 61 transitions, 447 flow [2024-06-20 15:52:53,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:53,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:53,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:53,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 15:52:53,080 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:53,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:53,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1195668569, now seen corresponding path program 3 times [2024-06-20 15:52:53,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:53,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917593197] [2024-06-20 15:52:53,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:53,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:53,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:53,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:53,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:53,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917593197] [2024-06-20 15:52:53,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917593197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:53,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:53,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:52:53,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048132793] [2024-06-20 15:52:53,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:53,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:52:53,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:53,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:52:53,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:52:53,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:52:53,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 61 transitions, 447 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:53,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:53,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:52:53,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:54,075 INFO L124 PetriNetUnfolderBase]: 186/352 cut-off events. [2024-06-20 15:52:54,075 INFO L125 PetriNetUnfolderBase]: For 2789/2789 co-relation queries the response was YES. [2024-06-20 15:52:54,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1661 conditions, 352 events. 186/352 cut-off events. For 2789/2789 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1382 event pairs, 62 based on Foata normal form. 1/353 useless extension candidates. Maximal degree in co-relation 1628. Up to 270 conditions per place. [2024-06-20 15:52:54,078 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 45 selfloop transitions, 27 changer transitions 0/75 dead transitions. [2024-06-20 15:52:54,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 75 transitions, 689 flow [2024-06-20 15:52:54,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:52:54,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:52:54,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2024-06-20 15:52:54,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-20 15:52:54,079 INFO L175 Difference]: Start difference. First operand has 71 places, 61 transitions, 447 flow. Second operand 7 states and 89 transitions. [2024-06-20 15:52:54,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 75 transitions, 689 flow [2024-06-20 15:52:54,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 75 transitions, 621 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-20 15:52:54,084 INFO L231 Difference]: Finished difference. Result has 74 places, 67 transitions, 516 flow [2024-06-20 15:52:54,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=516, PETRI_PLACES=74, PETRI_TRANSITIONS=67} [2024-06-20 15:52:54,085 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 45 predicate places. [2024-06-20 15:52:54,085 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 67 transitions, 516 flow [2024-06-20 15:52:54,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:54,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:54,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:54,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 15:52:54,086 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:54,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:54,086 INFO L85 PathProgramCache]: Analyzing trace with hash 196791339, now seen corresponding path program 4 times [2024-06-20 15:52:54,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:54,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026768130] [2024-06-20 15:52:54,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:54,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:54,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:54,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:54,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:54,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026768130] [2024-06-20 15:52:54,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026768130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:54,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:54,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:52:54,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270765776] [2024-06-20 15:52:54,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:54,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:52:54,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:54,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:52:54,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:52:54,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:52:54,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 67 transitions, 516 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:54,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:54,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:52:54,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:55,074 INFO L124 PetriNetUnfolderBase]: 182/346 cut-off events. [2024-06-20 15:52:55,074 INFO L125 PetriNetUnfolderBase]: For 2774/2774 co-relation queries the response was YES. [2024-06-20 15:52:55,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1663 conditions, 346 events. 182/346 cut-off events. For 2774/2774 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1359 event pairs, 62 based on Foata normal form. 2/348 useless extension candidates. Maximal degree in co-relation 1628. Up to 284 conditions per place. [2024-06-20 15:52:55,077 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 54 selfloop transitions, 19 changer transitions 0/76 dead transitions. [2024-06-20 15:52:55,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 76 transitions, 703 flow [2024-06-20 15:52:55,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:52:55,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:52:55,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 88 transitions. [2024-06-20 15:52:55,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-20 15:52:55,078 INFO L175 Difference]: Start difference. First operand has 74 places, 67 transitions, 516 flow. Second operand 7 states and 88 transitions. [2024-06-20 15:52:55,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 76 transitions, 703 flow [2024-06-20 15:52:55,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 76 transitions, 664 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-20 15:52:55,082 INFO L231 Difference]: Finished difference. Result has 78 places, 68 transitions, 530 flow [2024-06-20 15:52:55,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=530, PETRI_PLACES=78, PETRI_TRANSITIONS=68} [2024-06-20 15:52:55,082 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 49 predicate places. [2024-06-20 15:52:55,083 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 68 transitions, 530 flow [2024-06-20 15:52:55,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:55,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:55,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:55,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 15:52:55,083 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:55,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:55,084 INFO L85 PathProgramCache]: Analyzing trace with hash 197037417, now seen corresponding path program 1 times [2024-06-20 15:52:55,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:55,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570171032] [2024-06-20 15:52:55,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:55,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:55,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:55,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:55,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:55,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570171032] [2024-06-20 15:52:55,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570171032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:55,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:55,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:52:55,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711759747] [2024-06-20 15:52:55,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:55,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:52:55,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:55,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:52:55,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:52:55,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:52:55,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 68 transitions, 530 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:52:55,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:55,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:52:55,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:56,172 INFO L124 PetriNetUnfolderBase]: 180/342 cut-off events. [2024-06-20 15:52:56,173 INFO L125 PetriNetUnfolderBase]: For 2924/2924 co-relation queries the response was YES. [2024-06-20 15:52:56,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1694 conditions, 342 events. 180/342 cut-off events. For 2924/2924 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1329 event pairs, 69 based on Foata normal form. 1/343 useless extension candidates. Maximal degree in co-relation 1657. Up to 307 conditions per place. [2024-06-20 15:52:56,175 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 61 selfloop transitions, 13 changer transitions 0/77 dead transitions. [2024-06-20 15:52:56,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 77 transitions, 704 flow [2024-06-20 15:52:56,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:52:56,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:52:56,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 93 transitions. [2024-06-20 15:52:56,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-20 15:52:56,176 INFO L175 Difference]: Start difference. First operand has 78 places, 68 transitions, 530 flow. Second operand 8 states and 93 transitions. [2024-06-20 15:52:56,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 77 transitions, 704 flow [2024-06-20 15:52:56,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 77 transitions, 664 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 15:52:56,180 INFO L231 Difference]: Finished difference. Result has 81 places, 70 transitions, 535 flow [2024-06-20 15:52:56,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=535, PETRI_PLACES=81, PETRI_TRANSITIONS=70} [2024-06-20 15:52:56,182 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 52 predicate places. [2024-06-20 15:52:56,182 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 70 transitions, 535 flow [2024-06-20 15:52:56,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:52:56,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:56,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:56,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 15:52:56,182 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:56,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:56,183 INFO L85 PathProgramCache]: Analyzing trace with hash 697607483, now seen corresponding path program 1 times [2024-06-20 15:52:56,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:56,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689285437] [2024-06-20 15:52:56,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:56,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:56,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:57,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:57,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:57,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689285437] [2024-06-20 15:52:57,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689285437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:57,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:57,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:52:57,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794583268] [2024-06-20 15:52:57,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:57,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:52:57,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:57,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:52:57,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:52:57,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:52:57,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 70 transitions, 535 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:52:57,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:57,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:52:57,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:57,336 INFO L124 PetriNetUnfolderBase]: 183/349 cut-off events. [2024-06-20 15:52:57,336 INFO L125 PetriNetUnfolderBase]: For 3187/3187 co-relation queries the response was YES. [2024-06-20 15:52:57,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1747 conditions, 349 events. 183/349 cut-off events. For 3187/3187 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1352 event pairs, 37 based on Foata normal form. 1/350 useless extension candidates. Maximal degree in co-relation 1709. Up to 274 conditions per place. [2024-06-20 15:52:57,339 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 53 selfloop transitions, 27 changer transitions 0/83 dead transitions. [2024-06-20 15:52:57,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 83 transitions, 755 flow [2024-06-20 15:52:57,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:52:57,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:52:57,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 101 transitions. [2024-06-20 15:52:57,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2024-06-20 15:52:57,341 INFO L175 Difference]: Start difference. First operand has 81 places, 70 transitions, 535 flow. Second operand 8 states and 101 transitions. [2024-06-20 15:52:57,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 83 transitions, 755 flow [2024-06-20 15:52:57,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 83 transitions, 707 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 15:52:57,345 INFO L231 Difference]: Finished difference. Result has 83 places, 72 transitions, 579 flow [2024-06-20 15:52:57,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=579, PETRI_PLACES=83, PETRI_TRANSITIONS=72} [2024-06-20 15:52:57,346 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 54 predicate places. [2024-06-20 15:52:57,346 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 72 transitions, 579 flow [2024-06-20 15:52:57,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:52:57,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:57,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:57,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 15:52:57,348 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:57,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:57,348 INFO L85 PathProgramCache]: Analyzing trace with hash 206686346, now seen corresponding path program 1 times [2024-06-20 15:52:57,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:57,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589341612] [2024-06-20 15:52:57,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:57,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:57,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:58,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:58,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:58,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589341612] [2024-06-20 15:52:58,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589341612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:58,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:58,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:52:58,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694552455] [2024-06-20 15:52:58,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:58,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:52:58,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:58,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:52:58,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:52:58,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:52:58,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 72 transitions, 579 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:52:58,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:58,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:52:58,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:58,257 INFO L124 PetriNetUnfolderBase]: 195/370 cut-off events. [2024-06-20 15:52:58,257 INFO L125 PetriNetUnfolderBase]: For 4088/4088 co-relation queries the response was YES. [2024-06-20 15:52:58,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1919 conditions, 370 events. 195/370 cut-off events. For 4088/4088 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1468 event pairs, 56 based on Foata normal form. 4/374 useless extension candidates. Maximal degree in co-relation 1880. Up to 309 conditions per place. [2024-06-20 15:52:58,260 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 66 selfloop transitions, 19 changer transitions 0/88 dead transitions. [2024-06-20 15:52:58,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 88 transitions, 825 flow [2024-06-20 15:52:58,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:52:58,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:52:58,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-06-20 15:52:58,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2024-06-20 15:52:58,261 INFO L175 Difference]: Start difference. First operand has 83 places, 72 transitions, 579 flow. Second operand 9 states and 111 transitions. [2024-06-20 15:52:58,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 88 transitions, 825 flow [2024-06-20 15:52:58,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 88 transitions, 767 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 15:52:58,266 INFO L231 Difference]: Finished difference. Result has 86 places, 75 transitions, 605 flow [2024-06-20 15:52:58,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=605, PETRI_PLACES=86, PETRI_TRANSITIONS=75} [2024-06-20 15:52:58,267 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 57 predicate places. [2024-06-20 15:52:58,267 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 75 transitions, 605 flow [2024-06-20 15:52:58,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:52:58,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:58,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:58,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 15:52:58,267 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:58,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:58,268 INFO L85 PathProgramCache]: Analyzing trace with hash 816209989, now seen corresponding path program 2 times [2024-06-20 15:52:58,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:58,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839343729] [2024-06-20 15:52:58,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:58,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:58,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:59,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:59,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:59,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839343729] [2024-06-20 15:52:59,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839343729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:59,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:59,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:52:59,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571278455] [2024-06-20 15:52:59,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:59,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:52:59,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:59,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:52:59,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:52:59,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:52:59,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 75 transitions, 605 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:52:59,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:59,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:52:59,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:59,653 INFO L124 PetriNetUnfolderBase]: 198/375 cut-off events. [2024-06-20 15:52:59,654 INFO L125 PetriNetUnfolderBase]: For 4249/4249 co-relation queries the response was YES. [2024-06-20 15:52:59,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2022 conditions, 375 events. 198/375 cut-off events. For 4249/4249 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1491 event pairs, 56 based on Foata normal form. 1/376 useless extension candidates. Maximal degree in co-relation 1982. Up to 323 conditions per place. [2024-06-20 15:52:59,656 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 68 selfloop transitions, 18 changer transitions 0/89 dead transitions. [2024-06-20 15:52:59,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 89 transitions, 847 flow [2024-06-20 15:52:59,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:52:59,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:52:59,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-06-20 15:52:59,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40370370370370373 [2024-06-20 15:52:59,658 INFO L175 Difference]: Start difference. First operand has 86 places, 75 transitions, 605 flow. Second operand 9 states and 109 transitions. [2024-06-20 15:52:59,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 89 transitions, 847 flow [2024-06-20 15:52:59,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 89 transitions, 785 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-20 15:52:59,663 INFO L231 Difference]: Finished difference. Result has 88 places, 77 transitions, 618 flow [2024-06-20 15:52:59,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=618, PETRI_PLACES=88, PETRI_TRANSITIONS=77} [2024-06-20 15:52:59,664 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 59 predicate places. [2024-06-20 15:52:59,664 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 77 transitions, 618 flow [2024-06-20 15:52:59,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:52:59,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:59,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:59,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 15:52:59,665 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:59,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:59,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1031146695, now seen corresponding path program 3 times [2024-06-20 15:52:59,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:59,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911188734] [2024-06-20 15:52:59,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:59,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:59,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:00,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:00,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:00,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911188734] [2024-06-20 15:53:00,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911188734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:00,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:00,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:53:00,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146404362] [2024-06-20 15:53:00,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:00,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:53:00,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:00,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:53:00,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:53:00,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:00,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 77 transitions, 618 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:53:00,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:00,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:00,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:00,689 INFO L124 PetriNetUnfolderBase]: 201/382 cut-off events. [2024-06-20 15:53:00,689 INFO L125 PetriNetUnfolderBase]: For 4771/4771 co-relation queries the response was YES. [2024-06-20 15:53:00,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2056 conditions, 382 events. 201/382 cut-off events. For 4771/4771 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1542 event pairs, 50 based on Foata normal form. 1/383 useless extension candidates. Maximal degree in co-relation 2015. Up to 310 conditions per place. [2024-06-20 15:53:00,692 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 60 selfloop transitions, 27 changer transitions 0/90 dead transitions. [2024-06-20 15:53:00,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 90 transitions, 854 flow [2024-06-20 15:53:00,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:53:00,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:53:00,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 99 transitions. [2024-06-20 15:53:00,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-20 15:53:00,693 INFO L175 Difference]: Start difference. First operand has 88 places, 77 transitions, 618 flow. Second operand 8 states and 99 transitions. [2024-06-20 15:53:00,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 90 transitions, 854 flow [2024-06-20 15:53:00,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 90 transitions, 795 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-20 15:53:00,699 INFO L231 Difference]: Finished difference. Result has 89 places, 79 transitions, 660 flow [2024-06-20 15:53:00,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=559, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=660, PETRI_PLACES=89, PETRI_TRANSITIONS=79} [2024-06-20 15:53:00,700 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 60 predicate places. [2024-06-20 15:53:00,700 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 79 transitions, 660 flow [2024-06-20 15:53:00,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:53:00,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:00,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:00,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 15:53:00,700 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:00,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:00,701 INFO L85 PathProgramCache]: Analyzing trace with hash 846525225, now seen corresponding path program 4 times [2024-06-20 15:53:00,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:00,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834100266] [2024-06-20 15:53:00,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:00,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:00,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:01,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:01,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:01,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834100266] [2024-06-20 15:53:01,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834100266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:01,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:01,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:53:01,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136897424] [2024-06-20 15:53:01,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:01,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:53:01,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:01,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:53:01,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:53:01,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:01,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 79 transitions, 660 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:53:01,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:01,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:01,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:01,929 INFO L124 PetriNetUnfolderBase]: 204/389 cut-off events. [2024-06-20 15:53:01,929 INFO L125 PetriNetUnfolderBase]: For 5322/5322 co-relation queries the response was YES. [2024-06-20 15:53:01,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2152 conditions, 389 events. 204/389 cut-off events. For 5322/5322 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1581 event pairs, 56 based on Foata normal form. 1/390 useless extension candidates. Maximal degree in co-relation 2110. Up to 318 conditions per place. [2024-06-20 15:53:01,932 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 64 selfloop transitions, 24 changer transitions 0/91 dead transitions. [2024-06-20 15:53:01,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 91 transitions, 908 flow [2024-06-20 15:53:01,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:53:01,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:53:01,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 98 transitions. [2024-06-20 15:53:01,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-20 15:53:01,933 INFO L175 Difference]: Start difference. First operand has 89 places, 79 transitions, 660 flow. Second operand 8 states and 98 transitions. [2024-06-20 15:53:01,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 91 transitions, 908 flow [2024-06-20 15:53:01,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 91 transitions, 827 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-20 15:53:01,940 INFO L231 Difference]: Finished difference. Result has 91 places, 81 transitions, 677 flow [2024-06-20 15:53:01,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=677, PETRI_PLACES=91, PETRI_TRANSITIONS=81} [2024-06-20 15:53:01,940 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 62 predicate places. [2024-06-20 15:53:01,940 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 81 transitions, 677 flow [2024-06-20 15:53:01,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:53:01,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:01,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:01,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 15:53:01,941 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:01,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:01,941 INFO L85 PathProgramCache]: Analyzing trace with hash 846525442, now seen corresponding path program 2 times [2024-06-20 15:53:01,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:01,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529323449] [2024-06-20 15:53:01,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:01,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:01,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:02,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:02,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:02,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529323449] [2024-06-20 15:53:02,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529323449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:02,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:02,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:53:02,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701573029] [2024-06-20 15:53:02,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:02,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:53:02,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:02,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:53:02,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:53:02,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:02,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 81 transitions, 677 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:53:02,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:02,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:02,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:02,939 INFO L124 PetriNetUnfolderBase]: 210/399 cut-off events. [2024-06-20 15:53:02,939 INFO L125 PetriNetUnfolderBase]: For 5958/5958 co-relation queries the response was YES. [2024-06-20 15:53:02,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2239 conditions, 399 events. 210/399 cut-off events. For 5958/5958 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1618 event pairs, 55 based on Foata normal form. 2/401 useless extension candidates. Maximal degree in co-relation 2196. Up to 322 conditions per place. [2024-06-20 15:53:02,942 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 68 selfloop transitions, 25 changer transitions 0/96 dead transitions. [2024-06-20 15:53:02,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 96 transitions, 949 flow [2024-06-20 15:53:02,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:53:02,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:53:02,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 99 transitions. [2024-06-20 15:53:02,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-20 15:53:02,943 INFO L175 Difference]: Start difference. First operand has 91 places, 81 transitions, 677 flow. Second operand 8 states and 99 transitions. [2024-06-20 15:53:02,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 96 transitions, 949 flow [2024-06-20 15:53:02,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 96 transitions, 869 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-20 15:53:02,952 INFO L231 Difference]: Finished difference. Result has 93 places, 86 transitions, 718 flow [2024-06-20 15:53:02,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=599, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=718, PETRI_PLACES=93, PETRI_TRANSITIONS=86} [2024-06-20 15:53:02,952 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 64 predicate places. [2024-06-20 15:53:02,952 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 86 transitions, 718 flow [2024-06-20 15:53:02,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:53:02,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:02,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:02,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 15:53:02,953 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:02,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:02,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1805565200, now seen corresponding path program 3 times [2024-06-20 15:53:02,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:02,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524046705] [2024-06-20 15:53:02,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:02,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:02,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:03,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:03,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:03,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524046705] [2024-06-20 15:53:03,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524046705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:03,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:03,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:53:03,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654577174] [2024-06-20 15:53:03,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:03,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:53:03,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:03,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:53:03,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:53:03,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:03,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 86 transitions, 718 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:53:03,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:03,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:03,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:03,947 INFO L124 PetriNetUnfolderBase]: 216/409 cut-off events. [2024-06-20 15:53:03,947 INFO L125 PetriNetUnfolderBase]: For 5955/5955 co-relation queries the response was YES. [2024-06-20 15:53:03,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2327 conditions, 409 events. 216/409 cut-off events. For 5955/5955 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1673 event pairs, 58 based on Foata normal form. 2/411 useless extension candidates. Maximal degree in co-relation 2283. Up to 335 conditions per place. [2024-06-20 15:53:03,950 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 73 selfloop transitions, 22 changer transitions 0/98 dead transitions. [2024-06-20 15:53:03,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 98 transitions, 1000 flow [2024-06-20 15:53:03,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:53:03,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:53:03,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 99 transitions. [2024-06-20 15:53:03,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-20 15:53:03,951 INFO L175 Difference]: Start difference. First operand has 93 places, 86 transitions, 718 flow. Second operand 8 states and 99 transitions. [2024-06-20 15:53:03,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 98 transitions, 1000 flow [2024-06-20 15:53:03,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 98 transitions, 925 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-20 15:53:03,958 INFO L231 Difference]: Finished difference. Result has 95 places, 89 transitions, 747 flow [2024-06-20 15:53:03,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=747, PETRI_PLACES=95, PETRI_TRANSITIONS=89} [2024-06-20 15:53:03,958 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 66 predicate places. [2024-06-20 15:53:03,958 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 89 transitions, 747 flow [2024-06-20 15:53:03,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:53:03,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:03,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:03,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 15:53:03,959 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:03,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:03,959 INFO L85 PathProgramCache]: Analyzing trace with hash 168687779, now seen corresponding path program 5 times [2024-06-20 15:53:03,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:03,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579595226] [2024-06-20 15:53:03,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:03,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:03,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:05,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:05,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:05,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579595226] [2024-06-20 15:53:05,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579595226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:05,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:05,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:53:05,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182727661] [2024-06-20 15:53:05,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:05,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:53:05,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:05,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:53:05,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:53:05,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:05,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 89 transitions, 747 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:53:05,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:05,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:05,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:05,470 INFO L124 PetriNetUnfolderBase]: 219/416 cut-off events. [2024-06-20 15:53:05,470 INFO L125 PetriNetUnfolderBase]: For 6493/6493 co-relation queries the response was YES. [2024-06-20 15:53:05,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2413 conditions, 416 events. 219/416 cut-off events. For 6493/6493 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1710 event pairs, 58 based on Foata normal form. 1/417 useless extension candidates. Maximal degree in co-relation 2368. Up to 343 conditions per place. [2024-06-20 15:53:05,473 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 76 selfloop transitions, 21 changer transitions 0/100 dead transitions. [2024-06-20 15:53:05,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 100 transitions, 1031 flow [2024-06-20 15:53:05,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:53:05,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:53:05,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 98 transitions. [2024-06-20 15:53:05,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-20 15:53:05,474 INFO L175 Difference]: Start difference. First operand has 95 places, 89 transitions, 747 flow. Second operand 8 states and 98 transitions. [2024-06-20 15:53:05,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 100 transitions, 1031 flow [2024-06-20 15:53:05,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 100 transitions, 949 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-20 15:53:05,482 INFO L231 Difference]: Finished difference. Result has 97 places, 91 transitions, 758 flow [2024-06-20 15:53:05,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=665, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=758, PETRI_PLACES=97, PETRI_TRANSITIONS=91} [2024-06-20 15:53:05,482 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 68 predicate places. [2024-06-20 15:53:05,482 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 91 transitions, 758 flow [2024-06-20 15:53:05,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:53:05,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:05,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:05,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 15:53:05,483 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:05,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:05,483 INFO L85 PathProgramCache]: Analyzing trace with hash 176306556, now seen corresponding path program 4 times [2024-06-20 15:53:05,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:05,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973509200] [2024-06-20 15:53:05,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:05,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:05,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:06,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:06,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:06,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973509200] [2024-06-20 15:53:06,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973509200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:06,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:06,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:53:06,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227994275] [2024-06-20 15:53:06,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:06,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:53:06,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:06,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:53:06,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:53:06,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:06,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 91 transitions, 758 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:53:06,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:06,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:06,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:06,575 INFO L124 PetriNetUnfolderBase]: 225/425 cut-off events. [2024-06-20 15:53:06,575 INFO L125 PetriNetUnfolderBase]: For 7186/7186 co-relation queries the response was YES. [2024-06-20 15:53:06,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2476 conditions, 425 events. 225/425 cut-off events. For 7186/7186 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1755 event pairs, 69 based on Foata normal form. 2/427 useless extension candidates. Maximal degree in co-relation 2430. Up to 374 conditions per place. [2024-06-20 15:53:06,578 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 84 selfloop transitions, 14 changer transitions 0/101 dead transitions. [2024-06-20 15:53:06,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 101 transitions, 1000 flow [2024-06-20 15:53:06,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:53:06,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:53:06,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 95 transitions. [2024-06-20 15:53:06,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-20 15:53:06,581 INFO L175 Difference]: Start difference. First operand has 97 places, 91 transitions, 758 flow. Second operand 8 states and 95 transitions. [2024-06-20 15:53:06,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 101 transitions, 1000 flow [2024-06-20 15:53:06,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 101 transitions, 923 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-20 15:53:06,590 INFO L231 Difference]: Finished difference. Result has 99 places, 93 transitions, 741 flow [2024-06-20 15:53:06,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=681, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=741, PETRI_PLACES=99, PETRI_TRANSITIONS=93} [2024-06-20 15:53:06,591 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 70 predicate places. [2024-06-20 15:53:06,591 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 93 transitions, 741 flow [2024-06-20 15:53:06,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:53:06,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:06,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:06,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 15:53:06,592 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:06,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:06,592 INFO L85 PathProgramCache]: Analyzing trace with hash 176039429, now seen corresponding path program 6 times [2024-06-20 15:53:06,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:06,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957638322] [2024-06-20 15:53:06,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:06,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:06,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:07,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:07,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:07,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957638322] [2024-06-20 15:53:07,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957638322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:07,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:07,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:53:07,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172595058] [2024-06-20 15:53:07,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:07,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:53:07,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:07,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:53:07,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:53:07,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:07,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 93 transitions, 741 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:53:07,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:07,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:07,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:07,993 INFO L124 PetriNetUnfolderBase]: 223/423 cut-off events. [2024-06-20 15:53:07,994 INFO L125 PetriNetUnfolderBase]: For 7046/7046 co-relation queries the response was YES. [2024-06-20 15:53:07,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2431 conditions, 423 events. 223/423 cut-off events. For 7046/7046 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1757 event pairs, 58 based on Foata normal form. 1/424 useless extension candidates. Maximal degree in co-relation 2384. Up to 323 conditions per place. [2024-06-20 15:53:07,997 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 67 selfloop transitions, 33 changer transitions 0/103 dead transitions. [2024-06-20 15:53:07,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 103 transitions, 1021 flow [2024-06-20 15:53:07,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:53:07,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:53:07,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 98 transitions. [2024-06-20 15:53:07,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-20 15:53:07,999 INFO L175 Difference]: Start difference. First operand has 99 places, 93 transitions, 741 flow. Second operand 8 states and 98 transitions. [2024-06-20 15:53:07,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 103 transitions, 1021 flow [2024-06-20 15:53:08,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 103 transitions, 983 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 15:53:08,007 INFO L231 Difference]: Finished difference. Result has 101 places, 95 transitions, 824 flow [2024-06-20 15:53:08,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=703, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=824, PETRI_PLACES=101, PETRI_TRANSITIONS=95} [2024-06-20 15:53:08,008 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 72 predicate places. [2024-06-20 15:53:08,008 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 95 transitions, 824 flow [2024-06-20 15:53:08,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:53:08,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:08,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:08,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 15:53:08,009 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:08,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:08,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1812916850, now seen corresponding path program 5 times [2024-06-20 15:53:08,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:08,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298058312] [2024-06-20 15:53:08,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:08,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:08,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:08,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:08,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:08,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298058312] [2024-06-20 15:53:08,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298058312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:08,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:08,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:53:08,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324595379] [2024-06-20 15:53:08,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:08,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:53:08,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:08,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:53:08,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:53:08,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:08,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 95 transitions, 824 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:53:08,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:08,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:08,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:09,018 INFO L124 PetriNetUnfolderBase]: 229/433 cut-off events. [2024-06-20 15:53:09,018 INFO L125 PetriNetUnfolderBase]: For 8406/8406 co-relation queries the response was YES. [2024-06-20 15:53:09,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2593 conditions, 433 events. 229/433 cut-off events. For 8406/8406 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1807 event pairs, 58 based on Foata normal form. 2/435 useless extension candidates. Maximal degree in co-relation 2545. Up to 289 conditions per place. [2024-06-20 15:53:09,022 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 65 selfloop transitions, 43 changer transitions 0/111 dead transitions. [2024-06-20 15:53:09,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 111 transitions, 1224 flow [2024-06-20 15:53:09,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:53:09,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:53:09,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 104 transitions. [2024-06-20 15:53:09,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-20 15:53:09,025 INFO L175 Difference]: Start difference. First operand has 101 places, 95 transitions, 824 flow. Second operand 8 states and 104 transitions. [2024-06-20 15:53:09,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 111 transitions, 1224 flow [2024-06-20 15:53:09,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 111 transitions, 1119 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-20 15:53:09,035 INFO L231 Difference]: Finished difference. Result has 104 places, 100 transitions, 930 flow [2024-06-20 15:53:09,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=719, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=930, PETRI_PLACES=104, PETRI_TRANSITIONS=100} [2024-06-20 15:53:09,036 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 75 predicate places. [2024-06-20 15:53:09,036 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 100 transitions, 930 flow [2024-06-20 15:53:09,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:53:09,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:09,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:09,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 15:53:09,037 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:09,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:09,037 INFO L85 PathProgramCache]: Analyzing trace with hash 176316476, now seen corresponding path program 1 times [2024-06-20 15:53:09,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:09,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748731080] [2024-06-20 15:53:09,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:09,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:09,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:10,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:10,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:10,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748731080] [2024-06-20 15:53:10,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748731080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:10,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:10,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:10,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567150723] [2024-06-20 15:53:10,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:10,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:10,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:10,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:10,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:10,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:10,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 100 transitions, 930 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:10,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:10,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:10,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:10,731 INFO L124 PetriNetUnfolderBase]: 226/427 cut-off events. [2024-06-20 15:53:10,732 INFO L125 PetriNetUnfolderBase]: For 8665/8665 co-relation queries the response was YES. [2024-06-20 15:53:10,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2639 conditions, 427 events. 226/427 cut-off events. For 8665/8665 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1775 event pairs, 68 based on Foata normal form. 2/429 useless extension candidates. Maximal degree in co-relation 2589. Up to 378 conditions per place. [2024-06-20 15:53:10,735 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 92 selfloop transitions, 14 changer transitions 0/109 dead transitions. [2024-06-20 15:53:10,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 109 transitions, 1162 flow [2024-06-20 15:53:10,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:53:10,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:53:10,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-06-20 15:53:10,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37777777777777777 [2024-06-20 15:53:10,736 INFO L175 Difference]: Start difference. First operand has 104 places, 100 transitions, 930 flow. Second operand 9 states and 102 transitions. [2024-06-20 15:53:10,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 109 transitions, 1162 flow [2024-06-20 15:53:10,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 109 transitions, 1116 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 15:53:10,747 INFO L231 Difference]: Finished difference. Result has 109 places, 100 transitions, 916 flow [2024-06-20 15:53:10,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=884, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=916, PETRI_PLACES=109, PETRI_TRANSITIONS=100} [2024-06-20 15:53:10,748 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 80 predicate places. [2024-06-20 15:53:10,748 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 100 transitions, 916 flow [2024-06-20 15:53:10,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:10,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:10,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:10,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 15:53:10,749 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:10,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:10,749 INFO L85 PathProgramCache]: Analyzing trace with hash 62336480, now seen corresponding path program 1 times [2024-06-20 15:53:10,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:10,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49182863] [2024-06-20 15:53:10,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:10,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:10,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:11,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:11,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:11,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49182863] [2024-06-20 15:53:11,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49182863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:11,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:11,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:53:11,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788359512] [2024-06-20 15:53:11,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:11,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:53:11,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:11,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:53:11,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:53:11,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:11,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 100 transitions, 916 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:53:11,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:11,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:11,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:11,754 INFO L124 PetriNetUnfolderBase]: 235/449 cut-off events. [2024-06-20 15:53:11,754 INFO L125 PetriNetUnfolderBase]: For 9202/9202 co-relation queries the response was YES. [2024-06-20 15:53:11,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2720 conditions, 449 events. 235/449 cut-off events. For 9202/9202 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1933 event pairs, 45 based on Foata normal form. 2/451 useless extension candidates. Maximal degree in co-relation 2668. Up to 370 conditions per place. [2024-06-20 15:53:11,758 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 95 selfloop transitions, 20 changer transitions 0/118 dead transitions. [2024-06-20 15:53:11,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 118 transitions, 1206 flow [2024-06-20 15:53:11,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:53:11,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:53:11,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-06-20 15:53:11,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2024-06-20 15:53:11,759 INFO L175 Difference]: Start difference. First operand has 109 places, 100 transitions, 916 flow. Second operand 9 states and 111 transitions. [2024-06-20 15:53:11,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 118 transitions, 1206 flow [2024-06-20 15:53:11,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 118 transitions, 1168 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-20 15:53:11,770 INFO L231 Difference]: Finished difference. Result has 112 places, 102 transitions, 946 flow [2024-06-20 15:53:11,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=878, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=946, PETRI_PLACES=112, PETRI_TRANSITIONS=102} [2024-06-20 15:53:11,771 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 83 predicate places. [2024-06-20 15:53:11,771 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 102 transitions, 946 flow [2024-06-20 15:53:11,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:53:11,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:11,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:11,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 15:53:11,771 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:11,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:11,772 INFO L85 PathProgramCache]: Analyzing trace with hash 151539290, now seen corresponding path program 2 times [2024-06-20 15:53:11,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:11,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254815776] [2024-06-20 15:53:11,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:11,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:11,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:12,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:12,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:12,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254815776] [2024-06-20 15:53:12,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254815776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:12,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:12,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:53:12,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888984402] [2024-06-20 15:53:12,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:12,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:53:12,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:12,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:53:12,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:53:12,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:12,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 102 transitions, 946 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:53:12,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:12,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:12,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:12,819 INFO L124 PetriNetUnfolderBase]: 239/457 cut-off events. [2024-06-20 15:53:12,819 INFO L125 PetriNetUnfolderBase]: For 9392/9392 co-relation queries the response was YES. [2024-06-20 15:53:12,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2784 conditions, 457 events. 239/457 cut-off events. For 9392/9392 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1990 event pairs, 54 based on Foata normal form. 2/459 useless extension candidates. Maximal degree in co-relation 2730. Up to 387 conditions per place. [2024-06-20 15:53:12,823 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 93 selfloop transitions, 21 changer transitions 0/117 dead transitions. [2024-06-20 15:53:12,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 117 transitions, 1226 flow [2024-06-20 15:53:12,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:53:12,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:53:12,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 110 transitions. [2024-06-20 15:53:12,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-20 15:53:12,825 INFO L175 Difference]: Start difference. First operand has 112 places, 102 transitions, 946 flow. Second operand 9 states and 110 transitions. [2024-06-20 15:53:12,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 117 transitions, 1226 flow [2024-06-20 15:53:12,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 117 transitions, 1178 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 15:53:12,838 INFO L231 Difference]: Finished difference. Result has 115 places, 103 transitions, 962 flow [2024-06-20 15:53:12,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=898, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=962, PETRI_PLACES=115, PETRI_TRANSITIONS=103} [2024-06-20 15:53:12,840 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 86 predicate places. [2024-06-20 15:53:12,840 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 103 transitions, 962 flow [2024-06-20 15:53:12,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:53:12,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:12,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:12,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 15:53:12,841 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:12,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:12,841 INFO L85 PathProgramCache]: Analyzing trace with hash 615672706, now seen corresponding path program 3 times [2024-06-20 15:53:12,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:12,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647319526] [2024-06-20 15:53:12,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:12,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:12,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:13,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:13,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:13,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647319526] [2024-06-20 15:53:13,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647319526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:13,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:13,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:53:13,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56136000] [2024-06-20 15:53:13,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:13,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:53:13,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:13,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:53:13,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:53:13,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:13,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 103 transitions, 962 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:53:13,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:13,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:13,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:13,814 INFO L124 PetriNetUnfolderBase]: 248/476 cut-off events. [2024-06-20 15:53:13,814 INFO L125 PetriNetUnfolderBase]: For 10286/10286 co-relation queries the response was YES. [2024-06-20 15:53:13,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2880 conditions, 476 events. 248/476 cut-off events. For 10286/10286 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2105 event pairs, 29 based on Foata normal form. 2/478 useless extension candidates. Maximal degree in co-relation 2825. Up to 369 conditions per place. [2024-06-20 15:53:13,817 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 96 selfloop transitions, 22 changer transitions 0/121 dead transitions. [2024-06-20 15:53:13,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 121 transitions, 1262 flow [2024-06-20 15:53:13,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:53:13,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:53:13,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-06-20 15:53:13,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40370370370370373 [2024-06-20 15:53:13,819 INFO L175 Difference]: Start difference. First operand has 115 places, 103 transitions, 962 flow. Second operand 9 states and 109 transitions. [2024-06-20 15:53:13,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 121 transitions, 1262 flow [2024-06-20 15:53:13,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 121 transitions, 1208 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-20 15:53:13,832 INFO L231 Difference]: Finished difference. Result has 117 places, 105 transitions, 982 flow [2024-06-20 15:53:13,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=908, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=982, PETRI_PLACES=117, PETRI_TRANSITIONS=105} [2024-06-20 15:53:13,833 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 88 predicate places. [2024-06-20 15:53:13,833 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 105 transitions, 982 flow [2024-06-20 15:53:13,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:53:13,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:13,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:13,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 15:53:13,833 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:13,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:13,834 INFO L85 PathProgramCache]: Analyzing trace with hash 150996480, now seen corresponding path program 1 times [2024-06-20 15:53:13,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:13,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838219007] [2024-06-20 15:53:13,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:13,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:13,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:14,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:14,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:14,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838219007] [2024-06-20 15:53:14,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838219007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:14,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:14,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:14,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296086886] [2024-06-20 15:53:14,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:14,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:14,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:14,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:14,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:14,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:14,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 105 transitions, 982 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:14,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:14,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:14,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:15,039 INFO L124 PetriNetUnfolderBase]: 257/491 cut-off events. [2024-06-20 15:53:15,039 INFO L125 PetriNetUnfolderBase]: For 11030/11030 co-relation queries the response was YES. [2024-06-20 15:53:15,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3010 conditions, 491 events. 257/491 cut-off events. For 11030/11030 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2201 event pairs, 53 based on Foata normal form. 2/493 useless extension candidates. Maximal degree in co-relation 2954. Up to 418 conditions per place. [2024-06-20 15:53:15,042 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 97 selfloop transitions, 24 changer transitions 0/124 dead transitions. [2024-06-20 15:53:15,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 124 transitions, 1324 flow [2024-06-20 15:53:15,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:53:15,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:53:15,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2024-06-20 15:53:15,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4033333333333333 [2024-06-20 15:53:15,043 INFO L175 Difference]: Start difference. First operand has 117 places, 105 transitions, 982 flow. Second operand 10 states and 121 transitions. [2024-06-20 15:53:15,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 124 transitions, 1324 flow [2024-06-20 15:53:15,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 124 transitions, 1258 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-20 15:53:15,057 INFO L231 Difference]: Finished difference. Result has 121 places, 109 transitions, 1036 flow [2024-06-20 15:53:15,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1036, PETRI_PLACES=121, PETRI_TRANSITIONS=109} [2024-06-20 15:53:15,057 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 92 predicate places. [2024-06-20 15:53:15,058 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 109 transitions, 1036 flow [2024-06-20 15:53:15,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:15,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:15,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:15,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 15:53:15,058 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:15,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:15,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1993977620, now seen corresponding path program 4 times [2024-06-20 15:53:15,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:15,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525571902] [2024-06-20 15:53:15,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:15,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:15,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:15,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:15,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:15,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525571902] [2024-06-20 15:53:15,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525571902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:15,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:15,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:53:15,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903259947] [2024-06-20 15:53:15,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:15,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:53:15,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:15,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:53:15,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:53:15,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:15,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 109 transitions, 1036 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:53:15,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:15,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:15,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:15,997 INFO L124 PetriNetUnfolderBase]: 266/510 cut-off events. [2024-06-20 15:53:15,997 INFO L125 PetriNetUnfolderBase]: For 11716/11716 co-relation queries the response was YES. [2024-06-20 15:53:15,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3111 conditions, 510 events. 266/510 cut-off events. For 11716/11716 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2331 event pairs, 36 based on Foata normal form. 2/512 useless extension candidates. Maximal degree in co-relation 3054. Up to 431 conditions per place. [2024-06-20 15:53:16,000 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 104 selfloop transitions, 19 changer transitions 0/126 dead transitions. [2024-06-20 15:53:16,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 126 transitions, 1348 flow [2024-06-20 15:53:16,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:53:16,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:53:16,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-06-20 15:53:16,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2024-06-20 15:53:16,001 INFO L175 Difference]: Start difference. First operand has 121 places, 109 transitions, 1036 flow. Second operand 9 states and 111 transitions. [2024-06-20 15:53:16,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 126 transitions, 1348 flow [2024-06-20 15:53:16,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 126 transitions, 1270 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-20 15:53:16,014 INFO L231 Difference]: Finished difference. Result has 124 places, 111 transitions, 1032 flow [2024-06-20 15:53:16,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=958, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1032, PETRI_PLACES=124, PETRI_TRANSITIONS=111} [2024-06-20 15:53:16,015 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 95 predicate places. [2024-06-20 15:53:16,015 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 111 transitions, 1032 flow [2024-06-20 15:53:16,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:53:16,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:16,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:16,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 15:53:16,015 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:16,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:16,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1994038070, now seen corresponding path program 5 times [2024-06-20 15:53:16,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:16,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402994138] [2024-06-20 15:53:16,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:16,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:16,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:16,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:16,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:16,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402994138] [2024-06-20 15:53:16,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402994138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:16,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:16,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:53:16,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77011517] [2024-06-20 15:53:16,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:16,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:53:16,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:16,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:53:16,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:53:16,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:16,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 111 transitions, 1032 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:53:16,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:16,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:16,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:16,983 INFO L124 PetriNetUnfolderBase]: 270/518 cut-off events. [2024-06-20 15:53:16,983 INFO L125 PetriNetUnfolderBase]: For 12308/12308 co-relation queries the response was YES. [2024-06-20 15:53:16,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3137 conditions, 518 events. 270/518 cut-off events. For 12308/12308 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2386 event pairs, 38 based on Foata normal form. 2/520 useless extension candidates. Maximal degree in co-relation 3078. Up to 448 conditions per place. [2024-06-20 15:53:16,986 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 102 selfloop transitions, 20 changer transitions 0/125 dead transitions. [2024-06-20 15:53:16,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 125 transitions, 1332 flow [2024-06-20 15:53:16,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:53:16,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:53:16,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 110 transitions. [2024-06-20 15:53:16,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-20 15:53:16,986 INFO L175 Difference]: Start difference. First operand has 124 places, 111 transitions, 1032 flow. Second operand 9 states and 110 transitions. [2024-06-20 15:53:16,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 125 transitions, 1332 flow [2024-06-20 15:53:16,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 125 transitions, 1278 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 15:53:17,000 INFO L231 Difference]: Finished difference. Result has 127 places, 112 transitions, 1046 flow [2024-06-20 15:53:17,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1046, PETRI_PLACES=127, PETRI_TRANSITIONS=112} [2024-06-20 15:53:17,000 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 98 predicate places. [2024-06-20 15:53:17,001 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 112 transitions, 1046 flow [2024-06-20 15:53:17,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:53:17,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:17,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:17,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 15:53:17,001 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:17,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:17,001 INFO L85 PathProgramCache]: Analyzing trace with hash -467471070, now seen corresponding path program 6 times [2024-06-20 15:53:17,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:17,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207188507] [2024-06-20 15:53:17,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:17,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:17,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:17,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:17,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:17,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207188507] [2024-06-20 15:53:17,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207188507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:17,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:17,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:53:17,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031091824] [2024-06-20 15:53:17,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:17,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:53:17,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:17,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:53:17,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:53:17,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:17,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 112 transitions, 1046 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:53:17,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:17,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:17,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:17,977 INFO L124 PetriNetUnfolderBase]: 274/526 cut-off events. [2024-06-20 15:53:17,977 INFO L125 PetriNetUnfolderBase]: For 13117/13117 co-relation queries the response was YES. [2024-06-20 15:53:17,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3195 conditions, 526 events. 274/526 cut-off events. For 13117/13117 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2450 event pairs, 62 based on Foata normal form. 2/528 useless extension candidates. Maximal degree in co-relation 3135. Up to 469 conditions per place. [2024-06-20 15:53:17,980 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 108 selfloop transitions, 16 changer transitions 0/127 dead transitions. [2024-06-20 15:53:17,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 127 transitions, 1383 flow [2024-06-20 15:53:17,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:53:17,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:53:17,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 107 transitions. [2024-06-20 15:53:17,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3962962962962963 [2024-06-20 15:53:17,981 INFO L175 Difference]: Start difference. First operand has 127 places, 112 transitions, 1046 flow. Second operand 9 states and 107 transitions. [2024-06-20 15:53:17,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 127 transitions, 1383 flow [2024-06-20 15:53:17,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 127 transitions, 1325 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-20 15:53:17,998 INFO L231 Difference]: Finished difference. Result has 130 places, 115 transitions, 1090 flow [2024-06-20 15:53:17,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=988, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1090, PETRI_PLACES=130, PETRI_TRANSITIONS=115} [2024-06-20 15:53:17,998 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 101 predicate places. [2024-06-20 15:53:17,998 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 115 transitions, 1090 flow [2024-06-20 15:53:17,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:53:17,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:17,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:17,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 15:53:17,999 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:17,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:17,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1996839540, now seen corresponding path program 2 times [2024-06-20 15:53:18,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:18,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838325426] [2024-06-20 15:53:18,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:18,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:18,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:18,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:18,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:18,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838325426] [2024-06-20 15:53:18,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838325426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:18,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:18,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:18,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176688643] [2024-06-20 15:53:18,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:18,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:18,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:18,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:18,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:18,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:18,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 115 transitions, 1090 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:18,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:18,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:18,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:19,119 INFO L124 PetriNetUnfolderBase]: 280/536 cut-off events. [2024-06-20 15:53:19,119 INFO L125 PetriNetUnfolderBase]: For 14102/14102 co-relation queries the response was YES. [2024-06-20 15:53:19,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3298 conditions, 536 events. 280/536 cut-off events. For 14102/14102 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2494 event pairs, 38 based on Foata normal form. 2/538 useless extension candidates. Maximal degree in co-relation 3236. Up to 463 conditions per place. [2024-06-20 15:53:19,123 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 105 selfloop transitions, 23 changer transitions 0/131 dead transitions. [2024-06-20 15:53:19,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 131 transitions, 1436 flow [2024-06-20 15:53:19,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:53:19,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:53:19,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2024-06-20 15:53:19,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4033333333333333 [2024-06-20 15:53:19,124 INFO L175 Difference]: Start difference. First operand has 130 places, 115 transitions, 1090 flow. Second operand 10 states and 121 transitions. [2024-06-20 15:53:19,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 131 transitions, 1436 flow [2024-06-20 15:53:19,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 131 transitions, 1368 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-20 15:53:19,141 INFO L231 Difference]: Finished difference. Result has 134 places, 117 transitions, 1125 flow [2024-06-20 15:53:19,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1022, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1125, PETRI_PLACES=134, PETRI_TRANSITIONS=117} [2024-06-20 15:53:19,141 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 105 predicate places. [2024-06-20 15:53:19,141 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 117 transitions, 1125 flow [2024-06-20 15:53:19,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:19,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:19,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:19,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 15:53:19,142 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:19,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:19,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1605740362, now seen corresponding path program 3 times [2024-06-20 15:53:19,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:19,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178889160] [2024-06-20 15:53:19,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:19,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:19,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:20,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:20,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:20,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178889160] [2024-06-20 15:53:20,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178889160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:20,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:20,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:20,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285292575] [2024-06-20 15:53:20,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:20,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:20,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:20,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:20,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:20,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:20,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 117 transitions, 1125 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:20,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:20,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:20,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:20,427 INFO L124 PetriNetUnfolderBase]: 298/569 cut-off events. [2024-06-20 15:53:20,427 INFO L125 PetriNetUnfolderBase]: For 16972/16972 co-relation queries the response was YES. [2024-06-20 15:53:20,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3713 conditions, 569 events. 298/569 cut-off events. For 16972/16972 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2704 event pairs, 62 based on Foata normal form. 1/570 useless extension candidates. Maximal degree in co-relation 3650. Up to 475 conditions per place. [2024-06-20 15:53:20,430 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 106 selfloop transitions, 30 changer transitions 0/139 dead transitions. [2024-06-20 15:53:20,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 139 transitions, 1725 flow [2024-06-20 15:53:20,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:53:20,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:53:20,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-20 15:53:20,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 15:53:20,431 INFO L175 Difference]: Start difference. First operand has 134 places, 117 transitions, 1125 flow. Second operand 10 states and 125 transitions. [2024-06-20 15:53:20,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 139 transitions, 1725 flow [2024-06-20 15:53:20,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 139 transitions, 1627 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-20 15:53:20,450 INFO L231 Difference]: Finished difference. Result has 135 places, 124 transitions, 1256 flow [2024-06-20 15:53:20,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1027, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1256, PETRI_PLACES=135, PETRI_TRANSITIONS=124} [2024-06-20 15:53:20,451 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 106 predicate places. [2024-06-20 15:53:20,451 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 124 transitions, 1256 flow [2024-06-20 15:53:20,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:20,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:20,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:20,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 15:53:20,451 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:20,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:20,451 INFO L85 PathProgramCache]: Analyzing trace with hash 109636624, now seen corresponding path program 4 times [2024-06-20 15:53:20,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:20,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297215281] [2024-06-20 15:53:20,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:20,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:20,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:21,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:21,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:21,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297215281] [2024-06-20 15:53:21,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297215281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:21,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:21,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:21,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746002966] [2024-06-20 15:53:21,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:21,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:21,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:21,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:21,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:21,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:21,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 124 transitions, 1256 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:21,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:21,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:21,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:21,742 INFO L124 PetriNetUnfolderBase]: 294/563 cut-off events. [2024-06-20 15:53:21,743 INFO L125 PetriNetUnfolderBase]: For 16841/16841 co-relation queries the response was YES. [2024-06-20 15:53:21,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3588 conditions, 563 events. 294/563 cut-off events. For 16841/16841 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2665 event pairs, 62 based on Foata normal form. 2/565 useless extension candidates. Maximal degree in co-relation 3525. Up to 472 conditions per place. [2024-06-20 15:53:21,749 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 106 selfloop transitions, 29 changer transitions 0/138 dead transitions. [2024-06-20 15:53:21,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 138 transitions, 1630 flow [2024-06-20 15:53:21,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:53:21,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:53:21,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-20 15:53:21,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41 [2024-06-20 15:53:21,753 INFO L175 Difference]: Start difference. First operand has 135 places, 124 transitions, 1256 flow. Second operand 10 states and 123 transitions. [2024-06-20 15:53:21,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 138 transitions, 1630 flow [2024-06-20 15:53:21,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 138 transitions, 1517 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-20 15:53:21,794 INFO L231 Difference]: Finished difference. Result has 140 places, 124 transitions, 1208 flow [2024-06-20 15:53:21,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1143, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1208, PETRI_PLACES=140, PETRI_TRANSITIONS=124} [2024-06-20 15:53:21,795 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 111 predicate places. [2024-06-20 15:53:21,795 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 124 transitions, 1208 flow [2024-06-20 15:53:21,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:21,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:21,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:21,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 15:53:21,795 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:21,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:21,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1900780446, now seen corresponding path program 7 times [2024-06-20 15:53:21,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:21,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328828468] [2024-06-20 15:53:21,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:21,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:21,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:22,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:22,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:22,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328828468] [2024-06-20 15:53:22,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328828468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:22,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:22,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:53:22,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670182525] [2024-06-20 15:53:22,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:22,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:53:22,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:22,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:53:22,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:53:22,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:22,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 124 transitions, 1208 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:53:22,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:22,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:22,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:22,662 INFO L124 PetriNetUnfolderBase]: 298/571 cut-off events. [2024-06-20 15:53:22,662 INFO L125 PetriNetUnfolderBase]: For 17139/17139 co-relation queries the response was YES. [2024-06-20 15:53:22,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3611 conditions, 571 events. 298/571 cut-off events. For 17139/17139 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2709 event pairs, 57 based on Foata normal form. 2/573 useless extension candidates. Maximal degree in co-relation 3546. Up to 479 conditions per place. [2024-06-20 15:53:22,666 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 108 selfloop transitions, 26 changer transitions 0/137 dead transitions. [2024-06-20 15:53:22,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 137 transitions, 1532 flow [2024-06-20 15:53:22,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:53:22,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:53:22,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 99 transitions. [2024-06-20 15:53:22,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-20 15:53:22,667 INFO L175 Difference]: Start difference. First operand has 140 places, 124 transitions, 1208 flow. Second operand 8 states and 99 transitions. [2024-06-20 15:53:22,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 137 transitions, 1532 flow [2024-06-20 15:53:22,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 137 transitions, 1480 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-20 15:53:22,690 INFO L231 Difference]: Finished difference. Result has 140 places, 125 transitions, 1244 flow [2024-06-20 15:53:22,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1156, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1244, PETRI_PLACES=140, PETRI_TRANSITIONS=125} [2024-06-20 15:53:22,690 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 111 predicate places. [2024-06-20 15:53:22,691 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 125 transitions, 1244 flow [2024-06-20 15:53:22,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:53:22,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:22,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:22,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 15:53:22,691 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:22,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:22,692 INFO L85 PathProgramCache]: Analyzing trace with hash 354153116, now seen corresponding path program 8 times [2024-06-20 15:53:22,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:22,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963595888] [2024-06-20 15:53:22,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:22,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:22,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:23,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:23,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:23,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963595888] [2024-06-20 15:53:23,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963595888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:23,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:23,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:53:23,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661071820] [2024-06-20 15:53:23,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:23,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:53:23,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:23,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:53:23,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:53:23,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:23,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 125 transitions, 1244 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:53:23,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:23,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:23,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:23,605 INFO L124 PetriNetUnfolderBase]: 302/579 cut-off events. [2024-06-20 15:53:23,605 INFO L125 PetriNetUnfolderBase]: For 18369/18369 co-relation queries the response was YES. [2024-06-20 15:53:23,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3717 conditions, 579 events. 302/579 cut-off events. For 18369/18369 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 2755 event pairs, 30 based on Foata normal form. 2/581 useless extension candidates. Maximal degree in co-relation 3651. Up to 437 conditions per place. [2024-06-20 15:53:23,609 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 111 selfloop transitions, 25 changer transitions 0/139 dead transitions. [2024-06-20 15:53:23,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 139 transitions, 1576 flow [2024-06-20 15:53:23,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:53:23,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:53:23,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 98 transitions. [2024-06-20 15:53:23,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-20 15:53:23,610 INFO L175 Difference]: Start difference. First operand has 140 places, 125 transitions, 1244 flow. Second operand 8 states and 98 transitions. [2024-06-20 15:53:23,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 139 transitions, 1576 flow [2024-06-20 15:53:23,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 139 transitions, 1498 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-20 15:53:23,635 INFO L231 Difference]: Finished difference. Result has 142 places, 126 transitions, 1256 flow [2024-06-20 15:53:23,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1170, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1256, PETRI_PLACES=142, PETRI_TRANSITIONS=126} [2024-06-20 15:53:23,635 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 113 predicate places. [2024-06-20 15:53:23,635 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 126 transitions, 1256 flow [2024-06-20 15:53:23,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:53:23,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:23,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:23,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 15:53:23,636 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:23,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:23,636 INFO L85 PathProgramCache]: Analyzing trace with hash 472301246, now seen corresponding path program 9 times [2024-06-20 15:53:23,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:23,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964317126] [2024-06-20 15:53:23,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:23,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:23,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:24,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:24,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:24,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964317126] [2024-06-20 15:53:24,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964317126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:24,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:24,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:53:24,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498813817] [2024-06-20 15:53:24,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:24,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:53:24,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:24,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:53:24,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:53:24,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:24,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 126 transitions, 1256 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:53:24,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:24,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:24,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:24,565 INFO L124 PetriNetUnfolderBase]: 306/587 cut-off events. [2024-06-20 15:53:24,565 INFO L125 PetriNetUnfolderBase]: For 17493/17493 co-relation queries the response was YES. [2024-06-20 15:53:24,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3737 conditions, 587 events. 306/587 cut-off events. For 17493/17493 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 2808 event pairs, 64 based on Foata normal form. 2/589 useless extension candidates. Maximal degree in co-relation 3670. Up to 514 conditions per place. [2024-06-20 15:53:24,569 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 116 selfloop transitions, 20 changer transitions 0/139 dead transitions. [2024-06-20 15:53:24,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 139 transitions, 1611 flow [2024-06-20 15:53:24,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:53:24,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:53:24,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 96 transitions. [2024-06-20 15:53:24,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 15:53:24,570 INFO L175 Difference]: Start difference. First operand has 142 places, 126 transitions, 1256 flow. Second operand 8 states and 96 transitions. [2024-06-20 15:53:24,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 139 transitions, 1611 flow [2024-06-20 15:53:24,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 139 transitions, 1535 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-20 15:53:24,596 INFO L231 Difference]: Finished difference. Result has 145 places, 129 transitions, 1295 flow [2024-06-20 15:53:24,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1186, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1295, PETRI_PLACES=145, PETRI_TRANSITIONS=129} [2024-06-20 15:53:24,598 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 116 predicate places. [2024-06-20 15:53:24,598 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 129 transitions, 1295 flow [2024-06-20 15:53:24,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:53:24,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:24,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:24,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 15:53:24,598 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:24,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:24,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1900775486, now seen corresponding path program 5 times [2024-06-20 15:53:24,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:24,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404125777] [2024-06-20 15:53:24,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:24,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:24,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:25,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:25,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:25,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404125777] [2024-06-20 15:53:25,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404125777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:25,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:25,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:25,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092905622] [2024-06-20 15:53:25,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:25,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:25,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:25,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:25,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:25,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:25,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 129 transitions, 1295 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:25,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:25,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:25,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:25,720 INFO L124 PetriNetUnfolderBase]: 312/601 cut-off events. [2024-06-20 15:53:25,720 INFO L125 PetriNetUnfolderBase]: For 16258/16258 co-relation queries the response was YES. [2024-06-20 15:53:25,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3778 conditions, 601 events. 312/601 cut-off events. For 16258/16258 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 2925 event pairs, 55 based on Foata normal form. 2/603 useless extension candidates. Maximal degree in co-relation 3709. Up to 496 conditions per place. [2024-06-20 15:53:25,724 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 106 selfloop transitions, 35 changer transitions 0/144 dead transitions. [2024-06-20 15:53:25,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 144 transitions, 1673 flow [2024-06-20 15:53:25,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:53:25,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:53:25,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 110 transitions. [2024-06-20 15:53:25,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-20 15:53:25,725 INFO L175 Difference]: Start difference. First operand has 145 places, 129 transitions, 1295 flow. Second operand 9 states and 110 transitions. [2024-06-20 15:53:25,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 144 transitions, 1673 flow [2024-06-20 15:53:25,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 144 transitions, 1601 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-20 15:53:25,750 INFO L231 Difference]: Finished difference. Result has 149 places, 131 transitions, 1364 flow [2024-06-20 15:53:25,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1223, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1364, PETRI_PLACES=149, PETRI_TRANSITIONS=131} [2024-06-20 15:53:25,750 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 120 predicate places. [2024-06-20 15:53:25,751 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 131 transitions, 1364 flow [2024-06-20 15:53:25,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:25,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:25,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:25,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 15:53:25,751 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:25,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:25,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1785304578, now seen corresponding path program 1 times [2024-06-20 15:53:25,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:25,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107839445] [2024-06-20 15:53:25,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:25,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:25,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:26,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:26,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:26,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107839445] [2024-06-20 15:53:26,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107839445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:26,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:26,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:53:26,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032901229] [2024-06-20 15:53:26,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:26,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:53:26,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:26,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:53:26,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:53:26,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:26,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 131 transitions, 1364 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:26,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:26,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:26,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:26,756 INFO L124 PetriNetUnfolderBase]: 318/611 cut-off events. [2024-06-20 15:53:26,756 INFO L125 PetriNetUnfolderBase]: For 16499/16499 co-relation queries the response was YES. [2024-06-20 15:53:26,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3891 conditions, 611 events. 318/611 cut-off events. For 16499/16499 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 2985 event pairs, 63 based on Foata normal form. 2/613 useless extension candidates. Maximal degree in co-relation 3821. Up to 510 conditions per place. [2024-06-20 15:53:26,760 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 108 selfloop transitions, 32 changer transitions 0/143 dead transitions. [2024-06-20 15:53:26,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 143 transitions, 1733 flow [2024-06-20 15:53:26,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:53:26,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:53:26,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 100 transitions. [2024-06-20 15:53:26,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 15:53:26,761 INFO L175 Difference]: Start difference. First operand has 149 places, 131 transitions, 1364 flow. Second operand 8 states and 100 transitions. [2024-06-20 15:53:26,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 143 transitions, 1733 flow [2024-06-20 15:53:26,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 143 transitions, 1636 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-20 15:53:26,786 INFO L231 Difference]: Finished difference. Result has 150 places, 134 transitions, 1418 flow [2024-06-20 15:53:26,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1267, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1418, PETRI_PLACES=150, PETRI_TRANSITIONS=134} [2024-06-20 15:53:26,787 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 121 predicate places. [2024-06-20 15:53:26,787 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 134 transitions, 1418 flow [2024-06-20 15:53:26,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:26,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:26,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:26,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 15:53:26,788 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:26,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:26,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1785304826, now seen corresponding path program 6 times [2024-06-20 15:53:26,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:26,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616224029] [2024-06-20 15:53:26,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:26,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:26,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:27,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:27,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:27,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616224029] [2024-06-20 15:53:27,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616224029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:27,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:27,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:27,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619415802] [2024-06-20 15:53:27,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:27,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:27,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:27,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:27,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:27,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:27,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 134 transitions, 1418 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:27,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:27,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:27,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:28,221 INFO L124 PetriNetUnfolderBase]: 334/639 cut-off events. [2024-06-20 15:53:28,221 INFO L125 PetriNetUnfolderBase]: For 19163/19163 co-relation queries the response was YES. [2024-06-20 15:53:28,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4266 conditions, 639 events. 334/639 cut-off events. For 19163/19163 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3147 event pairs, 65 based on Foata normal form. 2/641 useless extension candidates. Maximal degree in co-relation 4195. Up to 498 conditions per place. [2024-06-20 15:53:28,224 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 103 selfloop transitions, 45 changer transitions 0/151 dead transitions. [2024-06-20 15:53:28,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 151 transitions, 1948 flow [2024-06-20 15:53:28,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:53:28,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:53:28,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 112 transitions. [2024-06-20 15:53:28,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4148148148148148 [2024-06-20 15:53:28,229 INFO L175 Difference]: Start difference. First operand has 150 places, 134 transitions, 1418 flow. Second operand 9 states and 112 transitions. [2024-06-20 15:53:28,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 151 transitions, 1948 flow [2024-06-20 15:53:28,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 151 transitions, 1854 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-20 15:53:28,255 INFO L231 Difference]: Finished difference. Result has 153 places, 139 transitions, 1562 flow [2024-06-20 15:53:28,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1324, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1562, PETRI_PLACES=153, PETRI_TRANSITIONS=139} [2024-06-20 15:53:28,256 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 124 predicate places. [2024-06-20 15:53:28,256 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 139 transitions, 1562 flow [2024-06-20 15:53:28,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:28,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:28,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:28,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 15:53:28,257 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:28,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:28,257 INFO L85 PathProgramCache]: Analyzing trace with hash 472479186, now seen corresponding path program 7 times [2024-06-20 15:53:28,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:28,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944453556] [2024-06-20 15:53:28,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:28,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:28,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:29,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:29,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:29,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944453556] [2024-06-20 15:53:29,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944453556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:29,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:29,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:29,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467843492] [2024-06-20 15:53:29,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:29,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:29,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:29,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:29,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:29,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:29,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 139 transitions, 1562 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:29,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:29,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:29,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:29,655 INFO L124 PetriNetUnfolderBase]: 332/636 cut-off events. [2024-06-20 15:53:29,655 INFO L125 PetriNetUnfolderBase]: For 19181/19181 co-relation queries the response was YES. [2024-06-20 15:53:29,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4281 conditions, 636 events. 332/636 cut-off events. For 19181/19181 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3124 event pairs, 64 based on Foata normal form. 1/637 useless extension candidates. Maximal degree in co-relation 4209. Up to 527 conditions per place. [2024-06-20 15:53:29,659 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 113 selfloop transitions, 37 changer transitions 0/153 dead transitions. [2024-06-20 15:53:29,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 153 transitions, 1995 flow [2024-06-20 15:53:29,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:53:29,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:53:29,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 110 transitions. [2024-06-20 15:53:29,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-20 15:53:29,660 INFO L175 Difference]: Start difference. First operand has 153 places, 139 transitions, 1562 flow. Second operand 9 states and 110 transitions. [2024-06-20 15:53:29,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 153 transitions, 1995 flow [2024-06-20 15:53:29,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 153 transitions, 1858 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-20 15:53:29,687 INFO L231 Difference]: Finished difference. Result has 157 places, 143 transitions, 1636 flow [2024-06-20 15:53:29,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1464, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1636, PETRI_PLACES=157, PETRI_TRANSITIONS=143} [2024-06-20 15:53:29,687 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 128 predicate places. [2024-06-20 15:53:29,687 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 143 transitions, 1636 flow [2024-06-20 15:53:29,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:29,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:29,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:29,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 15:53:29,688 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:29,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:29,688 INFO L85 PathProgramCache]: Analyzing trace with hash 934176900, now seen corresponding path program 10 times [2024-06-20 15:53:29,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:29,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247236555] [2024-06-20 15:53:29,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:29,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:29,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:30,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:30,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:30,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247236555] [2024-06-20 15:53:30,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247236555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:30,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:30,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:53:30,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648314656] [2024-06-20 15:53:30,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:30,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:53:30,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:30,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:53:30,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:53:30,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:30,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 143 transitions, 1636 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:53:30,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:30,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:30,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:30,642 INFO L124 PetriNetUnfolderBase]: 329/631 cut-off events. [2024-06-20 15:53:30,643 INFO L125 PetriNetUnfolderBase]: For 17889/17889 co-relation queries the response was YES. [2024-06-20 15:53:30,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4193 conditions, 631 events. 329/631 cut-off events. For 17889/17889 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3113 event pairs, 66 based on Foata normal form. 2/633 useless extension candidates. Maximal degree in co-relation 4119. Up to 549 conditions per place. [2024-06-20 15:53:30,646 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 129 selfloop transitions, 21 changer transitions 0/153 dead transitions. [2024-06-20 15:53:30,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 153 transitions, 1985 flow [2024-06-20 15:53:30,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:53:30,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:53:30,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 96 transitions. [2024-06-20 15:53:30,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 15:53:30,647 INFO L175 Difference]: Start difference. First operand has 157 places, 143 transitions, 1636 flow. Second operand 8 states and 96 transitions. [2024-06-20 15:53:30,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 153 transitions, 1985 flow [2024-06-20 15:53:30,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 153 transitions, 1878 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-20 15:53:30,674 INFO L231 Difference]: Finished difference. Result has 159 places, 145 transitions, 1611 flow [2024-06-20 15:53:30,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1529, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1611, PETRI_PLACES=159, PETRI_TRANSITIONS=145} [2024-06-20 15:53:30,675 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 130 predicate places. [2024-06-20 15:53:30,675 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 145 transitions, 1611 flow [2024-06-20 15:53:30,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 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) [2024-06-20 15:53:30,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:30,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:30,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 15:53:30,676 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:30,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:30,676 INFO L85 PathProgramCache]: Analyzing trace with hash 934361350, now seen corresponding path program 8 times [2024-06-20 15:53:30,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:30,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747870090] [2024-06-20 15:53:30,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:30,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:30,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:31,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:31,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:31,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747870090] [2024-06-20 15:53:31,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747870090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:31,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:31,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:31,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291333494] [2024-06-20 15:53:31,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:31,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:31,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:31,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:31,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:31,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:31,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 145 transitions, 1611 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:31,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:31,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:31,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:32,033 INFO L124 PetriNetUnfolderBase]: 346/664 cut-off events. [2024-06-20 15:53:32,033 INFO L125 PetriNetUnfolderBase]: For 20423/20423 co-relation queries the response was YES. [2024-06-20 15:53:32,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4579 conditions, 664 events. 346/664 cut-off events. For 20423/20423 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3302 event pairs, 68 based on Foata normal form. 2/666 useless extension candidates. Maximal degree in co-relation 4504. Up to 542 conditions per place. [2024-06-20 15:53:32,037 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 124 selfloop transitions, 33 changer transitions 0/160 dead transitions. [2024-06-20 15:53:32,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 160 transitions, 2171 flow [2024-06-20 15:53:32,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:53:32,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:53:32,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 112 transitions. [2024-06-20 15:53:32,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4148148148148148 [2024-06-20 15:53:32,038 INFO L175 Difference]: Start difference. First operand has 159 places, 145 transitions, 1611 flow. Second operand 9 states and 112 transitions. [2024-06-20 15:53:32,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 160 transitions, 2171 flow [2024-06-20 15:53:32,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 160 transitions, 2065 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-20 15:53:32,069 INFO L231 Difference]: Finished difference. Result has 162 places, 150 transitions, 1726 flow [2024-06-20 15:53:32,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1505, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1726, PETRI_PLACES=162, PETRI_TRANSITIONS=150} [2024-06-20 15:53:32,070 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 133 predicate places. [2024-06-20 15:53:32,070 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 150 transitions, 1726 flow [2024-06-20 15:53:32,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:32,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:32,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:32,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 15:53:32,070 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:32,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:32,071 INFO L85 PathProgramCache]: Analyzing trace with hash 137947370, now seen corresponding path program 2 times [2024-06-20 15:53:32,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:32,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509217852] [2024-06-20 15:53:32,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:32,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:32,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:32,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:32,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:32,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509217852] [2024-06-20 15:53:32,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509217852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:32,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:32,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:32,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955202730] [2024-06-20 15:53:32,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:32,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:32,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:32,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:32,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:33,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:33,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 150 transitions, 1726 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:33,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:33,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:33,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:33,277 INFO L124 PetriNetUnfolderBase]: 341/655 cut-off events. [2024-06-20 15:53:33,278 INFO L125 PetriNetUnfolderBase]: For 20043/20043 co-relation queries the response was YES. [2024-06-20 15:53:33,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4446 conditions, 655 events. 341/655 cut-off events. For 20043/20043 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3254 event pairs, 69 based on Foata normal form. 2/657 useless extension candidates. Maximal degree in co-relation 4370. Up to 557 conditions per place. [2024-06-20 15:53:33,282 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 127 selfloop transitions, 28 changer transitions 0/158 dead transitions. [2024-06-20 15:53:33,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 158 transitions, 2054 flow [2024-06-20 15:53:33,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:53:33,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:53:33,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 110 transitions. [2024-06-20 15:53:33,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-20 15:53:33,283 INFO L175 Difference]: Start difference. First operand has 162 places, 150 transitions, 1726 flow. Second operand 9 states and 110 transitions. [2024-06-20 15:53:33,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 158 transitions, 2054 flow [2024-06-20 15:53:33,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 158 transitions, 1900 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-20 15:53:33,316 INFO L231 Difference]: Finished difference. Result has 165 places, 150 transitions, 1634 flow [2024-06-20 15:53:33,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1572, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1634, PETRI_PLACES=165, PETRI_TRANSITIONS=150} [2024-06-20 15:53:33,316 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 136 predicate places. [2024-06-20 15:53:33,316 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 150 transitions, 1634 flow [2024-06-20 15:53:33,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:33,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:33,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:33,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 15:53:33,317 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:33,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:33,317 INFO L85 PathProgramCache]: Analyzing trace with hash 365848272, now seen corresponding path program 9 times [2024-06-20 15:53:33,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:33,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995770642] [2024-06-20 15:53:33,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:33,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:33,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:34,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:34,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:34,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995770642] [2024-06-20 15:53:34,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995770642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:34,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:34,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:34,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577911579] [2024-06-20 15:53:34,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:34,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:34,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:34,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:34,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:34,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:34,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 150 transitions, 1634 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:34,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:34,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:34,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:34,742 INFO L124 PetriNetUnfolderBase]: 349/670 cut-off events. [2024-06-20 15:53:34,742 INFO L125 PetriNetUnfolderBase]: For 20364/20364 co-relation queries the response was YES. [2024-06-20 15:53:34,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4550 conditions, 670 events. 349/670 cut-off events. For 20364/20364 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 3365 event pairs, 65 based on Foata normal form. 1/671 useless extension candidates. Maximal degree in co-relation 4473. Up to 495 conditions per place. [2024-06-20 15:53:34,746 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 115 selfloop transitions, 54 changer transitions 0/172 dead transitions. [2024-06-20 15:53:34,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 172 transitions, 2487 flow [2024-06-20 15:53:34,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:53:34,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:53:34,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-06-20 15:53:34,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-20 15:53:34,748 INFO L175 Difference]: Start difference. First operand has 165 places, 150 transitions, 1634 flow. Second operand 9 states and 115 transitions. [2024-06-20 15:53:34,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 172 transitions, 2487 flow [2024-06-20 15:53:34,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 172 transitions, 2375 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-20 15:53:34,783 INFO L231 Difference]: Finished difference. Result has 168 places, 160 transitions, 1943 flow [2024-06-20 15:53:34,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1522, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1943, PETRI_PLACES=168, PETRI_TRANSITIONS=160} [2024-06-20 15:53:34,784 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 139 predicate places. [2024-06-20 15:53:34,784 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 160 transitions, 1943 flow [2024-06-20 15:53:34,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:34,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:34,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:34,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 15:53:34,784 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:34,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:34,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1162255990, now seen corresponding path program 10 times [2024-06-20 15:53:34,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:34,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478378477] [2024-06-20 15:53:34,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:34,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:34,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:35,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:35,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:35,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478378477] [2024-06-20 15:53:35,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478378477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:35,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:35,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:35,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530485484] [2024-06-20 15:53:35,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:35,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:35,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:35,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:35,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:36,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:36,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 160 transitions, 1943 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:36,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:36,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:36,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:36,487 INFO L124 PetriNetUnfolderBase]: 347/669 cut-off events. [2024-06-20 15:53:36,487 INFO L125 PetriNetUnfolderBase]: For 20975/20975 co-relation queries the response was YES. [2024-06-20 15:53:36,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4623 conditions, 669 events. 347/669 cut-off events. For 20975/20975 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3378 event pairs, 65 based on Foata normal form. 1/670 useless extension candidates. Maximal degree in co-relation 4543. Up to 493 conditions per place. [2024-06-20 15:53:36,491 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 111 selfloop transitions, 59 changer transitions 0/173 dead transitions. [2024-06-20 15:53:36,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 173 transitions, 2503 flow [2024-06-20 15:53:36,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:53:36,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:53:36,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-06-20 15:53:36,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4066666666666667 [2024-06-20 15:53:36,493 INFO L175 Difference]: Start difference. First operand has 168 places, 160 transitions, 1943 flow. Second operand 10 states and 122 transitions. [2024-06-20 15:53:36,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 173 transitions, 2503 flow [2024-06-20 15:53:36,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 173 transitions, 2335 flow, removed 73 selfloop flow, removed 3 redundant places. [2024-06-20 15:53:36,537 INFO L231 Difference]: Finished difference. Result has 176 places, 163 transitions, 1953 flow [2024-06-20 15:53:36,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1791, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1953, PETRI_PLACES=176, PETRI_TRANSITIONS=163} [2024-06-20 15:53:36,537 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 147 predicate places. [2024-06-20 15:53:36,537 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 163 transitions, 1953 flow [2024-06-20 15:53:36,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:36,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:36,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:36,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 15:53:36,538 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:36,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:36,538 INFO L85 PathProgramCache]: Analyzing trace with hash 644611580, now seen corresponding path program 11 times [2024-06-20 15:53:36,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:36,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953492621] [2024-06-20 15:53:36,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:36,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:36,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:37,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:37,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:37,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953492621] [2024-06-20 15:53:37,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953492621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:37,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:37,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:37,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321137084] [2024-06-20 15:53:37,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:37,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:37,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:37,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:37,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:37,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:37,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 163 transitions, 1953 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:37,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:37,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:37,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:38,177 INFO L124 PetriNetUnfolderBase]: 345/663 cut-off events. [2024-06-20 15:53:38,177 INFO L125 PetriNetUnfolderBase]: For 19978/19978 co-relation queries the response was YES. [2024-06-20 15:53:38,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4555 conditions, 663 events. 345/663 cut-off events. For 19978/19978 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 3316 event pairs, 93 based on Foata normal form. 1/664 useless extension candidates. Maximal degree in co-relation 4472. Up to 599 conditions per place. [2024-06-20 15:53:38,182 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 153 selfloop transitions, 15 changer transitions 0/171 dead transitions. [2024-06-20 15:53:38,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 171 transitions, 2307 flow [2024-06-20 15:53:38,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:53:38,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:53:38,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 103 transitions. [2024-06-20 15:53:38,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3814814814814815 [2024-06-20 15:53:38,183 INFO L175 Difference]: Start difference. First operand has 176 places, 163 transitions, 1953 flow. Second operand 9 states and 103 transitions. [2024-06-20 15:53:38,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 171 transitions, 2307 flow [2024-06-20 15:53:38,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 171 transitions, 2149 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-20 15:53:38,236 INFO L231 Difference]: Finished difference. Result has 180 places, 163 transitions, 1830 flow [2024-06-20 15:53:38,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1795, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1830, PETRI_PLACES=180, PETRI_TRANSITIONS=163} [2024-06-20 15:53:38,237 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 151 predicate places. [2024-06-20 15:53:38,237 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 163 transitions, 1830 flow [2024-06-20 15:53:38,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:38,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:38,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:38,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 15:53:38,237 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:38,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:38,238 INFO L85 PathProgramCache]: Analyzing trace with hash 137940612, now seen corresponding path program 12 times [2024-06-20 15:53:38,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:38,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663359636] [2024-06-20 15:53:38,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:38,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:38,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:39,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:39,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:39,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663359636] [2024-06-20 15:53:39,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663359636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:39,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:39,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:39,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019703061] [2024-06-20 15:53:39,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:39,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:39,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:39,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:39,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:39,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:39,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 163 transitions, 1830 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:39,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:39,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:39,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:39,726 INFO L124 PetriNetUnfolderBase]: 343/661 cut-off events. [2024-06-20 15:53:39,726 INFO L125 PetriNetUnfolderBase]: For 19324/19324 co-relation queries the response was YES. [2024-06-20 15:53:39,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4353 conditions, 661 events. 343/661 cut-off events. For 19324/19324 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 3324 event pairs, 65 based on Foata normal form. 1/662 useless extension candidates. Maximal degree in co-relation 4269. Up to 558 conditions per place. [2024-06-20 15:53:39,731 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 138 selfloop transitions, 30 changer transitions 0/171 dead transitions. [2024-06-20 15:53:39,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 171 transitions, 2184 flow [2024-06-20 15:53:39,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:53:39,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:53:39,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 110 transitions. [2024-06-20 15:53:39,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-20 15:53:39,732 INFO L175 Difference]: Start difference. First operand has 180 places, 163 transitions, 1830 flow. Second operand 9 states and 110 transitions. [2024-06-20 15:53:39,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 171 transitions, 2184 flow [2024-06-20 15:53:39,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 171 transitions, 2115 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-20 15:53:39,775 INFO L231 Difference]: Finished difference. Result has 181 places, 163 transitions, 1826 flow [2024-06-20 15:53:39,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1761, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1826, PETRI_PLACES=181, PETRI_TRANSITIONS=163} [2024-06-20 15:53:39,775 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 152 predicate places. [2024-06-20 15:53:39,775 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 163 transitions, 1826 flow [2024-06-20 15:53:39,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:39,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:39,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:39,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 15:53:39,776 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:39,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:39,777 INFO L85 PathProgramCache]: Analyzing trace with hash -169210540, now seen corresponding path program 1 times [2024-06-20 15:53:39,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:39,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272349061] [2024-06-20 15:53:39,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:39,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:39,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:40,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:40,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:40,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272349061] [2024-06-20 15:53:40,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272349061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:40,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:40,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:40,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428197263] [2024-06-20 15:53:40,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:40,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:40,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:40,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:40,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:40,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:40,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 163 transitions, 1826 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:40,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:40,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:40,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:41,054 INFO L124 PetriNetUnfolderBase]: 347/669 cut-off events. [2024-06-20 15:53:41,054 INFO L125 PetriNetUnfolderBase]: For 21040/21040 co-relation queries the response was YES. [2024-06-20 15:53:41,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4419 conditions, 669 events. 347/669 cut-off events. For 21040/21040 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3372 event pairs, 48 based on Foata normal form. 2/671 useless extension candidates. Maximal degree in co-relation 4334. Up to 566 conditions per place. [2024-06-20 15:53:41,059 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 158 selfloop transitions, 21 changer transitions 0/182 dead transitions. [2024-06-20 15:53:41,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 182 transitions, 2246 flow [2024-06-20 15:53:41,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:53:41,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:53:41,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2024-06-20 15:53:41,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4033333333333333 [2024-06-20 15:53:41,059 INFO L175 Difference]: Start difference. First operand has 181 places, 163 transitions, 1826 flow. Second operand 10 states and 121 transitions. [2024-06-20 15:53:41,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 182 transitions, 2246 flow [2024-06-20 15:53:41,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 182 transitions, 2130 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-20 15:53:41,100 INFO L231 Difference]: Finished difference. Result has 184 places, 164 transitions, 1774 flow [2024-06-20 15:53:41,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1710, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1774, PETRI_PLACES=184, PETRI_TRANSITIONS=164} [2024-06-20 15:53:41,101 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 155 predicate places. [2024-06-20 15:53:41,101 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 164 transitions, 1774 flow [2024-06-20 15:53:41,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:41,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:41,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:41,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 15:53:41,101 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:41,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:41,101 INFO L85 PathProgramCache]: Analyzing trace with hash 385770780, now seen corresponding path program 2 times [2024-06-20 15:53:41,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:41,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74865770] [2024-06-20 15:53:41,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:41,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:41,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:42,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:42,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:42,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74865770] [2024-06-20 15:53:42,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74865770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:42,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:42,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:42,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902089567] [2024-06-20 15:53:42,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:42,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:42,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:42,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:42,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:42,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:42,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 164 transitions, 1774 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:42,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:42,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:42,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:42,463 INFO L124 PetriNetUnfolderBase]: 351/677 cut-off events. [2024-06-20 15:53:42,463 INFO L125 PetriNetUnfolderBase]: For 21305/21305 co-relation queries the response was YES. [2024-06-20 15:53:42,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4445 conditions, 677 events. 351/677 cut-off events. For 21305/21305 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3416 event pairs, 55 based on Foata normal form. 2/679 useless extension candidates. Maximal degree in co-relation 4359. Up to 583 conditions per place. [2024-06-20 15:53:42,467 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 156 selfloop transitions, 22 changer transitions 0/181 dead transitions. [2024-06-20 15:53:42,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 181 transitions, 2188 flow [2024-06-20 15:53:42,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:53:42,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:53:42,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-06-20 15:53:42,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 15:53:42,469 INFO L175 Difference]: Start difference. First operand has 184 places, 164 transitions, 1774 flow. Second operand 10 states and 120 transitions. [2024-06-20 15:53:42,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 181 transitions, 2188 flow [2024-06-20 15:53:42,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 181 transitions, 2130 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-20 15:53:42,512 INFO L231 Difference]: Finished difference. Result has 186 places, 165 transitions, 1784 flow [2024-06-20 15:53:42,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1716, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1784, PETRI_PLACES=186, PETRI_TRANSITIONS=165} [2024-06-20 15:53:42,513 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 157 predicate places. [2024-06-20 15:53:42,513 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 165 transitions, 1784 flow [2024-06-20 15:53:42,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:42,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:42,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:42,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 15:53:42,513 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:42,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:42,513 INFO L85 PathProgramCache]: Analyzing trace with hash 407368170, now seen corresponding path program 3 times [2024-06-20 15:53:42,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:42,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881538896] [2024-06-20 15:53:42,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:42,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:42,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:43,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:43,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:43,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881538896] [2024-06-20 15:53:43,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881538896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:43,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:43,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:43,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438901898] [2024-06-20 15:53:43,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:43,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:43,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:43,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:43,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:43,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:43,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 165 transitions, 1784 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:43,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:43,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:43,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:43,751 INFO L124 PetriNetUnfolderBase]: 355/685 cut-off events. [2024-06-20 15:53:43,751 INFO L125 PetriNetUnfolderBase]: For 22624/22624 co-relation queries the response was YES. [2024-06-20 15:53:43,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4496 conditions, 685 events. 355/685 cut-off events. For 22624/22624 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3472 event pairs, 61 based on Foata normal form. 2/687 useless extension candidates. Maximal degree in co-relation 4409. Up to 596 conditions per place. [2024-06-20 15:53:43,755 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 155 selfloop transitions, 23 changer transitions 0/181 dead transitions. [2024-06-20 15:53:43,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 181 transitions, 2198 flow [2024-06-20 15:53:43,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:53:43,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:53:43,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-06-20 15:53:43,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 15:53:43,756 INFO L175 Difference]: Start difference. First operand has 186 places, 165 transitions, 1784 flow. Second operand 10 states and 120 transitions. [2024-06-20 15:53:43,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 181 transitions, 2198 flow [2024-06-20 15:53:43,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 181 transitions, 2140 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-20 15:53:43,806 INFO L231 Difference]: Finished difference. Result has 188 places, 166 transitions, 1798 flow [2024-06-20 15:53:43,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1726, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1798, PETRI_PLACES=188, PETRI_TRANSITIONS=166} [2024-06-20 15:53:43,807 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 159 predicate places. [2024-06-20 15:53:43,807 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 166 transitions, 1798 flow [2024-06-20 15:53:43,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:43,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:43,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:43,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 15:53:43,807 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:43,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:43,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1684230258, now seen corresponding path program 4 times [2024-06-20 15:53:43,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:43,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627741335] [2024-06-20 15:53:43,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:43,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:43,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:44,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:44,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:44,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627741335] [2024-06-20 15:53:44,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627741335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:44,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:44,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:44,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120714127] [2024-06-20 15:53:44,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:44,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:44,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:44,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:44,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:44,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:44,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 166 transitions, 1798 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:44,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:44,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:44,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:45,117 INFO L124 PetriNetUnfolderBase]: 359/693 cut-off events. [2024-06-20 15:53:45,117 INFO L125 PetriNetUnfolderBase]: For 23573/23573 co-relation queries the response was YES. [2024-06-20 15:53:45,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4553 conditions, 693 events. 359/693 cut-off events. For 23573/23573 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 3544 event pairs, 31 based on Foata normal form. 2/695 useless extension candidates. Maximal degree in co-relation 4465. Up to 555 conditions per place. [2024-06-20 15:53:45,122 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 158 selfloop transitions, 24 changer transitions 0/185 dead transitions. [2024-06-20 15:53:45,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 185 transitions, 2228 flow [2024-06-20 15:53:45,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:53:45,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:53:45,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-20 15:53:45,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39666666666666667 [2024-06-20 15:53:45,123 INFO L175 Difference]: Start difference. First operand has 188 places, 166 transitions, 1798 flow. Second operand 10 states and 119 transitions. [2024-06-20 15:53:45,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 185 transitions, 2228 flow [2024-06-20 15:53:45,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 185 transitions, 2166 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-20 15:53:45,175 INFO L231 Difference]: Finished difference. Result has 190 places, 167 transitions, 1812 flow [2024-06-20 15:53:45,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1736, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1812, PETRI_PLACES=190, PETRI_TRANSITIONS=167} [2024-06-20 15:53:45,176 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 161 predicate places. [2024-06-20 15:53:45,176 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 167 transitions, 1812 flow [2024-06-20 15:53:45,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:45,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:45,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:45,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 15:53:45,176 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:45,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:45,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1683765032, now seen corresponding path program 5 times [2024-06-20 15:53:45,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:45,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527607164] [2024-06-20 15:53:45,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:45,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:45,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:46,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:46,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:46,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527607164] [2024-06-20 15:53:46,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527607164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:46,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:46,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:46,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704887747] [2024-06-20 15:53:46,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:46,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:46,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:46,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:46,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:46,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:46,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 167 transitions, 1812 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:46,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:46,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:46,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:46,421 INFO L124 PetriNetUnfolderBase]: 363/701 cut-off events. [2024-06-20 15:53:46,421 INFO L125 PetriNetUnfolderBase]: For 24579/24579 co-relation queries the response was YES. [2024-06-20 15:53:46,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4621 conditions, 701 events. 363/701 cut-off events. For 24579/24579 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 3599 event pairs, 40 based on Foata normal form. 2/703 useless extension candidates. Maximal degree in co-relation 4532. Up to 598 conditions per place. [2024-06-20 15:53:46,425 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 162 selfloop transitions, 20 changer transitions 0/185 dead transitions. [2024-06-20 15:53:46,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 185 transitions, 2244 flow [2024-06-20 15:53:46,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:53:46,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:53:46,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2024-06-20 15:53:46,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4033333333333333 [2024-06-20 15:53:46,426 INFO L175 Difference]: Start difference. First operand has 190 places, 167 transitions, 1812 flow. Second operand 10 states and 121 transitions. [2024-06-20 15:53:46,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 185 transitions, 2244 flow [2024-06-20 15:53:46,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 185 transitions, 2178 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-20 15:53:46,475 INFO L231 Difference]: Finished difference. Result has 192 places, 168 transitions, 1816 flow [2024-06-20 15:53:46,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1746, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1816, PETRI_PLACES=192, PETRI_TRANSITIONS=168} [2024-06-20 15:53:46,476 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 163 predicate places. [2024-06-20 15:53:46,476 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 168 transitions, 1816 flow [2024-06-20 15:53:46,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:46,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:46,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:46,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 15:53:46,476 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:46,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:46,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1772478662, now seen corresponding path program 6 times [2024-06-20 15:53:46,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:46,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047809085] [2024-06-20 15:53:46,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:46,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:46,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:47,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:47,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:47,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047809085] [2024-06-20 15:53:47,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047809085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:47,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:47,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:47,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122371673] [2024-06-20 15:53:47,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:47,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:47,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:47,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:47,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:47,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:47,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 168 transitions, 1816 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:47,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:47,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:47,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:47,850 INFO L124 PetriNetUnfolderBase]: 367/709 cut-off events. [2024-06-20 15:53:47,850 INFO L125 PetriNetUnfolderBase]: For 25549/25549 co-relation queries the response was YES. [2024-06-20 15:53:47,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4661 conditions, 709 events. 367/709 cut-off events. For 25549/25549 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 3653 event pairs, 46 based on Foata normal form. 2/711 useless extension candidates. Maximal degree in co-relation 4571. Up to 620 conditions per place. [2024-06-20 15:53:47,855 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 158 selfloop transitions, 22 changer transitions 0/183 dead transitions. [2024-06-20 15:53:47,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 183 transitions, 2238 flow [2024-06-20 15:53:47,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:53:47,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:53:47,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-06-20 15:53:47,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 15:53:47,856 INFO L175 Difference]: Start difference. First operand has 192 places, 168 transitions, 1816 flow. Second operand 10 states and 120 transitions. [2024-06-20 15:53:47,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 183 transitions, 2238 flow [2024-06-20 15:53:47,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 183 transitions, 2178 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-20 15:53:47,909 INFO L231 Difference]: Finished difference. Result has 194 places, 169 transitions, 1832 flow [2024-06-20 15:53:47,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1756, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1832, PETRI_PLACES=194, PETRI_TRANSITIONS=169} [2024-06-20 15:53:47,910 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 165 predicate places. [2024-06-20 15:53:47,910 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 169 transitions, 1832 flow [2024-06-20 15:53:47,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:47,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:47,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:47,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 15:53:47,911 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:47,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:47,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1685638982, now seen corresponding path program 7 times [2024-06-20 15:53:47,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:47,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469034632] [2024-06-20 15:53:47,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:47,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:47,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:48,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:48,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:48,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469034632] [2024-06-20 15:53:48,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469034632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:48,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:48,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:48,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560529445] [2024-06-20 15:53:48,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:48,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:48,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:48,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:48,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:48,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:48,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 169 transitions, 1832 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:48,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:48,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:48,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:49,243 INFO L124 PetriNetUnfolderBase]: 371/717 cut-off events. [2024-06-20 15:53:49,243 INFO L125 PetriNetUnfolderBase]: For 26681/26681 co-relation queries the response was YES. [2024-06-20 15:53:49,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4718 conditions, 717 events. 371/717 cut-off events. For 26681/26681 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 3709 event pairs, 44 based on Foata normal form. 2/719 useless extension candidates. Maximal degree in co-relation 4627. Up to 623 conditions per place. [2024-06-20 15:53:49,250 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 161 selfloop transitions, 21 changer transitions 0/185 dead transitions. [2024-06-20 15:53:49,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 185 transitions, 2262 flow [2024-06-20 15:53:49,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:53:49,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:53:49,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-06-20 15:53:49,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 15:53:49,255 INFO L175 Difference]: Start difference. First operand has 194 places, 169 transitions, 1832 flow. Second operand 10 states and 120 transitions. [2024-06-20 15:53:49,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 185 transitions, 2262 flow [2024-06-20 15:53:49,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 185 transitions, 2196 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-20 15:53:49,307 INFO L231 Difference]: Finished difference. Result has 196 places, 170 transitions, 1842 flow [2024-06-20 15:53:49,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1766, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1842, PETRI_PLACES=196, PETRI_TRANSITIONS=170} [2024-06-20 15:53:49,307 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 167 predicate places. [2024-06-20 15:53:49,307 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 170 transitions, 1842 flow [2024-06-20 15:53:49,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:49,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:49,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:49,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 15:53:49,308 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:49,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:49,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1056900016, now seen corresponding path program 8 times [2024-06-20 15:53:49,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:49,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871176740] [2024-06-20 15:53:49,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:49,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:49,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:50,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:50,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:50,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871176740] [2024-06-20 15:53:50,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871176740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:50,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:50,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:50,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580003763] [2024-06-20 15:53:50,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:50,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:50,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:50,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:50,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:50,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:50,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 170 transitions, 1842 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:50,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:50,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:50,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:51,053 INFO L124 PetriNetUnfolderBase]: 375/725 cut-off events. [2024-06-20 15:53:51,053 INFO L125 PetriNetUnfolderBase]: For 27733/27733 co-relation queries the response was YES. [2024-06-20 15:53:51,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4773 conditions, 725 events. 375/725 cut-off events. For 27733/27733 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 3780 event pairs, 74 based on Foata normal form. 2/727 useless extension candidates. Maximal degree in co-relation 4681. Up to 643 conditions per place. [2024-06-20 15:53:51,058 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 161 selfloop transitions, 20 changer transitions 0/184 dead transitions. [2024-06-20 15:53:51,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 184 transitions, 2266 flow [2024-06-20 15:53:51,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:53:51,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:53:51,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-20 15:53:51,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39666666666666667 [2024-06-20 15:53:51,059 INFO L175 Difference]: Start difference. First operand has 196 places, 170 transitions, 1842 flow. Second operand 10 states and 119 transitions. [2024-06-20 15:53:51,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 184 transitions, 2266 flow [2024-06-20 15:53:51,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 184 transitions, 2200 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-20 15:53:51,118 INFO L231 Difference]: Finished difference. Result has 198 places, 171 transitions, 1852 flow [2024-06-20 15:53:51,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1776, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1852, PETRI_PLACES=198, PETRI_TRANSITIONS=171} [2024-06-20 15:53:51,118 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 169 predicate places. [2024-06-20 15:53:51,119 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 171 transitions, 1852 flow [2024-06-20 15:53:51,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:51,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:51,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:51,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 15:53:51,119 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:51,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:51,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1051393486, now seen corresponding path program 9 times [2024-06-20 15:53:51,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:51,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595622394] [2024-06-20 15:53:51,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:51,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:51,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:51,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:51,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595622394] [2024-06-20 15:53:51,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595622394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:51,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:51,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:51,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077705979] [2024-06-20 15:53:51,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:51,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:51,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:51,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:51,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:52,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:52,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 171 transitions, 1852 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:52,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:52,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:52,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:52,361 INFO L124 PetriNetUnfolderBase]: 379/733 cut-off events. [2024-06-20 15:53:52,361 INFO L125 PetriNetUnfolderBase]: For 28786/28786 co-relation queries the response was YES. [2024-06-20 15:53:52,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4827 conditions, 733 events. 379/733 cut-off events. For 28786/28786 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 3831 event pairs, 76 based on Foata normal form. 2/735 useless extension candidates. Maximal degree in co-relation 4734. Up to 657 conditions per place. [2024-06-20 15:53:52,366 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 165 selfloop transitions, 18 changer transitions 0/186 dead transitions. [2024-06-20 15:53:52,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 186 transitions, 2300 flow [2024-06-20 15:53:52,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:53:52,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:53:52,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-20 15:53:52,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39 [2024-06-20 15:53:52,367 INFO L175 Difference]: Start difference. First operand has 198 places, 171 transitions, 1852 flow. Second operand 10 states and 117 transitions. [2024-06-20 15:53:52,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 186 transitions, 2300 flow [2024-06-20 15:53:52,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 186 transitions, 2232 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-20 15:53:52,430 INFO L231 Difference]: Finished difference. Result has 201 places, 173 transitions, 1881 flow [2024-06-20 15:53:52,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1786, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1881, PETRI_PLACES=201, PETRI_TRANSITIONS=173} [2024-06-20 15:53:52,431 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 172 predicate places. [2024-06-20 15:53:52,431 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 173 transitions, 1881 flow [2024-06-20 15:53:52,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:52,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:52,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:52,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 15:53:52,431 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:52,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:52,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1051389766, now seen corresponding path program 10 times [2024-06-20 15:53:52,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:52,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319416222] [2024-06-20 15:53:52,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:52,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:52,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:53,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:53,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:53,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319416222] [2024-06-20 15:53:53,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319416222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:53,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:53,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:53,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106541974] [2024-06-20 15:53:53,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:53,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:53,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:53,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:53,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:53,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:53,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 173 transitions, 1881 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:53,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:53,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:53,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:53,736 INFO L124 PetriNetUnfolderBase]: 383/741 cut-off events. [2024-06-20 15:53:53,736 INFO L125 PetriNetUnfolderBase]: For 29897/29897 co-relation queries the response was YES. [2024-06-20 15:53:53,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4883 conditions, 741 events. 383/741 cut-off events. For 29897/29897 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 3896 event pairs, 76 based on Foata normal form. 2/743 useless extension candidates. Maximal degree in co-relation 4788. Up to 660 conditions per place. [2024-06-20 15:53:53,742 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 168 selfloop transitions, 17 changer transitions 0/188 dead transitions. [2024-06-20 15:53:53,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 188 transitions, 2319 flow [2024-06-20 15:53:53,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:53:53,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:53:53,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-20 15:53:53,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39 [2024-06-20 15:53:53,743 INFO L175 Difference]: Start difference. First operand has 201 places, 173 transitions, 1881 flow. Second operand 10 states and 117 transitions. [2024-06-20 15:53:53,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 188 transitions, 2319 flow [2024-06-20 15:53:53,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 188 transitions, 2258 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-20 15:53:53,812 INFO L231 Difference]: Finished difference. Result has 204 places, 174 transitions, 1894 flow [2024-06-20 15:53:53,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1820, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1894, PETRI_PLACES=204, PETRI_TRANSITIONS=174} [2024-06-20 15:53:53,812 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 175 predicate places. [2024-06-20 15:53:53,813 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 174 transitions, 1894 flow [2024-06-20 15:53:53,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:53,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:53,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:53,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 15:53:53,813 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:53,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:53,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1761859158, now seen corresponding path program 1 times [2024-06-20 15:53:53,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:53,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651968356] [2024-06-20 15:53:53,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:53,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:53,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:55,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:55,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:55,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651968356] [2024-06-20 15:53:55,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651968356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:55,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:55,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:53:55,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69457079] [2024-06-20 15:53:55,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:55,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:53:55,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:55,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:53:55,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:53:55,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:55,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 174 transitions, 1894 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:53:55,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:55,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:55,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:55,538 INFO L124 PetriNetUnfolderBase]: 386/746 cut-off events. [2024-06-20 15:53:55,538 INFO L125 PetriNetUnfolderBase]: For 29728/29728 co-relation queries the response was YES. [2024-06-20 15:53:55,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4922 conditions, 746 events. 386/746 cut-off events. For 29728/29728 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 3929 event pairs, 78 based on Foata normal form. 1/747 useless extension candidates. Maximal degree in co-relation 4826. Up to 642 conditions per place. [2024-06-20 15:53:55,544 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 155 selfloop transitions, 33 changer transitions 0/191 dead transitions. [2024-06-20 15:53:55,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 191 transitions, 2474 flow [2024-06-20 15:53:55,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:53:55,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:53:55,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-20 15:53:55,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403030303030303 [2024-06-20 15:53:55,545 INFO L175 Difference]: Start difference. First operand has 204 places, 174 transitions, 1894 flow. Second operand 11 states and 133 transitions. [2024-06-20 15:53:55,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 191 transitions, 2474 flow [2024-06-20 15:53:55,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 191 transitions, 2410 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-20 15:53:55,606 INFO L231 Difference]: Finished difference. Result has 207 places, 176 transitions, 1963 flow [2024-06-20 15:53:55,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1830, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1963, PETRI_PLACES=207, PETRI_TRANSITIONS=176} [2024-06-20 15:53:55,607 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 178 predicate places. [2024-06-20 15:53:55,607 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 176 transitions, 1963 flow [2024-06-20 15:53:55,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:53:55,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:55,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:55,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 15:53:55,607 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:55,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:55,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1057115497, now seen corresponding path program 1 times [2024-06-20 15:53:55,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:55,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857958709] [2024-06-20 15:53:55,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:55,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:55,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:56,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:56,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:56,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857958709] [2024-06-20 15:53:56,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857958709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:56,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:56,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:56,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861118528] [2024-06-20 15:53:56,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:56,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:56,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:56,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:56,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:56,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:56,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 176 transitions, 1963 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-20 15:53:56,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:56,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:56,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:56,899 INFO L124 PetriNetUnfolderBase]: 406/790 cut-off events. [2024-06-20 15:53:56,899 INFO L125 PetriNetUnfolderBase]: For 44891/44891 co-relation queries the response was YES. [2024-06-20 15:53:56,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5213 conditions, 790 events. 406/790 cut-off events. For 44891/44891 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 4229 event pairs, 82 based on Foata normal form. 12/802 useless extension candidates. Maximal degree in co-relation 5116. Up to 657 conditions per place. [2024-06-20 15:53:56,905 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 164 selfloop transitions, 21 changer transitions 7/195 dead transitions. [2024-06-20 15:53:56,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 195 transitions, 2499 flow [2024-06-20 15:53:56,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:53:56,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:53:56,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-20 15:53:56,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 15:53:56,906 INFO L175 Difference]: Start difference. First operand has 207 places, 176 transitions, 1963 flow. Second operand 10 states and 125 transitions. [2024-06-20 15:53:56,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 195 transitions, 2499 flow [2024-06-20 15:53:56,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 195 transitions, 2385 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-20 15:53:56,982 INFO L231 Difference]: Finished difference. Result has 208 places, 174 transitions, 1871 flow [2024-06-20 15:53:56,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1849, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1871, PETRI_PLACES=208, PETRI_TRANSITIONS=174} [2024-06-20 15:53:56,983 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 179 predicate places. [2024-06-20 15:53:56,983 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 174 transitions, 1871 flow [2024-06-20 15:53:56,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-20 15:53:56,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:56,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:56,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 15:53:56,983 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:56,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:56,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1601184124, now seen corresponding path program 2 times [2024-06-20 15:53:56,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:56,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491713261] [2024-06-20 15:53:56,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:56,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:56,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:58,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:58,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:58,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491713261] [2024-06-20 15:53:58,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491713261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:58,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:58,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:53:58,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256681661] [2024-06-20 15:53:58,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:58,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:53:58,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:58,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:53:58,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:53:58,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:58,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 174 transitions, 1871 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:53:58,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:58,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:58,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:58,580 INFO L124 PetriNetUnfolderBase]: 380/739 cut-off events. [2024-06-20 15:53:58,580 INFO L125 PetriNetUnfolderBase]: For 29675/29675 co-relation queries the response was YES. [2024-06-20 15:53:58,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4751 conditions, 739 events. 380/739 cut-off events. For 29675/29675 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 3928 event pairs, 78 based on Foata normal form. 1/740 useless extension candidates. Maximal degree in co-relation 4653. Up to 651 conditions per place. [2024-06-20 15:53:58,585 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 159 selfloop transitions, 26 changer transitions 0/188 dead transitions. [2024-06-20 15:53:58,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 188 transitions, 2279 flow [2024-06-20 15:53:58,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:53:58,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:53:58,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-06-20 15:53:58,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396969696969697 [2024-06-20 15:53:58,587 INFO L175 Difference]: Start difference. First operand has 208 places, 174 transitions, 1871 flow. Second operand 11 states and 131 transitions. [2024-06-20 15:53:58,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 188 transitions, 2279 flow [2024-06-20 15:53:58,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 188 transitions, 2179 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-20 15:53:58,663 INFO L231 Difference]: Finished difference. Result has 212 places, 175 transitions, 1842 flow [2024-06-20 15:53:58,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1771, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1842, PETRI_PLACES=212, PETRI_TRANSITIONS=175} [2024-06-20 15:53:58,663 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 183 predicate places. [2024-06-20 15:53:58,663 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 175 transitions, 1842 flow [2024-06-20 15:53:58,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:53:58,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:58,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:58,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 15:53:58,664 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:58,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:58,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1581656472, now seen corresponding path program 11 times [2024-06-20 15:53:58,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:58,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916909676] [2024-06-20 15:53:58,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:58,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:58,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:59,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:59,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:59,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916909676] [2024-06-20 15:53:59,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916909676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:59,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:59,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:59,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016108158] [2024-06-20 15:53:59,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:59,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:59,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:59,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:59,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:59,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:53:59,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 175 transitions, 1842 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:59,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:59,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:53:59,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:00,029 INFO L124 PetriNetUnfolderBase]: 384/747 cut-off events. [2024-06-20 15:54:00,029 INFO L125 PetriNetUnfolderBase]: For 31944/31944 co-relation queries the response was YES. [2024-06-20 15:54:00,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4798 conditions, 747 events. 384/747 cut-off events. For 31944/31944 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 3970 event pairs, 63 based on Foata normal form. 2/749 useless extension candidates. Maximal degree in co-relation 4698. Up to 619 conditions per place. [2024-06-20 15:54:00,035 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 158 selfloop transitions, 29 changer transitions 0/190 dead transitions. [2024-06-20 15:54:00,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 190 transitions, 2286 flow [2024-06-20 15:54:00,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:54:00,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:54:00,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-06-20 15:54:00,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40370370370370373 [2024-06-20 15:54:00,036 INFO L175 Difference]: Start difference. First operand has 212 places, 175 transitions, 1842 flow. Second operand 9 states and 109 transitions. [2024-06-20 15:54:00,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 190 transitions, 2286 flow [2024-06-20 15:54:00,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 190 transitions, 2190 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-20 15:54:00,104 INFO L231 Difference]: Finished difference. Result has 212 places, 176 transitions, 1850 flow [2024-06-20 15:54:00,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1746, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1850, PETRI_PLACES=212, PETRI_TRANSITIONS=176} [2024-06-20 15:54:00,105 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 183 predicate places. [2024-06-20 15:54:00,105 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 176 transitions, 1850 flow [2024-06-20 15:54:00,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:00,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:00,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:00,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 15:54:00,105 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:00,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:00,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1282572996, now seen corresponding path program 12 times [2024-06-20 15:54:00,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:00,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921510087] [2024-06-20 15:54:00,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:00,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:00,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:00,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:00,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:00,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921510087] [2024-06-20 15:54:00,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921510087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:00,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:00,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:54:00,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211248914] [2024-06-20 15:54:00,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:00,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:54:00,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:00,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:54:00,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:54:01,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:54:01,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 176 transitions, 1850 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:01,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:01,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:54:01,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:01,331 INFO L124 PetriNetUnfolderBase]: 388/755 cut-off events. [2024-06-20 15:54:01,331 INFO L125 PetriNetUnfolderBase]: For 31382/31382 co-relation queries the response was YES. [2024-06-20 15:54:01,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4838 conditions, 755 events. 388/755 cut-off events. For 31382/31382 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 4020 event pairs, 71 based on Foata normal form. 2/757 useless extension candidates. Maximal degree in co-relation 4737. Up to 642 conditions per place. [2024-06-20 15:54:01,337 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 155 selfloop transitions, 32 changer transitions 0/190 dead transitions. [2024-06-20 15:54:01,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 190 transitions, 2294 flow [2024-06-20 15:54:01,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:54:01,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:54:01,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-06-20 15:54:01,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40370370370370373 [2024-06-20 15:54:01,338 INFO L175 Difference]: Start difference. First operand has 212 places, 176 transitions, 1850 flow. Second operand 9 states and 109 transitions. [2024-06-20 15:54:01,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 190 transitions, 2294 flow [2024-06-20 15:54:01,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 190 transitions, 2200 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-20 15:54:01,412 INFO L231 Difference]: Finished difference. Result has 214 places, 177 transitions, 1868 flow [2024-06-20 15:54:01,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1760, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1868, PETRI_PLACES=214, PETRI_TRANSITIONS=177} [2024-06-20 15:54:01,413 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 185 predicate places. [2024-06-20 15:54:01,413 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 177 transitions, 1868 flow [2024-06-20 15:54:01,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:01,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:01,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:01,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 15:54:01,413 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:01,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:01,414 INFO L85 PathProgramCache]: Analyzing trace with hash 2053328542, now seen corresponding path program 13 times [2024-06-20 15:54:01,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:01,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894303488] [2024-06-20 15:54:01,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:01,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:01,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:02,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:02,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:02,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894303488] [2024-06-20 15:54:02,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894303488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:02,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:02,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:54:02,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349318194] [2024-06-20 15:54:02,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:02,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:54:02,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:02,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:54:02,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:54:02,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:54:02,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 177 transitions, 1868 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:02,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:02,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:54:02,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:02,636 INFO L124 PetriNetUnfolderBase]: 392/763 cut-off events. [2024-06-20 15:54:02,636 INFO L125 PetriNetUnfolderBase]: For 30317/30317 co-relation queries the response was YES. [2024-06-20 15:54:02,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4856 conditions, 763 events. 392/763 cut-off events. For 30317/30317 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 4081 event pairs, 37 based on Foata normal form. 2/765 useless extension candidates. Maximal degree in co-relation 4754. Up to 577 conditions per place. [2024-06-20 15:54:02,642 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 161 selfloop transitions, 29 changer transitions 0/193 dead transitions. [2024-06-20 15:54:02,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 193 transitions, 2320 flow [2024-06-20 15:54:02,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:54:02,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:54:02,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 108 transitions. [2024-06-20 15:54:02,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 15:54:02,643 INFO L175 Difference]: Start difference. First operand has 214 places, 177 transitions, 1868 flow. Second operand 9 states and 108 transitions. [2024-06-20 15:54:02,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 193 transitions, 2320 flow [2024-06-20 15:54:02,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 193 transitions, 2222 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-20 15:54:02,714 INFO L231 Difference]: Finished difference. Result has 216 places, 178 transitions, 1876 flow [2024-06-20 15:54:02,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1774, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1876, PETRI_PLACES=216, PETRI_TRANSITIONS=178} [2024-06-20 15:54:02,714 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 187 predicate places. [2024-06-20 15:54:02,714 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 178 transitions, 1876 flow [2024-06-20 15:54:02,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:02,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:02,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:02,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 15:54:02,715 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:02,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:02,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1761947944, now seen corresponding path program 14 times [2024-06-20 15:54:02,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:02,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956009938] [2024-06-20 15:54:02,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:02,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:02,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:03,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:03,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:03,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956009938] [2024-06-20 15:54:03,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956009938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:03,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:03,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:54:03,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138997644] [2024-06-20 15:54:03,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:03,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:54:03,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:03,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:54:03,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:54:03,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:54:03,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 178 transitions, 1876 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:03,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:03,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:54:03,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:04,099 INFO L124 PetriNetUnfolderBase]: 396/771 cut-off events. [2024-06-20 15:54:04,099 INFO L125 PetriNetUnfolderBase]: For 29182/29182 co-relation queries the response was YES. [2024-06-20 15:54:04,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4884 conditions, 771 events. 396/771 cut-off events. For 29182/29182 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 4138 event pairs, 80 based on Foata normal form. 2/773 useless extension candidates. Maximal degree in co-relation 4781. Up to 668 conditions per place. [2024-06-20 15:54:04,104 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 159 selfloop transitions, 28 changer transitions 0/190 dead transitions. [2024-06-20 15:54:04,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 190 transitions, 2310 flow [2024-06-20 15:54:04,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:54:04,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:54:04,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 108 transitions. [2024-06-20 15:54:04,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 15:54:04,105 INFO L175 Difference]: Start difference. First operand has 216 places, 178 transitions, 1876 flow. Second operand 9 states and 108 transitions. [2024-06-20 15:54:04,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 190 transitions, 2310 flow [2024-06-20 15:54:04,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 190 transitions, 2218 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-20 15:54:04,172 INFO L231 Difference]: Finished difference. Result has 218 places, 179 transitions, 1882 flow [2024-06-20 15:54:04,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1790, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1882, PETRI_PLACES=218, PETRI_TRANSITIONS=179} [2024-06-20 15:54:04,173 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 189 predicate places. [2024-06-20 15:54:04,173 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 179 transitions, 1882 flow [2024-06-20 15:54:04,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:04,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:04,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:04,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 15:54:04,173 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:04,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:04,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1756585564, now seen corresponding path program 15 times [2024-06-20 15:54:04,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:04,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839919668] [2024-06-20 15:54:04,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:04,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:04,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:05,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:05,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839919668] [2024-06-20 15:54:05,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839919668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:05,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:05,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:54:05,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930007229] [2024-06-20 15:54:05,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:05,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:54:05,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:05,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:54:05,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:54:05,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:54:05,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 179 transitions, 1882 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:05,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:05,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:54:05,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:05,578 INFO L124 PetriNetUnfolderBase]: 400/779 cut-off events. [2024-06-20 15:54:05,578 INFO L125 PetriNetUnfolderBase]: For 27047/27047 co-relation queries the response was YES. [2024-06-20 15:54:05,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4852 conditions, 779 events. 400/779 cut-off events. For 27047/27047 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 4202 event pairs, 82 based on Foata normal form. 2/781 useless extension candidates. Maximal degree in co-relation 4748. Up to 688 conditions per place. [2024-06-20 15:54:05,584 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 166 selfloop transitions, 23 changer transitions 0/192 dead transitions. [2024-06-20 15:54:05,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 192 transitions, 2330 flow [2024-06-20 15:54:05,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:54:05,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:54:05,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2024-06-20 15:54:05,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3925925925925926 [2024-06-20 15:54:05,585 INFO L175 Difference]: Start difference. First operand has 218 places, 179 transitions, 1882 flow. Second operand 9 states and 106 transitions. [2024-06-20 15:54:05,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 192 transitions, 2330 flow [2024-06-20 15:54:05,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 192 transitions, 2246 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-20 15:54:05,650 INFO L231 Difference]: Finished difference. Result has 221 places, 181 transitions, 1903 flow [2024-06-20 15:54:05,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1802, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1903, PETRI_PLACES=221, PETRI_TRANSITIONS=181} [2024-06-20 15:54:05,650 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 192 predicate places. [2024-06-20 15:54:05,650 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 181 transitions, 1903 flow [2024-06-20 15:54:05,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:05,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:05,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:05,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 15:54:05,651 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:05,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:05,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1756437694, now seen corresponding path program 16 times [2024-06-20 15:54:05,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:05,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973264423] [2024-06-20 15:54:05,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:05,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:05,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:06,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:06,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:06,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973264423] [2024-06-20 15:54:06,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973264423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:06,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:06,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:54:06,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673972279] [2024-06-20 15:54:06,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:06,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:54:06,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:06,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:54:06,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:54:06,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:54:06,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 181 transitions, 1903 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:06,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:06,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:54:06,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:06,962 INFO L124 PetriNetUnfolderBase]: 404/787 cut-off events. [2024-06-20 15:54:06,963 INFO L125 PetriNetUnfolderBase]: For 27051/27051 co-relation queries the response was YES. [2024-06-20 15:54:06,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4882 conditions, 787 events. 404/787 cut-off events. For 27051/27051 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 4265 event pairs, 78 based on Foata normal form. 2/789 useless extension candidates. Maximal degree in co-relation 4776. Up to 686 conditions per place. [2024-06-20 15:54:06,968 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 169 selfloop transitions, 22 changer transitions 0/194 dead transitions. [2024-06-20 15:54:06,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 194 transitions, 2343 flow [2024-06-20 15:54:06,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:54:06,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:54:06,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2024-06-20 15:54:06,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3925925925925926 [2024-06-20 15:54:06,969 INFO L175 Difference]: Start difference. First operand has 221 places, 181 transitions, 1903 flow. Second operand 9 states and 106 transitions. [2024-06-20 15:54:06,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 194 transitions, 2343 flow [2024-06-20 15:54:07,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 194 transitions, 2276 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 15:54:07,038 INFO L231 Difference]: Finished difference. Result has 224 places, 182 transitions, 1918 flow [2024-06-20 15:54:07,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1838, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1918, PETRI_PLACES=224, PETRI_TRANSITIONS=182} [2024-06-20 15:54:07,038 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 195 predicate places. [2024-06-20 15:54:07,039 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 182 transitions, 1918 flow [2024-06-20 15:54:07,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:07,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:07,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:07,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 15:54:07,039 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:07,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:07,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1426469478, now seen corresponding path program 3 times [2024-06-20 15:54:07,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:07,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692856012] [2024-06-20 15:54:07,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:07,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:07,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:08,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:08,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:08,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692856012] [2024-06-20 15:54:08,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692856012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:08,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:08,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:54:08,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135669508] [2024-06-20 15:54:08,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:08,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:54:08,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:08,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:54:08,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:54:08,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:54:08,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 182 transitions, 1918 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:08,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:08,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:54:08,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:08,929 INFO L124 PetriNetUnfolderBase]: 407/791 cut-off events. [2024-06-20 15:54:08,930 INFO L125 PetriNetUnfolderBase]: For 25874/25874 co-relation queries the response was YES. [2024-06-20 15:54:08,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4912 conditions, 791 events. 407/791 cut-off events. For 25874/25874 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 4263 event pairs, 56 based on Foata normal form. 1/792 useless extension candidates. Maximal degree in co-relation 4805. Up to 600 conditions per place. [2024-06-20 15:54:08,935 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 123 selfloop transitions, 71 changer transitions 0/197 dead transitions. [2024-06-20 15:54:08,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 197 transitions, 2508 flow [2024-06-20 15:54:08,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:54:08,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:54:08,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-20 15:54:08,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41333333333333333 [2024-06-20 15:54:08,936 INFO L175 Difference]: Start difference. First operand has 224 places, 182 transitions, 1918 flow. Second operand 10 states and 124 transitions. [2024-06-20 15:54:08,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 197 transitions, 2508 flow [2024-06-20 15:54:09,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 197 transitions, 2438 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-20 15:54:09,007 INFO L231 Difference]: Finished difference. Result has 227 places, 184 transitions, 2058 flow [2024-06-20 15:54:09,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1850, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2058, PETRI_PLACES=227, PETRI_TRANSITIONS=184} [2024-06-20 15:54:09,008 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 198 predicate places. [2024-06-20 15:54:09,008 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 184 transitions, 2058 flow [2024-06-20 15:54:09,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:09,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:09,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:09,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 15:54:09,009 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:09,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:09,009 INFO L85 PathProgramCache]: Analyzing trace with hash 490126260, now seen corresponding path program 4 times [2024-06-20 15:54:09,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:09,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967208034] [2024-06-20 15:54:09,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:09,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:09,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:10,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:10,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:10,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967208034] [2024-06-20 15:54:10,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967208034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:10,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:10,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:54:10,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486588942] [2024-06-20 15:54:10,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:10,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:54:10,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:10,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:54:10,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:54:10,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:54:10,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 184 transitions, 2058 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:10,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:10,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:54:10,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:11,252 INFO L124 PetriNetUnfolderBase]: 405/789 cut-off events. [2024-06-20 15:54:11,252 INFO L125 PetriNetUnfolderBase]: For 24597/24597 co-relation queries the response was YES. [2024-06-20 15:54:11,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4893 conditions, 789 events. 405/789 cut-off events. For 24597/24597 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 4269 event pairs, 82 based on Foata normal form. 1/790 useless extension candidates. Maximal degree in co-relation 4785. Up to 671 conditions per place. [2024-06-20 15:54:11,258 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 150 selfloop transitions, 42 changer transitions 0/195 dead transitions. [2024-06-20 15:54:11,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 195 transitions, 2468 flow [2024-06-20 15:54:11,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:54:11,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:54:11,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-20 15:54:11,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39666666666666667 [2024-06-20 15:54:11,259 INFO L175 Difference]: Start difference. First operand has 227 places, 184 transitions, 2058 flow. Second operand 10 states and 119 transitions. [2024-06-20 15:54:11,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 195 transitions, 2468 flow [2024-06-20 15:54:11,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 195 transitions, 2281 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-20 15:54:11,336 INFO L231 Difference]: Finished difference. Result has 229 places, 184 transitions, 1963 flow [2024-06-20 15:54:11,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1871, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1963, PETRI_PLACES=229, PETRI_TRANSITIONS=184} [2024-06-20 15:54:11,337 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 200 predicate places. [2024-06-20 15:54:11,337 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 184 transitions, 1963 flow [2024-06-20 15:54:11,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:11,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:11,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:11,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 15:54:11,337 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:11,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:11,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1426679007, now seen corresponding path program 2 times [2024-06-20 15:54:11,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:11,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416304924] [2024-06-20 15:54:11,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:11,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:11,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:12,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:12,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:12,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416304924] [2024-06-20 15:54:12,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416304924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:12,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:12,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:54:12,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745268152] [2024-06-20 15:54:12,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:12,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:54:12,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:12,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:54:12,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:54:12,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:54:12,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 184 transitions, 1963 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-20 15:54:12,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:12,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:54:12,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:12,557 INFO L124 PetriNetUnfolderBase]: 425/833 cut-off events. [2024-06-20 15:54:12,558 INFO L125 PetriNetUnfolderBase]: For 36885/36885 co-relation queries the response was YES. [2024-06-20 15:54:12,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5058 conditions, 833 events. 425/833 cut-off events. For 36885/36885 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 4589 event pairs, 86 based on Foata normal form. 12/845 useless extension candidates. Maximal degree in co-relation 4950. Up to 676 conditions per place. [2024-06-20 15:54:12,563 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 160 selfloop transitions, 30 changer transitions 7/200 dead transitions. [2024-06-20 15:54:12,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 200 transitions, 2491 flow [2024-06-20 15:54:12,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:54:12,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:54:12,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2024-06-20 15:54:12,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-20 15:54:12,565 INFO L175 Difference]: Start difference. First operand has 229 places, 184 transitions, 1963 flow. Second operand 9 states and 114 transitions. [2024-06-20 15:54:12,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 200 transitions, 2491 flow [2024-06-20 15:54:12,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 200 transitions, 2331 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-20 15:54:12,638 INFO L231 Difference]: Finished difference. Result has 227 places, 182 transitions, 1860 flow [2024-06-20 15:54:12,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1803, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1860, PETRI_PLACES=227, PETRI_TRANSITIONS=182} [2024-06-20 15:54:12,639 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 198 predicate places. [2024-06-20 15:54:12,639 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 182 transitions, 1860 flow [2024-06-20 15:54:12,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-20 15:54:12,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:12,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:12,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 15:54:12,639 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:12,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:12,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1105138346, now seen corresponding path program 17 times [2024-06-20 15:54:12,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:12,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636795490] [2024-06-20 15:54:12,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:12,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:13,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:13,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:13,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636795490] [2024-06-20 15:54:13,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636795490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:13,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:13,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:54:13,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898987374] [2024-06-20 15:54:13,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:13,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:54:13,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:13,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:54:13,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:54:13,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:54:13,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 182 transitions, 1860 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:13,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:13,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:54:13,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:13,947 INFO L124 PetriNetUnfolderBase]: 405/793 cut-off events. [2024-06-20 15:54:13,947 INFO L125 PetriNetUnfolderBase]: For 25526/25526 co-relation queries the response was YES. [2024-06-20 15:54:13,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4768 conditions, 793 events. 405/793 cut-off events. For 25526/25526 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 4333 event pairs, 87 based on Foata normal form. 2/795 useless extension candidates. Maximal degree in co-relation 4660. Up to 702 conditions per place. [2024-06-20 15:54:13,952 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 167 selfloop transitions, 23 changer transitions 0/193 dead transitions. [2024-06-20 15:54:13,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 193 transitions, 2296 flow [2024-06-20 15:54:13,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:54:13,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:54:13,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2024-06-20 15:54:13,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3925925925925926 [2024-06-20 15:54:13,953 INFO L175 Difference]: Start difference. First operand has 227 places, 182 transitions, 1860 flow. Second operand 9 states and 106 transitions. [2024-06-20 15:54:13,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 193 transitions, 2296 flow [2024-06-20 15:54:14,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 193 transitions, 2214 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-20 15:54:14,024 INFO L231 Difference]: Finished difference. Result has 230 places, 184 transitions, 1871 flow [2024-06-20 15:54:14,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1778, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1871, PETRI_PLACES=230, PETRI_TRANSITIONS=184} [2024-06-20 15:54:14,025 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 201 predicate places. [2024-06-20 15:54:14,025 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 184 transitions, 1871 flow [2024-06-20 15:54:14,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:14,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:14,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:14,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 15:54:14,025 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:14,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:14,026 INFO L85 PathProgramCache]: Analyzing trace with hash -24323508, now seen corresponding path program 18 times [2024-06-20 15:54:14,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:14,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745809397] [2024-06-20 15:54:14,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:14,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:14,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:15,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:15,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:15,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745809397] [2024-06-20 15:54:15,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745809397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:15,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:15,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:54:15,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852461987] [2024-06-20 15:54:15,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:15,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:54:15,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:15,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:54:15,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:54:15,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:54:15,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 184 transitions, 1871 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:15,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:15,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:54:15,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:15,358 INFO L124 PetriNetUnfolderBase]: 409/801 cut-off events. [2024-06-20 15:54:15,359 INFO L125 PetriNetUnfolderBase]: For 25677/25677 co-relation queries the response was YES. [2024-06-20 15:54:15,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4795 conditions, 801 events. 409/801 cut-off events. For 25677/25677 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 4376 event pairs, 85 based on Foata normal form. 2/803 useless extension candidates. Maximal degree in co-relation 4685. Up to 705 conditions per place. [2024-06-20 15:54:15,365 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 170 selfloop transitions, 22 changer transitions 0/195 dead transitions. [2024-06-20 15:54:15,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 195 transitions, 2307 flow [2024-06-20 15:54:15,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:54:15,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:54:15,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2024-06-20 15:54:15,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3925925925925926 [2024-06-20 15:54:15,365 INFO L175 Difference]: Start difference. First operand has 230 places, 184 transitions, 1871 flow. Second operand 9 states and 106 transitions. [2024-06-20 15:54:15,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 195 transitions, 2307 flow [2024-06-20 15:54:15,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 195 transitions, 2240 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-20 15:54:15,440 INFO L231 Difference]: Finished difference. Result has 233 places, 185 transitions, 1884 flow [2024-06-20 15:54:15,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1804, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1884, PETRI_PLACES=233, PETRI_TRANSITIONS=185} [2024-06-20 15:54:15,441 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 204 predicate places. [2024-06-20 15:54:15,441 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 185 transitions, 1884 flow [2024-06-20 15:54:15,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:15,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:15,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:15,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 15:54:15,441 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:15,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:15,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1670192388, now seen corresponding path program 19 times [2024-06-20 15:54:15,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:15,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609106977] [2024-06-20 15:54:15,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:15,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:15,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:16,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:16,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:16,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609106977] [2024-06-20 15:54:16,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609106977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:16,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:16,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:54:16,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719494445] [2024-06-20 15:54:16,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:16,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:54:16,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:16,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:54:16,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:54:16,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:54:16,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 185 transitions, 1884 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:16,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:16,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:54:16,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:17,147 INFO L124 PetriNetUnfolderBase]: 413/809 cut-off events. [2024-06-20 15:54:17,147 INFO L125 PetriNetUnfolderBase]: For 26748/26748 co-relation queries the response was YES. [2024-06-20 15:54:17,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4850 conditions, 809 events. 413/809 cut-off events. For 26748/26748 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 4433 event pairs, 87 based on Foata normal form. 2/811 useless extension candidates. Maximal degree in co-relation 4739. Up to 685 conditions per place. [2024-06-20 15:54:17,153 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 154 selfloop transitions, 38 changer transitions 0/195 dead transitions. [2024-06-20 15:54:17,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 195 transitions, 2320 flow [2024-06-20 15:54:17,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:54:17,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:54:17,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 108 transitions. [2024-06-20 15:54:17,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 15:54:17,153 INFO L175 Difference]: Start difference. First operand has 233 places, 185 transitions, 1884 flow. Second operand 9 states and 108 transitions. [2024-06-20 15:54:17,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 195 transitions, 2320 flow [2024-06-20 15:54:17,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 195 transitions, 2250 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-20 15:54:17,233 INFO L231 Difference]: Finished difference. Result has 235 places, 186 transitions, 1928 flow [2024-06-20 15:54:17,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1814, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1928, PETRI_PLACES=235, PETRI_TRANSITIONS=186} [2024-06-20 15:54:17,234 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 206 predicate places. [2024-06-20 15:54:17,234 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 186 transitions, 1928 flow [2024-06-20 15:54:17,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:17,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:17,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:17,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 15:54:17,234 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:17,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:17,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1099775966, now seen corresponding path program 20 times [2024-06-20 15:54:17,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:17,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950754246] [2024-06-20 15:54:17,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:17,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:17,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:18,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:18,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:18,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950754246] [2024-06-20 15:54:18,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950754246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:18,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:18,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:54:18,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66843081] [2024-06-20 15:54:18,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:18,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:54:18,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:18,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:54:18,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:54:18,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:54:18,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 186 transitions, 1928 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:18,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:18,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:54:18,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:18,689 INFO L124 PetriNetUnfolderBase]: 410/804 cut-off events. [2024-06-20 15:54:18,689 INFO L125 PetriNetUnfolderBase]: For 24779/24779 co-relation queries the response was YES. [2024-06-20 15:54:18,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4711 conditions, 804 events. 410/804 cut-off events. For 24779/24779 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 4430 event pairs, 86 based on Foata normal form. 2/806 useless extension candidates. Maximal degree in co-relation 4599. Up to 707 conditions per place. [2024-06-20 15:54:18,695 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 166 selfloop transitions, 26 changer transitions 0/195 dead transitions. [2024-06-20 15:54:18,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 195 transitions, 2332 flow [2024-06-20 15:54:18,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:54:18,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:54:18,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 108 transitions. [2024-06-20 15:54:18,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 15:54:18,696 INFO L175 Difference]: Start difference. First operand has 235 places, 186 transitions, 1928 flow. Second operand 9 states and 108 transitions. [2024-06-20 15:54:18,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 195 transitions, 2332 flow [2024-06-20 15:54:18,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 195 transitions, 2228 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-20 15:54:18,778 INFO L231 Difference]: Finished difference. Result has 237 places, 186 transitions, 1880 flow [2024-06-20 15:54:18,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1824, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1880, PETRI_PLACES=237, PETRI_TRANSITIONS=186} [2024-06-20 15:54:18,779 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 208 predicate places. [2024-06-20 15:54:18,779 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 186 transitions, 1880 flow [2024-06-20 15:54:18,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:18,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:18,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:18,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 15:54:18,779 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:18,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:18,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1805587336, now seen corresponding path program 5 times [2024-06-20 15:54:18,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:18,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221289794] [2024-06-20 15:54:18,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:18,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:18,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:20,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:20,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:20,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221289794] [2024-06-20 15:54:20,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221289794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:20,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:20,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:54:20,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299756448] [2024-06-20 15:54:20,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:20,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:54:20,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:20,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:54:20,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:54:20,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:54:20,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 186 transitions, 1880 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:20,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:20,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:54:20,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:20,681 INFO L124 PetriNetUnfolderBase]: 413/809 cut-off events. [2024-06-20 15:54:20,681 INFO L125 PetriNetUnfolderBase]: For 24094/24094 co-relation queries the response was YES. [2024-06-20 15:54:20,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4708 conditions, 809 events. 413/809 cut-off events. For 24094/24094 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 4456 event pairs, 86 based on Foata normal form. 1/810 useless extension candidates. Maximal degree in co-relation 4595. Up to 703 conditions per place. [2024-06-20 15:54:20,686 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 161 selfloop transitions, 33 changer transitions 0/197 dead transitions. [2024-06-20 15:54:20,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 197 transitions, 2342 flow [2024-06-20 15:54:20,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:54:20,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:54:20,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-20 15:54:20,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39666666666666667 [2024-06-20 15:54:20,687 INFO L175 Difference]: Start difference. First operand has 237 places, 186 transitions, 1880 flow. Second operand 10 states and 119 transitions. [2024-06-20 15:54:20,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 197 transitions, 2342 flow [2024-06-20 15:54:20,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 197 transitions, 2187 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-20 15:54:20,786 INFO L231 Difference]: Finished difference. Result has 238 places, 188 transitions, 1854 flow [2024-06-20 15:54:20,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1725, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1854, PETRI_PLACES=238, PETRI_TRANSITIONS=188} [2024-06-20 15:54:20,787 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 209 predicate places. [2024-06-20 15:54:20,787 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 188 transitions, 1854 flow [2024-06-20 15:54:20,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:20,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:20,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:20,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 15:54:20,787 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:20,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:20,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1805385526, now seen corresponding path program 6 times [2024-06-20 15:54:20,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:20,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401301485] [2024-06-20 15:54:20,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:20,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:20,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:22,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:22,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:22,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401301485] [2024-06-20 15:54:22,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401301485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:22,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:22,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:54:22,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867358634] [2024-06-20 15:54:22,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:22,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:54:22,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:22,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:54:22,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:54:22,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:54:22,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 188 transitions, 1854 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:22,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:22,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:54:22,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:22,578 INFO L124 PetriNetUnfolderBase]: 411/806 cut-off events. [2024-06-20 15:54:22,578 INFO L125 PetriNetUnfolderBase]: For 22931/22931 co-relation queries the response was YES. [2024-06-20 15:54:22,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4498 conditions, 806 events. 411/806 cut-off events. For 22931/22931 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 4417 event pairs, 86 based on Foata normal form. 1/807 useless extension candidates. Maximal degree in co-relation 4385. Up to 700 conditions per place. [2024-06-20 15:54:22,584 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 162 selfloop transitions, 32 changer transitions 0/197 dead transitions. [2024-06-20 15:54:22,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 197 transitions, 2262 flow [2024-06-20 15:54:22,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:54:22,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:54:22,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-06-20 15:54:22,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 15:54:22,585 INFO L175 Difference]: Start difference. First operand has 238 places, 188 transitions, 1854 flow. Second operand 10 states and 120 transitions. [2024-06-20 15:54:22,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 197 transitions, 2262 flow [2024-06-20 15:54:22,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 197 transitions, 2112 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-20 15:54:22,659 INFO L231 Difference]: Finished difference. Result has 240 places, 188 transitions, 1773 flow [2024-06-20 15:54:22,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1704, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1773, PETRI_PLACES=240, PETRI_TRANSITIONS=188} [2024-06-20 15:54:22,660 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 211 predicate places. [2024-06-20 15:54:22,660 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 188 transitions, 1773 flow [2024-06-20 15:54:22,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:22,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:22,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:22,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 15:54:22,660 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:22,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:22,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1692958013, now seen corresponding path program 3 times [2024-06-20 15:54:22,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:22,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001649309] [2024-06-20 15:54:22,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:22,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:22,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:23,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:23,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:23,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001649309] [2024-06-20 15:54:23,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001649309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:23,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:23,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:54:23,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716448858] [2024-06-20 15:54:23,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:23,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:54:23,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:23,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:54:23,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:54:23,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:54:23,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 188 transitions, 1773 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:23,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:23,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:54:23,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:24,068 INFO L124 PetriNetUnfolderBase]: 431/850 cut-off events. [2024-06-20 15:54:24,068 INFO L125 PetriNetUnfolderBase]: For 38982/38982 co-relation queries the response was YES. [2024-06-20 15:54:24,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4714 conditions, 850 events. 431/850 cut-off events. For 38982/38982 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 4717 event pairs, 90 based on Foata normal form. 12/862 useless extension candidates. Maximal degree in co-relation 4600. Up to 702 conditions per place. [2024-06-20 15:54:24,073 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 166 selfloop transitions, 27 changer transitions 7/203 dead transitions. [2024-06-20 15:54:24,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 203 transitions, 2303 flow [2024-06-20 15:54:24,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:54:24,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:54:24,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-20 15:54:24,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41333333333333333 [2024-06-20 15:54:24,074 INFO L175 Difference]: Start difference. First operand has 240 places, 188 transitions, 1773 flow. Second operand 10 states and 124 transitions. [2024-06-20 15:54:24,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 203 transitions, 2303 flow [2024-06-20 15:54:24,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 203 transitions, 2216 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-20 15:54:24,161 INFO L231 Difference]: Finished difference. Result has 241 places, 186 transitions, 1749 flow [2024-06-20 15:54:24,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1686, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1749, PETRI_PLACES=241, PETRI_TRANSITIONS=186} [2024-06-20 15:54:24,161 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 212 predicate places. [2024-06-20 15:54:24,161 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 186 transitions, 1749 flow [2024-06-20 15:54:24,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:24,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:24,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:24,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 15:54:24,161 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:24,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:24,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1999526746, now seen corresponding path program 7 times [2024-06-20 15:54:24,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:24,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477274511] [2024-06-20 15:54:24,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:24,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:24,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:25,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:25,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:25,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477274511] [2024-06-20 15:54:25,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477274511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:25,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:25,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:54:25,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428604478] [2024-06-20 15:54:25,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:25,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:54:25,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:25,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:54:25,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:54:25,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:54:25,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 186 transitions, 1749 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:25,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:25,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:54:25,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:25,914 INFO L124 PetriNetUnfolderBase]: 418/824 cut-off events. [2024-06-20 15:54:25,914 INFO L125 PetriNetUnfolderBase]: For 28486/28486 co-relation queries the response was YES. [2024-06-20 15:54:25,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4722 conditions, 824 events. 418/824 cut-off events. For 28486/28486 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 4588 event pairs, 86 based on Foata normal form. 2/826 useless extension candidates. Maximal degree in co-relation 4607. Up to 594 conditions per place. [2024-06-20 15:54:25,919 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 128 selfloop transitions, 74 changer transitions 0/205 dead transitions. [2024-06-20 15:54:25,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 205 transitions, 2645 flow [2024-06-20 15:54:25,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:54:25,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:54:25,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 129 transitions. [2024-06-20 15:54:25,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43 [2024-06-20 15:54:25,921 INFO L175 Difference]: Start difference. First operand has 241 places, 186 transitions, 1749 flow. Second operand 10 states and 129 transitions. [2024-06-20 15:54:25,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 205 transitions, 2645 flow [2024-06-20 15:54:25,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 205 transitions, 2569 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-20 15:54:25,995 INFO L231 Difference]: Finished difference. Result has 244 places, 194 transitions, 2086 flow [2024-06-20 15:54:25,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1673, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2086, PETRI_PLACES=244, PETRI_TRANSITIONS=194} [2024-06-20 15:54:25,996 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 215 predicate places. [2024-06-20 15:54:25,996 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 194 transitions, 2086 flow [2024-06-20 15:54:25,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:25,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:25,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:25,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 15:54:25,996 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:25,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:25,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1543596719, now seen corresponding path program 4 times [2024-06-20 15:54:25,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:25,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795654463] [2024-06-20 15:54:25,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:25,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:26,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:26,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:26,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:26,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795654463] [2024-06-20 15:54:26,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795654463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:26,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:26,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:54:26,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303514855] [2024-06-20 15:54:26,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:26,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:54:26,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:26,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:54:26,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:54:26,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:54:26,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 194 transitions, 2086 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-20 15:54:26,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:26,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:54:26,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:27,176 INFO L124 PetriNetUnfolderBase]: 422/832 cut-off events. [2024-06-20 15:54:27,176 INFO L125 PetriNetUnfolderBase]: For 30813/30813 co-relation queries the response was YES. [2024-06-20 15:54:27,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4894 conditions, 832 events. 422/832 cut-off events. For 30813/30813 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 4634 event pairs, 86 based on Foata normal form. 2/834 useless extension candidates. Maximal degree in co-relation 4777. Up to 678 conditions per place. [2024-06-20 15:54:27,182 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 155 selfloop transitions, 46 changer transitions 0/204 dead transitions. [2024-06-20 15:54:27,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 204 transitions, 2536 flow [2024-06-20 15:54:27,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:54:27,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:54:27,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 113 transitions. [2024-06-20 15:54:27,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4185185185185185 [2024-06-20 15:54:27,183 INFO L175 Difference]: Start difference. First operand has 244 places, 194 transitions, 2086 flow. Second operand 9 states and 113 transitions. [2024-06-20 15:54:27,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 204 transitions, 2536 flow [2024-06-20 15:54:27,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 204 transitions, 2261 flow, removed 77 selfloop flow, removed 7 redundant places. [2024-06-20 15:54:27,265 INFO L231 Difference]: Finished difference. Result has 246 places, 195 transitions, 1937 flow [2024-06-20 15:54:27,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1811, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1937, PETRI_PLACES=246, PETRI_TRANSITIONS=195} [2024-06-20 15:54:27,266 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 217 predicate places. [2024-06-20 15:54:27,266 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 195 transitions, 1937 flow [2024-06-20 15:54:27,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-20 15:54:27,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:27,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:27,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 15:54:27,266 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:27,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:27,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1999324936, now seen corresponding path program 8 times [2024-06-20 15:54:27,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:27,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527132603] [2024-06-20 15:54:27,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:27,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:28,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:28,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:28,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527132603] [2024-06-20 15:54:28,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527132603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:28,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:28,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:54:28,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358011769] [2024-06-20 15:54:28,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:28,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:54:28,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:28,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:54:28,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:54:28,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:54:28,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 195 transitions, 1937 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:28,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:28,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:54:28,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:29,117 INFO L124 PetriNetUnfolderBase]: 425/837 cut-off events. [2024-06-20 15:54:29,117 INFO L125 PetriNetUnfolderBase]: For 27762/27762 co-relation queries the response was YES. [2024-06-20 15:54:29,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4739 conditions, 837 events. 425/837 cut-off events. For 27762/27762 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 4691 event pairs, 86 based on Foata normal form. 1/838 useless extension candidates. Maximal degree in co-relation 4623. Up to 606 conditions per place. [2024-06-20 15:54:29,123 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 125 selfloop transitions, 80 changer transitions 0/208 dead transitions. [2024-06-20 15:54:29,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 208 transitions, 2651 flow [2024-06-20 15:54:29,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:54:29,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:54:29,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-06-20 15:54:29,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42333333333333334 [2024-06-20 15:54:29,124 INFO L175 Difference]: Start difference. First operand has 246 places, 195 transitions, 1937 flow. Second operand 10 states and 127 transitions. [2024-06-20 15:54:29,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 208 transitions, 2651 flow [2024-06-20 15:54:29,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 208 transitions, 2495 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-20 15:54:29,201 INFO L231 Difference]: Finished difference. Result has 249 places, 197 transitions, 1998 flow [2024-06-20 15:54:29,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1781, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1998, PETRI_PLACES=249, PETRI_TRANSITIONS=197} [2024-06-20 15:54:29,202 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 220 predicate places. [2024-06-20 15:54:29,202 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 197 transitions, 1998 flow [2024-06-20 15:54:29,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:29,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:29,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:29,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 15:54:29,203 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:29,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:29,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1287103928, now seen corresponding path program 9 times [2024-06-20 15:54:29,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:29,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637302391] [2024-06-20 15:54:29,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:29,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:29,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:30,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:30,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:30,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637302391] [2024-06-20 15:54:30,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637302391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:30,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:30,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:54:30,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603956436] [2024-06-20 15:54:30,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:30,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:54:30,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:30,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:54:30,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:54:31,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:54:31,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 197 transitions, 1998 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:31,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:31,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:54:31,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:31,541 INFO L124 PetriNetUnfolderBase]: 421/830 cut-off events. [2024-06-20 15:54:31,541 INFO L125 PetriNetUnfolderBase]: For 26372/26372 co-relation queries the response was YES. [2024-06-20 15:54:31,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4557 conditions, 830 events. 421/830 cut-off events. For 26372/26372 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 4623 event pairs, 125 based on Foata normal form. 2/832 useless extension candidates. Maximal degree in co-relation 4440. Up to 748 conditions per place. [2024-06-20 15:54:31,547 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 182 selfloop transitions, 21 changer transitions 0/206 dead transitions. [2024-06-20 15:54:31,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 206 transitions, 2424 flow [2024-06-20 15:54:31,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:54:31,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:54:31,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-20 15:54:31,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39 [2024-06-20 15:54:31,548 INFO L175 Difference]: Start difference. First operand has 249 places, 197 transitions, 1998 flow. Second operand 10 states and 117 transitions. [2024-06-20 15:54:31,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 206 transitions, 2424 flow [2024-06-20 15:54:31,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 206 transitions, 2208 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-20 15:54:31,616 INFO L231 Difference]: Finished difference. Result has 253 places, 197 transitions, 1837 flow [2024-06-20 15:54:31,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1782, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1837, PETRI_PLACES=253, PETRI_TRANSITIONS=197} [2024-06-20 15:54:31,616 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 224 predicate places. [2024-06-20 15:54:31,616 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 197 transitions, 1837 flow [2024-06-20 15:54:31,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:31,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:31,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:31,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 15:54:31,617 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:31,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:31,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1536446879, now seen corresponding path program 5 times [2024-06-20 15:54:31,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:31,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097236899] [2024-06-20 15:54:31,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:31,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:31,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:32,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:32,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:32,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097236899] [2024-06-20 15:54:32,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097236899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:32,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:32,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:54:32,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693686448] [2024-06-20 15:54:32,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:32,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:54:32,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:32,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:54:32,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:54:32,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:54:32,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 197 transitions, 1837 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:32,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:32,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:54:32,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:33,281 INFO L124 PetriNetUnfolderBase]: 428/843 cut-off events. [2024-06-20 15:54:33,281 INFO L125 PetriNetUnfolderBase]: For 27465/27465 co-relation queries the response was YES. [2024-06-20 15:54:33,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4512 conditions, 843 events. 428/843 cut-off events. For 27465/27465 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 4713 event pairs, 127 based on Foata normal form. 2/845 useless extension candidates. Maximal degree in co-relation 4393. Up to 769 conditions per place. [2024-06-20 15:54:33,287 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 191 selfloop transitions, 16 changer transitions 0/210 dead transitions. [2024-06-20 15:54:33,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 210 transitions, 2325 flow [2024-06-20 15:54:33,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:54:33,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:54:33,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-20 15:54:33,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37666666666666665 [2024-06-20 15:54:33,288 INFO L175 Difference]: Start difference. First operand has 253 places, 197 transitions, 1837 flow. Second operand 10 states and 113 transitions. [2024-06-20 15:54:33,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 210 transitions, 2325 flow [2024-06-20 15:54:33,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 210 transitions, 2197 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-20 15:54:33,371 INFO L231 Difference]: Finished difference. Result has 252 places, 200 transitions, 1806 flow [2024-06-20 15:54:33,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1718, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1806, PETRI_PLACES=252, PETRI_TRANSITIONS=200} [2024-06-20 15:54:33,371 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 223 predicate places. [2024-06-20 15:54:33,371 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 200 transitions, 1806 flow [2024-06-20 15:54:33,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:33,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:33,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:33,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 15:54:33,372 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:33,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:33,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1277573009, now seen corresponding path program 6 times [2024-06-20 15:54:33,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:33,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625731859] [2024-06-20 15:54:33,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:33,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:34,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:34,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:34,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625731859] [2024-06-20 15:54:34,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625731859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:34,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:34,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:54:34,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318923605] [2024-06-20 15:54:34,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:34,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:54:34,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:34,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:54:34,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:54:34,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:54:34,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 200 transitions, 1806 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:34,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:34,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:54:34,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:34,985 INFO L124 PetriNetUnfolderBase]: 432/851 cut-off events. [2024-06-20 15:54:34,985 INFO L125 PetriNetUnfolderBase]: For 27883/27883 co-relation queries the response was YES. [2024-06-20 15:54:34,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4498 conditions, 851 events. 432/851 cut-off events. For 27883/27883 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 4762 event pairs, 125 based on Foata normal form. 2/853 useless extension candidates. Maximal degree in co-relation 4379. Up to 748 conditions per place. [2024-06-20 15:54:34,992 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 189 selfloop transitions, 21 changer transitions 0/213 dead transitions. [2024-06-20 15:54:34,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 213 transitions, 2404 flow [2024-06-20 15:54:34,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:54:34,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:54:34,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2024-06-20 15:54:34,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38666666666666666 [2024-06-20 15:54:34,993 INFO L175 Difference]: Start difference. First operand has 252 places, 200 transitions, 1806 flow. Second operand 10 states and 116 transitions. [2024-06-20 15:54:34,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 213 transitions, 2404 flow [2024-06-20 15:54:35,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 213 transitions, 2347 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-20 15:54:35,072 INFO L231 Difference]: Finished difference. Result has 255 places, 201 transitions, 1827 flow [2024-06-20 15:54:35,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1749, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1827, PETRI_PLACES=255, PETRI_TRANSITIONS=201} [2024-06-20 15:54:35,072 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 226 predicate places. [2024-06-20 15:54:35,072 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 201 transitions, 1827 flow [2024-06-20 15:54:35,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:35,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:35,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:35,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 15:54:35,073 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:35,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:35,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1277899439, now seen corresponding path program 7 times [2024-06-20 15:54:35,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:35,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612483307] [2024-06-20 15:54:35,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:35,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:35,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:36,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:36,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:36,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612483307] [2024-06-20 15:54:36,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612483307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:36,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:36,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:54:36,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562479236] [2024-06-20 15:54:36,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:36,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:54:36,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:36,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:54:36,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:54:36,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:54:36,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 201 transitions, 1827 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:36,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:36,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:54:36,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:36,555 INFO L124 PetriNetUnfolderBase]: 429/846 cut-off events. [2024-06-20 15:54:36,555 INFO L125 PetriNetUnfolderBase]: For 24675/24675 co-relation queries the response was YES. [2024-06-20 15:54:36,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4315 conditions, 846 events. 429/846 cut-off events. For 24675/24675 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 4729 event pairs, 126 based on Foata normal form. 2/848 useless extension candidates. Maximal degree in co-relation 4195. Up to 766 conditions per place. [2024-06-20 15:54:36,562 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 189 selfloop transitions, 20 changer transitions 0/212 dead transitions. [2024-06-20 15:54:36,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 212 transitions, 2269 flow [2024-06-20 15:54:36,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:54:36,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:54:36,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2024-06-20 15:54:36,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37575757575757573 [2024-06-20 15:54:36,563 INFO L175 Difference]: Start difference. First operand has 255 places, 201 transitions, 1827 flow. Second operand 11 states and 124 transitions. [2024-06-20 15:54:36,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 212 transitions, 2269 flow [2024-06-20 15:54:36,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 212 transitions, 2161 flow, removed 29 selfloop flow, removed 10 redundant places. [2024-06-20 15:54:36,641 INFO L231 Difference]: Finished difference. Result has 256 places, 201 transitions, 1763 flow [2024-06-20 15:54:36,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1719, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1763, PETRI_PLACES=256, PETRI_TRANSITIONS=201} [2024-06-20 15:54:36,641 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 227 predicate places. [2024-06-20 15:54:36,641 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 201 transitions, 1763 flow [2024-06-20 15:54:36,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:36,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:36,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:36,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 15:54:36,642 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:36,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:36,642 INFO L85 PathProgramCache]: Analyzing trace with hash -224154241, now seen corresponding path program 1 times [2024-06-20 15:54:36,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:36,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041571848] [2024-06-20 15:54:36,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:36,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:36,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:37,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:37,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:37,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041571848] [2024-06-20 15:54:37,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041571848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:37,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:37,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:54:37,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130753273] [2024-06-20 15:54:37,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:37,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:54:37,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:37,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:54:37,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:54:37,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:54:37,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 201 transitions, 1763 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:37,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:37,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:54:37,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:38,087 INFO L124 PetriNetUnfolderBase]: 441/875 cut-off events. [2024-06-20 15:54:38,087 INFO L125 PetriNetUnfolderBase]: For 35016/35016 co-relation queries the response was YES. [2024-06-20 15:54:38,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4302 conditions, 875 events. 441/875 cut-off events. For 35016/35016 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 4924 event pairs, 71 based on Foata normal form. 8/883 useless extension candidates. Maximal degree in co-relation 4184. Up to 736 conditions per place. [2024-06-20 15:54:38,094 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 188 selfloop transitions, 17 changer transitions 16/224 dead transitions. [2024-06-20 15:54:38,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 224 transitions, 2289 flow [2024-06-20 15:54:38,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:54:38,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:54:38,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-20 15:54:38,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403030303030303 [2024-06-20 15:54:38,095 INFO L175 Difference]: Start difference. First operand has 256 places, 201 transitions, 1763 flow. Second operand 11 states and 133 transitions. [2024-06-20 15:54:38,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 224 transitions, 2289 flow [2024-06-20 15:54:38,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 224 transitions, 2195 flow, removed 5 selfloop flow, removed 13 redundant places. [2024-06-20 15:54:38,168 INFO L231 Difference]: Finished difference. Result has 254 places, 197 transitions, 1675 flow [2024-06-20 15:54:38,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1669, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1675, PETRI_PLACES=254, PETRI_TRANSITIONS=197} [2024-06-20 15:54:38,168 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 225 predicate places. [2024-06-20 15:54:38,168 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 197 transitions, 1675 flow [2024-06-20 15:54:38,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:38,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:38,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:38,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 15:54:38,169 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:38,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:38,169 INFO L85 PathProgramCache]: Analyzing trace with hash -926006721, now seen corresponding path program 2 times [2024-06-20 15:54:38,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:38,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897957237] [2024-06-20 15:54:38,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:38,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:38,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:39,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:39,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:39,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897957237] [2024-06-20 15:54:39,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897957237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:39,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:39,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:54:39,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617656408] [2024-06-20 15:54:39,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:39,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:54:39,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:39,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:54:39,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:54:39,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:54:39,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 197 transitions, 1675 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:39,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:39,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:54:39,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:39,689 INFO L124 PetriNetUnfolderBase]: 425/845 cut-off events. [2024-06-20 15:54:39,689 INFO L125 PetriNetUnfolderBase]: For 35951/35951 co-relation queries the response was YES. [2024-06-20 15:54:39,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4126 conditions, 845 events. 425/845 cut-off events. For 35951/35951 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 4706 event pairs, 64 based on Foata normal form. 8/853 useless extension candidates. Maximal degree in co-relation 4010. Up to 715 conditions per place. [2024-06-20 15:54:39,695 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 185 selfloop transitions, 18 changer transitions 12/218 dead transitions. [2024-06-20 15:54:39,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 218 transitions, 2183 flow [2024-06-20 15:54:39,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:54:39,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:54:39,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-06-20 15:54:39,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396969696969697 [2024-06-20 15:54:39,696 INFO L175 Difference]: Start difference. First operand has 254 places, 197 transitions, 1675 flow. Second operand 11 states and 131 transitions. [2024-06-20 15:54:39,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 218 transitions, 2183 flow [2024-06-20 15:54:39,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 218 transitions, 2141 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-20 15:54:39,767 INFO L231 Difference]: Finished difference. Result has 248 places, 194 transitions, 1650 flow [2024-06-20 15:54:39,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1633, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1650, PETRI_PLACES=248, PETRI_TRANSITIONS=194} [2024-06-20 15:54:39,767 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 219 predicate places. [2024-06-20 15:54:39,767 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 194 transitions, 1650 flow [2024-06-20 15:54:39,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:39,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:39,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:39,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 15:54:39,767 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:39,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:39,768 INFO L85 PathProgramCache]: Analyzing trace with hash -256487631, now seen corresponding path program 3 times [2024-06-20 15:54:39,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:39,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950132087] [2024-06-20 15:54:39,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:39,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:39,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:40,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:40,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:40,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950132087] [2024-06-20 15:54:40,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950132087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:40,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:40,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:54:40,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699012646] [2024-06-20 15:54:40,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:40,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:54:40,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:40,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:54:40,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:54:40,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:54:40,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 194 transitions, 1650 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:40,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:40,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:54:40,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:41,176 INFO L124 PetriNetUnfolderBase]: 444/886 cut-off events. [2024-06-20 15:54:41,176 INFO L125 PetriNetUnfolderBase]: For 56050/56050 co-relation queries the response was YES. [2024-06-20 15:54:41,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4997 conditions, 886 events. 444/886 cut-off events. For 56050/56050 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 4949 event pairs, 71 based on Foata normal form. 8/894 useless extension candidates. Maximal degree in co-relation 4884. Up to 690 conditions per place. [2024-06-20 15:54:41,183 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 190 selfloop transitions, 20 changer transitions 7/220 dead transitions. [2024-06-20 15:54:41,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 220 transitions, 2380 flow [2024-06-20 15:54:41,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:54:41,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:54:41,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 137 transitions. [2024-06-20 15:54:41,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41515151515151516 [2024-06-20 15:54:41,184 INFO L175 Difference]: Start difference. First operand has 248 places, 194 transitions, 1650 flow. Second operand 11 states and 137 transitions. [2024-06-20 15:54:41,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 220 transitions, 2380 flow [2024-06-20 15:54:41,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 220 transitions, 2336 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-20 15:54:41,293 INFO L231 Difference]: Finished difference. Result has 244 places, 192 transitions, 1635 flow [2024-06-20 15:54:41,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1608, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1635, PETRI_PLACES=244, PETRI_TRANSITIONS=192} [2024-06-20 15:54:41,294 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 215 predicate places. [2024-06-20 15:54:41,294 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 192 transitions, 1635 flow [2024-06-20 15:54:41,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:41,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:41,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:41,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 15:54:41,294 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:41,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:41,295 INFO L85 PathProgramCache]: Analyzing trace with hash 799477169, now seen corresponding path program 4 times [2024-06-20 15:54:41,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:41,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141990275] [2024-06-20 15:54:41,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:41,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:41,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:42,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:42,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:42,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141990275] [2024-06-20 15:54:42,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141990275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:42,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:42,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:54:42,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423906657] [2024-06-20 15:54:42,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:42,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:54:42,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:42,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:54:42,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:54:42,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:54:42,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 192 transitions, 1635 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:42,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:42,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:54:42,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:42,688 INFO L124 PetriNetUnfolderBase]: 413/825 cut-off events. [2024-06-20 15:54:42,689 INFO L125 PetriNetUnfolderBase]: For 41084/41084 co-relation queries the response was YES. [2024-06-20 15:54:42,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4103 conditions, 825 events. 413/825 cut-off events. For 41084/41084 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 4585 event pairs, 62 based on Foata normal form. 10/835 useless extension candidates. Maximal degree in co-relation 3992. Up to 690 conditions per place. [2024-06-20 15:54:42,694 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 177 selfloop transitions, 15 changer transitions 18/213 dead transitions. [2024-06-20 15:54:42,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 213 transitions, 2187 flow [2024-06-20 15:54:42,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:54:42,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:54:42,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-06-20 15:54:42,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396969696969697 [2024-06-20 15:54:42,694 INFO L175 Difference]: Start difference. First operand has 244 places, 192 transitions, 1635 flow. Second operand 11 states and 131 transitions. [2024-06-20 15:54:42,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 213 transitions, 2187 flow [2024-06-20 15:54:42,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 213 transitions, 2145 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 15:54:42,758 INFO L231 Difference]: Finished difference. Result has 243 places, 186 transitions, 1581 flow [2024-06-20 15:54:42,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1593, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1581, PETRI_PLACES=243, PETRI_TRANSITIONS=186} [2024-06-20 15:54:42,759 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 214 predicate places. [2024-06-20 15:54:42,759 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 186 transitions, 1581 flow [2024-06-20 15:54:42,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:42,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:42,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:42,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 15:54:42,759 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:42,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:42,759 INFO L85 PathProgramCache]: Analyzing trace with hash -671529459, now seen corresponding path program 5 times [2024-06-20 15:54:42,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:42,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148339400] [2024-06-20 15:54:42,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:42,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:42,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:43,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:43,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:43,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148339400] [2024-06-20 15:54:43,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148339400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:43,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:43,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:54:43,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217845534] [2024-06-20 15:54:43,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:43,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:54:43,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:43,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:54:43,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:54:43,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:54:43,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 186 transitions, 1581 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:43,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:43,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:54:43,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:44,056 INFO L124 PetriNetUnfolderBase]: 391/775 cut-off events. [2024-06-20 15:54:44,056 INFO L125 PetriNetUnfolderBase]: For 25464/25464 co-relation queries the response was YES. [2024-06-20 15:54:44,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3834 conditions, 775 events. 391/775 cut-off events. For 25464/25464 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 4245 event pairs, 21 based on Foata normal form. 2/777 useless extension candidates. Maximal degree in co-relation 3724. Up to 639 conditions per place. [2024-06-20 15:54:44,062 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 182 selfloop transitions, 22 changer transitions 0/207 dead transitions. [2024-06-20 15:54:44,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 207 transitions, 2055 flow [2024-06-20 15:54:44,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:54:44,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:54:44,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 128 transitions. [2024-06-20 15:54:44,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3878787878787879 [2024-06-20 15:54:44,063 INFO L175 Difference]: Start difference. First operand has 243 places, 186 transitions, 1581 flow. Second operand 11 states and 128 transitions. [2024-06-20 15:54:44,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 207 transitions, 2055 flow [2024-06-20 15:54:44,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 207 transitions, 2015 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-20 15:54:44,143 INFO L231 Difference]: Finished difference. Result has 236 places, 187 transitions, 1609 flow [2024-06-20 15:54:44,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1541, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1609, PETRI_PLACES=236, PETRI_TRANSITIONS=187} [2024-06-20 15:54:44,143 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 207 predicate places. [2024-06-20 15:54:44,143 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 187 transitions, 1609 flow [2024-06-20 15:54:44,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:44,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:44,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:44,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 15:54:44,143 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:44,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:44,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1029565727, now seen corresponding path program 6 times [2024-06-20 15:54:44,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:44,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114965086] [2024-06-20 15:54:44,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:44,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:44,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:44,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:44,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:44,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114965086] [2024-06-20 15:54:44,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114965086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:44,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:44,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:54:44,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899493719] [2024-06-20 15:54:44,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:44,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:54:44,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:44,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:54:44,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:54:45,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:54:45,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 187 transitions, 1609 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:45,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:45,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:54:45,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:45,333 INFO L124 PetriNetUnfolderBase]: 403/803 cut-off events. [2024-06-20 15:54:45,334 INFO L125 PetriNetUnfolderBase]: For 34615/34615 co-relation queries the response was YES. [2024-06-20 15:54:45,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3966 conditions, 803 events. 403/803 cut-off events. For 34615/34615 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 4415 event pairs, 54 based on Foata normal form. 8/811 useless extension candidates. Maximal degree in co-relation 3858. Up to 676 conditions per place. [2024-06-20 15:54:45,339 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 178 selfloop transitions, 12 changer transitions 16/209 dead transitions. [2024-06-20 15:54:45,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 209 transitions, 2105 flow [2024-06-20 15:54:45,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:54:45,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:54:45,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-06-20 15:54:45,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396969696969697 [2024-06-20 15:54:45,341 INFO L175 Difference]: Start difference. First operand has 236 places, 187 transitions, 1609 flow. Second operand 11 states and 131 transitions. [2024-06-20 15:54:45,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 209 transitions, 2105 flow [2024-06-20 15:54:45,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 209 transitions, 2047 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-20 15:54:45,413 INFO L231 Difference]: Finished difference. Result has 238 places, 183 transitions, 1544 flow [2024-06-20 15:54:45,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1551, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1544, PETRI_PLACES=238, PETRI_TRANSITIONS=183} [2024-06-20 15:54:45,414 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 209 predicate places. [2024-06-20 15:54:45,414 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 183 transitions, 1544 flow [2024-06-20 15:54:45,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:45,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:45,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:45,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 15:54:45,414 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:45,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:45,414 INFO L85 PathProgramCache]: Analyzing trace with hash -887735339, now seen corresponding path program 7 times [2024-06-20 15:54:45,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:45,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214751564] [2024-06-20 15:54:45,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:45,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:45,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:46,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:46,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:46,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214751564] [2024-06-20 15:54:46,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214751564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:46,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:46,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:54:46,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531872102] [2024-06-20 15:54:46,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:46,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:54:46,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:46,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:54:46,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:54:46,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:54:46,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 183 transitions, 1544 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:46,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:46,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:54:46,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:46,954 INFO L124 PetriNetUnfolderBase]: 386/766 cut-off events. [2024-06-20 15:54:46,954 INFO L125 PetriNetUnfolderBase]: For 29353/29353 co-relation queries the response was YES. [2024-06-20 15:54:46,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3948 conditions, 766 events. 386/766 cut-off events. For 29353/29353 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 4175 event pairs, 55 based on Foata normal form. 2/768 useless extension candidates. Maximal degree in co-relation 3839. Up to 657 conditions per place. [2024-06-20 15:54:46,960 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 180 selfloop transitions, 21 changer transitions 0/204 dead transitions. [2024-06-20 15:54:46,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 204 transitions, 2184 flow [2024-06-20 15:54:46,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:54:46,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:54:46,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-06-20 15:54:46,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396969696969697 [2024-06-20 15:54:46,961 INFO L175 Difference]: Start difference. First operand has 238 places, 183 transitions, 1544 flow. Second operand 11 states and 131 transitions. [2024-06-20 15:54:46,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 204 transitions, 2184 flow [2024-06-20 15:54:47,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 204 transitions, 2150 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-20 15:54:47,042 INFO L231 Difference]: Finished difference. Result has 233 places, 187 transitions, 1636 flow [2024-06-20 15:54:47,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1512, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1636, PETRI_PLACES=233, PETRI_TRANSITIONS=187} [2024-06-20 15:54:47,043 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 204 predicate places. [2024-06-20 15:54:47,043 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 187 transitions, 1636 flow [2024-06-20 15:54:47,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:47,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:47,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:47,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 15:54:47,043 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:47,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:47,044 INFO L85 PathProgramCache]: Analyzing trace with hash -887557709, now seen corresponding path program 8 times [2024-06-20 15:54:47,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:47,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210666758] [2024-06-20 15:54:47,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:47,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:47,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:47,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:47,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:47,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210666758] [2024-06-20 15:54:47,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210666758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:47,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:47,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:54:47,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044257045] [2024-06-20 15:54:47,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:47,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:54:47,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:47,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:54:47,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:54:48,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:54:48,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 187 transitions, 1636 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:48,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:48,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:54:48,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:48,305 INFO L124 PetriNetUnfolderBase]: 395/793 cut-off events. [2024-06-20 15:54:48,305 INFO L125 PetriNetUnfolderBase]: For 41404/41404 co-relation queries the response was YES. [2024-06-20 15:54:48,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3980 conditions, 793 events. 395/793 cut-off events. For 41404/41404 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 4360 event pairs, 64 based on Foata normal form. 10/803 useless extension candidates. Maximal degree in co-relation 3873. Up to 658 conditions per place. [2024-06-20 15:54:48,310 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 174 selfloop transitions, 16 changer transitions 12/205 dead transitions. [2024-06-20 15:54:48,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 205 transitions, 2132 flow [2024-06-20 15:54:48,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:54:48,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:54:48,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2024-06-20 15:54:48,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 15:54:48,311 INFO L175 Difference]: Start difference. First operand has 233 places, 187 transitions, 1636 flow. Second operand 11 states and 132 transitions. [2024-06-20 15:54:48,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 205 transitions, 2132 flow [2024-06-20 15:54:48,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 205 transitions, 2053 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-20 15:54:48,396 INFO L231 Difference]: Finished difference. Result has 238 places, 181 transitions, 1546 flow [2024-06-20 15:54:48,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1557, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1546, PETRI_PLACES=238, PETRI_TRANSITIONS=181} [2024-06-20 15:54:48,396 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 209 predicate places. [2024-06-20 15:54:48,396 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 181 transitions, 1546 flow [2024-06-20 15:54:48,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:48,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:48,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:48,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 15:54:48,397 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:48,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:48,397 INFO L85 PathProgramCache]: Analyzing trace with hash -892319309, now seen corresponding path program 9 times [2024-06-20 15:54:48,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:48,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204334160] [2024-06-20 15:54:48,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:48,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:48,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:49,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:49,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:49,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204334160] [2024-06-20 15:54:49,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204334160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:49,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:49,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:54:49,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768873878] [2024-06-20 15:54:49,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:49,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:54:49,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:49,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:54:49,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:54:49,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:54:49,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 181 transitions, 1546 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:49,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:49,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:54:49,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:49,618 INFO L124 PetriNetUnfolderBase]: 383/773 cut-off events. [2024-06-20 15:54:49,618 INFO L125 PetriNetUnfolderBase]: For 37327/37327 co-relation queries the response was YES. [2024-06-20 15:54:49,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3807 conditions, 773 events. 383/773 cut-off events. For 37327/37327 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 4206 event pairs, 54 based on Foata normal form. 8/781 useless extension candidates. Maximal degree in co-relation 3698. Up to 651 conditions per place. [2024-06-20 15:54:49,625 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 173 selfloop transitions, 13 changer transitions 12/201 dead transitions. [2024-06-20 15:54:49,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 201 transitions, 2022 flow [2024-06-20 15:54:49,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:54:49,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:54:49,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-20 15:54:49,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39090909090909093 [2024-06-20 15:54:49,626 INFO L175 Difference]: Start difference. First operand has 238 places, 181 transitions, 1546 flow. Second operand 11 states and 129 transitions. [2024-06-20 15:54:49,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 201 transitions, 2022 flow [2024-06-20 15:54:49,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 201 transitions, 1978 flow, removed 3 selfloop flow, removed 13 redundant places. [2024-06-20 15:54:49,707 INFO L231 Difference]: Finished difference. Result has 233 places, 178 transitions, 1508 flow [2024-06-20 15:54:49,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1502, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1508, PETRI_PLACES=233, PETRI_TRANSITIONS=178} [2024-06-20 15:54:49,707 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 204 predicate places. [2024-06-20 15:54:49,707 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 178 transitions, 1508 flow [2024-06-20 15:54:49,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:49,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:49,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:49,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 15:54:49,708 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:49,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:49,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1909149923, now seen corresponding path program 10 times [2024-06-20 15:54:49,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:49,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870233512] [2024-06-20 15:54:49,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:49,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:49,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:50,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:50,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:50,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870233512] [2024-06-20 15:54:50,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870233512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:50,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:50,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:54:50,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406737525] [2024-06-20 15:54:50,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:50,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:54:50,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:50,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:54:50,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:54:50,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:54:50,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 178 transitions, 1508 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:50,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:50,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:54:50,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:51,155 INFO L124 PetriNetUnfolderBase]: 365/735 cut-off events. [2024-06-20 15:54:51,155 INFO L125 PetriNetUnfolderBase]: For 26136/26136 co-relation queries the response was YES. [2024-06-20 15:54:51,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3659 conditions, 735 events. 365/735 cut-off events. For 26136/26136 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 3950 event pairs, 54 based on Foata normal form. 2/737 useless extension candidates. Maximal degree in co-relation 3552. Up to 637 conditions per place. [2024-06-20 15:54:51,161 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 165 selfloop transitions, 25 changer transitions 0/193 dead transitions. [2024-06-20 15:54:51,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 193 transitions, 1944 flow [2024-06-20 15:54:51,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:54:51,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:54:51,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-20 15:54:51,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2024-06-20 15:54:51,162 INFO L175 Difference]: Start difference. First operand has 233 places, 178 transitions, 1508 flow. Second operand 11 states and 130 transitions. [2024-06-20 15:54:51,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 193 transitions, 1944 flow [2024-06-20 15:54:51,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 193 transitions, 1912 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-20 15:54:51,235 INFO L231 Difference]: Finished difference. Result has 229 places, 179 transitions, 1554 flow [2024-06-20 15:54:51,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1476, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1554, PETRI_PLACES=229, PETRI_TRANSITIONS=179} [2024-06-20 15:54:51,235 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 200 predicate places. [2024-06-20 15:54:51,235 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 179 transitions, 1554 flow [2024-06-20 15:54:51,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:51,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:51,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:51,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 15:54:51,236 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:51,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:51,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1902893813, now seen corresponding path program 11 times [2024-06-20 15:54:51,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:51,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739603693] [2024-06-20 15:54:51,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:51,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:51,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:52,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:52,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:52,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739603693] [2024-06-20 15:54:52,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739603693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:52,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:52,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:54:52,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289910964] [2024-06-20 15:54:52,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:52,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:54:52,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:52,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:54:52,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:54:52,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:54:52,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 179 transitions, 1554 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:52,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:52,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:54:52,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:52,729 INFO L124 PetriNetUnfolderBase]: 369/743 cut-off events. [2024-06-20 15:54:52,729 INFO L125 PetriNetUnfolderBase]: For 26426/26426 co-relation queries the response was YES. [2024-06-20 15:54:52,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3747 conditions, 743 events. 369/743 cut-off events. For 26426/26426 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 4013 event pairs, 56 based on Foata normal form. 2/745 useless extension candidates. Maximal degree in co-relation 3642. Up to 633 conditions per place. [2024-06-20 15:54:52,734 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 159 selfloop transitions, 32 changer transitions 0/194 dead transitions. [2024-06-20 15:54:52,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 194 transitions, 1994 flow [2024-06-20 15:54:52,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:54:52,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:54:52,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-20 15:54:52,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403030303030303 [2024-06-20 15:54:52,735 INFO L175 Difference]: Start difference. First operand has 229 places, 179 transitions, 1554 flow. Second operand 11 states and 133 transitions. [2024-06-20 15:54:52,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 194 transitions, 1994 flow [2024-06-20 15:54:52,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 194 transitions, 1929 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-20 15:54:52,810 INFO L231 Difference]: Finished difference. Result has 232 places, 180 transitions, 1583 flow [2024-06-20 15:54:52,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1489, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1583, PETRI_PLACES=232, PETRI_TRANSITIONS=180} [2024-06-20 15:54:52,810 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 203 predicate places. [2024-06-20 15:54:52,810 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 180 transitions, 1583 flow [2024-06-20 15:54:52,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:52,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:52,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:52,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 15:54:52,811 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:52,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:52,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1595836885, now seen corresponding path program 12 times [2024-06-20 15:54:52,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:52,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457552612] [2024-06-20 15:54:52,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:52,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:52,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:54,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:54,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:54,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457552612] [2024-06-20 15:54:54,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457552612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:54,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:54,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:54:54,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529130967] [2024-06-20 15:54:54,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:54,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:54:54,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:54,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:54:54,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:54:54,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:54:54,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 180 transitions, 1583 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:54,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:54,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:54:54,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:54,682 INFO L124 PetriNetUnfolderBase]: 373/751 cut-off events. [2024-06-20 15:54:54,682 INFO L125 PetriNetUnfolderBase]: For 27314/27314 co-relation queries the response was YES. [2024-06-20 15:54:54,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3812 conditions, 751 events. 373/751 cut-off events. For 27314/27314 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 4088 event pairs, 56 based on Foata normal form. 2/753 useless extension candidates. Maximal degree in co-relation 3706. Up to 633 conditions per place. [2024-06-20 15:54:54,688 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 166 selfloop transitions, 27 changer transitions 0/196 dead transitions. [2024-06-20 15:54:54,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 196 transitions, 2031 flow [2024-06-20 15:54:54,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:54:54,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:54:54,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2024-06-20 15:54:54,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 15:54:54,689 INFO L175 Difference]: Start difference. First operand has 232 places, 180 transitions, 1583 flow. Second operand 11 states and 132 transitions. [2024-06-20 15:54:54,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 196 transitions, 2031 flow [2024-06-20 15:54:54,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 196 transitions, 1947 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-20 15:54:54,764 INFO L231 Difference]: Finished difference. Result has 234 places, 181 transitions, 1585 flow [2024-06-20 15:54:54,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1499, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1585, PETRI_PLACES=234, PETRI_TRANSITIONS=181} [2024-06-20 15:54:54,764 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 205 predicate places. [2024-06-20 15:54:54,765 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 181 transitions, 1585 flow [2024-06-20 15:54:54,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:54,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:54,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:54,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 15:54:54,765 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:54,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:54,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1766539315, now seen corresponding path program 13 times [2024-06-20 15:54:54,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:54,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439648256] [2024-06-20 15:54:54,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:54,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:54,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:55,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:55,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:55,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439648256] [2024-06-20 15:54:55,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439648256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:55,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:55,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:54:55,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119224962] [2024-06-20 15:54:55,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:55,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:54:55,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:55,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:54:55,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:54:56,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:54:56,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 181 transitions, 1585 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:56,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:56,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:54:56,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:56,357 INFO L124 PetriNetUnfolderBase]: 377/755 cut-off events. [2024-06-20 15:54:56,357 INFO L125 PetriNetUnfolderBase]: For 28246/28246 co-relation queries the response was YES. [2024-06-20 15:54:56,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3853 conditions, 755 events. 377/755 cut-off events. For 28246/28246 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 4124 event pairs, 56 based on Foata normal form. 2/757 useless extension candidates. Maximal degree in co-relation 3746. Up to 668 conditions per place. [2024-06-20 15:54:56,362 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 176 selfloop transitions, 18 changer transitions 0/197 dead transitions. [2024-06-20 15:54:56,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 197 transitions, 2037 flow [2024-06-20 15:54:56,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:54:56,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:54:56,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-20 15:54:56,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2024-06-20 15:54:56,363 INFO L175 Difference]: Start difference. First operand has 234 places, 181 transitions, 1585 flow. Second operand 11 states and 126 transitions. [2024-06-20 15:54:56,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 197 transitions, 2037 flow [2024-06-20 15:54:56,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 197 transitions, 1961 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-20 15:54:56,446 INFO L231 Difference]: Finished difference. Result has 236 places, 182 transitions, 1579 flow [2024-06-20 15:54:56,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1509, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1579, PETRI_PLACES=236, PETRI_TRANSITIONS=182} [2024-06-20 15:54:56,447 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 207 predicate places. [2024-06-20 15:54:56,447 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 182 transitions, 1579 flow [2024-06-20 15:54:56,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:56,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:56,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:56,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 15:54:56,447 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:56,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:56,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1731898433, now seen corresponding path program 14 times [2024-06-20 15:54:56,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:56,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244835464] [2024-06-20 15:54:56,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:56,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:57,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:57,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:57,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244835464] [2024-06-20 15:54:57,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244835464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:57,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:57,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:54:57,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834563809] [2024-06-20 15:54:57,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:57,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:54:57,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:57,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:54:57,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:54:57,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:54:57,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 182 transitions, 1579 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:57,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:57,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:54:57,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:57,989 INFO L124 PetriNetUnfolderBase]: 381/767 cut-off events. [2024-06-20 15:54:57,989 INFO L125 PetriNetUnfolderBase]: For 29160/29160 co-relation queries the response was YES. [2024-06-20 15:54:57,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3886 conditions, 767 events. 381/767 cut-off events. For 29160/29160 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 4189 event pairs, 58 based on Foata normal form. 2/769 useless extension candidates. Maximal degree in co-relation 3778. Up to 671 conditions per place. [2024-06-20 15:54:57,995 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 178 selfloop transitions, 18 changer transitions 0/199 dead transitions. [2024-06-20 15:54:57,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 199 transitions, 2039 flow [2024-06-20 15:54:57,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:54:57,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:54:57,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-20 15:54:57,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38484848484848483 [2024-06-20 15:54:57,998 INFO L175 Difference]: Start difference. First operand has 236 places, 182 transitions, 1579 flow. Second operand 11 states and 127 transitions. [2024-06-20 15:54:57,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 199 transitions, 2039 flow [2024-06-20 15:54:58,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 199 transitions, 1979 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-20 15:54:58,081 INFO L231 Difference]: Finished difference. Result has 238 places, 183 transitions, 1591 flow [2024-06-20 15:54:58,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1519, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1591, PETRI_PLACES=238, PETRI_TRANSITIONS=183} [2024-06-20 15:54:58,081 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 209 predicate places. [2024-06-20 15:54:58,081 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 183 transitions, 1591 flow [2024-06-20 15:54:58,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:54:58,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:58,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:58,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 15:54:58,082 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:58,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:58,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1909395877, now seen corresponding path program 1 times [2024-06-20 15:54:58,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:58,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940239838] [2024-06-20 15:54:58,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:58,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:58,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:59,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:59,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:59,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940239838] [2024-06-20 15:54:59,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940239838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:59,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:59,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:54:59,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670891729] [2024-06-20 15:54:59,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:59,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:54:59,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:59,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:54:59,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:54:59,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:54:59,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 183 transitions, 1591 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:59,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:59,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:54:59,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:59,611 INFO L124 PetriNetUnfolderBase]: 411/833 cut-off events. [2024-06-20 15:54:59,611 INFO L125 PetriNetUnfolderBase]: For 55466/55466 co-relation queries the response was YES. [2024-06-20 15:54:59,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4755 conditions, 833 events. 411/833 cut-off events. For 55466/55466 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 4644 event pairs, 72 based on Foata normal form. 6/839 useless extension candidates. Maximal degree in co-relation 4646. Up to 621 conditions per place. [2024-06-20 15:54:59,617 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 169 selfloop transitions, 26 changer transitions 6/204 dead transitions. [2024-06-20 15:54:59,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 204 transitions, 2261 flow [2024-06-20 15:54:59,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:54:59,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:54:59,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 137 transitions. [2024-06-20 15:54:59,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41515151515151516 [2024-06-20 15:54:59,618 INFO L175 Difference]: Start difference. First operand has 238 places, 183 transitions, 1591 flow. Second operand 11 states and 137 transitions. [2024-06-20 15:54:59,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 204 transitions, 2261 flow [2024-06-20 15:54:59,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 204 transitions, 2199 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-20 15:54:59,752 INFO L231 Difference]: Finished difference. Result has 240 places, 181 transitions, 1565 flow [2024-06-20 15:54:59,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1529, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1565, PETRI_PLACES=240, PETRI_TRANSITIONS=181} [2024-06-20 15:54:59,752 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 211 predicate places. [2024-06-20 15:54:59,752 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 181 transitions, 1565 flow [2024-06-20 15:54:59,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:59,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:59,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:59,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 15:54:59,753 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:59,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:59,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1909387507, now seen corresponding path program 2 times [2024-06-20 15:54:59,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:59,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895269282] [2024-06-20 15:54:59,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:59,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:59,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:01,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:01,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:01,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895269282] [2024-06-20 15:55:01,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895269282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:01,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:01,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:55:01,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884068349] [2024-06-20 15:55:01,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:01,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:55:01,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:01,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:55:01,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:55:01,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:55:01,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 181 transitions, 1565 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:55:01,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:01,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:55:01,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:02,129 INFO L124 PetriNetUnfolderBase]: 409/827 cut-off events. [2024-06-20 15:55:02,129 INFO L125 PetriNetUnfolderBase]: For 62849/62849 co-relation queries the response was YES. [2024-06-20 15:55:02,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4728 conditions, 827 events. 409/827 cut-off events. For 62849/62849 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 4607 event pairs, 76 based on Foata normal form. 8/835 useless extension candidates. Maximal degree in co-relation 4618. Up to 695 conditions per place. [2024-06-20 15:55:02,135 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 160 selfloop transitions, 26 changer transitions 10/199 dead transitions. [2024-06-20 15:55:02,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 199 transitions, 2047 flow [2024-06-20 15:55:02,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:55:02,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:55:02,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 143 transitions. [2024-06-20 15:55:02,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3972222222222222 [2024-06-20 15:55:02,136 INFO L175 Difference]: Start difference. First operand has 240 places, 181 transitions, 1565 flow. Second operand 12 states and 143 transitions. [2024-06-20 15:55:02,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 199 transitions, 2047 flow [2024-06-20 15:55:02,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 199 transitions, 1999 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 15:55:02,270 INFO L231 Difference]: Finished difference. Result has 240 places, 177 transitions, 1533 flow [2024-06-20 15:55:02,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1517, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1533, PETRI_PLACES=240, PETRI_TRANSITIONS=177} [2024-06-20 15:55:02,270 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 211 predicate places. [2024-06-20 15:55:02,270 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 177 transitions, 1533 flow [2024-06-20 15:55:02,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:55:02,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:02,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:02,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 15:55:02,270 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:55:02,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:02,271 INFO L85 PathProgramCache]: Analyzing trace with hash -2019610239, now seen corresponding path program 3 times [2024-06-20 15:55:02,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:02,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031283840] [2024-06-20 15:55:02,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:02,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:02,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:03,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:03,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:03,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031283840] [2024-06-20 15:55:03,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031283840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:03,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:03,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:55:03,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184350041] [2024-06-20 15:55:03,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:03,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:55:03,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:03,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:55:03,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:55:03,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:55:03,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 177 transitions, 1533 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:55:03,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:03,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:55:03,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:04,191 INFO L124 PetriNetUnfolderBase]: 403/814 cut-off events. [2024-06-20 15:55:04,191 INFO L125 PetriNetUnfolderBase]: For 62826/62826 co-relation queries the response was YES. [2024-06-20 15:55:04,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4680 conditions, 814 events. 403/814 cut-off events. For 62826/62826 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 4523 event pairs, 80 based on Foata normal form. 8/822 useless extension candidates. Maximal degree in co-relation 4571. Up to 662 conditions per place. [2024-06-20 15:55:04,196 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 155 selfloop transitions, 24 changer transitions 12/194 dead transitions. [2024-06-20 15:55:04,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 194 transitions, 2003 flow [2024-06-20 15:55:04,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:55:04,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:55:04,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 136 transitions. [2024-06-20 15:55:04,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121212121212121 [2024-06-20 15:55:04,197 INFO L175 Difference]: Start difference. First operand has 240 places, 177 transitions, 1533 flow. Second operand 11 states and 136 transitions. [2024-06-20 15:55:04,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 194 transitions, 2003 flow [2024-06-20 15:55:04,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 194 transitions, 1936 flow, removed 1 selfloop flow, removed 13 redundant places. [2024-06-20 15:55:04,329 INFO L231 Difference]: Finished difference. Result has 236 places, 171 transitions, 1465 flow [2024-06-20 15:55:04,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1466, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1465, PETRI_PLACES=236, PETRI_TRANSITIONS=171} [2024-06-20 15:55:04,330 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 207 predicate places. [2024-06-20 15:55:04,330 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 171 transitions, 1465 flow [2024-06-20 15:55:04,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:55:04,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:04,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:04,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 15:55:04,330 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:55:04,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:04,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1909156867, now seen corresponding path program 4 times [2024-06-20 15:55:04,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:04,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118184247] [2024-06-20 15:55:04,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:04,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:04,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:05,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:05,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:05,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118184247] [2024-06-20 15:55:05,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118184247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:05,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:05,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:55:05,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037409559] [2024-06-20 15:55:05,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:05,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:55:05,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:05,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:55:05,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:55:05,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:55:05,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 171 transitions, 1465 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:55:05,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:05,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:55:05,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:06,130 INFO L124 PetriNetUnfolderBase]: 384/782 cut-off events. [2024-06-20 15:55:06,130 INFO L125 PetriNetUnfolderBase]: For 58763/58763 co-relation queries the response was YES. [2024-06-20 15:55:06,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4300 conditions, 782 events. 384/782 cut-off events. For 58763/58763 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 4263 event pairs, 75 based on Foata normal form. 8/790 useless extension candidates. Maximal degree in co-relation 4191. Up to 658 conditions per place. [2024-06-20 15:55:06,136 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 159 selfloop transitions, 20 changer transitions 7/189 dead transitions. [2024-06-20 15:55:06,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 189 transitions, 1927 flow [2024-06-20 15:55:06,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:55:06,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:55:06,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 141 transitions. [2024-06-20 15:55:06,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39166666666666666 [2024-06-20 15:55:06,137 INFO L175 Difference]: Start difference. First operand has 236 places, 171 transitions, 1465 flow. Second operand 12 states and 141 transitions. [2024-06-20 15:55:06,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 189 transitions, 1927 flow [2024-06-20 15:55:06,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 189 transitions, 1865 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-20 15:55:06,246 INFO L231 Difference]: Finished difference. Result has 233 places, 168 transitions, 1419 flow [2024-06-20 15:55:06,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1403, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1419, PETRI_PLACES=233, PETRI_TRANSITIONS=168} [2024-06-20 15:55:06,247 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 204 predicate places. [2024-06-20 15:55:06,247 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 168 transitions, 1419 flow [2024-06-20 15:55:06,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:55:06,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:06,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:06,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 15:55:06,247 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:55:06,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:06,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1786711363, now seen corresponding path program 15 times [2024-06-20 15:55:06,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:06,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336004750] [2024-06-20 15:55:06,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:06,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:06,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:07,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:07,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:07,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336004750] [2024-06-20 15:55:07,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336004750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:07,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:07,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:55:07,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698880899] [2024-06-20 15:55:07,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:07,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:55:07,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:07,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:55:07,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:55:07,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:55:07,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 168 transitions, 1419 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:55:07,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:07,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:55:07,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:07,506 INFO L124 PetriNetUnfolderBase]: 379/775 cut-off events. [2024-06-20 15:55:07,506 INFO L125 PetriNetUnfolderBase]: For 55154/55154 co-relation queries the response was YES. [2024-06-20 15:55:07,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4208 conditions, 775 events. 379/775 cut-off events. For 55154/55154 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4195 event pairs, 71 based on Foata normal form. 8/783 useless extension candidates. Maximal degree in co-relation 4100. Up to 648 conditions per place. [2024-06-20 15:55:07,512 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 156 selfloop transitions, 16 changer transitions 12/187 dead transitions. [2024-06-20 15:55:07,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 187 transitions, 1871 flow [2024-06-20 15:55:07,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:55:07,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:55:07,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-06-20 15:55:07,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 15:55:07,512 INFO L175 Difference]: Start difference. First operand has 233 places, 168 transitions, 1419 flow. Second operand 10 states and 120 transitions. [2024-06-20 15:55:07,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 187 transitions, 1871 flow [2024-06-20 15:55:07,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 187 transitions, 1823 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-20 15:55:07,641 INFO L231 Difference]: Finished difference. Result has 230 places, 165 transitions, 1392 flow [2024-06-20 15:55:07,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1371, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1392, PETRI_PLACES=230, PETRI_TRANSITIONS=165} [2024-06-20 15:55:07,642 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 201 predicate places. [2024-06-20 15:55:07,642 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 165 transitions, 1392 flow [2024-06-20 15:55:07,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:55:07,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:07,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:07,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 15:55:07,643 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:55:07,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:07,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1791295333, now seen corresponding path program 16 times [2024-06-20 15:55:07,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:07,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052035552] [2024-06-20 15:55:07,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:07,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:07,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:08,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:08,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:08,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052035552] [2024-06-20 15:55:08,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052035552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:08,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:08,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:55:08,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382051711] [2024-06-20 15:55:08,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:08,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:55:08,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:08,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:55:08,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:55:08,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:55:08,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 165 transitions, 1392 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:55:08,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:08,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:55:08,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:08,941 INFO L124 PetriNetUnfolderBase]: 398/816 cut-off events. [2024-06-20 15:55:08,941 INFO L125 PetriNetUnfolderBase]: For 80060/80060 co-relation queries the response was YES. [2024-06-20 15:55:08,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5170 conditions, 816 events. 398/816 cut-off events. For 80060/80060 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 4475 event pairs, 82 based on Foata normal form. 8/824 useless extension candidates. Maximal degree in co-relation 5062. Up to 602 conditions per place. [2024-06-20 15:55:08,947 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 158 selfloop transitions, 15 changer transitions 13/189 dead transitions. [2024-06-20 15:55:08,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 189 transitions, 2098 flow [2024-06-20 15:55:08,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:55:08,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:55:08,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 126 transitions. [2024-06-20 15:55:08,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42 [2024-06-20 15:55:08,948 INFO L175 Difference]: Start difference. First operand has 230 places, 165 transitions, 1392 flow. Second operand 10 states and 126 transitions. [2024-06-20 15:55:08,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 189 transitions, 2098 flow [2024-06-20 15:55:09,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 189 transitions, 2054 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-20 15:55:09,089 INFO L231 Difference]: Finished difference. Result has 226 places, 157 transitions, 1328 flow [2024-06-20 15:55:09,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1354, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1328, PETRI_PLACES=226, PETRI_TRANSITIONS=157} [2024-06-20 15:55:09,090 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 197 predicate places. [2024-06-20 15:55:09,090 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 157 transitions, 1328 flow [2024-06-20 15:55:09,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:55:09,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:09,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:09,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 15:55:09,090 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:55:09,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:09,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1284115583, now seen corresponding path program 17 times [2024-06-20 15:55:09,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:09,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602352198] [2024-06-20 15:55:09,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:09,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:09,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:10,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:10,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:10,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602352198] [2024-06-20 15:55:10,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602352198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:10,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:10,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:55:10,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585868544] [2024-06-20 15:55:10,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:10,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:55:10,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:10,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:55:10,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:55:10,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:55:10,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 157 transitions, 1328 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:55:10,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:10,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:55:10,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:10,491 INFO L124 PetriNetUnfolderBase]: 363/741 cut-off events. [2024-06-20 15:55:10,492 INFO L125 PetriNetUnfolderBase]: For 57723/57723 co-relation queries the response was YES. [2024-06-20 15:55:10,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4661 conditions, 741 events. 363/741 cut-off events. For 57723/57723 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 3950 event pairs, 81 based on Foata normal form. 2/743 useless extension candidates. Maximal degree in co-relation 4567. Up to 659 conditions per place. [2024-06-20 15:55:10,496 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 154 selfloop transitions, 17 changer transitions 0/174 dead transitions. [2024-06-20 15:55:10,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 174 transitions, 1776 flow [2024-06-20 15:55:10,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:55:10,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:55:10,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2024-06-20 15:55:10,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38666666666666666 [2024-06-20 15:55:10,497 INFO L175 Difference]: Start difference. First operand has 226 places, 157 transitions, 1328 flow. Second operand 10 states and 116 transitions. [2024-06-20 15:55:10,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 174 transitions, 1776 flow [2024-06-20 15:55:10,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 174 transitions, 1709 flow, removed 9 selfloop flow, removed 14 redundant places. [2024-06-20 15:55:10,629 INFO L231 Difference]: Finished difference. Result has 216 places, 160 transitions, 1378 flow [2024-06-20 15:55:10,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1266, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1378, PETRI_PLACES=216, PETRI_TRANSITIONS=160} [2024-06-20 15:55:10,629 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 187 predicate places. [2024-06-20 15:55:10,629 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 160 transitions, 1378 flow [2024-06-20 15:55:10,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:55:10,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:10,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:10,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 15:55:10,630 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:55:10,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:10,630 INFO L85 PathProgramCache]: Analyzing trace with hash 260551553, now seen corresponding path program 18 times [2024-06-20 15:55:10,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:10,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252092112] [2024-06-20 15:55:10,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:10,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:10,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:11,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:11,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:11,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252092112] [2024-06-20 15:55:11,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252092112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:11,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:11,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:55:11,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840208866] [2024-06-20 15:55:11,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:11,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:55:11,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:11,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:55:11,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:55:11,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:55:11,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 160 transitions, 1378 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:55:11,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:11,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:55:11,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:11,804 INFO L124 PetriNetUnfolderBase]: 375/769 cut-off events. [2024-06-20 15:55:11,804 INFO L125 PetriNetUnfolderBase]: For 64943/64943 co-relation queries the response was YES. [2024-06-20 15:55:11,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4702 conditions, 769 events. 375/769 cut-off events. For 64943/64943 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4172 event pairs, 59 based on Foata normal form. 8/777 useless extension candidates. Maximal degree in co-relation 4611. Up to 601 conditions per place. [2024-06-20 15:55:11,810 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 143 selfloop transitions, 9 changer transitions 25/180 dead transitions. [2024-06-20 15:55:11,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 180 transitions, 1818 flow [2024-06-20 15:55:11,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:55:11,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:55:11,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-20 15:55:11,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39666666666666667 [2024-06-20 15:55:11,810 INFO L175 Difference]: Start difference. First operand has 216 places, 160 transitions, 1378 flow. Second operand 10 states and 119 transitions. [2024-06-20 15:55:11,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 180 transitions, 1818 flow [2024-06-20 15:55:11,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 180 transitions, 1730 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-20 15:55:11,940 INFO L231 Difference]: Finished difference. Result has 219 places, 149 transitions, 1236 flow [2024-06-20 15:55:11,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1290, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1236, PETRI_PLACES=219, PETRI_TRANSITIONS=149} [2024-06-20 15:55:11,941 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 190 predicate places. [2024-06-20 15:55:11,941 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 149 transitions, 1236 flow [2024-06-20 15:55:11,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:55:11,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:11,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:11,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 15:55:11,941 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:55:11,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:11,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1104463553, now seen corresponding path program 19 times [2024-06-20 15:55:11,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:11,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299677590] [2024-06-20 15:55:11,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:11,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:11,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:12,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:12,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:12,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299677590] [2024-06-20 15:55:12,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299677590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:12,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:12,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:55:12,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064021050] [2024-06-20 15:55:12,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:12,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:55:12,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:12,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:55:12,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:55:12,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:55:12,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 149 transitions, 1236 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:55:12,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:12,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:55:12,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:13,263 INFO L124 PetriNetUnfolderBase]: 337/689 cut-off events. [2024-06-20 15:55:13,263 INFO L125 PetriNetUnfolderBase]: For 64230/64230 co-relation queries the response was YES. [2024-06-20 15:55:13,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4348 conditions, 689 events. 337/689 cut-off events. For 64230/64230 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 3639 event pairs, 54 based on Foata normal form. 8/697 useless extension candidates. Maximal degree in co-relation 4256. Up to 560 conditions per place. [2024-06-20 15:55:13,268 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 132 selfloop transitions, 14 changer transitions 15/164 dead transitions. [2024-06-20 15:55:13,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 164 transitions, 1632 flow [2024-06-20 15:55:13,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:55:13,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:55:13,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-20 15:55:13,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-20 15:55:13,269 INFO L175 Difference]: Start difference. First operand has 219 places, 149 transitions, 1236 flow. Second operand 10 states and 115 transitions. [2024-06-20 15:55:13,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 164 transitions, 1632 flow [2024-06-20 15:55:13,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 164 transitions, 1585 flow, removed 11 selfloop flow, removed 13 redundant places. [2024-06-20 15:55:13,373 INFO L231 Difference]: Finished difference. Result has 205 places, 142 transitions, 1150 flow [2024-06-20 15:55:13,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1191, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1150, PETRI_PLACES=205, PETRI_TRANSITIONS=142} [2024-06-20 15:55:13,374 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 176 predicate places. [2024-06-20 15:55:13,374 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 142 transitions, 1150 flow [2024-06-20 15:55:13,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:55:13,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:13,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:13,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 15:55:13,374 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:55:13,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:13,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1284108639, now seen corresponding path program 5 times [2024-06-20 15:55:13,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:13,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648644080] [2024-06-20 15:55:13,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:13,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:13,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:14,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:14,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:14,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648644080] [2024-06-20 15:55:14,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648644080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:14,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:14,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:55:14,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002592975] [2024-06-20 15:55:14,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:14,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:55:14,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:14,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:55:14,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:55:14,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:55:14,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 142 transitions, 1150 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:55:14,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:14,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:55:14,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:14,843 INFO L124 PetriNetUnfolderBase]: 297/609 cut-off events. [2024-06-20 15:55:14,843 INFO L125 PetriNetUnfolderBase]: For 41758/41758 co-relation queries the response was YES. [2024-06-20 15:55:14,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3405 conditions, 609 events. 297/609 cut-off events. For 41758/41758 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3098 event pairs, 46 based on Foata normal form. 8/617 useless extension candidates. Maximal degree in co-relation 3318. Up to 495 conditions per place. [2024-06-20 15:55:14,847 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 127 selfloop transitions, 7 changer transitions 19/156 dead transitions. [2024-06-20 15:55:14,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 156 transitions, 1532 flow [2024-06-20 15:55:14,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:55:14,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:55:14,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-06-20 15:55:14,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38 [2024-06-20 15:55:14,847 INFO L175 Difference]: Start difference. First operand has 205 places, 142 transitions, 1150 flow. Second operand 10 states and 114 transitions. [2024-06-20 15:55:14,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 156 transitions, 1532 flow [2024-06-20 15:55:14,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 156 transitions, 1492 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-20 15:55:14,930 INFO L231 Difference]: Finished difference. Result has 196 places, 133 transitions, 1070 flow [2024-06-20 15:55:14,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1110, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1070, PETRI_PLACES=196, PETRI_TRANSITIONS=133} [2024-06-20 15:55:14,931 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 167 predicate places. [2024-06-20 15:55:14,931 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 133 transitions, 1070 flow [2024-06-20 15:55:14,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:55:14,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:14,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:14,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 15:55:14,931 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:55:14,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:14,931 INFO L85 PathProgramCache]: Analyzing trace with hash 2131754787, now seen corresponding path program 20 times [2024-06-20 15:55:14,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:14,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645244931] [2024-06-20 15:55:14,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:14,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:14,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:15,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:15,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:15,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645244931] [2024-06-20 15:55:15,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645244931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:15,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:15,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:55:15,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527563968] [2024-06-20 15:55:15,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:15,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:55:15,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:15,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:55:15,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:55:16,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:55:16,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 133 transitions, 1070 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:55:16,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:16,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:55:16,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:16,330 INFO L124 PetriNetUnfolderBase]: 273/555 cut-off events. [2024-06-20 15:55:16,330 INFO L125 PetriNetUnfolderBase]: For 30111/30111 co-relation queries the response was YES. [2024-06-20 15:55:16,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3143 conditions, 555 events. 273/555 cut-off events. For 30111/30111 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 2737 event pairs, 25 based on Foata normal form. 2/557 useless extension candidates. Maximal degree in co-relation 3060. Up to 447 conditions per place. [2024-06-20 15:55:16,334 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 124 selfloop transitions, 19 changer transitions 0/146 dead transitions. [2024-06-20 15:55:16,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 146 transitions, 1408 flow [2024-06-20 15:55:16,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:55:16,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:55:16,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-20 15:55:16,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-20 15:55:16,335 INFO L175 Difference]: Start difference. First operand has 196 places, 133 transitions, 1070 flow. Second operand 10 states and 110 transitions. [2024-06-20 15:55:16,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 146 transitions, 1408 flow [2024-06-20 15:55:16,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 146 transitions, 1368 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-06-20 15:55:16,402 INFO L231 Difference]: Finished difference. Result has 184 places, 134 transitions, 1102 flow [2024-06-20 15:55:16,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1032, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1102, PETRI_PLACES=184, PETRI_TRANSITIONS=134} [2024-06-20 15:55:16,402 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 155 predicate places. [2024-06-20 15:55:16,402 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 134 transitions, 1102 flow [2024-06-20 15:55:16,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:55:16,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:16,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:16,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 15:55:16,402 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:55:16,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:16,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1992390109, now seen corresponding path program 21 times [2024-06-20 15:55:16,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:16,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748038605] [2024-06-20 15:55:16,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:16,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:16,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:17,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:17,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:17,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748038605] [2024-06-20 15:55:17,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748038605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:17,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:17,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:55:17,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754448710] [2024-06-20 15:55:17,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:17,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:55:17,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:17,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:55:17,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:55:17,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:55:17,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 134 transitions, 1102 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:55:17,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:17,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:55:17,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:18,225 INFO L124 PetriNetUnfolderBase]: 277/563 cut-off events. [2024-06-20 15:55:18,225 INFO L125 PetriNetUnfolderBase]: For 26365/26365 co-relation queries the response was YES. [2024-06-20 15:55:18,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3142 conditions, 563 events. 277/563 cut-off events. For 26365/26365 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 2803 event pairs, 44 based on Foata normal form. 2/565 useless extension candidates. Maximal degree in co-relation 3064. Up to 466 conditions per place. [2024-06-20 15:55:18,229 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 117 selfloop transitions, 25 changer transitions 0/145 dead transitions. [2024-06-20 15:55:18,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 145 transitions, 1434 flow [2024-06-20 15:55:18,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:55:18,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:55:18,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-06-20 15:55:18,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38 [2024-06-20 15:55:18,230 INFO L175 Difference]: Start difference. First operand has 184 places, 134 transitions, 1102 flow. Second operand 10 states and 114 transitions. [2024-06-20 15:55:18,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 145 transitions, 1434 flow [2024-06-20 15:55:18,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 145 transitions, 1374 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-20 15:55:18,290 INFO L231 Difference]: Finished difference. Result has 186 places, 135 transitions, 1124 flow [2024-06-20 15:55:18,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1044, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1124, PETRI_PLACES=186, PETRI_TRANSITIONS=135} [2024-06-20 15:55:18,290 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 157 predicate places. [2024-06-20 15:55:18,290 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 135 transitions, 1124 flow [2024-06-20 15:55:18,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:55:18,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:18,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:18,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 15:55:18,291 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:55:18,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:18,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1992394759, now seen corresponding path program 22 times [2024-06-20 15:55:18,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:18,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950248057] [2024-06-20 15:55:18,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:18,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:18,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:19,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:19,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:19,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950248057] [2024-06-20 15:55:19,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950248057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:19,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:19,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:55:19,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169908621] [2024-06-20 15:55:19,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:19,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:55:19,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:19,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:55:19,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:55:19,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:55:19,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 135 transitions, 1124 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:55:19,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:19,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:55:19,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:19,807 INFO L124 PetriNetUnfolderBase]: 288/584 cut-off events. [2024-06-20 15:55:19,807 INFO L125 PetriNetUnfolderBase]: For 29704/29704 co-relation queries the response was YES. [2024-06-20 15:55:19,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3381 conditions, 584 events. 288/584 cut-off events. For 29704/29704 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 2937 event pairs, 37 based on Foata normal form. 2/586 useless extension candidates. Maximal degree in co-relation 3302. Up to 444 conditions per place. [2024-06-20 15:55:19,811 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 116 selfloop transitions, 30 changer transitions 0/149 dead transitions. [2024-06-20 15:55:19,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 149 transitions, 1600 flow [2024-06-20 15:55:19,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:55:19,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:55:19,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2024-06-20 15:55:19,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38666666666666666 [2024-06-20 15:55:19,812 INFO L175 Difference]: Start difference. First operand has 186 places, 135 transitions, 1124 flow. Second operand 10 states and 116 transitions. [2024-06-20 15:55:19,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 149 transitions, 1600 flow [2024-06-20 15:55:19,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 149 transitions, 1530 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-20 15:55:19,883 INFO L231 Difference]: Finished difference. Result has 188 places, 137 transitions, 1174 flow [2024-06-20 15:55:19,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1054, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1174, PETRI_PLACES=188, PETRI_TRANSITIONS=137} [2024-06-20 15:55:19,883 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 159 predicate places. [2024-06-20 15:55:19,883 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 137 transitions, 1174 flow [2024-06-20 15:55:19,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:55:19,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:19,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:19,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 15:55:19,884 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:55:19,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:19,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1481704669, now seen corresponding path program 23 times [2024-06-20 15:55:19,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:19,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218740592] [2024-06-20 15:55:19,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:19,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:19,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:21,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:21,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:21,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218740592] [2024-06-20 15:55:21,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218740592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:21,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:21,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:55:21,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097787507] [2024-06-20 15:55:21,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:21,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:55:21,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:21,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:55:21,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:55:21,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:55:21,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 137 transitions, 1174 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:55:21,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:21,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:55:21,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:21,445 INFO L124 PetriNetUnfolderBase]: 285/579 cut-off events. [2024-06-20 15:55:21,445 INFO L125 PetriNetUnfolderBase]: For 27581/27581 co-relation queries the response was YES. [2024-06-20 15:55:21,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3252 conditions, 579 events. 285/579 cut-off events. For 27581/27581 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 2903 event pairs, 42 based on Foata normal form. 2/581 useless extension candidates. Maximal degree in co-relation 3172. Up to 476 conditions per place. [2024-06-20 15:55:21,449 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 118 selfloop transitions, 26 changer transitions 0/147 dead transitions. [2024-06-20 15:55:21,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 147 transitions, 1484 flow [2024-06-20 15:55:21,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:55:21,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:55:21,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-06-20 15:55:21,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38 [2024-06-20 15:55:21,450 INFO L175 Difference]: Start difference. First operand has 188 places, 137 transitions, 1174 flow. Second operand 10 states and 114 transitions. [2024-06-20 15:55:21,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 147 transitions, 1484 flow [2024-06-20 15:55:21,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 147 transitions, 1408 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-20 15:55:21,516 INFO L231 Difference]: Finished difference. Result has 192 places, 137 transitions, 1156 flow [2024-06-20 15:55:21,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1098, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1156, PETRI_PLACES=192, PETRI_TRANSITIONS=137} [2024-06-20 15:55:21,517 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 163 predicate places. [2024-06-20 15:55:21,517 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 137 transitions, 1156 flow [2024-06-20 15:55:21,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:55:21,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:21,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:21,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 15:55:21,517 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:55:21,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:21,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1985723435, now seen corresponding path program 6 times [2024-06-20 15:55:21,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:21,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561912] [2024-06-20 15:55:21,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:21,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:21,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:22,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:22,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:22,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561912] [2024-06-20 15:55:22,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:22,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:22,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:55:22,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762874624] [2024-06-20 15:55:22,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:22,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:55:22,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:22,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:55:22,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:55:23,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:55:23,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 137 transitions, 1156 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:55:23,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:23,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:55:23,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:23,455 INFO L124 PetriNetUnfolderBase]: 297/607 cut-off events. [2024-06-20 15:55:23,455 INFO L125 PetriNetUnfolderBase]: For 36433/36433 co-relation queries the response was YES. [2024-06-20 15:55:23,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3354 conditions, 607 events. 297/607 cut-off events. For 36433/36433 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 3105 event pairs, 48 based on Foata normal form. 8/615 useless extension candidates. Maximal degree in co-relation 3272. Up to 472 conditions per place. [2024-06-20 15:55:23,459 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 112 selfloop transitions, 27 changer transitions 9/151 dead transitions. [2024-06-20 15:55:23,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 151 transitions, 1518 flow [2024-06-20 15:55:23,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:55:23,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:55:23,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-20 15:55:23,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38484848484848483 [2024-06-20 15:55:23,460 INFO L175 Difference]: Start difference. First operand has 192 places, 137 transitions, 1156 flow. Second operand 11 states and 127 transitions. [2024-06-20 15:55:23,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 151 transitions, 1518 flow [2024-06-20 15:55:23,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 151 transitions, 1458 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-20 15:55:23,528 INFO L231 Difference]: Finished difference. Result has 194 places, 134 transitions, 1126 flow [2024-06-20 15:55:23,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1096, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1126, PETRI_PLACES=194, PETRI_TRANSITIONS=134} [2024-06-20 15:55:23,528 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 165 predicate places. [2024-06-20 15:55:23,529 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 134 transitions, 1126 flow [2024-06-20 15:55:23,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:55:23,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:23,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:23,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 15:55:23,529 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:55:23,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:23,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1992210185, now seen corresponding path program 7 times [2024-06-20 15:55:23,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:23,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723256792] [2024-06-20 15:55:23,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:23,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:23,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:25,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:25,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:25,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723256792] [2024-06-20 15:55:25,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723256792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:25,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:25,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:55:25,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966205902] [2024-06-20 15:55:25,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:25,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:55:25,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:25,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:55:25,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:55:25,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:55:25,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 134 transitions, 1126 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:55:25,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:25,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:55:25,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:25,609 INFO L124 PetriNetUnfolderBase]: 292/602 cut-off events. [2024-06-20 15:55:25,609 INFO L125 PetriNetUnfolderBase]: For 38483/38483 co-relation queries the response was YES. [2024-06-20 15:55:25,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3325 conditions, 602 events. 292/602 cut-off events. For 38483/38483 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3086 event pairs, 50 based on Foata normal form. 8/610 useless extension candidates. Maximal degree in co-relation 3242. Up to 474 conditions per place. [2024-06-20 15:55:25,612 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 113 selfloop transitions, 23 changer transitions 9/148 dead transitions. [2024-06-20 15:55:25,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 148 transitions, 1482 flow [2024-06-20 15:55:25,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:55:25,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:55:25,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-20 15:55:25,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2024-06-20 15:55:25,613 INFO L175 Difference]: Start difference. First operand has 194 places, 134 transitions, 1126 flow. Second operand 11 states and 126 transitions. [2024-06-20 15:55:25,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 148 transitions, 1482 flow [2024-06-20 15:55:25,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 148 transitions, 1413 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-20 15:55:25,686 INFO L231 Difference]: Finished difference. Result has 193 places, 131 transitions, 1085 flow [2024-06-20 15:55:25,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1059, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1085, PETRI_PLACES=193, PETRI_TRANSITIONS=131} [2024-06-20 15:55:25,687 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 164 predicate places. [2024-06-20 15:55:25,687 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 131 transitions, 1085 flow [2024-06-20 15:55:25,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:55:25,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:25,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:25,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 15:55:25,687 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:55:25,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:25,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1481458715, now seen corresponding path program 8 times [2024-06-20 15:55:25,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:25,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404502551] [2024-06-20 15:55:25,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:25,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:25,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:27,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:27,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:27,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404502551] [2024-06-20 15:55:27,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404502551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:27,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:27,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:55:27,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012915104] [2024-06-20 15:55:27,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:27,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:55:27,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:27,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:55:27,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:55:27,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:55:27,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 131 transitions, 1085 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:55:27,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:27,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:55:27,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:27,499 INFO L124 PetriNetUnfolderBase]: 305/633 cut-off events. [2024-06-20 15:55:27,500 INFO L125 PetriNetUnfolderBase]: For 47285/47285 co-relation queries the response was YES. [2024-06-20 15:55:27,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3864 conditions, 633 events. 305/633 cut-off events. For 47285/47285 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3282 event pairs, 56 based on Foata normal form. 6/639 useless extension candidates. Maximal degree in co-relation 3782. Up to 454 conditions per place. [2024-06-20 15:55:27,503 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 117 selfloop transitions, 22 changer transitions 7/149 dead transitions. [2024-06-20 15:55:27,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 149 transitions, 1587 flow [2024-06-20 15:55:27,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:55:27,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:55:27,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-20 15:55:27,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39090909090909093 [2024-06-20 15:55:27,504 INFO L175 Difference]: Start difference. First operand has 193 places, 131 transitions, 1085 flow. Second operand 11 states and 129 transitions. [2024-06-20 15:55:27,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 149 transitions, 1587 flow [2024-06-20 15:55:27,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 149 transitions, 1525 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-20 15:55:27,576 INFO L231 Difference]: Finished difference. Result has 191 places, 128 transitions, 1055 flow [2024-06-20 15:55:27,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1031, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1055, PETRI_PLACES=191, PETRI_TRANSITIONS=128} [2024-06-20 15:55:27,577 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 162 predicate places. [2024-06-20 15:55:27,577 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 128 transitions, 1055 flow [2024-06-20 15:55:27,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:55:27,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:27,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:27,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 15:55:27,577 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:55:27,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:27,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1481697725, now seen corresponding path program 9 times [2024-06-20 15:55:27,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:27,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506945700] [2024-06-20 15:55:27,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:27,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:27,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:28,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:28,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:28,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506945700] [2024-06-20 15:55:28,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506945700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:28,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:28,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:55:28,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091233609] [2024-06-20 15:55:28,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:28,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:55:28,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:28,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:55:28,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:55:28,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:55:28,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 128 transitions, 1055 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:55:28,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:28,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:55:28,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:29,323 INFO L124 PetriNetUnfolderBase]: 280/578 cut-off events. [2024-06-20 15:55:29,323 INFO L125 PetriNetUnfolderBase]: For 37089/37089 co-relation queries the response was YES. [2024-06-20 15:55:29,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3167 conditions, 578 events. 280/578 cut-off events. For 37089/37089 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 2943 event pairs, 48 based on Foata normal form. 8/586 useless extension candidates. Maximal degree in co-relation 3086. Up to 454 conditions per place. [2024-06-20 15:55:29,326 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 109 selfloop transitions, 21 changer transitions 9/142 dead transitions. [2024-06-20 15:55:29,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 142 transitions, 1395 flow [2024-06-20 15:55:29,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:55:29,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:55:29,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 125 transitions. [2024-06-20 15:55:29,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787878787878788 [2024-06-20 15:55:29,327 INFO L175 Difference]: Start difference. First operand has 191 places, 128 transitions, 1055 flow. Second operand 11 states and 125 transitions. [2024-06-20 15:55:29,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 142 transitions, 1395 flow [2024-06-20 15:55:29,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 142 transitions, 1333 flow, removed 3 selfloop flow, removed 14 redundant places. [2024-06-20 15:55:29,381 INFO L231 Difference]: Finished difference. Result has 186 places, 125 transitions, 1014 flow [2024-06-20 15:55:29,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1014, PETRI_PLACES=186, PETRI_TRANSITIONS=125} [2024-06-20 15:55:29,382 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 157 predicate places. [2024-06-20 15:55:29,382 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 125 transitions, 1014 flow [2024-06-20 15:55:29,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:55:29,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:29,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:29,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 15:55:29,382 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:55:29,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:29,383 INFO L85 PathProgramCache]: Analyzing trace with hash 273118149, now seen corresponding path program 24 times [2024-06-20 15:55:29,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:29,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048164093] [2024-06-20 15:55:29,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:29,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:29,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:30,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:30,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:30,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048164093] [2024-06-20 15:55:30,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048164093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:30,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:30,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:55:30,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147920552] [2024-06-20 15:55:30,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:30,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:55:30,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:30,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:55:30,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:55:30,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:55:30,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 125 transitions, 1014 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:55:30,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:30,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:55:30,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:30,933 INFO L124 PetriNetUnfolderBase]: 267/551 cut-off events. [2024-06-20 15:55:30,933 INFO L125 PetriNetUnfolderBase]: For 25994/25994 co-relation queries the response was YES. [2024-06-20 15:55:30,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3026 conditions, 551 events. 267/551 cut-off events. For 25994/25994 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 2741 event pairs, 47 based on Foata normal form. 2/553 useless extension candidates. Maximal degree in co-relation 2948. Up to 456 conditions per place. [2024-06-20 15:55:30,937 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 106 selfloop transitions, 25 changer transitions 0/134 dead transitions. [2024-06-20 15:55:30,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 134 transitions, 1318 flow [2024-06-20 15:55:30,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:55:30,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:55:30,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-06-20 15:55:30,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38 [2024-06-20 15:55:30,937 INFO L175 Difference]: Start difference. First operand has 186 places, 125 transitions, 1014 flow. Second operand 10 states and 114 transitions. [2024-06-20 15:55:30,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 134 transitions, 1318 flow [2024-06-20 15:55:30,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 134 transitions, 1272 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 15:55:30,990 INFO L231 Difference]: Finished difference. Result has 182 places, 126 transitions, 1050 flow [2024-06-20 15:55:30,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=968, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1050, PETRI_PLACES=182, PETRI_TRANSITIONS=126} [2024-06-20 15:55:30,991 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 153 predicate places. [2024-06-20 15:55:30,991 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 126 transitions, 1050 flow [2024-06-20 15:55:30,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:55:30,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:30,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:30,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 15:55:30,991 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:55:30,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:30,992 INFO L85 PathProgramCache]: Analyzing trace with hash 266862039, now seen corresponding path program 25 times [2024-06-20 15:55:30,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:30,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300988070] [2024-06-20 15:55:30,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:30,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:32,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:32,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:32,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300988070] [2024-06-20 15:55:32,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300988070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:32,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:32,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:55:32,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959585929] [2024-06-20 15:55:32,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:32,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:55:32,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:32,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:55:32,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:55:32,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:55:32,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 126 transitions, 1050 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:55:32,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:32,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:55:32,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:32,762 INFO L124 PetriNetUnfolderBase]: 271/559 cut-off events. [2024-06-20 15:55:32,762 INFO L125 PetriNetUnfolderBase]: For 25450/25450 co-relation queries the response was YES. [2024-06-20 15:55:32,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3096 conditions, 559 events. 271/559 cut-off events. For 25450/25450 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 2810 event pairs, 47 based on Foata normal form. 2/561 useless extension candidates. Maximal degree in co-relation 3019. Up to 464 conditions per place. [2024-06-20 15:55:32,765 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 107 selfloop transitions, 25 changer transitions 0/135 dead transitions. [2024-06-20 15:55:32,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 135 transitions, 1358 flow [2024-06-20 15:55:32,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:55:32,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:55:32,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-20 15:55:32,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-20 15:55:32,766 INFO L175 Difference]: Start difference. First operand has 182 places, 126 transitions, 1050 flow. Second operand 10 states and 115 transitions. [2024-06-20 15:55:32,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 135 transitions, 1358 flow [2024-06-20 15:55:32,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 135 transitions, 1286 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-20 15:55:32,824 INFO L231 Difference]: Finished difference. Result has 184 places, 127 transitions, 1062 flow [2024-06-20 15:55:32,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1062, PETRI_PLACES=184, PETRI_TRANSITIONS=127} [2024-06-20 15:55:32,824 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 155 predicate places. [2024-06-20 15:55:32,824 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 127 transitions, 1062 flow [2024-06-20 15:55:32,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:55:32,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:32,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:32,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 15:55:32,825 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:55:32,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:32,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1855781087, now seen corresponding path program 26 times [2024-06-20 15:55:32,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:32,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210144511] [2024-06-20 15:55:32,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:32,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:32,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:34,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:34,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:34,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210144511] [2024-06-20 15:55:34,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210144511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:34,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:34,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:55:34,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747566515] [2024-06-20 15:55:34,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:34,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:55:34,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:34,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:55:34,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:55:34,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:55:34,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 127 transitions, 1062 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:55:34,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:34,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:55:34,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:34,427 INFO L124 PetriNetUnfolderBase]: 275/567 cut-off events. [2024-06-20 15:55:34,427 INFO L125 PetriNetUnfolderBase]: For 26571/26571 co-relation queries the response was YES. [2024-06-20 15:55:34,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3149 conditions, 567 events. 275/567 cut-off events. For 26571/26571 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 2840 event pairs, 47 based on Foata normal form. 2/569 useless extension candidates. Maximal degree in co-relation 3071. Up to 418 conditions per place. [2024-06-20 15:55:34,430 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 92 selfloop transitions, 41 changer transitions 0/136 dead transitions. [2024-06-20 15:55:34,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 136 transitions, 1374 flow [2024-06-20 15:55:34,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:55:34,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:55:34,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-20 15:55:34,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39 [2024-06-20 15:55:34,431 INFO L175 Difference]: Start difference. First operand has 184 places, 127 transitions, 1062 flow. Second operand 10 states and 117 transitions. [2024-06-20 15:55:34,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 136 transitions, 1374 flow [2024-06-20 15:55:34,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 136 transitions, 1300 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-20 15:55:34,486 INFO L231 Difference]: Finished difference. Result has 186 places, 128 transitions, 1106 flow [2024-06-20 15:55:34,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=988, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1106, PETRI_PLACES=186, PETRI_TRANSITIONS=128} [2024-06-20 15:55:34,487 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 157 predicate places. [2024-06-20 15:55:34,487 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 128 transitions, 1106 flow [2024-06-20 15:55:34,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:55:34,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:34,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:34,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 15:55:34,487 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:55:34,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:34,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1849524977, now seen corresponding path program 27 times [2024-06-20 15:55:34,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:34,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85187536] [2024-06-20 15:55:34,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:34,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:34,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:35,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:35,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:35,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85187536] [2024-06-20 15:55:35,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85187536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:35,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:35,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:55:35,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809665137] [2024-06-20 15:55:35,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:35,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:55:35,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:35,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:55:35,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:55:35,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:55:35,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 128 transitions, 1106 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:55:35,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:35,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:55:35,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:36,064 INFO L124 PetriNetUnfolderBase]: 279/575 cut-off events. [2024-06-20 15:55:36,064 INFO L125 PetriNetUnfolderBase]: For 27700/27700 co-relation queries the response was YES. [2024-06-20 15:55:36,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3234 conditions, 575 events. 279/575 cut-off events. For 27700/27700 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 2896 event pairs, 49 based on Foata normal form. 2/577 useless extension candidates. Maximal degree in co-relation 3155. Up to 426 conditions per place. [2024-06-20 15:55:36,068 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 92 selfloop transitions, 42 changer transitions 0/137 dead transitions. [2024-06-20 15:55:36,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 137 transitions, 1422 flow [2024-06-20 15:55:36,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:55:36,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:55:36,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2024-06-20 15:55:36,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38666666666666666 [2024-06-20 15:55:36,069 INFO L175 Difference]: Start difference. First operand has 186 places, 128 transitions, 1106 flow. Second operand 10 states and 116 transitions. [2024-06-20 15:55:36,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 137 transitions, 1422 flow [2024-06-20 15:55:36,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 137 transitions, 1314 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-20 15:55:36,135 INFO L231 Difference]: Finished difference. Result has 188 places, 129 transitions, 1120 flow [2024-06-20 15:55:36,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=998, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1120, PETRI_PLACES=188, PETRI_TRANSITIONS=129} [2024-06-20 15:55:36,135 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 159 predicate places. [2024-06-20 15:55:36,136 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 129 transitions, 1120 flow [2024-06-20 15:55:36,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:55:36,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:36,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:36,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 15:55:36,136 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:55:36,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:36,136 INFO L85 PathProgramCache]: Analyzing trace with hash -613536957, now seen corresponding path program 28 times [2024-06-20 15:55:36,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:36,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071178867] [2024-06-20 15:55:36,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:36,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:36,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:37,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:37,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:37,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071178867] [2024-06-20 15:55:37,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071178867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:37,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:37,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:55:37,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589984396] [2024-06-20 15:55:37,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:37,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:55:37,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:37,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:55:37,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:55:37,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:55:37,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 129 transitions, 1120 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:55:37,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:37,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:55:37,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:38,045 INFO L124 PetriNetUnfolderBase]: 290/596 cut-off events. [2024-06-20 15:55:38,046 INFO L125 PetriNetUnfolderBase]: For 32308/32308 co-relation queries the response was YES. [2024-06-20 15:55:38,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3521 conditions, 596 events. 290/596 cut-off events. For 32308/32308 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3051 event pairs, 50 based on Foata normal form. 2/598 useless extension candidates. Maximal degree in co-relation 3441. Up to 418 conditions per place. [2024-06-20 15:55:38,050 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 93 selfloop transitions, 45 changer transitions 0/141 dead transitions. [2024-06-20 15:55:38,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 141 transitions, 1594 flow [2024-06-20 15:55:38,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:55:38,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:55:38,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 118 transitions. [2024-06-20 15:55:38,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3933333333333333 [2024-06-20 15:55:38,051 INFO L175 Difference]: Start difference. First operand has 188 places, 129 transitions, 1120 flow. Second operand 10 states and 118 transitions. [2024-06-20 15:55:38,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 141 transitions, 1594 flow [2024-06-20 15:55:38,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 141 transitions, 1482 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-20 15:55:38,124 INFO L231 Difference]: Finished difference. Result has 190 places, 131 transitions, 1172 flow [2024-06-20 15:55:38,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1008, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1172, PETRI_PLACES=190, PETRI_TRANSITIONS=131} [2024-06-20 15:55:38,125 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 161 predicate places. [2024-06-20 15:55:38,125 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 131 transitions, 1172 flow [2024-06-20 15:55:38,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:55:38,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:38,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:38,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 15:55:38,125 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:55:38,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:38,126 INFO L85 PathProgramCache]: Analyzing trace with hash -613352383, now seen corresponding path program 10 times [2024-06-20 15:55:38,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:38,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985963001] [2024-06-20 15:55:38,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:38,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:38,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:39,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:39,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:39,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985963001] [2024-06-20 15:55:39,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985963001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:39,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:39,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:55:39,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768208114] [2024-06-20 15:55:39,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:39,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:55:39,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:39,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:55:39,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:55:39,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:55:39,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 131 transitions, 1172 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:55:39,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:39,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:55:39,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:40,269 INFO L124 PetriNetUnfolderBase]: 302/628 cut-off events. [2024-06-20 15:55:40,269 INFO L125 PetriNetUnfolderBase]: For 42522/42522 co-relation queries the response was YES. [2024-06-20 15:55:40,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3632 conditions, 628 events. 302/628 cut-off events. For 42522/42522 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3297 event pairs, 60 based on Foata normal form. 8/636 useless extension candidates. Maximal degree in co-relation 3551. Up to 436 conditions per place. [2024-06-20 15:55:40,273 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 89 selfloop transitions, 38 changer transitions 13/143 dead transitions. [2024-06-20 15:55:40,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 143 transitions, 1508 flow [2024-06-20 15:55:40,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:55:40,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:55:40,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-20 15:55:40,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39090909090909093 [2024-06-20 15:55:40,274 INFO L175 Difference]: Start difference. First operand has 190 places, 131 transitions, 1172 flow. Second operand 11 states and 129 transitions. [2024-06-20 15:55:40,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 143 transitions, 1508 flow [2024-06-20 15:55:40,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 143 transitions, 1418 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 15:55:40,351 INFO L231 Difference]: Finished difference. Result has 195 places, 125 transitions, 1116 flow [2024-06-20 15:55:40,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1082, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1116, PETRI_PLACES=195, PETRI_TRANSITIONS=125} [2024-06-20 15:55:40,352 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 166 predicate places. [2024-06-20 15:55:40,352 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 125 transitions, 1116 flow [2024-06-20 15:55:40,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:55:40,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:40,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:40,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 15:55:40,352 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:55:40,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:40,353 INFO L85 PathProgramCache]: Analyzing trace with hash 243037157, now seen corresponding path program 11 times [2024-06-20 15:55:40,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:40,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489781631] [2024-06-20 15:55:40,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:40,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:40,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:41,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:41,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:41,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489781631] [2024-06-20 15:55:41,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489781631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:41,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:41,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:55:41,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255090439] [2024-06-20 15:55:41,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:41,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:55:41,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:41,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:55:41,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:55:41,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:55:41,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 125 transitions, 1116 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:55:41,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:41,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:55:41,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:42,281 INFO L124 PetriNetUnfolderBase]: 308/646 cut-off events. [2024-06-20 15:55:42,281 INFO L125 PetriNetUnfolderBase]: For 51826/51826 co-relation queries the response was YES. [2024-06-20 15:55:42,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4150 conditions, 646 events. 308/646 cut-off events. For 51826/51826 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3391 event pairs, 64 based on Foata normal form. 6/652 useless extension candidates. Maximal degree in co-relation 4067. Up to 370 conditions per place. [2024-06-20 15:55:42,286 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 84 selfloop transitions, 47 changer transitions 6/140 dead transitions. [2024-06-20 15:55:42,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 140 transitions, 1590 flow [2024-06-20 15:55:42,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:55:42,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:55:42,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 126 transitions. [2024-06-20 15:55:42,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42 [2024-06-20 15:55:42,286 INFO L175 Difference]: Start difference. First operand has 195 places, 125 transitions, 1116 flow. Second operand 10 states and 126 transitions. [2024-06-20 15:55:42,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 140 transitions, 1590 flow [2024-06-20 15:55:42,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 140 transitions, 1487 flow, removed 10 selfloop flow, removed 12 redundant places. [2024-06-20 15:55:42,360 INFO L231 Difference]: Finished difference. Result has 187 places, 123 transitions, 1106 flow [2024-06-20 15:55:42,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1021, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1106, PETRI_PLACES=187, PETRI_TRANSITIONS=123} [2024-06-20 15:55:42,360 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 158 predicate places. [2024-06-20 15:55:42,360 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 123 transitions, 1106 flow [2024-06-20 15:55:42,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:55:42,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:42,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:42,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 15:55:42,361 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:55:42,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:42,361 INFO L85 PathProgramCache]: Analyzing trace with hash 266684409, now seen corresponding path program 29 times [2024-06-20 15:55:42,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:42,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567250298] [2024-06-20 15:55:42,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:42,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:42,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:43,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:43,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:43,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567250298] [2024-06-20 15:55:43,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567250298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:43,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:43,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:55:43,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713237266] [2024-06-20 15:55:43,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:43,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:55:43,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:43,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:55:43,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:55:43,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:55:43,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 123 transitions, 1106 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:55:43,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:43,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:55:43,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:44,029 INFO L124 PetriNetUnfolderBase]: 298/620 cut-off events. [2024-06-20 15:55:44,029 INFO L125 PetriNetUnfolderBase]: For 41766/41766 co-relation queries the response was YES. [2024-06-20 15:55:44,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4029 conditions, 620 events. 298/620 cut-off events. For 41766/41766 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3212 event pairs, 64 based on Foata normal form. 2/622 useless extension candidates. Maximal degree in co-relation 3949. Up to 505 conditions per place. [2024-06-20 15:55:44,033 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 103 selfloop transitions, 27 changer transitions 0/133 dead transitions. [2024-06-20 15:55:44,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 133 transitions, 1418 flow [2024-06-20 15:55:44,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:55:44,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:55:44,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2024-06-20 15:55:44,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38666666666666666 [2024-06-20 15:55:44,034 INFO L175 Difference]: Start difference. First operand has 187 places, 123 transitions, 1106 flow. Second operand 10 states and 116 transitions. [2024-06-20 15:55:44,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 133 transitions, 1418 flow [2024-06-20 15:55:44,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 133 transitions, 1325 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-20 15:55:44,113 INFO L231 Difference]: Finished difference. Result has 186 places, 124 transitions, 1107 flow [2024-06-20 15:55:44,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1013, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1107, PETRI_PLACES=186, PETRI_TRANSITIONS=124} [2024-06-20 15:55:44,113 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 157 predicate places. [2024-06-20 15:55:44,113 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 124 transitions, 1107 flow [2024-06-20 15:55:44,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:55:44,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:44,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:44,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 15:55:44,114 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:55:44,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:44,114 INFO L85 PathProgramCache]: Analyzing trace with hash -607096273, now seen corresponding path program 12 times [2024-06-20 15:55:44,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:44,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718971918] [2024-06-20 15:55:44,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:44,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:44,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:45,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:45,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:45,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718971918] [2024-06-20 15:55:45,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718971918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:45,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:45,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:55:45,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199669890] [2024-06-20 15:55:45,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:45,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:55:45,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:45,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:55:45,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:55:45,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:55:45,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 124 transitions, 1107 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:55:45,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:45,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:55:45,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:46,361 INFO L124 PetriNetUnfolderBase]: 310/648 cut-off events. [2024-06-20 15:55:46,361 INFO L125 PetriNetUnfolderBase]: For 48811/48811 co-relation queries the response was YES. [2024-06-20 15:55:46,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4110 conditions, 648 events. 310/648 cut-off events. For 48811/48811 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3428 event pairs, 72 based on Foata normal form. 8/656 useless extension candidates. Maximal degree in co-relation 4031. Up to 473 conditions per place. [2024-06-20 15:55:46,365 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 88 selfloop transitions, 36 changer transitions 9/136 dead transitions. [2024-06-20 15:55:46,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 136 transitions, 1429 flow [2024-06-20 15:55:46,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:55:46,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:55:46,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 128 transitions. [2024-06-20 15:55:46,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3878787878787879 [2024-06-20 15:55:46,366 INFO L175 Difference]: Start difference. First operand has 186 places, 124 transitions, 1107 flow. Second operand 11 states and 128 transitions. [2024-06-20 15:55:46,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 136 transitions, 1429 flow [2024-06-20 15:55:46,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 136 transitions, 1345 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-20 15:55:46,433 INFO L231 Difference]: Finished difference. Result has 189 places, 121 transitions, 1076 flow [2024-06-20 15:55:46,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1023, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1076, PETRI_PLACES=189, PETRI_TRANSITIONS=121} [2024-06-20 15:55:46,434 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 160 predicate places. [2024-06-20 15:55:46,434 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 121 transitions, 1076 flow [2024-06-20 15:55:46,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:55:46,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:46,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:46,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 15:55:46,435 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:55:46,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:46,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1856018671, now seen corresponding path program 13 times [2024-06-20 15:55:46,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:46,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28978763] [2024-06-20 15:55:46,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:46,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:46,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:47,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:47,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:47,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28978763] [2024-06-20 15:55:47,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28978763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:47,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:47,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:55:47,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079938837] [2024-06-20 15:55:47,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:47,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:55:47,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:47,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:55:47,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:55:47,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:55:47,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 121 transitions, 1076 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:55:47,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:47,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:55:47,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:48,207 INFO L124 PetriNetUnfolderBase]: 298/632 cut-off events. [2024-06-20 15:55:48,207 INFO L125 PetriNetUnfolderBase]: For 46932/46932 co-relation queries the response was YES. [2024-06-20 15:55:48,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3851 conditions, 632 events. 298/632 cut-off events. For 46932/46932 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3310 event pairs, 73 based on Foata normal form. 8/640 useless extension candidates. Maximal degree in co-relation 3771. Up to 450 conditions per place. [2024-06-20 15:55:48,211 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 85 selfloop transitions, 34 changer transitions 11/133 dead transitions. [2024-06-20 15:55:48,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 133 transitions, 1392 flow [2024-06-20 15:55:48,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:55:48,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:55:48,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 128 transitions. [2024-06-20 15:55:48,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3878787878787879 [2024-06-20 15:55:48,212 INFO L175 Difference]: Start difference. First operand has 189 places, 121 transitions, 1076 flow. Second operand 11 states and 128 transitions. [2024-06-20 15:55:48,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 133 transitions, 1392 flow [2024-06-20 15:55:48,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 133 transitions, 1316 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 15:55:48,283 INFO L231 Difference]: Finished difference. Result has 187 places, 117 transitions, 1042 flow [2024-06-20 15:55:48,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1000, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1042, PETRI_PLACES=187, PETRI_TRANSITIONS=117} [2024-06-20 15:55:48,284 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 158 predicate places. [2024-06-20 15:55:48,284 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 117 transitions, 1042 flow [2024-06-20 15:55:48,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:55:48,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:48,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:48,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 15:55:48,284 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:55:48,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:48,285 INFO L85 PathProgramCache]: Analyzing trace with hash -960176175, now seen corresponding path program 14 times [2024-06-20 15:55:48,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:48,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642500453] [2024-06-20 15:55:48,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:48,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:48,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:49,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:49,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:49,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642500453] [2024-06-20 15:55:49,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642500453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:49,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:49,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:55:49,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267457717] [2024-06-20 15:55:49,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:49,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:55:49,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:49,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:55:49,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:55:49,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:55:49,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 117 transitions, 1042 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:55:49,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:49,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:55:49,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:49,914 INFO L124 PetriNetUnfolderBase]: 313/669 cut-off events. [2024-06-20 15:55:49,914 INFO L125 PetriNetUnfolderBase]: For 53099/53099 co-relation queries the response was YES. [2024-06-20 15:55:49,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4380 conditions, 669 events. 313/669 cut-off events. For 53099/53099 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3575 event pairs, 108 based on Foata normal form. 6/675 useless extension candidates. Maximal degree in co-relation 4301. Up to 509 conditions per place. [2024-06-20 15:55:49,918 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 106 selfloop transitions, 23 changer transitions 6/138 dead transitions. [2024-06-20 15:55:49,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 138 transitions, 1526 flow [2024-06-20 15:55:49,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:55:49,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:55:49,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 142 transitions. [2024-06-20 15:55:49,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39444444444444443 [2024-06-20 15:55:49,919 INFO L175 Difference]: Start difference. First operand has 187 places, 117 transitions, 1042 flow. Second operand 12 states and 142 transitions. [2024-06-20 15:55:49,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 138 transitions, 1526 flow [2024-06-20 15:55:50,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 138 transitions, 1448 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-20 15:55:50,004 INFO L231 Difference]: Finished difference. Result has 185 places, 117 transitions, 1015 flow [2024-06-20 15:55:50,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1015, PETRI_PLACES=185, PETRI_TRANSITIONS=117} [2024-06-20 15:55:50,005 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 156 predicate places. [2024-06-20 15:55:50,005 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 117 transitions, 1015 flow [2024-06-20 15:55:50,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:55:50,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:50,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:50,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 15:55:50,005 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:55:50,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:50,005 INFO L85 PathProgramCache]: Analyzing trace with hash -960184545, now seen corresponding path program 15 times [2024-06-20 15:55:50,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:50,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893498207] [2024-06-20 15:55:50,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:50,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:50,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:51,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:51,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:51,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893498207] [2024-06-20 15:55:51,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893498207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:51,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:51,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:55:51,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145808862] [2024-06-20 15:55:51,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:51,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:55:51,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:51,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:55:51,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:55:51,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:55:51,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 117 transitions, 1015 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:55:51,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:51,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:55:51,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:51,689 INFO L124 PetriNetUnfolderBase]: 289/613 cut-off events. [2024-06-20 15:55:51,689 INFO L125 PetriNetUnfolderBase]: For 45175/45175 co-relation queries the response was YES. [2024-06-20 15:55:51,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3734 conditions, 613 events. 289/613 cut-off events. For 45175/45175 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3185 event pairs, 98 based on Foata normal form. 8/621 useless extension candidates. Maximal degree in co-relation 3656. Up to 509 conditions per place. [2024-06-20 15:55:51,693 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 98 selfloop transitions, 20 changer transitions 11/132 dead transitions. [2024-06-20 15:55:51,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 132 transitions, 1337 flow [2024-06-20 15:55:51,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:55:51,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:55:51,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 137 transitions. [2024-06-20 15:55:51,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38055555555555554 [2024-06-20 15:55:51,694 INFO L175 Difference]: Start difference. First operand has 185 places, 117 transitions, 1015 flow. Second operand 12 states and 137 transitions. [2024-06-20 15:55:51,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 132 transitions, 1337 flow [2024-06-20 15:55:51,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 132 transitions, 1298 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-20 15:55:51,762 INFO L231 Difference]: Finished difference. Result has 186 places, 113 transitions, 990 flow [2024-06-20 15:55:51,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=976, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=990, PETRI_PLACES=186, PETRI_TRANSITIONS=113} [2024-06-20 15:55:51,763 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 157 predicate places. [2024-06-20 15:55:51,763 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 113 transitions, 990 flow [2024-06-20 15:55:51,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:55:51,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:51,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:51,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 15:55:51,763 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:55:51,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:51,764 INFO L85 PathProgramCache]: Analyzing trace with hash 273125093, now seen corresponding path program 16 times [2024-06-20 15:55:51,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:51,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028814114] [2024-06-20 15:55:51,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:51,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:51,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:53,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:53,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:53,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028814114] [2024-06-20 15:55:53,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028814114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:53,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:53,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:55:53,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759358003] [2024-06-20 15:55:53,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:53,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:55:53,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:53,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:55:53,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:55:53,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:55:53,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 113 transitions, 990 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:55:53,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:53,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:55:53,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:53,783 INFO L124 PetriNetUnfolderBase]: 283/605 cut-off events. [2024-06-20 15:55:53,783 INFO L125 PetriNetUnfolderBase]: For 43489/43489 co-relation queries the response was YES. [2024-06-20 15:55:53,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3671 conditions, 605 events. 283/605 cut-off events. For 43489/43489 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3151 event pairs, 73 based on Foata normal form. 8/613 useless extension candidates. Maximal degree in co-relation 3594. Up to 460 conditions per place. [2024-06-20 15:55:53,787 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 87 selfloop transitions, 25 changer transitions 10/125 dead transitions. [2024-06-20 15:55:53,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 125 transitions, 1290 flow [2024-06-20 15:55:53,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:55:53,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:55:53,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-20 15:55:53,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39090909090909093 [2024-06-20 15:55:53,788 INFO L175 Difference]: Start difference. First operand has 186 places, 113 transitions, 990 flow. Second operand 11 states and 129 transitions. [2024-06-20 15:55:53,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 125 transitions, 1290 flow [2024-06-20 15:55:53,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 125 transitions, 1248 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-20 15:55:53,855 INFO L231 Difference]: Finished difference. Result has 182 places, 107 transitions, 964 flow [2024-06-20 15:55:53,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=964, PETRI_PLACES=182, PETRI_TRANSITIONS=107} [2024-06-20 15:55:53,855 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 153 predicate places. [2024-06-20 15:55:53,855 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 107 transitions, 964 flow [2024-06-20 15:55:53,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:55:53,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:53,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:53,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 15:55:53,856 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:55:53,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:53,856 INFO L85 PathProgramCache]: Analyzing trace with hash 273364103, now seen corresponding path program 17 times [2024-06-20 15:55:53,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:53,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365441720] [2024-06-20 15:55:53,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:53,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:53,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:55,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:55,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:55,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365441720] [2024-06-20 15:55:55,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365441720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:55,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:55,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:55:55,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127709659] [2024-06-20 15:55:55,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:55,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:55:55,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:55,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:55:55,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:55:55,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:55:55,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 107 transitions, 964 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:55:55,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:55,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:55:55,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:55,541 INFO L124 PetriNetUnfolderBase]: 291/631 cut-off events. [2024-06-20 15:55:55,541 INFO L125 PetriNetUnfolderBase]: For 51061/51061 co-relation queries the response was YES. [2024-06-20 15:55:55,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4200 conditions, 631 events. 291/631 cut-off events. For 51061/51061 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3345 event pairs, 81 based on Foata normal form. 6/637 useless extension candidates. Maximal degree in co-relation 4123. Up to 452 conditions per place. [2024-06-20 15:55:55,545 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 90 selfloop transitions, 23 changer transitions 7/123 dead transitions. [2024-06-20 15:55:55,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 123 transitions, 1396 flow [2024-06-20 15:55:55,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:55:55,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:55:55,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-20 15:55:55,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39090909090909093 [2024-06-20 15:55:55,546 INFO L175 Difference]: Start difference. First operand has 182 places, 107 transitions, 964 flow. Second operand 11 states and 129 transitions. [2024-06-20 15:55:55,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 123 transitions, 1396 flow [2024-06-20 15:55:55,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 123 transitions, 1315 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-20 15:55:55,619 INFO L231 Difference]: Finished difference. Result has 178 places, 104 transitions, 916 flow [2024-06-20 15:55:55,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=887, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=916, PETRI_PLACES=178, PETRI_TRANSITIONS=104} [2024-06-20 15:55:55,619 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 149 predicate places. [2024-06-20 15:55:55,619 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 104 transitions, 916 flow [2024-06-20 15:55:55,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:55:55,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:55,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:55,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 15:55:55,619 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:55:55,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:55,620 INFO L85 PathProgramCache]: Analyzing trace with hash -753912441, now seen corresponding path program 30 times [2024-06-20 15:55:55,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:55,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717366644] [2024-06-20 15:55:55,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:55,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:55,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:56,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:56,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:56,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717366644] [2024-06-20 15:55:56,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717366644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:56,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:56,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:55:56,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138888889] [2024-06-20 15:55:56,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:56,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:55:56,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:56,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:55:56,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:55:56,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:55:56,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 104 transitions, 916 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:55:56,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:56,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:55:56,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:57,141 INFO L124 PetriNetUnfolderBase]: 288/622 cut-off events. [2024-06-20 15:55:57,141 INFO L125 PetriNetUnfolderBase]: For 52029/52029 co-relation queries the response was YES. [2024-06-20 15:55:57,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4130 conditions, 622 events. 288/622 cut-off events. For 52029/52029 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3260 event pairs, 81 based on Foata normal form. 8/630 useless extension candidates. Maximal degree in co-relation 4055. Up to 510 conditions per place. [2024-06-20 15:55:57,145 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 88 selfloop transitions, 14 changer transitions 11/116 dead transitions. [2024-06-20 15:55:57,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 116 transitions, 1208 flow [2024-06-20 15:55:57,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:55:57,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:55:57,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-06-20 15:55:57,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37333333333333335 [2024-06-20 15:55:57,146 INFO L175 Difference]: Start difference. First operand has 178 places, 104 transitions, 916 flow. Second operand 10 states and 112 transitions. [2024-06-20 15:55:57,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 116 transitions, 1208 flow [2024-06-20 15:55:57,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 116 transitions, 1158 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-20 15:55:57,219 INFO L231 Difference]: Finished difference. Result has 174 places, 101 transitions, 876 flow [2024-06-20 15:55:57,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=866, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=876, PETRI_PLACES=174, PETRI_TRANSITIONS=101} [2024-06-20 15:55:57,219 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 145 predicate places. [2024-06-20 15:55:57,219 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 101 transitions, 876 flow [2024-06-20 15:55:57,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:55:57,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:57,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:57,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-20 15:55:57,219 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:55:57,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:57,220 INFO L85 PathProgramCache]: Analyzing trace with hash -950056845, now seen corresponding path program 18 times [2024-06-20 15:55:57,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:57,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173425783] [2024-06-20 15:55:57,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:57,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:57,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:55:58,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:55:58,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:55:58,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173425783] [2024-06-20 15:55:58,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173425783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:55:58,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:55:58,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:55:58,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227067610] [2024-06-20 15:55:58,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:55:58,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:55:58,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:55:58,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:55:58,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:55:59,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:55:59,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 101 transitions, 876 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:55:59,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:55:59,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:55:59,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:55:59,468 INFO L124 PetriNetUnfolderBase]: 292/634 cut-off events. [2024-06-20 15:55:59,468 INFO L125 PetriNetUnfolderBase]: For 52486/52486 co-relation queries the response was YES. [2024-06-20 15:55:59,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4336 conditions, 634 events. 292/634 cut-off events. For 52486/52486 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3343 event pairs, 115 based on Foata normal form. 6/640 useless extension candidates. Maximal degree in co-relation 4263. Up to 466 conditions per place. [2024-06-20 15:55:59,472 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 90 selfloop transitions, 18 changer transitions 10/121 dead transitions. [2024-06-20 15:55:59,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 121 transitions, 1308 flow [2024-06-20 15:55:59,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:55:59,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:55:59,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 140 transitions. [2024-06-20 15:55:59,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-20 15:55:59,473 INFO L175 Difference]: Start difference. First operand has 174 places, 101 transitions, 876 flow. Second operand 12 states and 140 transitions. [2024-06-20 15:55:59,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 121 transitions, 1308 flow [2024-06-20 15:55:59,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 121 transitions, 1249 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-20 15:55:59,553 INFO L231 Difference]: Finished difference. Result has 171 places, 97 transitions, 834 flow [2024-06-20 15:55:59,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=821, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=834, PETRI_PLACES=171, PETRI_TRANSITIONS=97} [2024-06-20 15:55:59,553 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 142 predicate places. [2024-06-20 15:55:59,553 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 97 transitions, 834 flow [2024-06-20 15:55:59,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:55:59,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:55:59,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:55:59,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-20 15:55:59,554 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:55:59,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:55:59,554 INFO L85 PathProgramCache]: Analyzing trace with hash -385458177, now seen corresponding path program 31 times [2024-06-20 15:55:59,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:55:59,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572098281] [2024-06-20 15:55:59,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:55:59,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:55:59,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:56:00,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:56:00,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:56:00,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572098281] [2024-06-20 15:56:00,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572098281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:56:00,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:56:00,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:56:00,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297996944] [2024-06-20 15:56:00,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:56:00,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:56:00,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:56:00,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:56:00,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:56:00,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:56:00,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 97 transitions, 834 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:56:00,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:56:00,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:56:00,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:56:01,117 INFO L124 PetriNetUnfolderBase]: 270/586 cut-off events. [2024-06-20 15:56:01,117 INFO L125 PetriNetUnfolderBase]: For 44514/44514 co-relation queries the response was YES. [2024-06-20 15:56:01,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3998 conditions, 586 events. 270/586 cut-off events. For 44514/44514 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3010 event pairs, 116 based on Foata normal form. 2/588 useless extension candidates. Maximal degree in co-relation 3927. Up to 528 conditions per place. [2024-06-20 15:56:01,121 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 89 selfloop transitions, 15 changer transitions 0/107 dead transitions. [2024-06-20 15:56:01,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 107 transitions, 1064 flow [2024-06-20 15:56:01,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:56:01,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:56:01,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 111 transitions. [2024-06-20 15:56:01,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37 [2024-06-20 15:56:01,122 INFO L175 Difference]: Start difference. First operand has 171 places, 97 transitions, 834 flow. Second operand 10 states and 111 transitions. [2024-06-20 15:56:01,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 107 transitions, 1064 flow [2024-06-20 15:56:01,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 107 transitions, 999 flow, removed 17 selfloop flow, removed 12 redundant places. [2024-06-20 15:56:01,187 INFO L231 Difference]: Finished difference. Result has 164 places, 97 transitions, 803 flow [2024-06-20 15:56:01,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=803, PETRI_PLACES=164, PETRI_TRANSITIONS=97} [2024-06-20 15:56:01,187 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 135 predicate places. [2024-06-20 15:56:01,187 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 97 transitions, 803 flow [2024-06-20 15:56:01,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:56:01,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:56:01,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:56:01,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-20 15:56:01,188 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:56:01,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:56:01,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1245276045, now seen corresponding path program 19 times [2024-06-20 15:56:01,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:56:01,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443593643] [2024-06-20 15:56:01,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:56:01,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:56:01,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:56:02,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:56:02,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:56:02,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443593643] [2024-06-20 15:56:02,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443593643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:56:02,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:56:02,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:56:02,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379522872] [2024-06-20 15:56:02,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:56:02,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:56:02,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:56:02,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:56:02,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:56:02,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:56:02,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 97 transitions, 803 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:56:02,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:56:02,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:56:02,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:56:02,932 INFO L124 PetriNetUnfolderBase]: 278/608 cut-off events. [2024-06-20 15:56:02,932 INFO L125 PetriNetUnfolderBase]: For 42372/42372 co-relation queries the response was YES. [2024-06-20 15:56:02,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3909 conditions, 608 events. 278/608 cut-off events. For 42372/42372 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3167 event pairs, 114 based on Foata normal form. 6/614 useless extension candidates. Maximal degree in co-relation 3841. Up to 461 conditions per place. [2024-06-20 15:56:02,936 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 89 selfloop transitions, 17 changer transitions 6/115 dead transitions. [2024-06-20 15:56:02,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 115 transitions, 1209 flow [2024-06-20 15:56:02,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:56:02,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:56:02,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 128 transitions. [2024-06-20 15:56:02,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3878787878787879 [2024-06-20 15:56:02,937 INFO L175 Difference]: Start difference. First operand has 164 places, 97 transitions, 803 flow. Second operand 11 states and 128 transitions. [2024-06-20 15:56:02,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 115 transitions, 1209 flow [2024-06-20 15:56:02,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 115 transitions, 1173 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-20 15:56:03,000 INFO L231 Difference]: Finished difference. Result has 166 places, 95 transitions, 791 flow [2024-06-20 15:56:03,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=767, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=791, PETRI_PLACES=166, PETRI_TRANSITIONS=95} [2024-06-20 15:56:03,000 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 137 predicate places. [2024-06-20 15:56:03,000 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 95 transitions, 791 flow [2024-06-20 15:56:03,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:56:03,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:56:03,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:56:03,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-20 15:56:03,001 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:56:03,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:56:03,001 INFO L85 PathProgramCache]: Analyzing trace with hash -583025437, now seen corresponding path program 20 times [2024-06-20 15:56:03,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:56:03,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940033913] [2024-06-20 15:56:03,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:56:03,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:56:03,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:56:04,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:56:04,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:56:04,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940033913] [2024-06-20 15:56:04,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940033913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:56:04,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:56:04,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:56:04,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471066921] [2024-06-20 15:56:04,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:56:04,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:56:04,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:56:04,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:56:04,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:56:04,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:56:04,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 95 transitions, 791 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:56:04,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:56:04,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:56:04,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:56:04,700 INFO L124 PetriNetUnfolderBase]: 262/576 cut-off events. [2024-06-20 15:56:04,700 INFO L125 PetriNetUnfolderBase]: For 44561/44561 co-relation queries the response was YES. [2024-06-20 15:56:04,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3434 conditions, 576 events. 262/576 cut-off events. For 44561/44561 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2985 event pairs, 85 based on Foata normal form. 14/590 useless extension candidates. Maximal degree in co-relation 3365. Up to 429 conditions per place. [2024-06-20 15:56:04,703 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 74 selfloop transitions, 17 changer transitions 12/106 dead transitions. [2024-06-20 15:56:04,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 106 transitions, 1049 flow [2024-06-20 15:56:04,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:56:04,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:56:04,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2024-06-20 15:56:04,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38666666666666666 [2024-06-20 15:56:04,704 INFO L175 Difference]: Start difference. First operand has 166 places, 95 transitions, 791 flow. Second operand 10 states and 116 transitions. [2024-06-20 15:56:04,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 106 transitions, 1049 flow [2024-06-20 15:56:04,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 106 transitions, 1015 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 15:56:04,770 INFO L231 Difference]: Finished difference. Result has 164 places, 89 transitions, 755 flow [2024-06-20 15:56:04,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=757, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=755, PETRI_PLACES=164, PETRI_TRANSITIONS=89} [2024-06-20 15:56:04,770 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 135 predicate places. [2024-06-20 15:56:04,770 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 89 transitions, 755 flow [2024-06-20 15:56:04,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:56:04,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:56:04,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:56:04,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-20 15:56:04,770 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:56:04,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:56:04,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1245284415, now seen corresponding path program 21 times [2024-06-20 15:56:04,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:56:04,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041177599] [2024-06-20 15:56:04,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:56:04,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:56:04,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:56:06,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:56:06,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:56:06,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041177599] [2024-06-20 15:56:06,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041177599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:56:06,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:56:06,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:56:06,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437128724] [2024-06-20 15:56:06,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:56:06,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:56:06,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:56:06,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:56:06,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:56:06,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:56:06,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 89 transitions, 755 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:56:06,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:56:06,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:56:06,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:56:06,652 INFO L124 PetriNetUnfolderBase]: 242/536 cut-off events. [2024-06-20 15:56:06,652 INFO L125 PetriNetUnfolderBase]: For 36652/36652 co-relation queries the response was YES. [2024-06-20 15:56:06,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3282 conditions, 536 events. 242/536 cut-off events. For 36652/36652 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2691 event pairs, 106 based on Foata normal form. 8/544 useless extension candidates. Maximal degree in co-relation 3214. Up to 445 conditions per place. [2024-06-20 15:56:06,655 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 76 selfloop transitions, 14 changer transitions 10/103 dead transitions. [2024-06-20 15:56:06,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 103 transitions, 1015 flow [2024-06-20 15:56:06,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:56:06,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:56:06,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 125 transitions. [2024-06-20 15:56:06,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787878787878788 [2024-06-20 15:56:06,656 INFO L175 Difference]: Start difference. First operand has 164 places, 89 transitions, 755 flow. Second operand 11 states and 125 transitions. [2024-06-20 15:56:06,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 103 transitions, 1015 flow [2024-06-20 15:56:06,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 103 transitions, 971 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-20 15:56:06,718 INFO L231 Difference]: Finished difference. Result has 158 places, 85 transitions, 713 flow [2024-06-20 15:56:06,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=711, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=713, PETRI_PLACES=158, PETRI_TRANSITIONS=85} [2024-06-20 15:56:06,719 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 129 predicate places. [2024-06-20 15:56:06,719 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 85 transitions, 713 flow [2024-06-20 15:56:06,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:56:06,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:56:06,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:56:06,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-20 15:56:06,720 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:56:06,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:56:06,720 INFO L85 PathProgramCache]: Analyzing trace with hash 95866659, now seen corresponding path program 32 times [2024-06-20 15:56:06,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:56:06,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012671350] [2024-06-20 15:56:06,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:56:06,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:56:06,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:56:07,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:56:07,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:56:07,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012671350] [2024-06-20 15:56:07,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012671350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:56:07,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:56:07,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:56:07,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509958481] [2024-06-20 15:56:07,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:56:07,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:56:07,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:56:07,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:56:07,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:56:07,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:56:07,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 85 transitions, 713 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:56:07,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:56:07,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:56:07,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:56:08,015 INFO L124 PetriNetUnfolderBase]: 229/511 cut-off events. [2024-06-20 15:56:08,016 INFO L125 PetriNetUnfolderBase]: For 29663/29663 co-relation queries the response was YES. [2024-06-20 15:56:08,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2944 conditions, 511 events. 229/511 cut-off events. For 29663/29663 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2525 event pairs, 70 based on Foata normal form. 8/519 useless extension candidates. Maximal degree in co-relation 2879. Up to 400 conditions per place. [2024-06-20 15:56:08,018 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 68 selfloop transitions, 12 changer transitions 14/97 dead transitions. [2024-06-20 15:56:08,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 97 transitions, 931 flow [2024-06-20 15:56:08,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:56:08,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:56:08,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-06-20 15:56:08,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37333333333333335 [2024-06-20 15:56:08,019 INFO L175 Difference]: Start difference. First operand has 158 places, 85 transitions, 713 flow. Second operand 10 states and 112 transitions. [2024-06-20 15:56:08,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 97 transitions, 931 flow [2024-06-20 15:56:08,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 97 transitions, 895 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-20 15:56:08,073 INFO L231 Difference]: Finished difference. Result has 154 places, 80 transitions, 650 flow [2024-06-20 15:56:08,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=677, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=650, PETRI_PLACES=154, PETRI_TRANSITIONS=80} [2024-06-20 15:56:08,074 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 125 predicate places. [2024-06-20 15:56:08,074 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 80 transitions, 650 flow [2024-06-20 15:56:08,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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) [2024-06-20 15:56:08,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:56:08,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:56:08,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-20 15:56:08,074 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:56:08,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:56:08,075 INFO L85 PathProgramCache]: Analyzing trace with hash -395620635, now seen corresponding path program 22 times [2024-06-20 15:56:08,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:56:08,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743818032] [2024-06-20 15:56:08,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:56:08,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:56:08,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:56:09,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:56:09,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:56:09,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743818032] [2024-06-20 15:56:09,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743818032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:56:09,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:56:09,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:56:09,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478184293] [2024-06-20 15:56:09,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:56:09,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:56:09,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:56:09,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:56:09,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:56:10,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:56:10,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 80 transitions, 650 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:56:10,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:56:10,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:56:10,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:56:10,473 INFO L124 PetriNetUnfolderBase]: 196/442 cut-off events. [2024-06-20 15:56:10,473 INFO L125 PetriNetUnfolderBase]: For 22448/22448 co-relation queries the response was YES. [2024-06-20 15:56:10,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2337 conditions, 442 events. 196/442 cut-off events. For 22448/22448 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2085 event pairs, 89 based on Foata normal form. 8/450 useless extension candidates. Maximal degree in co-relation 2272. Up to 361 conditions per place. [2024-06-20 15:56:10,476 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 69 selfloop transitions, 12 changer transitions 9/93 dead transitions. [2024-06-20 15:56:10,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 93 transitions, 864 flow [2024-06-20 15:56:10,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:56:10,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:56:10,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-06-20 15:56:10,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3696969696969697 [2024-06-20 15:56:10,477 INFO L175 Difference]: Start difference. First operand has 154 places, 80 transitions, 650 flow. Second operand 11 states and 122 transitions. [2024-06-20 15:56:10,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 93 transitions, 864 flow [2024-06-20 15:56:10,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 93 transitions, 754 flow, removed 12 selfloop flow, removed 12 redundant places. [2024-06-20 15:56:10,505 INFO L231 Difference]: Finished difference. Result has 146 places, 76 transitions, 535 flow [2024-06-20 15:56:10,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=535, PETRI_PLACES=146, PETRI_TRANSITIONS=76} [2024-06-20 15:56:10,506 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 117 predicate places. [2024-06-20 15:56:10,506 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 76 transitions, 535 flow [2024-06-20 15:56:10,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:56:10,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:56:10,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:56:10,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-20 15:56:10,506 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:56:10,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:56:10,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1197051183, now seen corresponding path program 1 times [2024-06-20 15:56:10,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:56:10,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837517595] [2024-06-20 15:56:10,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:56:10,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:56:10,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:56:12,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:56:12,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:56:12,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837517595] [2024-06-20 15:56:12,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837517595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:56:12,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:56:12,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:56:12,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439312888] [2024-06-20 15:56:12,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:56:12,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:56:12,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:56:12,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:56:12,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:56:12,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:56:12,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 76 transitions, 535 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:56:12,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:56:12,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:56:12,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:56:12,534 INFO L124 PetriNetUnfolderBase]: 187/427 cut-off events. [2024-06-20 15:56:12,534 INFO L125 PetriNetUnfolderBase]: For 17313/17313 co-relation queries the response was YES. [2024-06-20 15:56:12,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2043 conditions, 427 events. 187/427 cut-off events. For 17313/17313 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1990 event pairs, 51 based on Foata normal form. 6/433 useless extension candidates. Maximal degree in co-relation 1983. Up to 323 conditions per place. [2024-06-20 15:56:12,536 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 67 selfloop transitions, 13 changer transitions 10/93 dead transitions. [2024-06-20 15:56:12,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 93 transitions, 759 flow [2024-06-20 15:56:12,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:56:12,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:56:12,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 133 transitions. [2024-06-20 15:56:12,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36944444444444446 [2024-06-20 15:56:12,537 INFO L175 Difference]: Start difference. First operand has 146 places, 76 transitions, 535 flow. Second operand 12 states and 133 transitions. [2024-06-20 15:56:12,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 93 transitions, 759 flow [2024-06-20 15:56:12,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 93 transitions, 714 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-20 15:56:12,563 INFO L231 Difference]: Finished difference. Result has 142 places, 72 transitions, 487 flow [2024-06-20 15:56:12,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=487, PETRI_PLACES=142, PETRI_TRANSITIONS=72} [2024-06-20 15:56:12,563 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 113 predicate places. [2024-06-20 15:56:12,563 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 72 transitions, 487 flow [2024-06-20 15:56:12,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:56:12,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:56:12,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:56:12,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-20 15:56:12,563 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:56:12,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:56:12,564 INFO L85 PathProgramCache]: Analyzing trace with hash -2145722407, now seen corresponding path program 2 times [2024-06-20 15:56:12,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:56:12,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026111724] [2024-06-20 15:56:12,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:56:12,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:56:12,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:56:13,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:56:13,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:56:13,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026111724] [2024-06-20 15:56:13,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026111724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:56:13,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:56:13,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:56:13,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812943322] [2024-06-20 15:56:13,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:56:13,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:56:13,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:56:13,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:56:13,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:56:13,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:56:13,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 72 transitions, 487 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:56:13,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:56:13,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:56:13,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:56:14,154 INFO L124 PetriNetUnfolderBase]: 176/404 cut-off events. [2024-06-20 15:56:14,156 INFO L125 PetriNetUnfolderBase]: For 16343/16343 co-relation queries the response was YES. [2024-06-20 15:56:14,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1898 conditions, 404 events. 176/404 cut-off events. For 16343/16343 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1848 event pairs, 49 based on Foata normal form. 6/410 useless extension candidates. Maximal degree in co-relation 1840. Up to 312 conditions per place. [2024-06-20 15:56:14,158 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 62 selfloop transitions, 9 changer transitions 14/88 dead transitions. [2024-06-20 15:56:14,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 88 transitions, 697 flow [2024-06-20 15:56:14,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:56:14,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:56:14,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-06-20 15:56:14,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3696969696969697 [2024-06-20 15:56:14,159 INFO L175 Difference]: Start difference. First operand has 142 places, 72 transitions, 487 flow. Second operand 11 states and 122 transitions. [2024-06-20 15:56:14,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 88 transitions, 697 flow [2024-06-20 15:56:14,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 88 transitions, 661 flow, removed 5 selfloop flow, removed 13 redundant places. [2024-06-20 15:56:14,181 INFO L231 Difference]: Finished difference. Result has 135 places, 67 transitions, 433 flow [2024-06-20 15:56:14,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=433, PETRI_PLACES=135, PETRI_TRANSITIONS=67} [2024-06-20 15:56:14,182 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 106 predicate places. [2024-06-20 15:56:14,182 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 67 transitions, 433 flow [2024-06-20 15:56:14,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:56:14,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:56:14,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:56:14,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-20 15:56:14,182 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:56:14,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:56:14,182 INFO L85 PathProgramCache]: Analyzing trace with hash -945893513, now seen corresponding path program 3 times [2024-06-20 15:56:14,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:56:14,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916514618] [2024-06-20 15:56:14,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:56:14,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:56:14,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:56:15,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:56:15,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:56:15,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916514618] [2024-06-20 15:56:15,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916514618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:56:15,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:56:15,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:56:15,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563413850] [2024-06-20 15:56:15,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:56:15,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:56:15,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:56:15,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:56:15,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:56:15,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:56:15,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 67 transitions, 433 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:56:15,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:56:15,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:56:15,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:56:16,070 INFO L124 PetriNetUnfolderBase]: 146/340 cut-off events. [2024-06-20 15:56:16,070 INFO L125 PetriNetUnfolderBase]: For 12263/12263 co-relation queries the response was YES. [2024-06-20 15:56:16,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1465 conditions, 340 events. 146/340 cut-off events. For 12263/12263 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1468 event pairs, 36 based on Foata normal form. 6/346 useless extension candidates. Maximal degree in co-relation 1410. Up to 260 conditions per place. [2024-06-20 15:56:16,072 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 54 selfloop transitions, 5 changer transitions 21/83 dead transitions. [2024-06-20 15:56:16,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 83 transitions, 633 flow [2024-06-20 15:56:16,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:56:16,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:56:16,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 128 transitions. [2024-06-20 15:56:16,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35555555555555557 [2024-06-20 15:56:16,078 INFO L175 Difference]: Start difference. First operand has 135 places, 67 transitions, 433 flow. Second operand 12 states and 128 transitions. [2024-06-20 15:56:16,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 83 transitions, 633 flow [2024-06-20 15:56:16,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 83 transitions, 605 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-20 15:56:16,093 INFO L231 Difference]: Finished difference. Result has 129 places, 59 transitions, 351 flow [2024-06-20 15:56:16,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=351, PETRI_PLACES=129, PETRI_TRANSITIONS=59} [2024-06-20 15:56:16,096 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 100 predicate places. [2024-06-20 15:56:16,096 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 59 transitions, 351 flow [2024-06-20 15:56:16,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:56:16,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:56:16,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:56:16,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-20 15:56:16,097 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:56:16,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:56:16,097 INFO L85 PathProgramCache]: Analyzing trace with hash 14508221, now seen corresponding path program 4 times [2024-06-20 15:56:16,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:56:16,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452278329] [2024-06-20 15:56:16,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:56:16,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:56:16,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:56:17,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:56:17,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:56:17,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452278329] [2024-06-20 15:56:17,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452278329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:56:17,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:56:17,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:56:17,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095415917] [2024-06-20 15:56:17,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:56:17,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:56:17,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:56:17,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:56:17,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:56:17,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:56:17,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 59 transitions, 351 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:56:17,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:56:17,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:56:17,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:56:17,908 INFO L124 PetriNetUnfolderBase]: 135/309 cut-off events. [2024-06-20 15:56:17,909 INFO L125 PetriNetUnfolderBase]: For 12145/12145 co-relation queries the response was YES. [2024-06-20 15:56:17,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1327 conditions, 309 events. 135/309 cut-off events. For 12145/12145 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1296 event pairs, 32 based on Foata normal form. 6/315 useless extension candidates. Maximal degree in co-relation 1275. Up to 228 conditions per place. [2024-06-20 15:56:17,910 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 49 selfloop transitions, 6 changer transitions 16/74 dead transitions. [2024-06-20 15:56:17,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 74 transitions, 529 flow [2024-06-20 15:56:17,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:56:17,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:56:17,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 119 transitions. [2024-06-20 15:56:17,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3606060606060606 [2024-06-20 15:56:17,911 INFO L175 Difference]: Start difference. First operand has 129 places, 59 transitions, 351 flow. Second operand 11 states and 119 transitions. [2024-06-20 15:56:17,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 74 transitions, 529 flow [2024-06-20 15:56:17,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 74 transitions, 488 flow, removed 9 selfloop flow, removed 14 redundant places. [2024-06-20 15:56:17,923 INFO L231 Difference]: Finished difference. Result has 112 places, 54 transitions, 304 flow [2024-06-20 15:56:17,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=304, PETRI_PLACES=112, PETRI_TRANSITIONS=54} [2024-06-20 15:56:17,924 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 83 predicate places. [2024-06-20 15:56:17,924 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 54 transitions, 304 flow [2024-06-20 15:56:17,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:56:17,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:56:17,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:56:17,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-20 15:56:17,924 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:56:17,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:56:17,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1311796535, now seen corresponding path program 5 times [2024-06-20 15:56:17,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:56:17,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366582809] [2024-06-20 15:56:17,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:56:17,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:56:17,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:56:19,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:56:19,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:56:19,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366582809] [2024-06-20 15:56:19,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366582809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:56:19,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:56:19,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:56:19,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262092274] [2024-06-20 15:56:19,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:56:19,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:56:19,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:56:19,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:56:19,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:56:19,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:56:19,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 54 transitions, 304 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:56:19,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:56:19,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:56:19,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:56:19,992 INFO L124 PetriNetUnfolderBase]: 120/278 cut-off events. [2024-06-20 15:56:19,992 INFO L125 PetriNetUnfolderBase]: For 12091/12091 co-relation queries the response was YES. [2024-06-20 15:56:19,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1212 conditions, 278 events. 120/278 cut-off events. For 12091/12091 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1115 event pairs, 32 based on Foata normal form. 6/284 useless extension candidates. Maximal degree in co-relation 1167. Up to 203 conditions per place. [2024-06-20 15:56:19,993 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 44 selfloop transitions, 9 changer transitions 11/67 dead transitions. [2024-06-20 15:56:19,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 67 transitions, 464 flow [2024-06-20 15:56:19,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:56:19,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:56:19,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 119 transitions. [2024-06-20 15:56:19,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3606060606060606 [2024-06-20 15:56:19,994 INFO L175 Difference]: Start difference. First operand has 112 places, 54 transitions, 304 flow. Second operand 11 states and 119 transitions. [2024-06-20 15:56:19,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 67 transitions, 464 flow [2024-06-20 15:56:20,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 67 transitions, 438 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-20 15:56:20,003 INFO L231 Difference]: Finished difference. Result has 104 places, 50 transitions, 282 flow [2024-06-20 15:56:20,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=282, PETRI_PLACES=104, PETRI_TRANSITIONS=50} [2024-06-20 15:56:20,003 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 75 predicate places. [2024-06-20 15:56:20,003 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 50 transitions, 282 flow [2024-06-20 15:56:20,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:56:20,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:56:20,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:56:20,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-20 15:56:20,004 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:56:20,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:56:20,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1634550217, now seen corresponding path program 6 times [2024-06-20 15:56:20,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:56:20,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388157669] [2024-06-20 15:56:20,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:56:20,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:56:20,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:56:21,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:56:21,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:56:21,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388157669] [2024-06-20 15:56:21,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388157669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:56:21,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:56:21,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:56:21,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755383521] [2024-06-20 15:56:21,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:56:21,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:56:21,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:56:21,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:56:21,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:56:21,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:56:21,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 50 transitions, 282 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:56:21,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:56:21,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:56:21,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:56:22,161 INFO L124 PetriNetUnfolderBase]: 112/260 cut-off events. [2024-06-20 15:56:22,161 INFO L125 PetriNetUnfolderBase]: For 9789/9789 co-relation queries the response was YES. [2024-06-20 15:56:22,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1102 conditions, 260 events. 112/260 cut-off events. For 9789/9789 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1012 event pairs, 32 based on Foata normal form. 6/266 useless extension candidates. Maximal degree in co-relation 1061. Up to 193 conditions per place. [2024-06-20 15:56:22,162 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 42 selfloop transitions, 8 changer transitions 10/63 dead transitions. [2024-06-20 15:56:22,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 63 transitions, 432 flow [2024-06-20 15:56:22,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:56:22,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:56:22,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 117 transitions. [2024-06-20 15:56:22,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35454545454545455 [2024-06-20 15:56:22,163 INFO L175 Difference]: Start difference. First operand has 104 places, 50 transitions, 282 flow. Second operand 11 states and 117 transitions. [2024-06-20 15:56:22,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 63 transitions, 432 flow [2024-06-20 15:56:22,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 63 transitions, 406 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-20 15:56:22,171 INFO L231 Difference]: Finished difference. Result has 98 places, 47 transitions, 261 flow [2024-06-20 15:56:22,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=261, PETRI_PLACES=98, PETRI_TRANSITIONS=47} [2024-06-20 15:56:22,172 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 69 predicate places. [2024-06-20 15:56:22,172 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 47 transitions, 261 flow [2024-06-20 15:56:22,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:56:22,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:56:22,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:56:22,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-20 15:56:22,172 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:56:22,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:56:22,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1634694367, now seen corresponding path program 7 times [2024-06-20 15:56:22,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:56:22,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777983216] [2024-06-20 15:56:22,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:56:22,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:56:22,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:56:23,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:56:23,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:56:23,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777983216] [2024-06-20 15:56:23,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777983216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:56:23,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:56:23,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:56:23,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491519029] [2024-06-20 15:56:23,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:56:23,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:56:23,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:56:23,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:56:23,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:56:23,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:56:23,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 47 transitions, 261 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:56:23,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:56:23,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:56:23,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:56:24,224 INFO L124 PetriNetUnfolderBase]: 105/247 cut-off events. [2024-06-20 15:56:24,224 INFO L125 PetriNetUnfolderBase]: For 8093/8093 co-relation queries the response was YES. [2024-06-20 15:56:24,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1025 conditions, 247 events. 105/247 cut-off events. For 8093/8093 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 932 event pairs, 30 based on Foata normal form. 6/253 useless extension candidates. Maximal degree in co-relation 987. Up to 175 conditions per place. [2024-06-20 15:56:24,225 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 35 selfloop transitions, 3 changer transitions 20/61 dead transitions. [2024-06-20 15:56:24,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 61 transitions, 409 flow [2024-06-20 15:56:24,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:56:24,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:56:24,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 117 transitions. [2024-06-20 15:56:24,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35454545454545455 [2024-06-20 15:56:24,226 INFO L175 Difference]: Start difference. First operand has 98 places, 47 transitions, 261 flow. Second operand 11 states and 117 transitions. [2024-06-20 15:56:24,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 61 transitions, 409 flow [2024-06-20 15:56:24,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 61 transitions, 387 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-20 15:56:24,231 INFO L231 Difference]: Finished difference. Result has 94 places, 40 transitions, 215 flow [2024-06-20 15:56:24,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=215, PETRI_PLACES=94, PETRI_TRANSITIONS=40} [2024-06-20 15:56:24,231 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 65 predicate places. [2024-06-20 15:56:24,231 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 40 transitions, 215 flow [2024-06-20 15:56:24,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:56:24,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:56:24,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:56:24,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-20 15:56:24,232 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:56:24,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:56:24,232 INFO L85 PathProgramCache]: Analyzing trace with hash 852355005, now seen corresponding path program 8 times [2024-06-20 15:56:24,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:56:24,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091465721] [2024-06-20 15:56:24,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:56:24,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:56:24,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:56:25,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:56:25,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:56:25,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091465721] [2024-06-20 15:56:25,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091465721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:56:25,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:56:25,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:56:25,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204965753] [2024-06-20 15:56:25,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:56:25,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:56:25,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:56:25,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:56:25,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:56:25,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:56:25,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 40 transitions, 215 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:56:25,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:56:25,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:56:25,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:56:25,929 INFO L124 PetriNetUnfolderBase]: 90/213 cut-off events. [2024-06-20 15:56:25,930 INFO L125 PetriNetUnfolderBase]: For 7024/7024 co-relation queries the response was YES. [2024-06-20 15:56:25,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 897 conditions, 213 events. 90/213 cut-off events. For 7024/7024 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 770 event pairs, 30 based on Foata normal form. 6/219 useless extension candidates. Maximal degree in co-relation 861. Up to 147 conditions per place. [2024-06-20 15:56:25,931 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 30 selfloop transitions, 7 changer transitions 12/52 dead transitions. [2024-06-20 15:56:25,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 52 transitions, 339 flow [2024-06-20 15:56:25,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:56:25,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:56:25,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 116 transitions. [2024-06-20 15:56:25,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3515151515151515 [2024-06-20 15:56:25,931 INFO L175 Difference]: Start difference. First operand has 94 places, 40 transitions, 215 flow. Second operand 11 states and 116 transitions. [2024-06-20 15:56:25,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 52 transitions, 339 flow [2024-06-20 15:56:25,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 52 transitions, 317 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-20 15:56:25,935 INFO L231 Difference]: Finished difference. Result has 81 places, 36 transitions, 191 flow [2024-06-20 15:56:25,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=191, PETRI_PLACES=81, PETRI_TRANSITIONS=36} [2024-06-20 15:56:25,935 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 52 predicate places. [2024-06-20 15:56:25,935 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 36 transitions, 191 flow [2024-06-20 15:56:25,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:56:25,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:56:25,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:56:25,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-20 15:56:25,936 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:56:25,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:56:25,936 INFO L85 PathProgramCache]: Analyzing trace with hash -899640139, now seen corresponding path program 9 times [2024-06-20 15:56:25,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:56:25,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107909871] [2024-06-20 15:56:25,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:56:25,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:56:25,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:56:27,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:56:27,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:56:27,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107909871] [2024-06-20 15:56:27,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107909871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:56:27,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:56:27,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:56:27,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782586237] [2024-06-20 15:56:27,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:56:27,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:56:27,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:56:27,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:56:27,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:56:28,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:56:28,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 36 transitions, 191 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:56:28,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:56:28,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:56:28,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:56:28,326 INFO L124 PetriNetUnfolderBase]: 82/195 cut-off events. [2024-06-20 15:56:28,326 INFO L125 PetriNetUnfolderBase]: For 4336/4336 co-relation queries the response was YES. [2024-06-20 15:56:28,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 778 conditions, 195 events. 82/195 cut-off events. For 4336/4336 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 669 event pairs, 28 based on Foata normal form. 6/201 useless extension candidates. Maximal degree in co-relation 748. Up to 129 conditions per place. [2024-06-20 15:56:28,327 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 25 selfloop transitions, 4 changer transitions 17/49 dead transitions. [2024-06-20 15:56:28,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 49 transitions, 311 flow [2024-06-20 15:56:28,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:56:28,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:56:28,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 115 transitions. [2024-06-20 15:56:28,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3484848484848485 [2024-06-20 15:56:28,327 INFO L175 Difference]: Start difference. First operand has 81 places, 36 transitions, 191 flow. Second operand 11 states and 115 transitions. [2024-06-20 15:56:28,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 49 transitions, 311 flow [2024-06-20 15:56:28,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 49 transitions, 289 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-20 15:56:28,331 INFO L231 Difference]: Finished difference. Result has 75 places, 30 transitions, 152 flow [2024-06-20 15:56:28,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=152, PETRI_PLACES=75, PETRI_TRANSITIONS=30} [2024-06-20 15:56:28,331 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 46 predicate places. [2024-06-20 15:56:28,331 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 30 transitions, 152 flow [2024-06-20 15:56:28,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:56:28,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:56:28,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:56:28,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-20 15:56:28,331 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:56:28,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:56:28,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1839775465, now seen corresponding path program 10 times [2024-06-20 15:56:28,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:56:28,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058886795] [2024-06-20 15:56:28,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:56:28,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:56:28,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:56:29,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:56:29,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:56:29,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058886795] [2024-06-20 15:56:29,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058886795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:56:29,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:56:29,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:56:29,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797760031] [2024-06-20 15:56:29,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:56:29,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:56:29,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:56:29,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:56:29,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:56:29,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:56:29,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 30 transitions, 152 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:56:29,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:56:29,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:56:29,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:56:30,027 INFO L124 PetriNetUnfolderBase]: 69/166 cut-off events. [2024-06-20 15:56:30,028 INFO L125 PetriNetUnfolderBase]: For 3222/3222 co-relation queries the response was YES. [2024-06-20 15:56:30,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 657 conditions, 166 events. 69/166 cut-off events. For 3222/3222 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 532 event pairs, 8 based on Foata normal form. 6/172 useless extension candidates. Maximal degree in co-relation 630. Up to 75 conditions per place. [2024-06-20 15:56:30,028 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 18 selfloop transitions, 12 changer transitions 10/43 dead transitions. [2024-06-20 15:56:30,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 43 transitions, 260 flow [2024-06-20 15:56:30,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:56:30,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:56:30,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 112 transitions. [2024-06-20 15:56:30,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3393939393939394 [2024-06-20 15:56:30,029 INFO L175 Difference]: Start difference. First operand has 75 places, 30 transitions, 152 flow. Second operand 11 states and 112 transitions. [2024-06-20 15:56:30,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 43 transitions, 260 flow [2024-06-20 15:56:30,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 43 transitions, 240 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-20 15:56:30,031 INFO L231 Difference]: Finished difference. Result has 65 places, 26 transitions, 140 flow [2024-06-20 15:56:30,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=140, PETRI_PLACES=65, PETRI_TRANSITIONS=26} [2024-06-20 15:56:30,031 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 36 predicate places. [2024-06-20 15:56:30,031 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 26 transitions, 140 flow [2024-06-20 15:56:30,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:56:30,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:56:30,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:56:30,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-20 15:56:30,031 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:56:30,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:56:30,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1063406281, now seen corresponding path program 11 times [2024-06-20 15:56:30,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:56:30,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312390589] [2024-06-20 15:56:30,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:56:30,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:56:30,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:56:31,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:56:31,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:56:31,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312390589] [2024-06-20 15:56:31,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312390589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:56:31,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:56:31,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:56:31,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142976322] [2024-06-20 15:56:31,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:56:31,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:56:31,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:56:31,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:56:31,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:56:31,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:56:31,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 26 transitions, 140 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:56:31,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:56:31,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:56:31,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:56:32,008 INFO L124 PetriNetUnfolderBase]: 43/110 cut-off events. [2024-06-20 15:56:32,008 INFO L125 PetriNetUnfolderBase]: For 1208/1208 co-relation queries the response was YES. [2024-06-20 15:56:32,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 396 conditions, 110 events. 43/110 cut-off events. For 1208/1208 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 276 event pairs, 13 based on Foata normal form. 6/116 useless extension candidates. Maximal degree in co-relation 374. Up to 44 conditions per place. [2024-06-20 15:56:32,009 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 16 selfloop transitions, 6 changer transitions 13/38 dead transitions. [2024-06-20 15:56:32,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 38 transitions, 236 flow [2024-06-20 15:56:32,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:56:32,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:56:32,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 112 transitions. [2024-06-20 15:56:32,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3393939393939394 [2024-06-20 15:56:32,010 INFO L175 Difference]: Start difference. First operand has 65 places, 26 transitions, 140 flow. Second operand 11 states and 112 transitions. [2024-06-20 15:56:32,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 38 transitions, 236 flow [2024-06-20 15:56:32,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 38 transitions, 204 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-20 15:56:32,011 INFO L231 Difference]: Finished difference. Result has 59 places, 21 transitions, 98 flow [2024-06-20 15:56:32,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=98, PETRI_PLACES=59, PETRI_TRANSITIONS=21} [2024-06-20 15:56:32,011 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 30 predicate places. [2024-06-20 15:56:32,011 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 21 transitions, 98 flow [2024-06-20 15:56:32,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:56:32,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:56:32,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:56:32,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-20 15:56:32,012 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:56:32,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:56:32,012 INFO L85 PathProgramCache]: Analyzing trace with hash -24298485, now seen corresponding path program 12 times [2024-06-20 15:56:32,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:56:32,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849726897] [2024-06-20 15:56:32,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:56:32,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:56:32,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:56:33,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:56:33,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:56:33,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849726897] [2024-06-20 15:56:33,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849726897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:56:33,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:56:33,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:56:33,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612880416] [2024-06-20 15:56:33,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:56:33,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:56:33,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:56:33,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:56:33,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:56:33,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-20 15:56:33,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 21 transitions, 98 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:56:33,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:56:33,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-20 15:56:33,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:56:33,859 INFO L124 PetriNetUnfolderBase]: 19/56 cut-off events. [2024-06-20 15:56:33,859 INFO L125 PetriNetUnfolderBase]: For 376/376 co-relation queries the response was YES. [2024-06-20 15:56:33,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 56 events. 19/56 cut-off events. For 376/376 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 6/62 useless extension candidates. Maximal degree in co-relation 144. Up to 24 conditions per place. [2024-06-20 15:56:33,859 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 0 selfloop transitions, 0 changer transitions 28/28 dead transitions. [2024-06-20 15:56:33,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 28 transitions, 140 flow [2024-06-20 15:56:33,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:56:33,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:56:33,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 103 transitions. [2024-06-20 15:56:33,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31212121212121213 [2024-06-20 15:56:33,860 INFO L175 Difference]: Start difference. First operand has 59 places, 21 transitions, 98 flow. Second operand 11 states and 103 transitions. [2024-06-20 15:56:33,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 28 transitions, 140 flow [2024-06-20 15:56:33,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 28 transitions, 112 flow, removed 1 selfloop flow, removed 13 redundant places. [2024-06-20 15:56:33,860 INFO L231 Difference]: Finished difference. Result has 46 places, 0 transitions, 0 flow [2024-06-20 15:56:33,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=0, PETRI_PLACES=46, PETRI_TRANSITIONS=0} [2024-06-20 15:56:33,861 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 17 predicate places. [2024-06-20 15:56:33,861 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 0 transitions, 0 flow [2024-06-20 15:56:33,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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) [2024-06-20 15:56:33,863 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-20 15:56:33,870 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-20 15:56:33,873 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-20 15:56:33,873 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-20 15:56:33,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-20 15:56:33,874 INFO L445 BasicCegarLoop]: Path program histogram: [32, 22, 20, 12, 12, 10, 9, 7, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:56:33,876 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-20 15:56:33,876 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-20 15:56:33,880 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-20 15:56:33,880 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-20 15:56:33,881 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.06 03:56:33 BasicIcfg [2024-06-20 15:56:33,881 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-20 15:56:33,882 INFO L158 Benchmark]: Toolchain (without parser) took 232450.37ms. Allocated memory was 144.7MB in the beginning and 1.1GB in the end (delta: 979.4MB). Free memory was 84.0MB in the beginning and 817.8MB in the end (delta: -733.7MB). Peak memory consumption was 245.2MB. Max. memory is 16.1GB. [2024-06-20 15:56:33,884 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 88.1MB. Free memory was 50.6MB in the beginning and 50.6MB in the end (delta: 44.1kB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-20 15:56:33,884 INFO L158 Benchmark]: Witness Parser took 0.15ms. Allocated memory is still 144.7MB. Free memory is still 89.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-20 15:56:33,884 INFO L158 Benchmark]: CACSL2BoogieTranslator took 546.25ms. Allocated memory is still 144.7MB. Free memory was 83.6MB in the beginning and 96.3MB in the end (delta: -12.7MB). Peak memory consumption was 19.1MB. Max. memory is 16.1GB. [2024-06-20 15:56:33,884 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.89ms. Allocated memory is still 144.7MB. Free memory was 96.3MB in the beginning and 93.0MB in the end (delta: 3.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-20 15:56:33,884 INFO L158 Benchmark]: Boogie Preprocessor took 105.53ms. Allocated memory is still 144.7MB. Free memory was 93.0MB in the beginning and 112.4MB in the end (delta: -19.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2024-06-20 15:56:33,885 INFO L158 Benchmark]: RCFGBuilder took 651.41ms. Allocated memory is still 144.7MB. Free memory was 112.4MB in the beginning and 56.2MB in the end (delta: 56.2MB). Peak memory consumption was 54.5MB. Max. memory is 16.1GB. [2024-06-20 15:56:33,885 INFO L158 Benchmark]: TraceAbstraction took 231104.82ms. Allocated memory was 144.7MB in the beginning and 1.1GB in the end (delta: 979.4MB). Free memory was 55.8MB in the beginning and 817.8MB in the end (delta: -762.0MB). Peak memory consumption was 219.5MB. Max. memory is 16.1GB. [2024-06-20 15:56:33,886 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 88.1MB. Free memory was 50.6MB in the beginning and 50.6MB in the end (delta: 44.1kB). There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.15ms. Allocated memory is still 144.7MB. Free memory is still 89.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 546.25ms. Allocated memory is still 144.7MB. Free memory was 83.6MB in the beginning and 96.3MB in the end (delta: -12.7MB). Peak memory consumption was 19.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.89ms. Allocated memory is still 144.7MB. Free memory was 96.3MB in the beginning and 93.0MB in the end (delta: 3.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 105.53ms. Allocated memory is still 144.7MB. Free memory was 93.0MB in the beginning and 112.4MB in the end (delta: -19.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 651.41ms. Allocated memory is still 144.7MB. Free memory was 112.4MB in the beginning and 56.2MB in the end (delta: 56.2MB). Peak memory consumption was 54.5MB. Max. memory is 16.1GB. * TraceAbstraction took 231104.82ms. Allocated memory was 144.7MB in the beginning and 1.1GB in the end (delta: 979.4MB). Free memory was 55.8MB in the beginning and 817.8MB in the end (delta: -762.0MB). Peak memory consumption was 219.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 824]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 825]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 48 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 231.0s, OverallIterations: 153, TraceHistogramMax: 1, PathProgramHistogramMax: 32, EmptinessCheckTime: 0.0s, AutomataDifference: 65.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9008 SdHoareTripleChecker+Valid, 35.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7557 mSDsluCounter, 4498 SdHoareTripleChecker+Invalid, 30.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4015 mSDsCounter, 1406 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 59027 IncrementalHoareTripleChecker+Invalid, 60433 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1406 mSolverCounterUnsat, 483 mSDtfsCounter, 59027 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1619 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2792 ImplicationChecksByTransitivity, 46.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2086occurred in iteration=81, InterpolantAutomatonStates: 1474, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 163.1s InterpolantComputationTime, 2409 NumberOfCodeBlocks, 2409 NumberOfCodeBlocksAsserted, 153 NumberOfCheckSat, 2256 ConstructedInterpolants, 0 QuantifiedInterpolants, 115132 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 153 InterpolantComputations, 153 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-20 15:56:33,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE