./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/rfi003_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/rfi003_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/rfi003_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/protection/rfi003_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 20:41:09,802 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:41:09,869 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:41:09,874 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:41:09,874 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:41:09,892 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:41:09,892 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:41:09,893 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:41:09,893 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:41:09,896 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:41:09,897 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:41:09,897 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:41:09,897 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:41:09,898 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:41:09,898 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:41:09,899 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:41:09,899 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:41:09,899 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:41:09,900 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:41:09,900 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:41:09,900 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:41:09,900 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:41:09,901 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:41:09,901 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:41:09,901 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:41:09,901 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:41:09,901 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:41:09,902 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:41:09,902 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:41:09,902 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:41:09,903 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:41:09,903 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:41:09,903 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:41:09,903 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:41:09,904 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:41:09,904 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:41:09,904 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:41:09,904 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:41:09,904 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:41:09,904 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:41:09,905 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:41:09,905 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:41:09,905 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:41:09,905 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:41:10,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:41:10,103 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:41:10,105 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:41:10,106 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:41:10,106 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:41:10,107 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi003_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-27 20:41:11,132 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:41:11,345 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:41:11,345 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi003_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-27 20:41:11,361 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef757c16b/4714383ddf0d4437a33674b5c7ae0d62/FLAGc62c8dfcb [2024-06-27 20:41:11,710 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef757c16b/4714383ddf0d4437a33674b5c7ae0d62 [2024-06-27 20:41:11,712 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:41:11,713 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:41:11,713 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/rfi003_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-27 20:41:11,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:41:11,908 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:41:11,910 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:41:11,910 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:41:11,913 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:41:11,914 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:41:11" (1/2) ... [2024-06-27 20:41:11,915 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e66ce01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:41:11, skipping insertion in model container [2024-06-27 20:41:11,915 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:41:11" (1/2) ... [2024-06-27 20:41:11,917 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4093d6cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:41:11, skipping insertion in model container [2024-06-27 20:41:11,917 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:41:11" (2/2) ... [2024-06-27 20:41:11,917 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e66ce01 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:41:11, skipping insertion in model container [2024-06-27 20:41:11,918 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:41:11" (2/2) ... [2024-06-27 20:41:11,918 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:41:11,971 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:41:11,973 INFO L97 edCorrectnessWitness]: Location invariant before [L817-L817] (((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1) || __unbuffered_p1_EBX == 2))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) [2024-06-27 20:41:11,973 INFO L97 edCorrectnessWitness]: Location invariant before [L816-L816] (((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1) || __unbuffered_p1_EBX == 2))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) [2024-06-27 20:41:11,973 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:41:11,973 INFO L106 edCorrectnessWitness]: ghost_update [L814-L814] multithreaded = 1; [2024-06-27 20:41:12,011 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:41:12,323 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:41:12,338 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:41:12,454 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:41:12,496 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:41:12,496 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:41:12 WrapperNode [2024-06-27 20:41:12,497 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:41:12,497 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:41:12,498 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:41:12,498 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:41:12,503 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:41:12" (1/1) ... [2024-06-27 20:41:12,531 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:41:12" (1/1) ... [2024-06-27 20:41:12,564 INFO L138 Inliner]: procedures = 174, calls = 40, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 120 [2024-06-27 20:41:12,567 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:41:12,568 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:41:12,569 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:41:12,569 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:41:12,577 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:41:12" (1/1) ... [2024-06-27 20:41:12,578 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:41:12" (1/1) ... [2024-06-27 20:41:12,587 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:41:12" (1/1) ... [2024-06-27 20:41:12,603 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 20:41:12,606 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:41:12" (1/1) ... [2024-06-27 20:41:12,606 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:41:12" (1/1) ... [2024-06-27 20:41:12,619 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:41:12" (1/1) ... [2024-06-27 20:41:12,625 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:41:12" (1/1) ... [2024-06-27 20:41:12,628 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:41:12" (1/1) ... [2024-06-27 20:41:12,636 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:41:12" (1/1) ... [2024-06-27 20:41:12,638 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:41:12,639 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:41:12,639 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:41:12,639 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:41:12,640 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:41:12" (1/1) ... [2024-06-27 20:41:12,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:41:12,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:41:12,677 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 20:41:12,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 20:41:12,709 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:41:12,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:41:12,709 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:41:12,709 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:41:12,709 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:41:12,709 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:41:12,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:41:12,710 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:41:12,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:41:12,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:41:12,711 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 20:41:12,832 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:41:12,834 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:41:13,076 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:41:13,077 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:41:13,237 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:41:13,237 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:41:13,238 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:41:13 BoogieIcfgContainer [2024-06-27 20:41:13,238 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:41:13,240 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:41:13,240 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:41:13,242 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:41:13,242 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:41:11" (1/4) ... [2024-06-27 20:41:13,243 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@113459ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:41:13, skipping insertion in model container [2024-06-27 20:41:13,243 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:41:11" (2/4) ... [2024-06-27 20:41:13,243 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@113459ce and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:41:13, skipping insertion in model container [2024-06-27 20:41:13,243 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:41:12" (3/4) ... [2024-06-27 20:41:13,244 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@113459ce and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:41:13, skipping insertion in model container [2024-06-27 20:41:13,244 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:41:13" (4/4) ... [2024-06-27 20:41:13,245 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi003_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-27 20:41:13,258 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:41:13,258 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-27 20:41:13,258 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:41:13,288 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:41:13,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 32 transitions, 72 flow [2024-06-27 20:41:13,334 INFO L124 PetriNetUnfolderBase]: 0/30 cut-off events. [2024-06-27 20:41:13,335 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:41:13,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 30 events. 0/30 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 44 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 20:41:13,336 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 32 transitions, 72 flow [2024-06-27 20:41:13,339 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 24 transitions, 54 flow [2024-06-27 20:41:13,352 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:41:13,359 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;@26828436, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:41:13,359 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-27 20:41:13,362 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:41:13,362 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 20:41:13,363 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:41:13,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:13,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:41:13,364 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)] === [2024-06-27 20:41:13,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:13,374 INFO L85 PathProgramCache]: Analyzing trace with hash 325199742, now seen corresponding path program 1 times [2024-06-27 20:41:13,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:13,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484607171] [2024-06-27 20:41:13,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:13,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:13,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:14,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:14,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:14,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484607171] [2024-06-27 20:41:14,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484607171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:14,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:14,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:41:14,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131274528] [2024-06-27 20:41:14,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:14,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:41:14,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:14,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:41:14,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:41:14,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 32 [2024-06-27 20:41:14,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:14,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:14,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 32 [2024-06-27 20:41:14,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:14,443 INFO L124 PetriNetUnfolderBase]: 131/269 cut-off events. [2024-06-27 20:41:14,443 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-06-27 20:41:14,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 525 conditions, 269 events. 131/269 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1071 event pairs, 75 based on Foata normal form. 1/257 useless extension candidates. Maximal degree in co-relation 514. Up to 235 conditions per place. [2024-06-27 20:41:14,448 INFO L140 encePairwiseOnDemand]: 27/32 looper letters, 20 selfloop transitions, 3 changer transitions 0/30 dead transitions. [2024-06-27 20:41:14,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 30 transitions, 115 flow [2024-06-27 20:41:14,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:41:14,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:41:14,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-06-27 20:41:14,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6354166666666666 [2024-06-27 20:41:14,458 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 54 flow. Second operand 3 states and 61 transitions. [2024-06-27 20:41:14,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 30 transitions, 115 flow [2024-06-27 20:41:14,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 30 transitions, 112 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 20:41:14,461 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 73 flow [2024-06-27 20:41:14,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2024-06-27 20:41:14,466 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 1 predicate places. [2024-06-27 20:41:14,466 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 73 flow [2024-06-27 20:41:14,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:14,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:14,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:14,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:41:14,467 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)] === [2024-06-27 20:41:14,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:14,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1015624547, now seen corresponding path program 1 times [2024-06-27 20:41:14,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:14,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039838424] [2024-06-27 20:41:14,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:14,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:14,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:14,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:14,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:14,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039838424] [2024-06-27 20:41:14,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039838424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:14,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:14,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:41:14,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200757075] [2024-06-27 20:41:14,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:14,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:41:14,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:14,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:41:14,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:41:14,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 32 [2024-06-27 20:41:14,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 73 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:14,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:14,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 32 [2024-06-27 20:41:14,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:15,087 INFO L124 PetriNetUnfolderBase]: 169/317 cut-off events. [2024-06-27 20:41:15,087 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2024-06-27 20:41:15,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 317 events. 169/317 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1198 event pairs, 70 based on Foata normal form. 4/320 useless extension candidates. Maximal degree in co-relation 710. Up to 281 conditions per place. [2024-06-27 20:41:15,092 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 27 selfloop transitions, 5 changer transitions 0/37 dead transitions. [2024-06-27 20:41:15,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 37 transitions, 165 flow [2024-06-27 20:41:15,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:41:15,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:41:15,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 74 transitions. [2024-06-27 20:41:15,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-27 20:41:15,095 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 73 flow. Second operand 4 states and 74 transitions. [2024-06-27 20:41:15,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 37 transitions, 165 flow [2024-06-27 20:41:15,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 37 transitions, 162 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:41:15,099 INFO L231 Difference]: Finished difference. Result has 35 places, 28 transitions, 97 flow [2024-06-27 20:41:15,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=97, PETRI_PLACES=35, PETRI_TRANSITIONS=28} [2024-06-27 20:41:15,099 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 4 predicate places. [2024-06-27 20:41:15,100 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 28 transitions, 97 flow [2024-06-27 20:41:15,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:15,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:15,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:15,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:41:15,100 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:41:15,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:15,103 INFO L85 PathProgramCache]: Analyzing trace with hash 843623674, now seen corresponding path program 1 times [2024-06-27 20:41:15,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:15,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992983884] [2024-06-27 20:41:15,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:15,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:15,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:15,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:15,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:15,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992983884] [2024-06-27 20:41:15,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992983884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:15,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:15,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:41:15,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731163536] [2024-06-27 20:41:15,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:15,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:41:15,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:15,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:41:15,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:41:15,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 32 [2024-06-27 20:41:15,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 28 transitions, 97 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:15,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:15,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 32 [2024-06-27 20:41:15,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:15,809 INFO L124 PetriNetUnfolderBase]: 123/252 cut-off events. [2024-06-27 20:41:15,809 INFO L125 PetriNetUnfolderBase]: For 144/144 co-relation queries the response was YES. [2024-06-27 20:41:15,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 632 conditions, 252 events. 123/252 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 977 event pairs, 62 based on Foata normal form. 1/247 useless extension candidates. Maximal degree in co-relation 617. Up to 219 conditions per place. [2024-06-27 20:41:15,811 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 23 selfloop transitions, 6 changer transitions 0/35 dead transitions. [2024-06-27 20:41:15,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 35 transitions, 173 flow [2024-06-27 20:41:15,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:41:15,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:41:15,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2024-06-27 20:41:15,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2024-06-27 20:41:15,812 INFO L175 Difference]: Start difference. First operand has 35 places, 28 transitions, 97 flow. Second operand 5 states and 78 transitions. [2024-06-27 20:41:15,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 35 transitions, 173 flow [2024-06-27 20:41:15,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 35 transitions, 164 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 20:41:15,814 INFO L231 Difference]: Finished difference. Result has 38 places, 30 transitions, 115 flow [2024-06-27 20:41:15,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=115, PETRI_PLACES=38, PETRI_TRANSITIONS=30} [2024-06-27 20:41:15,815 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 7 predicate places. [2024-06-27 20:41:15,815 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 30 transitions, 115 flow [2024-06-27 20:41:15,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:15,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:15,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:15,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:41:15,816 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:41:15,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:15,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1577241307, now seen corresponding path program 1 times [2024-06-27 20:41:15,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:15,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185835635] [2024-06-27 20:41:15,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:15,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:15,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:16,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:16,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:16,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185835635] [2024-06-27 20:41:16,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185835635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:16,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:16,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:41:16,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956388297] [2024-06-27 20:41:16,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:16,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:41:16,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:16,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:41:16,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:41:16,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 32 [2024-06-27 20:41:16,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 30 transitions, 115 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 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) [2024-06-27 20:41:16,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:16,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 32 [2024-06-27 20:41:16,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:16,647 INFO L124 PetriNetUnfolderBase]: 163/306 cut-off events. [2024-06-27 20:41:16,647 INFO L125 PetriNetUnfolderBase]: For 303/303 co-relation queries the response was YES. [2024-06-27 20:41:16,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 837 conditions, 306 events. 163/306 cut-off events. For 303/303 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1181 event pairs, 29 based on Foata normal form. 4/309 useless extension candidates. Maximal degree in co-relation 821. Up to 252 conditions per place. [2024-06-27 20:41:16,666 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 32 selfloop transitions, 8 changer transitions 0/45 dead transitions. [2024-06-27 20:41:16,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 45 transitions, 229 flow [2024-06-27 20:41:16,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:41:16,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:41:16,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-27 20:41:16,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-27 20:41:16,668 INFO L175 Difference]: Start difference. First operand has 38 places, 30 transitions, 115 flow. Second operand 6 states and 100 transitions. [2024-06-27 20:41:16,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 45 transitions, 229 flow [2024-06-27 20:41:16,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 45 transitions, 218 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-27 20:41:16,670 INFO L231 Difference]: Finished difference. Result has 41 places, 31 transitions, 129 flow [2024-06-27 20:41:16,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=129, PETRI_PLACES=41, PETRI_TRANSITIONS=31} [2024-06-27 20:41:16,671 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2024-06-27 20:41:16,671 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 31 transitions, 129 flow [2024-06-27 20:41:16,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 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) [2024-06-27 20:41:16,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:16,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:16,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:41:16,672 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)] === [2024-06-27 20:41:16,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:16,673 INFO L85 PathProgramCache]: Analyzing trace with hash 382530951, now seen corresponding path program 1 times [2024-06-27 20:41:16,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:16,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313642734] [2024-06-27 20:41:16,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:16,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:16,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:17,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:17,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:17,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313642734] [2024-06-27 20:41:17,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313642734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:17,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:17,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:41:17,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489083362] [2024-06-27 20:41:17,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:17,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:41:17,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:17,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:41:17,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:41:17,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:17,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 129 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) [2024-06-27 20:41:17,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:17,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:17,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:17,370 INFO L124 PetriNetUnfolderBase]: 179/336 cut-off events. [2024-06-27 20:41:17,370 INFO L125 PetriNetUnfolderBase]: For 532/532 co-relation queries the response was YES. [2024-06-27 20:41:17,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 993 conditions, 336 events. 179/336 cut-off events. For 532/532 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1350 event pairs, 49 based on Foata normal form. 3/337 useless extension candidates. Maximal degree in co-relation 975. Up to 269 conditions per place. [2024-06-27 20:41:17,374 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 30 selfloop transitions, 12 changer transitions 0/46 dead transitions. [2024-06-27 20:41:17,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 267 flow [2024-06-27 20:41:17,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:41:17,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:41:17,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 87 transitions. [2024-06-27 20:41:17,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-27 20:41:17,377 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 129 flow. Second operand 6 states and 87 transitions. [2024-06-27 20:41:17,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 267 flow [2024-06-27 20:41:17,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 251 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 20:41:17,382 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 181 flow [2024-06-27 20:41:17,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2024-06-27 20:41:17,386 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 14 predicate places. [2024-06-27 20:41:17,386 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 181 flow [2024-06-27 20:41:17,387 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) [2024-06-27 20:41:17,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:17,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:17,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:41:17,388 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)] === [2024-06-27 20:41:17,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:17,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1569247621, now seen corresponding path program 1 times [2024-06-27 20:41:17,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:17,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762473674] [2024-06-27 20:41:17,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:17,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:17,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:17,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:17,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:17,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762473674] [2024-06-27 20:41:17,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762473674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:17,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:17,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:41:17,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015412319] [2024-06-27 20:41:17,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:17,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:41:17,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:17,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:41:17,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:41:17,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:17,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 37 transitions, 181 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) [2024-06-27 20:41:17,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:17,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:17,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:18,069 INFO L124 PetriNetUnfolderBase]: 189/359 cut-off events. [2024-06-27 20:41:18,070 INFO L125 PetriNetUnfolderBase]: For 815/815 co-relation queries the response was YES. [2024-06-27 20:41:18,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1214 conditions, 359 events. 189/359 cut-off events. For 815/815 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1459 event pairs, 53 based on Foata normal form. 2/360 useless extension candidates. Maximal degree in co-relation 1193. Up to 315 conditions per place. [2024-06-27 20:41:18,072 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 38 selfloop transitions, 11 changer transitions 0/53 dead transitions. [2024-06-27 20:41:18,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 53 transitions, 341 flow [2024-06-27 20:41:18,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:41:18,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:41:18,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 96 transitions. [2024-06-27 20:41:18,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:41:18,072 INFO L175 Difference]: Start difference. First operand has 45 places, 37 transitions, 181 flow. Second operand 7 states and 96 transitions. [2024-06-27 20:41:18,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 53 transitions, 341 flow [2024-06-27 20:41:18,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 53 transitions, 327 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 20:41:18,075 INFO L231 Difference]: Finished difference. Result has 51 places, 42 transitions, 236 flow [2024-06-27 20:41:18,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=236, PETRI_PLACES=51, PETRI_TRANSITIONS=42} [2024-06-27 20:41:18,075 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 20 predicate places. [2024-06-27 20:41:18,075 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 42 transitions, 236 flow [2024-06-27 20:41:18,075 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) [2024-06-27 20:41:18,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:18,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:18,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:41:18,076 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)] === [2024-06-27 20:41:18,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:18,076 INFO L85 PathProgramCache]: Analyzing trace with hash -167813091, now seen corresponding path program 2 times [2024-06-27 20:41:18,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:18,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872014614] [2024-06-27 20:41:18,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:18,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:18,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:18,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:18,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:18,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872014614] [2024-06-27 20:41:18,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872014614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:18,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:18,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:41:18,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823294061] [2024-06-27 20:41:18,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:18,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:41:18,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:18,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:41:18,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:41:18,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:18,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 42 transitions, 236 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) [2024-06-27 20:41:18,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:18,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:18,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:18,696 INFO L124 PetriNetUnfolderBase]: 195/373 cut-off events. [2024-06-27 20:41:18,696 INFO L125 PetriNetUnfolderBase]: For 1156/1156 co-relation queries the response was YES. [2024-06-27 20:41:18,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1351 conditions, 373 events. 195/373 cut-off events. For 1156/1156 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1547 event pairs, 50 based on Foata normal form. 2/374 useless extension candidates. Maximal degree in co-relation 1327. Up to 319 conditions per place. [2024-06-27 20:41:18,700 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 37 selfloop transitions, 12 changer transitions 0/53 dead transitions. [2024-06-27 20:41:18,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 53 transitions, 379 flow [2024-06-27 20:41:18,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:41:18,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:41:18,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 84 transitions. [2024-06-27 20:41:18,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 20:41:18,702 INFO L175 Difference]: Start difference. First operand has 51 places, 42 transitions, 236 flow. Second operand 6 states and 84 transitions. [2024-06-27 20:41:18,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 53 transitions, 379 flow [2024-06-27 20:41:18,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 53 transitions, 358 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 20:41:18,705 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 270 flow [2024-06-27 20:41:18,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=270, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2024-06-27 20:41:18,707 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 22 predicate places. [2024-06-27 20:41:18,707 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 270 flow [2024-06-27 20:41:18,707 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) [2024-06-27 20:41:18,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:18,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:18,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:41:18,707 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)] === [2024-06-27 20:41:18,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:18,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1026450471, now seen corresponding path program 3 times [2024-06-27 20:41:18,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:18,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514573573] [2024-06-27 20:41:18,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:18,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:18,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:19,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:19,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:19,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514573573] [2024-06-27 20:41:19,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514573573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:19,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:19,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:41:19,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776928393] [2024-06-27 20:41:19,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:19,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:41:19,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:19,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:41:19,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:41:19,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:19,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 270 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) [2024-06-27 20:41:19,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:19,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:19,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:19,320 INFO L124 PetriNetUnfolderBase]: 185/355 cut-off events. [2024-06-27 20:41:19,321 INFO L125 PetriNetUnfolderBase]: For 1424/1424 co-relation queries the response was YES. [2024-06-27 20:41:19,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1318 conditions, 355 events. 185/355 cut-off events. For 1424/1424 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1436 event pairs, 52 based on Foata normal form. 4/356 useless extension candidates. Maximal degree in co-relation 1293. Up to 269 conditions per place. [2024-06-27 20:41:19,323 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 32 selfloop transitions, 16 changer transitions 0/52 dead transitions. [2024-06-27 20:41:19,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 52 transitions, 390 flow [2024-06-27 20:41:19,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:41:19,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:41:19,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 86 transitions. [2024-06-27 20:41:19,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4479166666666667 [2024-06-27 20:41:19,324 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 270 flow. Second operand 6 states and 86 transitions. [2024-06-27 20:41:19,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 52 transitions, 390 flow [2024-06-27 20:41:19,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 52 transitions, 360 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 20:41:19,327 INFO L231 Difference]: Finished difference. Result has 55 places, 44 transitions, 279 flow [2024-06-27 20:41:19,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=279, PETRI_PLACES=55, PETRI_TRANSITIONS=44} [2024-06-27 20:41:19,327 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 24 predicate places. [2024-06-27 20:41:19,327 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 44 transitions, 279 flow [2024-06-27 20:41:19,328 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) [2024-06-27 20:41:19,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:19,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:19,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:41:19,328 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)] === [2024-06-27 20:41:19,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:19,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1026441543, now seen corresponding path program 1 times [2024-06-27 20:41:19,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:19,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318367545] [2024-06-27 20:41:19,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:19,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:19,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:19,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:19,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:19,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318367545] [2024-06-27 20:41:19,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318367545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:19,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:19,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:41:19,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949538099] [2024-06-27 20:41:19,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:19,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:41:19,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:19,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:41:19,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:41:19,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:19,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 44 transitions, 279 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:19,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:19,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:19,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:19,998 INFO L124 PetriNetUnfolderBase]: 194/374 cut-off events. [2024-06-27 20:41:19,998 INFO L125 PetriNetUnfolderBase]: For 1351/1351 co-relation queries the response was YES. [2024-06-27 20:41:19,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1371 conditions, 374 events. 194/374 cut-off events. For 1351/1351 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1554 event pairs, 49 based on Foata normal form. 3/374 useless extension candidates. Maximal degree in co-relation 1345. Up to 260 conditions per place. [2024-06-27 20:41:20,000 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 34 selfloop transitions, 22 changer transitions 0/60 dead transitions. [2024-06-27 20:41:20,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 60 transitions, 461 flow [2024-06-27 20:41:20,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:41:20,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:41:20,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 101 transitions. [2024-06-27 20:41:20,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45089285714285715 [2024-06-27 20:41:20,002 INFO L175 Difference]: Start difference. First operand has 55 places, 44 transitions, 279 flow. Second operand 7 states and 101 transitions. [2024-06-27 20:41:20,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 60 transitions, 461 flow [2024-06-27 20:41:20,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 60 transitions, 416 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 20:41:20,004 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 314 flow [2024-06-27 20:41:20,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=314, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2024-06-27 20:41:20,005 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 26 predicate places. [2024-06-27 20:41:20,005 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 314 flow [2024-06-27 20:41:20,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:20,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:20,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:20,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:41:20,006 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)] === [2024-06-27 20:41:20,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:20,006 INFO L85 PathProgramCache]: Analyzing trace with hash -899609212, now seen corresponding path program 1 times [2024-06-27 20:41:20,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:20,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540856240] [2024-06-27 20:41:20,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:20,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:20,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:20,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:20,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540856240] [2024-06-27 20:41:20,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540856240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:20,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:20,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:41:20,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431273130] [2024-06-27 20:41:20,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:20,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:41:20,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:20,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:41:20,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:41:20,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:20,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 314 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:20,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:20,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:20,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:20,807 INFO L124 PetriNetUnfolderBase]: 203/385 cut-off events. [2024-06-27 20:41:20,808 INFO L125 PetriNetUnfolderBase]: For 1644/1644 co-relation queries the response was YES. [2024-06-27 20:41:20,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1501 conditions, 385 events. 203/385 cut-off events. For 1644/1644 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1593 event pairs, 54 based on Foata normal form. 3/385 useless extension candidates. Maximal degree in co-relation 1474. Up to 249 conditions per place. [2024-06-27 20:41:20,810 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 37 selfloop transitions, 26 changer transitions 0/67 dead transitions. [2024-06-27 20:41:20,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 67 transitions, 524 flow [2024-06-27 20:41:20,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:41:20,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:41:20,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 115 transitions. [2024-06-27 20:41:20,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44921875 [2024-06-27 20:41:20,811 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 314 flow. Second operand 8 states and 115 transitions. [2024-06-27 20:41:20,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 67 transitions, 524 flow [2024-06-27 20:41:20,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 67 transitions, 499 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 20:41:20,815 INFO L231 Difference]: Finished difference. Result has 62 places, 54 transitions, 383 flow [2024-06-27 20:41:20,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=383, PETRI_PLACES=62, PETRI_TRANSITIONS=54} [2024-06-27 20:41:20,815 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 31 predicate places. [2024-06-27 20:41:20,815 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 54 transitions, 383 flow [2024-06-27 20:41:20,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:20,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:20,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:20,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:41:20,816 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)] === [2024-06-27 20:41:20,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:20,817 INFO L85 PathProgramCache]: Analyzing trace with hash 963063080, now seen corresponding path program 1 times [2024-06-27 20:41:20,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:20,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248340884] [2024-06-27 20:41:20,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:20,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:20,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:21,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:21,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:21,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248340884] [2024-06-27 20:41:21,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248340884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:21,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:21,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:41:21,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835415281] [2024-06-27 20:41:21,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:21,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:41:21,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:21,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:41:21,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:41:21,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:21,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 54 transitions, 383 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:21,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:21,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:21,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:21,859 INFO L124 PetriNetUnfolderBase]: 201/384 cut-off events. [2024-06-27 20:41:21,859 INFO L125 PetriNetUnfolderBase]: For 1958/1958 co-relation queries the response was YES. [2024-06-27 20:41:21,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1618 conditions, 384 events. 201/384 cut-off events. For 1958/1958 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1602 event pairs, 56 based on Foata normal form. 1/384 useless extension candidates. Maximal degree in co-relation 1589. Up to 327 conditions per place. [2024-06-27 20:41:21,861 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 52 selfloop transitions, 12 changer transitions 0/68 dead transitions. [2024-06-27 20:41:21,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 68 transitions, 561 flow [2024-06-27 20:41:21,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:41:21,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:41:21,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 97 transitions. [2024-06-27 20:41:21,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4330357142857143 [2024-06-27 20:41:21,863 INFO L175 Difference]: Start difference. First operand has 62 places, 54 transitions, 383 flow. Second operand 7 states and 97 transitions. [2024-06-27 20:41:21,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 68 transitions, 561 flow [2024-06-27 20:41:21,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 68 transitions, 528 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 20:41:21,867 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 399 flow [2024-06-27 20:41:21,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=399, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2024-06-27 20:41:21,867 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 34 predicate places. [2024-06-27 20:41:21,867 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 399 flow [2024-06-27 20:41:21,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:21,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:21,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:21,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:41:21,868 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)] === [2024-06-27 20:41:21,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:21,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1431876346, now seen corresponding path program 1 times [2024-06-27 20:41:21,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:21,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621994781] [2024-06-27 20:41:21,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:21,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:21,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:22,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:22,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:22,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621994781] [2024-06-27 20:41:22,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621994781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:22,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:22,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:41:22,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757667190] [2024-06-27 20:41:22,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:22,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:41:22,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:22,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:41:22,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:41:22,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:22,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 399 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-27 20:41:22,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:22,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:22,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:22,699 INFO L124 PetriNetUnfolderBase]: 207/396 cut-off events. [2024-06-27 20:41:22,699 INFO L125 PetriNetUnfolderBase]: For 2411/2411 co-relation queries the response was YES. [2024-06-27 20:41:22,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1710 conditions, 396 events. 207/396 cut-off events. For 2411/2411 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1673 event pairs, 50 based on Foata normal form. 2/395 useless extension candidates. Maximal degree in co-relation 1679. Up to 278 conditions per place. [2024-06-27 20:41:22,716 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 43 selfloop transitions, 22 changer transitions 0/69 dead transitions. [2024-06-27 20:41:22,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 69 transitions, 595 flow [2024-06-27 20:41:22,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:41:22,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:41:22,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 101 transitions. [2024-06-27 20:41:22,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45089285714285715 [2024-06-27 20:41:22,717 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 399 flow. Second operand 7 states and 101 transitions. [2024-06-27 20:41:22,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 69 transitions, 595 flow [2024-06-27 20:41:22,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 69 transitions, 562 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 20:41:22,722 INFO L231 Difference]: Finished difference. Result has 67 places, 58 transitions, 429 flow [2024-06-27 20:41:22,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=429, PETRI_PLACES=67, PETRI_TRANSITIONS=58} [2024-06-27 20:41:22,722 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 36 predicate places. [2024-06-27 20:41:22,722 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 58 transitions, 429 flow [2024-06-27 20:41:22,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-27 20:41:22,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:22,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:22,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:41:22,723 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)] === [2024-06-27 20:41:22,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:22,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1432173016, now seen corresponding path program 2 times [2024-06-27 20:41:22,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:22,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958556140] [2024-06-27 20:41:22,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:22,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:22,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:23,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:23,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:23,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958556140] [2024-06-27 20:41:23,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958556140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:23,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:23,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:41:23,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071747880] [2024-06-27 20:41:23,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:23,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:41:23,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:23,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:41:23,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:41:23,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:23,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 58 transitions, 429 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:23,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:23,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:23,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:23,677 INFO L124 PetriNetUnfolderBase]: 203/394 cut-off events. [2024-06-27 20:41:23,677 INFO L125 PetriNetUnfolderBase]: For 2675/2675 co-relation queries the response was YES. [2024-06-27 20:41:23,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1728 conditions, 394 events. 203/394 cut-off events. For 2675/2675 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1674 event pairs, 48 based on Foata normal form. 2/393 useless extension candidates. Maximal degree in co-relation 1696. Up to 275 conditions per place. [2024-06-27 20:41:23,680 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 42 selfloop transitions, 24 changer transitions 0/70 dead transitions. [2024-06-27 20:41:23,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 70 transitions, 597 flow [2024-06-27 20:41:23,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:41:23,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:41:23,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-06-27 20:41:23,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 20:41:23,681 INFO L175 Difference]: Start difference. First operand has 67 places, 58 transitions, 429 flow. Second operand 8 states and 112 transitions. [2024-06-27 20:41:23,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 70 transitions, 597 flow [2024-06-27 20:41:23,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 70 transitions, 542 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 20:41:23,686 INFO L231 Difference]: Finished difference. Result has 70 places, 58 transitions, 427 flow [2024-06-27 20:41:23,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=427, PETRI_PLACES=70, PETRI_TRANSITIONS=58} [2024-06-27 20:41:23,686 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 39 predicate places. [2024-06-27 20:41:23,686 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 58 transitions, 427 flow [2024-06-27 20:41:23,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:23,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:23,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:23,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:41:23,687 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)] === [2024-06-27 20:41:23,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:23,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1432183928, now seen corresponding path program 1 times [2024-06-27 20:41:23,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:23,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723420864] [2024-06-27 20:41:23,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:23,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:23,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:24,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:24,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:24,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723420864] [2024-06-27 20:41:24,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723420864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:24,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:24,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:41:24,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002352833] [2024-06-27 20:41:24,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:24,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:41:24,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:24,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:41:24,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:41:24,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:24,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 58 transitions, 427 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:24,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:24,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:24,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:24,831 INFO L124 PetriNetUnfolderBase]: 207/401 cut-off events. [2024-06-27 20:41:24,831 INFO L125 PetriNetUnfolderBase]: For 2981/2981 co-relation queries the response was YES. [2024-06-27 20:41:24,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1776 conditions, 401 events. 207/401 cut-off events. For 2981/2981 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1703 event pairs, 46 based on Foata normal form. 3/401 useless extension candidates. Maximal degree in co-relation 1743. Up to 245 conditions per place. [2024-06-27 20:41:24,834 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 41 selfloop transitions, 31 changer transitions 0/76 dead transitions. [2024-06-27 20:41:24,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 76 transitions, 665 flow [2024-06-27 20:41:24,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:41:24,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:41:24,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 128 transitions. [2024-06-27 20:41:24,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:41:24,836 INFO L175 Difference]: Start difference. First operand has 70 places, 58 transitions, 427 flow. Second operand 9 states and 128 transitions. [2024-06-27 20:41:24,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 76 transitions, 665 flow [2024-06-27 20:41:24,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 76 transitions, 610 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 20:41:24,845 INFO L231 Difference]: Finished difference. Result has 72 places, 62 transitions, 479 flow [2024-06-27 20:41:24,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=479, PETRI_PLACES=72, PETRI_TRANSITIONS=62} [2024-06-27 20:41:24,846 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 41 predicate places. [2024-06-27 20:41:24,846 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 62 transitions, 479 flow [2024-06-27 20:41:24,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:24,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:24,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:24,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:41:24,847 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)] === [2024-06-27 20:41:24,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:24,847 INFO L85 PathProgramCache]: Analyzing trace with hash -200223423, now seen corresponding path program 1 times [2024-06-27 20:41:24,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:24,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037852941] [2024-06-27 20:41:24,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:24,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:24,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:25,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:25,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:25,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037852941] [2024-06-27 20:41:25,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037852941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:25,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:25,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:41:25,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673127227] [2024-06-27 20:41:25,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:25,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:41:25,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:25,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:41:25,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:41:25,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:25,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 62 transitions, 479 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-27 20:41:25,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:25,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:25,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:25,694 INFO L124 PetriNetUnfolderBase]: 205/391 cut-off events. [2024-06-27 20:41:25,694 INFO L125 PetriNetUnfolderBase]: For 3129/3129 co-relation queries the response was YES. [2024-06-27 20:41:25,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1866 conditions, 391 events. 205/391 cut-off events. For 3129/3129 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1639 event pairs, 47 based on Foata normal form. 1/388 useless extension candidates. Maximal degree in co-relation 1832. Up to 286 conditions per place. [2024-06-27 20:41:25,697 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 46 selfloop transitions, 22 changer transitions 0/72 dead transitions. [2024-06-27 20:41:25,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 72 transitions, 661 flow [2024-06-27 20:41:25,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:41:25,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:41:25,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 87 transitions. [2024-06-27 20:41:25,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-27 20:41:25,698 INFO L175 Difference]: Start difference. First operand has 72 places, 62 transitions, 479 flow. Second operand 6 states and 87 transitions. [2024-06-27 20:41:25,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 72 transitions, 661 flow [2024-06-27 20:41:25,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 72 transitions, 582 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 20:41:25,703 INFO L231 Difference]: Finished difference. Result has 71 places, 64 transitions, 478 flow [2024-06-27 20:41:25,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=478, PETRI_PLACES=71, PETRI_TRANSITIONS=64} [2024-06-27 20:41:25,704 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 40 predicate places. [2024-06-27 20:41:25,704 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 64 transitions, 478 flow [2024-06-27 20:41:25,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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) [2024-06-27 20:41:25,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:25,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:25,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:41:25,705 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)] === [2024-06-27 20:41:25,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:25,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1438494661, now seen corresponding path program 1 times [2024-06-27 20:41:25,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:25,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025936802] [2024-06-27 20:41:25,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:25,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:25,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:26,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:26,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:26,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025936802] [2024-06-27 20:41:26,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025936802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:26,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:26,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:41:26,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091650226] [2024-06-27 20:41:26,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:26,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:41:26,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:26,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:41:26,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:41:26,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:26,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 64 transitions, 478 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:26,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:26,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:26,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:26,552 INFO L124 PetriNetUnfolderBase]: 211/408 cut-off events. [2024-06-27 20:41:26,553 INFO L125 PetriNetUnfolderBase]: For 3627/3627 co-relation queries the response was YES. [2024-06-27 20:41:26,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1921 conditions, 408 events. 211/408 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1734 event pairs, 49 based on Foata normal form. 2/407 useless extension candidates. Maximal degree in co-relation 1886. Up to 257 conditions per place. [2024-06-27 20:41:26,555 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 48 selfloop transitions, 27 changer transitions 0/79 dead transitions. [2024-06-27 20:41:26,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 79 transitions, 716 flow [2024-06-27 20:41:26,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:41:26,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:41:26,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 115 transitions. [2024-06-27 20:41:26,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44921875 [2024-06-27 20:41:26,556 INFO L175 Difference]: Start difference. First operand has 71 places, 64 transitions, 478 flow. Second operand 8 states and 115 transitions. [2024-06-27 20:41:26,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 79 transitions, 716 flow [2024-06-27 20:41:26,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 79 transitions, 678 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 20:41:26,565 INFO L231 Difference]: Finished difference. Result has 75 places, 66 transitions, 513 flow [2024-06-27 20:41:26,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=513, PETRI_PLACES=75, PETRI_TRANSITIONS=66} [2024-06-27 20:41:26,565 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 44 predicate places. [2024-06-27 20:41:26,566 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 66 transitions, 513 flow [2024-06-27 20:41:26,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:26,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:26,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:26,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:41:26,566 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)] === [2024-06-27 20:41:26,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:26,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1236008477, now seen corresponding path program 2 times [2024-06-27 20:41:26,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:26,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595865397] [2024-06-27 20:41:26,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:26,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:26,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:27,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:27,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:27,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595865397] [2024-06-27 20:41:27,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595865397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:27,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:27,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:41:27,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938169940] [2024-06-27 20:41:27,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:27,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:41:27,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:27,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:41:27,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:41:27,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:27,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 66 transitions, 513 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:27,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:27,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:27,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:27,515 INFO L124 PetriNetUnfolderBase]: 217/420 cut-off events. [2024-06-27 20:41:27,515 INFO L125 PetriNetUnfolderBase]: For 4048/4048 co-relation queries the response was YES. [2024-06-27 20:41:27,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2026 conditions, 420 events. 217/420 cut-off events. For 4048/4048 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1824 event pairs, 49 based on Foata normal form. 2/419 useless extension candidates. Maximal degree in co-relation 1990. Up to 263 conditions per place. [2024-06-27 20:41:27,517 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 48 selfloop transitions, 31 changer transitions 0/83 dead transitions. [2024-06-27 20:41:27,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 83 transitions, 773 flow [2024-06-27 20:41:27,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:41:27,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:41:27,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 127 transitions. [2024-06-27 20:41:27,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409722222222222 [2024-06-27 20:41:27,519 INFO L175 Difference]: Start difference. First operand has 75 places, 66 transitions, 513 flow. Second operand 9 states and 127 transitions. [2024-06-27 20:41:27,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 83 transitions, 773 flow [2024-06-27 20:41:27,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 83 transitions, 703 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 20:41:27,525 INFO L231 Difference]: Finished difference. Result has 78 places, 68 transitions, 528 flow [2024-06-27 20:41:27,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=528, PETRI_PLACES=78, PETRI_TRANSITIONS=68} [2024-06-27 20:41:27,525 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 47 predicate places. [2024-06-27 20:41:27,525 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 68 transitions, 528 flow [2024-06-27 20:41:27,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:27,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:27,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:27,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:41:27,526 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)] === [2024-06-27 20:41:27,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:27,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1236334907, now seen corresponding path program 3 times [2024-06-27 20:41:27,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:27,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588314693] [2024-06-27 20:41:27,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:27,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:27,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:28,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:28,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:28,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588314693] [2024-06-27 20:41:28,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588314693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:28,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:28,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:41:28,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141365215] [2024-06-27 20:41:28,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:28,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:41:28,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:28,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:41:28,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:41:28,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:28,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 68 transitions, 528 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:28,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:28,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:28,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:28,448 INFO L124 PetriNetUnfolderBase]: 213/412 cut-off events. [2024-06-27 20:41:28,448 INFO L125 PetriNetUnfolderBase]: For 4174/4174 co-relation queries the response was YES. [2024-06-27 20:41:28,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2008 conditions, 412 events. 213/412 cut-off events. For 4174/4174 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1773 event pairs, 46 based on Foata normal form. 2/411 useless extension candidates. Maximal degree in co-relation 1971. Up to 260 conditions per place. [2024-06-27 20:41:28,451 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 47 selfloop transitions, 31 changer transitions 0/82 dead transitions. [2024-06-27 20:41:28,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 82 transitions, 736 flow [2024-06-27 20:41:28,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:41:28,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:41:28,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 127 transitions. [2024-06-27 20:41:28,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409722222222222 [2024-06-27 20:41:28,460 INFO L175 Difference]: Start difference. First operand has 78 places, 68 transitions, 528 flow. Second operand 9 states and 127 transitions. [2024-06-27 20:41:28,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 82 transitions, 736 flow [2024-06-27 20:41:28,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 82 transitions, 687 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 20:41:28,470 INFO L231 Difference]: Finished difference. Result has 81 places, 68 transitions, 546 flow [2024-06-27 20:41:28,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=546, PETRI_PLACES=81, PETRI_TRANSITIONS=68} [2024-06-27 20:41:28,471 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 50 predicate places. [2024-06-27 20:41:28,471 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 68 transitions, 546 flow [2024-06-27 20:41:28,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:28,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:28,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:28,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:41:28,472 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)] === [2024-06-27 20:41:28,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:28,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1448029765, now seen corresponding path program 1 times [2024-06-27 20:41:28,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:28,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877263932] [2024-06-27 20:41:28,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:28,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:28,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:29,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:29,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:29,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877263932] [2024-06-27 20:41:29,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877263932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:29,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:29,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:41:29,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386601445] [2024-06-27 20:41:29,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:29,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:41:29,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:29,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:41:29,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:41:29,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:29,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 68 transitions, 546 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:29,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:29,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:29,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:29,689 INFO L124 PetriNetUnfolderBase]: 230/451 cut-off events. [2024-06-27 20:41:29,690 INFO L125 PetriNetUnfolderBase]: For 6183/6183 co-relation queries the response was YES. [2024-06-27 20:41:29,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2117 conditions, 451 events. 230/451 cut-off events. For 6183/6183 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1997 event pairs, 52 based on Foata normal form. 14/462 useless extension candidates. Maximal degree in co-relation 2079. Up to 236 conditions per place. [2024-06-27 20:41:29,693 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 42 selfloop transitions, 35 changer transitions 7/88 dead transitions. [2024-06-27 20:41:29,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 88 transitions, 796 flow [2024-06-27 20:41:29,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:41:29,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:41:29,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 142 transitions. [2024-06-27 20:41:29,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-27 20:41:29,696 INFO L175 Difference]: Start difference. First operand has 81 places, 68 transitions, 546 flow. Second operand 10 states and 142 transitions. [2024-06-27 20:41:29,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 88 transitions, 796 flow [2024-06-27 20:41:29,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 88 transitions, 703 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 20:41:29,706 INFO L231 Difference]: Finished difference. Result has 82 places, 67 transitions, 527 flow [2024-06-27 20:41:29,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=527, PETRI_PLACES=82, PETRI_TRANSITIONS=67} [2024-06-27 20:41:29,707 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 51 predicate places. [2024-06-27 20:41:29,707 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 67 transitions, 527 flow [2024-06-27 20:41:29,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:29,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:29,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:29,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:41:29,708 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)] === [2024-06-27 20:41:29,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:29,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1139387433, now seen corresponding path program 1 times [2024-06-27 20:41:29,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:29,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822468142] [2024-06-27 20:41:29,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:29,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:29,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:30,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:30,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:30,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822468142] [2024-06-27 20:41:30,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822468142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:30,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:30,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:41:30,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243828187] [2024-06-27 20:41:30,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:30,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:41:30,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:30,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:41:30,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:41:30,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:30,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 67 transitions, 527 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:30,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:30,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:30,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:30,651 INFO L124 PetriNetUnfolderBase]: 222/441 cut-off events. [2024-06-27 20:41:30,651 INFO L125 PetriNetUnfolderBase]: For 4890/4890 co-relation queries the response was YES. [2024-06-27 20:41:30,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2157 conditions, 441 events. 222/441 cut-off events. For 4890/4890 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1958 event pairs, 33 based on Foata normal form. 2/442 useless extension candidates. Maximal degree in co-relation 2118. Up to 353 conditions per place. [2024-06-27 20:41:30,655 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 67 selfloop transitions, 12 changer transitions 0/83 dead transitions. [2024-06-27 20:41:30,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 83 transitions, 733 flow [2024-06-27 20:41:30,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:41:30,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:41:30,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 107 transitions. [2024-06-27 20:41:30,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41796875 [2024-06-27 20:41:30,656 INFO L175 Difference]: Start difference. First operand has 82 places, 67 transitions, 527 flow. Second operand 8 states and 107 transitions. [2024-06-27 20:41:30,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 83 transitions, 733 flow [2024-06-27 20:41:30,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 83 transitions, 654 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 20:41:30,663 INFO L231 Difference]: Finished difference. Result has 82 places, 68 transitions, 486 flow [2024-06-27 20:41:30,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=486, PETRI_PLACES=82, PETRI_TRANSITIONS=68} [2024-06-27 20:41:30,664 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 51 predicate places. [2024-06-27 20:41:30,664 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 68 transitions, 486 flow [2024-06-27 20:41:30,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:30,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:30,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:30,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:41:30,665 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)] === [2024-06-27 20:41:30,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:30,665 INFO L85 PathProgramCache]: Analyzing trace with hash 2135025627, now seen corresponding path program 2 times [2024-06-27 20:41:30,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:30,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506720593] [2024-06-27 20:41:30,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:30,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:30,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:31,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:31,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:31,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506720593] [2024-06-27 20:41:31,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506720593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:31,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:31,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:41:31,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806668556] [2024-06-27 20:41:31,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:31,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:41:31,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:31,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:41:31,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:41:31,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:31,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 68 transitions, 486 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:31,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:31,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:31,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:31,623 INFO L124 PetriNetUnfolderBase]: 226/453 cut-off events. [2024-06-27 20:41:31,623 INFO L125 PetriNetUnfolderBase]: For 5273/5273 co-relation queries the response was YES. [2024-06-27 20:41:31,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2138 conditions, 453 events. 226/453 cut-off events. For 5273/5273 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2058 event pairs, 53 based on Foata normal form. 2/454 useless extension candidates. Maximal degree in co-relation 2098. Up to 378 conditions per place. [2024-06-27 20:41:31,626 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 66 selfloop transitions, 13 changer transitions 0/83 dead transitions. [2024-06-27 20:41:31,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 83 transitions, 692 flow [2024-06-27 20:41:31,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:41:31,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:41:31,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 108 transitions. [2024-06-27 20:41:31,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-27 20:41:31,629 INFO L175 Difference]: Start difference. First operand has 82 places, 68 transitions, 486 flow. Second operand 8 states and 108 transitions. [2024-06-27 20:41:31,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 83 transitions, 692 flow [2024-06-27 20:41:31,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 83 transitions, 655 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 20:41:31,639 INFO L231 Difference]: Finished difference. Result has 83 places, 69 transitions, 491 flow [2024-06-27 20:41:31,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=491, PETRI_PLACES=83, PETRI_TRANSITIONS=69} [2024-06-27 20:41:31,640 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 52 predicate places. [2024-06-27 20:41:31,640 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 69 transitions, 491 flow [2024-06-27 20:41:31,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:31,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:31,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:31,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:41:31,641 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)] === [2024-06-27 20:41:31,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:31,641 INFO L85 PathProgramCache]: Analyzing trace with hash 412390527, now seen corresponding path program 1 times [2024-06-27 20:41:31,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:31,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743915995] [2024-06-27 20:41:31,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:31,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:32,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:32,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:32,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743915995] [2024-06-27 20:41:32,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743915995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:32,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:32,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:41:32,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745707783] [2024-06-27 20:41:32,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:32,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:41:32,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:32,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:41:32,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:41:32,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:32,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 69 transitions, 491 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:32,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:32,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:32,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:32,545 INFO L124 PetriNetUnfolderBase]: 224/441 cut-off events. [2024-06-27 20:41:32,546 INFO L125 PetriNetUnfolderBase]: For 4951/4951 co-relation queries the response was YES. [2024-06-27 20:41:32,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2088 conditions, 441 events. 224/441 cut-off events. For 4951/4951 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1970 event pairs, 49 based on Foata normal form. 1/438 useless extension candidates. Maximal degree in co-relation 2048. Up to 304 conditions per place. [2024-06-27 20:41:32,548 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 47 selfloop transitions, 30 changer transitions 0/81 dead transitions. [2024-06-27 20:41:32,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 81 transitions, 707 flow [2024-06-27 20:41:32,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:41:32,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:41:32,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 101 transitions. [2024-06-27 20:41:32,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45089285714285715 [2024-06-27 20:41:32,551 INFO L175 Difference]: Start difference. First operand has 83 places, 69 transitions, 491 flow. Second operand 7 states and 101 transitions. [2024-06-27 20:41:32,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 81 transitions, 707 flow [2024-06-27 20:41:32,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 81 transitions, 675 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 20:41:32,558 INFO L231 Difference]: Finished difference. Result has 84 places, 71 transitions, 552 flow [2024-06-27 20:41:32,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=552, PETRI_PLACES=84, PETRI_TRANSITIONS=71} [2024-06-27 20:41:32,559 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 53 predicate places. [2024-06-27 20:41:32,559 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 71 transitions, 552 flow [2024-06-27 20:41:32,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:32,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:32,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:32,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:41:32,559 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)] === [2024-06-27 20:41:32,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:32,560 INFO L85 PathProgramCache]: Analyzing trace with hash -941365089, now seen corresponding path program 3 times [2024-06-27 20:41:32,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:32,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045431685] [2024-06-27 20:41:32,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:32,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:32,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:33,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:33,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:33,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045431685] [2024-06-27 20:41:33,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045431685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:33,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:33,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:41:33,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799156909] [2024-06-27 20:41:33,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:33,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:41:33,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:33,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:41:33,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:41:33,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:33,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 71 transitions, 552 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:33,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:33,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:33,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:33,538 INFO L124 PetriNetUnfolderBase]: 228/459 cut-off events. [2024-06-27 20:41:33,538 INFO L125 PetriNetUnfolderBase]: For 5564/5564 co-relation queries the response was YES. [2024-06-27 20:41:33,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2223 conditions, 459 events. 228/459 cut-off events. For 5564/5564 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2039 event pairs, 41 based on Foata normal form. 2/459 useless extension candidates. Maximal degree in co-relation 2182. Up to 392 conditions per place. [2024-06-27 20:41:33,541 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 66 selfloop transitions, 16 changer transitions 0/86 dead transitions. [2024-06-27 20:41:33,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 86 transitions, 791 flow [2024-06-27 20:41:33,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:41:33,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:41:33,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2024-06-27 20:41:33,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-27 20:41:33,542 INFO L175 Difference]: Start difference. First operand has 84 places, 71 transitions, 552 flow. Second operand 9 states and 114 transitions. [2024-06-27 20:41:33,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 86 transitions, 791 flow [2024-06-27 20:41:33,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 86 transitions, 722 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 20:41:33,549 INFO L231 Difference]: Finished difference. Result has 90 places, 77 transitions, 593 flow [2024-06-27 20:41:33,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=593, PETRI_PLACES=90, PETRI_TRANSITIONS=77} [2024-06-27 20:41:33,549 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 59 predicate places. [2024-06-27 20:41:33,549 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 77 transitions, 593 flow [2024-06-27 20:41:33,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:33,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:33,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:33,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:41:33,550 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)] === [2024-06-27 20:41:33,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:33,550 INFO L85 PathProgramCache]: Analyzing trace with hash 674963257, now seen corresponding path program 4 times [2024-06-27 20:41:33,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:33,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913246906] [2024-06-27 20:41:33,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:33,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:33,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:34,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:34,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:34,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913246906] [2024-06-27 20:41:34,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913246906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:34,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:34,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:41:34,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442386053] [2024-06-27 20:41:34,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:34,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:41:34,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:34,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:41:34,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:41:34,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:34,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 77 transitions, 593 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:34,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:34,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:34,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:34,547 INFO L124 PetriNetUnfolderBase]: 236/474 cut-off events. [2024-06-27 20:41:34,547 INFO L125 PetriNetUnfolderBase]: For 6186/6186 co-relation queries the response was YES. [2024-06-27 20:41:34,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2295 conditions, 474 events. 236/474 cut-off events. For 6186/6186 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2154 event pairs, 42 based on Foata normal form. 4/474 useless extension candidates. Maximal degree in co-relation 2251. Up to 344 conditions per place. [2024-06-27 20:41:34,550 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 64 selfloop transitions, 24 changer transitions 0/92 dead transitions. [2024-06-27 20:41:34,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 92 transitions, 849 flow [2024-06-27 20:41:34,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:41:34,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:41:34,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 110 transitions. [2024-06-27 20:41:34,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4296875 [2024-06-27 20:41:34,552 INFO L175 Difference]: Start difference. First operand has 90 places, 77 transitions, 593 flow. Second operand 8 states and 110 transitions. [2024-06-27 20:41:34,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 92 transitions, 849 flow [2024-06-27 20:41:34,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 92 transitions, 806 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 20:41:34,559 INFO L231 Difference]: Finished difference. Result has 95 places, 82 transitions, 660 flow [2024-06-27 20:41:34,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=660, PETRI_PLACES=95, PETRI_TRANSITIONS=82} [2024-06-27 20:41:34,560 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 64 predicate places. [2024-06-27 20:41:34,560 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 82 transitions, 660 flow [2024-06-27 20:41:34,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:34,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:34,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:34,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:41:34,561 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)] === [2024-06-27 20:41:34,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:34,561 INFO L85 PathProgramCache]: Analyzing trace with hash 43224603, now seen corresponding path program 1 times [2024-06-27 20:41:34,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:34,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688210703] [2024-06-27 20:41:34,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:34,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:34,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:35,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:35,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:35,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688210703] [2024-06-27 20:41:35,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688210703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:35,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:35,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:41:35,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118686374] [2024-06-27 20:41:35,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:35,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:41:35,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:35,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:41:35,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:41:35,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:35,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 82 transitions, 660 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:35,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:35,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:35,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:35,611 INFO L124 PetriNetUnfolderBase]: 242/484 cut-off events. [2024-06-27 20:41:35,611 INFO L125 PetriNetUnfolderBase]: For 6487/6487 co-relation queries the response was YES. [2024-06-27 20:41:35,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2420 conditions, 484 events. 242/484 cut-off events. For 6487/6487 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2202 event pairs, 39 based on Foata normal form. 2/484 useless extension candidates. Maximal degree in co-relation 2374. Up to 320 conditions per place. [2024-06-27 20:41:35,615 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 59 selfloop transitions, 34 changer transitions 0/97 dead transitions. [2024-06-27 20:41:35,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 97 transitions, 946 flow [2024-06-27 20:41:35,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:41:35,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:41:35,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 126 transitions. [2024-06-27 20:41:35,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 20:41:35,616 INFO L175 Difference]: Start difference. First operand has 95 places, 82 transitions, 660 flow. Second operand 9 states and 126 transitions. [2024-06-27 20:41:35,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 97 transitions, 946 flow [2024-06-27 20:41:35,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 97 transitions, 879 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 20:41:35,626 INFO L231 Difference]: Finished difference. Result has 99 places, 85 transitions, 707 flow [2024-06-27 20:41:35,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=707, PETRI_PLACES=99, PETRI_TRANSITIONS=85} [2024-06-27 20:41:35,627 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 68 predicate places. [2024-06-27 20:41:35,627 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 85 transitions, 707 flow [2024-06-27 20:41:35,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:35,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:35,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:35,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:41:35,628 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)] === [2024-06-27 20:41:35,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:35,628 INFO L85 PathProgramCache]: Analyzing trace with hash 799685313, now seen corresponding path program 2 times [2024-06-27 20:41:35,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:35,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002439335] [2024-06-27 20:41:35,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:35,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:35,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:36,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:36,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:36,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002439335] [2024-06-27 20:41:36,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002439335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:36,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:36,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:41:36,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817468737] [2024-06-27 20:41:36,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:36,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:41:36,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:36,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:41:36,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:41:36,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:36,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 85 transitions, 707 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:36,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:36,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:36,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:36,868 INFO L124 PetriNetUnfolderBase]: 245/501 cut-off events. [2024-06-27 20:41:36,868 INFO L125 PetriNetUnfolderBase]: For 6626/6626 co-relation queries the response was YES. [2024-06-27 20:41:36,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2526 conditions, 501 events. 245/501 cut-off events. For 6626/6626 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2364 event pairs, 33 based on Foata normal form. 1/500 useless extension candidates. Maximal degree in co-relation 2479. Up to 380 conditions per place. [2024-06-27 20:41:36,873 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 74 selfloop transitions, 30 changer transitions 2/110 dead transitions. [2024-06-27 20:41:36,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 110 transitions, 1101 flow [2024-06-27 20:41:36,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:41:36,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:41:36,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 133 transitions. [2024-06-27 20:41:36,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-27 20:41:36,874 INFO L175 Difference]: Start difference. First operand has 99 places, 85 transitions, 707 flow. Second operand 10 states and 133 transitions. [2024-06-27 20:41:36,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 110 transitions, 1101 flow [2024-06-27 20:41:36,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 110 transitions, 1000 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 20:41:36,885 INFO L231 Difference]: Finished difference. Result has 106 places, 98 transitions, 854 flow [2024-06-27 20:41:36,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=854, PETRI_PLACES=106, PETRI_TRANSITIONS=98} [2024-06-27 20:41:36,886 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 75 predicate places. [2024-06-27 20:41:36,886 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 98 transitions, 854 flow [2024-06-27 20:41:36,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:36,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:36,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:36,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:41:36,887 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)] === [2024-06-27 20:41:36,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:36,887 INFO L85 PathProgramCache]: Analyzing trace with hash 338799993, now seen corresponding path program 3 times [2024-06-27 20:41:36,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:36,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451227988] [2024-06-27 20:41:36,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:36,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:36,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:37,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:37,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:37,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451227988] [2024-06-27 20:41:37,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451227988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:37,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:37,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:41:37,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762117371] [2024-06-27 20:41:37,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:37,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:41:37,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:37,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:41:37,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:41:37,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:37,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 98 transitions, 854 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:37,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:37,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:37,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:38,098 INFO L124 PetriNetUnfolderBase]: 237/483 cut-off events. [2024-06-27 20:41:38,098 INFO L125 PetriNetUnfolderBase]: For 7069/7069 co-relation queries the response was YES. [2024-06-27 20:41:38,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2531 conditions, 483 events. 237/483 cut-off events. For 7069/7069 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2253 event pairs, 29 based on Foata normal form. 1/482 useless extension candidates. Maximal degree in co-relation 2479. Up to 350 conditions per place. [2024-06-27 20:41:38,102 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 75 selfloop transitions, 36 changer transitions 2/117 dead transitions. [2024-06-27 20:41:38,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 117 transitions, 1246 flow [2024-06-27 20:41:38,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:41:38,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:41:38,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 145 transitions. [2024-06-27 20:41:38,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119318181818182 [2024-06-27 20:41:38,112 INFO L175 Difference]: Start difference. First operand has 106 places, 98 transitions, 854 flow. Second operand 11 states and 145 transitions. [2024-06-27 20:41:38,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 117 transitions, 1246 flow [2024-06-27 20:41:38,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 117 transitions, 1112 flow, removed 59 selfloop flow, removed 3 redundant places. [2024-06-27 20:41:38,126 INFO L231 Difference]: Finished difference. Result has 114 places, 103 transitions, 878 flow [2024-06-27 20:41:38,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=878, PETRI_PLACES=114, PETRI_TRANSITIONS=103} [2024-06-27 20:41:38,127 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 83 predicate places. [2024-06-27 20:41:38,127 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 103 transitions, 878 flow [2024-06-27 20:41:38,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:38,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:38,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:38,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:41:38,128 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)] === [2024-06-27 20:41:38,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:38,128 INFO L85 PathProgramCache]: Analyzing trace with hash 338443803, now seen corresponding path program 4 times [2024-06-27 20:41:38,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:38,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037125853] [2024-06-27 20:41:38,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:38,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:38,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:38,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:38,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:38,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037125853] [2024-06-27 20:41:38,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037125853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:38,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:38,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:41:38,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131247037] [2024-06-27 20:41:38,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:38,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:41:38,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:38,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:41:38,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:41:38,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:38,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 103 transitions, 878 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:38,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:38,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:38,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:39,167 INFO L124 PetriNetUnfolderBase]: 232/471 cut-off events. [2024-06-27 20:41:39,167 INFO L125 PetriNetUnfolderBase]: For 6793/6793 co-relation queries the response was YES. [2024-06-27 20:41:39,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2432 conditions, 471 events. 232/471 cut-off events. For 6793/6793 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2157 event pairs, 29 based on Foata normal form. 1/470 useless extension candidates. Maximal degree in co-relation 2379. Up to 352 conditions per place. [2024-06-27 20:41:39,177 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 78 selfloop transitions, 31 changer transitions 0/113 dead transitions. [2024-06-27 20:41:39,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 113 transitions, 1123 flow [2024-06-27 20:41:39,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:41:39,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:41:39,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 131 transitions. [2024-06-27 20:41:39,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409375 [2024-06-27 20:41:39,178 INFO L175 Difference]: Start difference. First operand has 114 places, 103 transitions, 878 flow. Second operand 10 states and 131 transitions. [2024-06-27 20:41:39,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 113 transitions, 1123 flow [2024-06-27 20:41:39,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 113 transitions, 1071 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 20:41:39,190 INFO L231 Difference]: Finished difference. Result has 119 places, 103 transitions, 893 flow [2024-06-27 20:41:39,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=893, PETRI_PLACES=119, PETRI_TRANSITIONS=103} [2024-06-27 20:41:39,194 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 88 predicate places. [2024-06-27 20:41:39,194 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 103 transitions, 893 flow [2024-06-27 20:41:39,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:39,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:39,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:39,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:41:39,195 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)] === [2024-06-27 20:41:39,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:39,195 INFO L85 PathProgramCache]: Analyzing trace with hash 521621305, now seen corresponding path program 5 times [2024-06-27 20:41:39,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:39,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124670316] [2024-06-27 20:41:39,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:39,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:39,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:39,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:39,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:39,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124670316] [2024-06-27 20:41:39,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124670316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:39,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:39,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:41:39,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50640057] [2024-06-27 20:41:39,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:39,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:41:39,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:39,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:41:39,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:41:39,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:39,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 103 transitions, 893 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:39,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:39,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:39,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:39,937 INFO L124 PetriNetUnfolderBase]: 229/464 cut-off events. [2024-06-27 20:41:39,937 INFO L125 PetriNetUnfolderBase]: For 6956/6956 co-relation queries the response was YES. [2024-06-27 20:41:39,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2410 conditions, 464 events. 229/464 cut-off events. For 6956/6956 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2095 event pairs, 25 based on Foata normal form. 2/465 useless extension candidates. Maximal degree in co-relation 2355. Up to 390 conditions per place. [2024-06-27 20:41:39,941 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 96 selfloop transitions, 16 changer transitions 0/116 dead transitions. [2024-06-27 20:41:39,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 116 transitions, 1160 flow [2024-06-27 20:41:39,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:41:39,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:41:39,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2024-06-27 20:41:39,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-27 20:41:39,942 INFO L175 Difference]: Start difference. First operand has 119 places, 103 transitions, 893 flow. Second operand 9 states and 117 transitions. [2024-06-27 20:41:39,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 116 transitions, 1160 flow [2024-06-27 20:41:39,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 116 transitions, 1088 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 20:41:39,952 INFO L231 Difference]: Finished difference. Result has 120 places, 104 transitions, 875 flow [2024-06-27 20:41:39,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=875, PETRI_PLACES=120, PETRI_TRANSITIONS=104} [2024-06-27 20:41:39,953 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 89 predicate places. [2024-06-27 20:41:39,953 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 104 transitions, 875 flow [2024-06-27 20:41:39,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:39,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:39,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:39,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:41:39,954 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)] === [2024-06-27 20:41:39,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:39,955 INFO L85 PathProgramCache]: Analyzing trace with hash -101658072, now seen corresponding path program 1 times [2024-06-27 20:41:39,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:39,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563507494] [2024-06-27 20:41:39,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:39,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:39,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:40,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:40,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:40,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563507494] [2024-06-27 20:41:40,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563507494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:40,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:40,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:41:40,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156984398] [2024-06-27 20:41:40,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:40,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:41:40,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:40,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:41:40,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:41:40,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:40,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 104 transitions, 875 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:40,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:40,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:40,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:40,887 INFO L124 PetriNetUnfolderBase]: 236/471 cut-off events. [2024-06-27 20:41:40,887 INFO L125 PetriNetUnfolderBase]: For 7712/7712 co-relation queries the response was YES. [2024-06-27 20:41:40,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2444 conditions, 471 events. 236/471 cut-off events. For 7712/7712 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2164 event pairs, 37 based on Foata normal form. 2/470 useless extension candidates. Maximal degree in co-relation 2387. Up to 362 conditions per place. [2024-06-27 20:41:40,890 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 85 selfloop transitions, 26 changer transitions 0/115 dead transitions. [2024-06-27 20:41:40,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 115 transitions, 1142 flow [2024-06-27 20:41:40,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:41:40,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:41:40,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 106 transitions. [2024-06-27 20:41:40,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4140625 [2024-06-27 20:41:40,892 INFO L175 Difference]: Start difference. First operand has 120 places, 104 transitions, 875 flow. Second operand 8 states and 106 transitions. [2024-06-27 20:41:40,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 115 transitions, 1142 flow [2024-06-27 20:41:40,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 115 transitions, 1078 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 20:41:40,905 INFO L231 Difference]: Finished difference. Result has 121 places, 107 transitions, 896 flow [2024-06-27 20:41:40,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=896, PETRI_PLACES=121, PETRI_TRANSITIONS=107} [2024-06-27 20:41:40,906 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 90 predicate places. [2024-06-27 20:41:40,906 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 107 transitions, 896 flow [2024-06-27 20:41:40,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:40,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:40,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:40,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 20:41:40,907 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)] === [2024-06-27 20:41:40,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:40,907 INFO L85 PathProgramCache]: Analyzing trace with hash -961271222, now seen corresponding path program 2 times [2024-06-27 20:41:40,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:40,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786635276] [2024-06-27 20:41:40,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:40,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:40,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:41,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:41,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:41,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786635276] [2024-06-27 20:41:41,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786635276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:41,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:41,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:41:41,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854926477] [2024-06-27 20:41:41,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:41,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:41:41,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:41,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:41:41,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:41:41,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:41,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 107 transitions, 896 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:41,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:41,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:41,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:41,831 INFO L124 PetriNetUnfolderBase]: 240/477 cut-off events. [2024-06-27 20:41:41,831 INFO L125 PetriNetUnfolderBase]: For 8069/8069 co-relation queries the response was YES. [2024-06-27 20:41:41,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2472 conditions, 477 events. 240/477 cut-off events. For 8069/8069 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2197 event pairs, 21 based on Foata normal form. 2/474 useless extension candidates. Maximal degree in co-relation 2415. Up to 377 conditions per place. [2024-06-27 20:41:41,834 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 104 selfloop transitions, 10 changer transitions 0/118 dead transitions. [2024-06-27 20:41:41,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 118 transitions, 1160 flow [2024-06-27 20:41:41,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:41:41,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:41:41,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 92 transitions. [2024-06-27 20:41:41,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-27 20:41:41,835 INFO L175 Difference]: Start difference. First operand has 121 places, 107 transitions, 896 flow. Second operand 7 states and 92 transitions. [2024-06-27 20:41:41,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 118 transitions, 1160 flow [2024-06-27 20:41:41,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 118 transitions, 1111 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 20:41:41,847 INFO L231 Difference]: Finished difference. Result has 123 places, 108 transitions, 883 flow [2024-06-27 20:41:41,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=847, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=883, PETRI_PLACES=123, PETRI_TRANSITIONS=108} [2024-06-27 20:41:41,847 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 92 predicate places. [2024-06-27 20:41:41,847 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 108 transitions, 883 flow [2024-06-27 20:41:41,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:41,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:41,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:41,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 20:41:41,848 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)] === [2024-06-27 20:41:41,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:41,849 INFO L85 PathProgramCache]: Analyzing trace with hash 671906856, now seen corresponding path program 3 times [2024-06-27 20:41:41,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:41,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205880139] [2024-06-27 20:41:41,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:41,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:42,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:42,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:42,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205880139] [2024-06-27 20:41:42,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205880139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:42,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:42,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:41:42,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056785716] [2024-06-27 20:41:42,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:42,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:41:42,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:42,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:41:42,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:41:42,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:42,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 108 transitions, 883 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:42,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:42,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:42,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:42,702 INFO L124 PetriNetUnfolderBase]: 244/485 cut-off events. [2024-06-27 20:41:42,703 INFO L125 PetriNetUnfolderBase]: For 8585/8585 co-relation queries the response was YES. [2024-06-27 20:41:42,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2497 conditions, 485 events. 244/485 cut-off events. For 8585/8585 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2240 event pairs, 38 based on Foata normal form. 2/482 useless extension candidates. Maximal degree in co-relation 2440. Up to 299 conditions per place. [2024-06-27 20:41:42,706 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 87 selfloop transitions, 28 changer transitions 0/119 dead transitions. [2024-06-27 20:41:42,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 119 transitions, 1207 flow [2024-06-27 20:41:42,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:41:42,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:41:42,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 98 transitions. [2024-06-27 20:41:42,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 20:41:42,707 INFO L175 Difference]: Start difference. First operand has 123 places, 108 transitions, 883 flow. Second operand 7 states and 98 transitions. [2024-06-27 20:41:42,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 119 transitions, 1207 flow [2024-06-27 20:41:42,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 119 transitions, 1181 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 20:41:42,721 INFO L231 Difference]: Finished difference. Result has 125 places, 109 transitions, 932 flow [2024-06-27 20:41:42,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=857, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=932, PETRI_PLACES=125, PETRI_TRANSITIONS=109} [2024-06-27 20:41:42,722 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 94 predicate places. [2024-06-27 20:41:42,722 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 109 transitions, 932 flow [2024-06-27 20:41:42,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:42,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:42,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:42,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 20:41:42,723 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)] === [2024-06-27 20:41:42,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:42,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1614053190, now seen corresponding path program 4 times [2024-06-27 20:41:42,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:42,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053691390] [2024-06-27 20:41:42,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:42,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:42,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:43,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:43,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:43,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053691390] [2024-06-27 20:41:43,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053691390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:43,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:43,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:41:43,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440544624] [2024-06-27 20:41:43,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:43,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:41:43,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:43,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:41:43,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:41:43,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:43,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 109 transitions, 932 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:43,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:43,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:43,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:43,626 INFO L124 PetriNetUnfolderBase]: 241/480 cut-off events. [2024-06-27 20:41:43,626 INFO L125 PetriNetUnfolderBase]: For 8605/8605 co-relation queries the response was YES. [2024-06-27 20:41:43,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2480 conditions, 480 events. 241/480 cut-off events. For 8605/8605 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2242 event pairs, 39 based on Foata normal form. 2/477 useless extension candidates. Maximal degree in co-relation 2422. Up to 347 conditions per place. [2024-06-27 20:41:43,629 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 82 selfloop transitions, 31 changer transitions 0/117 dead transitions. [2024-06-27 20:41:43,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 117 transitions, 1180 flow [2024-06-27 20:41:43,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:41:43,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:41:43,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 98 transitions. [2024-06-27 20:41:43,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 20:41:43,630 INFO L175 Difference]: Start difference. First operand has 125 places, 109 transitions, 932 flow. Second operand 7 states and 98 transitions. [2024-06-27 20:41:43,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 117 transitions, 1180 flow [2024-06-27 20:41:43,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 117 transitions, 1127 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 20:41:43,646 INFO L231 Difference]: Finished difference. Result has 128 places, 109 transitions, 948 flow [2024-06-27 20:41:43,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=879, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=948, PETRI_PLACES=128, PETRI_TRANSITIONS=109} [2024-06-27 20:41:43,647 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 97 predicate places. [2024-06-27 20:41:43,647 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 109 transitions, 948 flow [2024-06-27 20:41:43,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:43,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:43,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:43,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 20:41:43,647 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)] === [2024-06-27 20:41:43,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:43,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1614059142, now seen corresponding path program 1 times [2024-06-27 20:41:43,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:43,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920926541] [2024-06-27 20:41:43,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:43,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:43,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:44,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:44,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:44,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920926541] [2024-06-27 20:41:44,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920926541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:44,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:44,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:41:44,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522445658] [2024-06-27 20:41:44,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:44,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:41:44,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:44,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:41:44,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:41:44,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:44,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 109 transitions, 948 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:44,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:44,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:44,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:44,459 INFO L124 PetriNetUnfolderBase]: 239/477 cut-off events. [2024-06-27 20:41:44,459 INFO L125 PetriNetUnfolderBase]: For 8117/8117 co-relation queries the response was YES. [2024-06-27 20:41:44,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2453 conditions, 477 events. 239/477 cut-off events. For 8117/8117 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2216 event pairs, 38 based on Foata normal form. 1/473 useless extension candidates. Maximal degree in co-relation 2394. Up to 297 conditions per place. [2024-06-27 20:41:44,462 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 68 selfloop transitions, 47 changer transitions 0/119 dead transitions. [2024-06-27 20:41:44,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 119 transitions, 1224 flow [2024-06-27 20:41:44,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:41:44,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:41:44,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 114 transitions. [2024-06-27 20:41:44,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4453125 [2024-06-27 20:41:44,463 INFO L175 Difference]: Start difference. First operand has 128 places, 109 transitions, 948 flow. Second operand 8 states and 114 transitions. [2024-06-27 20:41:44,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 119 transitions, 1224 flow [2024-06-27 20:41:44,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 119 transitions, 1149 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 20:41:44,479 INFO L231 Difference]: Finished difference. Result has 130 places, 111 transitions, 1003 flow [2024-06-27 20:41:44,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=873, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1003, PETRI_PLACES=130, PETRI_TRANSITIONS=111} [2024-06-27 20:41:44,479 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 99 predicate places. [2024-06-27 20:41:44,479 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 111 transitions, 1003 flow [2024-06-27 20:41:44,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:44,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:44,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:44,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 20:41:44,480 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)] === [2024-06-27 20:41:44,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:44,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1339963650, now seen corresponding path program 1 times [2024-06-27 20:41:44,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:44,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067751308] [2024-06-27 20:41:44,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:44,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:44,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:45,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:45,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:45,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067751308] [2024-06-27 20:41:45,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067751308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:45,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:45,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:41:45,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282501800] [2024-06-27 20:41:45,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:45,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:41:45,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:45,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:41:45,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:41:45,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:45,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 111 transitions, 1003 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:45,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:45,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:45,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:45,723 INFO L124 PetriNetUnfolderBase]: 259/523 cut-off events. [2024-06-27 20:41:45,723 INFO L125 PetriNetUnfolderBase]: For 12953/12953 co-relation queries the response was YES. [2024-06-27 20:41:45,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2671 conditions, 523 events. 259/523 cut-off events. For 12953/12953 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2476 event pairs, 41 based on Foata normal form. 12/532 useless extension candidates. Maximal degree in co-relation 2611. Up to 311 conditions per place. [2024-06-27 20:41:45,726 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 79 selfloop transitions, 36 changer transitions 8/127 dead transitions. [2024-06-27 20:41:45,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 127 transitions, 1336 flow [2024-06-27 20:41:45,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:41:45,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:41:45,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 141 transitions. [2024-06-27 20:41:45,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-27 20:41:45,735 INFO L175 Difference]: Start difference. First operand has 130 places, 111 transitions, 1003 flow. Second operand 10 states and 141 transitions. [2024-06-27 20:41:45,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 127 transitions, 1336 flow [2024-06-27 20:41:45,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 127 transitions, 1227 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 20:41:45,754 INFO L231 Difference]: Finished difference. Result has 133 places, 109 transitions, 966 flow [2024-06-27 20:41:45,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=894, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=966, PETRI_PLACES=133, PETRI_TRANSITIONS=109} [2024-06-27 20:41:45,754 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 102 predicate places. [2024-06-27 20:41:45,755 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 109 transitions, 966 flow [2024-06-27 20:41:45,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:45,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:45,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:45,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 20:41:45,755 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)] === [2024-06-27 20:41:45,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:45,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1901824258, now seen corresponding path program 2 times [2024-06-27 20:41:45,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:45,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078953974] [2024-06-27 20:41:45,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:45,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:45,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:46,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:46,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:46,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078953974] [2024-06-27 20:41:46,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078953974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:46,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:46,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:41:46,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669419773] [2024-06-27 20:41:46,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:46,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:41:46,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:46,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:41:46,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:41:46,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:46,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 109 transitions, 966 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:46,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:46,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:46,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:46,951 INFO L124 PetriNetUnfolderBase]: 259/527 cut-off events. [2024-06-27 20:41:46,951 INFO L125 PetriNetUnfolderBase]: For 13535/13535 co-relation queries the response was YES. [2024-06-27 20:41:46,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2686 conditions, 527 events. 259/527 cut-off events. For 13535/13535 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2518 event pairs, 39 based on Foata normal form. 13/537 useless extension candidates. Maximal degree in co-relation 2626. Up to 315 conditions per place. [2024-06-27 20:41:46,955 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 75 selfloop transitions, 39 changer transitions 9/127 dead transitions. [2024-06-27 20:41:46,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 127 transitions, 1322 flow [2024-06-27 20:41:46,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:41:46,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:41:46,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 152 transitions. [2024-06-27 20:41:46,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-27 20:41:46,957 INFO L175 Difference]: Start difference. First operand has 133 places, 109 transitions, 966 flow. Second operand 11 states and 152 transitions. [2024-06-27 20:41:46,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 127 transitions, 1322 flow [2024-06-27 20:41:46,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 127 transitions, 1229 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-27 20:41:46,974 INFO L231 Difference]: Finished difference. Result has 136 places, 107 transitions, 961 flow [2024-06-27 20:41:46,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=873, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=961, PETRI_PLACES=136, PETRI_TRANSITIONS=107} [2024-06-27 20:41:46,975 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 105 predicate places. [2024-06-27 20:41:46,975 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 107 transitions, 961 flow [2024-06-27 20:41:46,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:46,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:46,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:46,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 20:41:46,975 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)] === [2024-06-27 20:41:46,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:46,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1912866148, now seen corresponding path program 3 times [2024-06-27 20:41:46,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:46,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378989769] [2024-06-27 20:41:46,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:46,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:46,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:47,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:47,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:47,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378989769] [2024-06-27 20:41:47,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378989769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:47,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:47,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:41:47,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405502272] [2024-06-27 20:41:47,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:47,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:41:47,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:47,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:41:47,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:41:48,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:48,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 107 transitions, 961 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:48,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:48,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:48,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:48,440 INFO L124 PetriNetUnfolderBase]: 239/485 cut-off events. [2024-06-27 20:41:48,441 INFO L125 PetriNetUnfolderBase]: For 9662/9662 co-relation queries the response was YES. [2024-06-27 20:41:48,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2555 conditions, 485 events. 239/485 cut-off events. For 9662/9662 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2291 event pairs, 35 based on Foata normal form. 2/484 useless extension candidates. Maximal degree in co-relation 2494. Up to 308 conditions per place. [2024-06-27 20:41:48,443 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 71 selfloop transitions, 45 changer transitions 0/120 dead transitions. [2024-06-27 20:41:48,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 120 transitions, 1235 flow [2024-06-27 20:41:48,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:41:48,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:41:48,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 156 transitions. [2024-06-27 20:41:48,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-27 20:41:48,445 INFO L175 Difference]: Start difference. First operand has 136 places, 107 transitions, 961 flow. Second operand 12 states and 156 transitions. [2024-06-27 20:41:48,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 120 transitions, 1235 flow [2024-06-27 20:41:48,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 120 transitions, 1140 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-27 20:41:48,463 INFO L231 Difference]: Finished difference. Result has 137 places, 108 transitions, 980 flow [2024-06-27 20:41:48,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=866, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=980, PETRI_PLACES=137, PETRI_TRANSITIONS=108} [2024-06-27 20:41:48,463 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 106 predicate places. [2024-06-27 20:41:48,464 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 108 transitions, 980 flow [2024-06-27 20:41:48,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:48,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:48,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:48,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 20:41:48,464 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)] === [2024-06-27 20:41:48,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:48,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1588125028, now seen corresponding path program 4 times [2024-06-27 20:41:48,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:48,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484565765] [2024-06-27 20:41:48,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:48,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:48,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:49,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:49,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:49,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484565765] [2024-06-27 20:41:49,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484565765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:49,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:49,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:41:49,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383737216] [2024-06-27 20:41:49,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:49,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:41:49,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:49,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:41:49,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:41:49,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:49,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 108 transitions, 980 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:49,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:49,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:49,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:49,521 INFO L124 PetriNetUnfolderBase]: 262/536 cut-off events. [2024-06-27 20:41:49,522 INFO L125 PetriNetUnfolderBase]: For 15092/15092 co-relation queries the response was YES. [2024-06-27 20:41:49,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2793 conditions, 536 events. 262/536 cut-off events. For 15092/15092 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2578 event pairs, 41 based on Foata normal form. 13/546 useless extension candidates. Maximal degree in co-relation 2732. Up to 327 conditions per place. [2024-06-27 20:41:49,525 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 75 selfloop transitions, 37 changer transitions 10/126 dead transitions. [2024-06-27 20:41:49,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 126 transitions, 1346 flow [2024-06-27 20:41:49,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:41:49,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:41:49,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 155 transitions. [2024-06-27 20:41:49,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-27 20:41:49,531 INFO L175 Difference]: Start difference. First operand has 137 places, 108 transitions, 980 flow. Second operand 11 states and 155 transitions. [2024-06-27 20:41:49,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 126 transitions, 1346 flow [2024-06-27 20:41:49,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 126 transitions, 1242 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-27 20:41:49,549 INFO L231 Difference]: Finished difference. Result has 139 places, 105 transitions, 955 flow [2024-06-27 20:41:49,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=878, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=955, PETRI_PLACES=139, PETRI_TRANSITIONS=105} [2024-06-27 20:41:49,550 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 108 predicate places. [2024-06-27 20:41:49,550 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 105 transitions, 955 flow [2024-06-27 20:41:49,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:49,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:49,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:49,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 20:41:49,551 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)] === [2024-06-27 20:41:49,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:49,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1913252098, now seen corresponding path program 5 times [2024-06-27 20:41:49,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:49,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638735687] [2024-06-27 20:41:49,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:49,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:49,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:50,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:50,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:50,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638735687] [2024-06-27 20:41:50,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638735687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:50,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:50,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:41:50,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283146776] [2024-06-27 20:41:50,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:50,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:41:50,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:50,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:41:50,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:41:50,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:50,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 105 transitions, 955 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:50,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:50,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:50,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:50,605 INFO L124 PetriNetUnfolderBase]: 233/481 cut-off events. [2024-06-27 20:41:50,606 INFO L125 PetriNetUnfolderBase]: For 9051/9051 co-relation queries the response was YES. [2024-06-27 20:41:50,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2470 conditions, 481 events. 233/481 cut-off events. For 9051/9051 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2287 event pairs, 34 based on Foata normal form. 2/480 useless extension candidates. Maximal degree in co-relation 2407. Up to 287 conditions per place. [2024-06-27 20:41:50,608 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 69 selfloop transitions, 45 changer transitions 0/118 dead transitions. [2024-06-27 20:41:50,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 118 transitions, 1211 flow [2024-06-27 20:41:50,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:41:50,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:41:50,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 156 transitions. [2024-06-27 20:41:50,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-27 20:41:50,610 INFO L175 Difference]: Start difference. First operand has 139 places, 105 transitions, 955 flow. Second operand 12 states and 156 transitions. [2024-06-27 20:41:50,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 118 transitions, 1211 flow [2024-06-27 20:41:50,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 118 transitions, 1109 flow, removed 9 selfloop flow, removed 13 redundant places. [2024-06-27 20:41:50,628 INFO L231 Difference]: Finished difference. Result has 138 places, 105 transitions, 947 flow [2024-06-27 20:41:50,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=947, PETRI_PLACES=138, PETRI_TRANSITIONS=105} [2024-06-27 20:41:50,630 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 107 predicate places. [2024-06-27 20:41:50,630 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 105 transitions, 947 flow [2024-06-27 20:41:50,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:50,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:50,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:50,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 20:41:50,631 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)] === [2024-06-27 20:41:50,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:50,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1761954002, now seen corresponding path program 1 times [2024-06-27 20:41:50,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:50,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517191018] [2024-06-27 20:41:50,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:50,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:50,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:51,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:51,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:51,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517191018] [2024-06-27 20:41:51,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517191018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:51,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:51,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:41:51,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187278497] [2024-06-27 20:41:51,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:51,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:41:51,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:51,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:41:51,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:41:51,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:51,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 105 transitions, 947 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:51,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:51,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:51,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:51,647 INFO L124 PetriNetUnfolderBase]: 237/485 cut-off events. [2024-06-27 20:41:51,648 INFO L125 PetriNetUnfolderBase]: For 9047/9047 co-relation queries the response was YES. [2024-06-27 20:41:51,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2471 conditions, 485 events. 237/485 cut-off events. For 9047/9047 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2302 event pairs, 21 based on Foata normal form. 2/482 useless extension candidates. Maximal degree in co-relation 2410. Up to 379 conditions per place. [2024-06-27 20:41:51,652 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 103 selfloop transitions, 11 changer transitions 0/118 dead transitions. [2024-06-27 20:41:51,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 118 transitions, 1211 flow [2024-06-27 20:41:51,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:41:51,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:41:51,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 103 transitions. [2024-06-27 20:41:51,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40234375 [2024-06-27 20:41:51,653 INFO L175 Difference]: Start difference. First operand has 138 places, 105 transitions, 947 flow. Second operand 8 states and 103 transitions. [2024-06-27 20:41:51,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 118 transitions, 1211 flow [2024-06-27 20:41:51,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 118 transitions, 1091 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-06-27 20:41:51,677 INFO L231 Difference]: Finished difference. Result has 135 places, 106 transitions, 861 flow [2024-06-27 20:41:51,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=861, PETRI_PLACES=135, PETRI_TRANSITIONS=106} [2024-06-27 20:41:51,677 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 104 predicate places. [2024-06-27 20:41:51,677 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 106 transitions, 861 flow [2024-06-27 20:41:51,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:51,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:51,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:51,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 20:41:51,678 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)] === [2024-06-27 20:41:51,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:51,679 INFO L85 PathProgramCache]: Analyzing trace with hash -645723080, now seen corresponding path program 2 times [2024-06-27 20:41:51,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:51,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813961403] [2024-06-27 20:41:51,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:51,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:51,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:52,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:52,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:52,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813961403] [2024-06-27 20:41:52,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813961403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:52,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:52,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:41:52,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993426290] [2024-06-27 20:41:52,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:52,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:41:52,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:52,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:41:52,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:41:52,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:52,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 106 transitions, 861 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:52,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:52,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:52,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:52,781 INFO L124 PetriNetUnfolderBase]: 241/495 cut-off events. [2024-06-27 20:41:52,781 INFO L125 PetriNetUnfolderBase]: For 9195/9195 co-relation queries the response was YES. [2024-06-27 20:41:52,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2379 conditions, 495 events. 241/495 cut-off events. For 9195/9195 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2374 event pairs, 37 based on Foata normal form. 2/492 useless extension candidates. Maximal degree in co-relation 2318. Up to 247 conditions per place. [2024-06-27 20:41:52,784 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 86 selfloop transitions, 29 changer transitions 1/120 dead transitions. [2024-06-27 20:41:52,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 120 transitions, 1210 flow [2024-06-27 20:41:52,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:41:52,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:41:52,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 111 transitions. [2024-06-27 20:41:52,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43359375 [2024-06-27 20:41:52,791 INFO L175 Difference]: Start difference. First operand has 135 places, 106 transitions, 861 flow. Second operand 8 states and 111 transitions. [2024-06-27 20:41:52,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 120 transitions, 1210 flow [2024-06-27 20:41:52,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 120 transitions, 1186 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 20:41:52,809 INFO L231 Difference]: Finished difference. Result has 137 places, 107 transitions, 907 flow [2024-06-27 20:41:52,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=837, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=907, PETRI_PLACES=137, PETRI_TRANSITIONS=107} [2024-06-27 20:41:52,810 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 106 predicate places. [2024-06-27 20:41:52,810 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 107 transitions, 907 flow [2024-06-27 20:41:52,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:52,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:52,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:52,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 20:41:52,811 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)] === [2024-06-27 20:41:52,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:52,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1503957798, now seen corresponding path program 3 times [2024-06-27 20:41:52,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:52,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180021831] [2024-06-27 20:41:52,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:52,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:52,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:53,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:53,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:53,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180021831] [2024-06-27 20:41:53,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180021831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:53,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:53,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:41:53,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333892382] [2024-06-27 20:41:53,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:53,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:41:53,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:53,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:41:53,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:41:53,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:53,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 107 transitions, 907 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:53,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:53,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:53,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:53,736 INFO L124 PetriNetUnfolderBase]: 269/549 cut-off events. [2024-06-27 20:41:53,737 INFO L125 PetriNetUnfolderBase]: For 11154/11154 co-relation queries the response was YES. [2024-06-27 20:41:53,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2727 conditions, 549 events. 269/549 cut-off events. For 11154/11154 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2714 event pairs, 40 based on Foata normal form. 2/548 useless extension candidates. Maximal degree in co-relation 2665. Up to 452 conditions per place. [2024-06-27 20:41:53,740 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 106 selfloop transitions, 20 changer transitions 0/130 dead transitions. [2024-06-27 20:41:53,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 130 transitions, 1355 flow [2024-06-27 20:41:53,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:41:53,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:41:53,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 128 transitions. [2024-06-27 20:41:53,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 20:41:53,741 INFO L175 Difference]: Start difference. First operand has 137 places, 107 transitions, 907 flow. Second operand 10 states and 128 transitions. [2024-06-27 20:41:53,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 130 transitions, 1355 flow [2024-06-27 20:41:53,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 130 transitions, 1292 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 20:41:53,767 INFO L231 Difference]: Finished difference. Result has 146 places, 117 transitions, 1011 flow [2024-06-27 20:41:53,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=859, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1011, PETRI_PLACES=146, PETRI_TRANSITIONS=117} [2024-06-27 20:41:53,768 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 115 predicate places. [2024-06-27 20:41:53,768 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 117 transitions, 1011 flow [2024-06-27 20:41:53,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:53,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:53,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:53,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 20:41:53,769 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)] === [2024-06-27 20:41:53,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:53,769 INFO L85 PathProgramCache]: Analyzing trace with hash 988346158, now seen corresponding path program 4 times [2024-06-27 20:41:53,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:53,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523346258] [2024-06-27 20:41:53,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:53,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:53,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:54,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:54,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:54,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523346258] [2024-06-27 20:41:54,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523346258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:54,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:54,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:41:54,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077367765] [2024-06-27 20:41:54,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:54,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:41:54,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:54,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:41:54,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:41:54,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:54,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 117 transitions, 1011 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:54,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:54,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:54,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:54,660 INFO L124 PetriNetUnfolderBase]: 270/550 cut-off events. [2024-06-27 20:41:54,660 INFO L125 PetriNetUnfolderBase]: For 11904/11904 co-relation queries the response was YES. [2024-06-27 20:41:54,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2688 conditions, 550 events. 270/550 cut-off events. For 11904/11904 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2720 event pairs, 43 based on Foata normal form. 4/549 useless extension candidates. Maximal degree in co-relation 2621. Up to 375 conditions per place. [2024-06-27 20:41:54,663 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 78 selfloop transitions, 45 changer transitions 1/128 dead transitions. [2024-06-27 20:41:54,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 128 transitions, 1303 flow [2024-06-27 20:41:54,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:41:54,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:41:54,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-06-27 20:41:54,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 20:41:54,689 INFO L175 Difference]: Start difference. First operand has 146 places, 117 transitions, 1011 flow. Second operand 8 states and 112 transitions. [2024-06-27 20:41:54,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 128 transitions, 1303 flow [2024-06-27 20:41:54,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 128 transitions, 1270 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-27 20:41:54,713 INFO L231 Difference]: Finished difference. Result has 151 places, 118 transitions, 1086 flow [2024-06-27 20:41:54,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1086, PETRI_PLACES=151, PETRI_TRANSITIONS=118} [2024-06-27 20:41:54,713 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 120 predicate places. [2024-06-27 20:41:54,714 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 118 transitions, 1086 flow [2024-06-27 20:41:54,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:54,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:54,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:54,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 20:41:54,714 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)] === [2024-06-27 20:41:54,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:54,715 INFO L85 PathProgramCache]: Analyzing trace with hash 801662576, now seen corresponding path program 5 times [2024-06-27 20:41:54,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:54,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223973415] [2024-06-27 20:41:54,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:54,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:54,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:55,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:55,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:55,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223973415] [2024-06-27 20:41:55,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223973415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:55,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:55,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:41:55,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381353071] [2024-06-27 20:41:55,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:55,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:41:55,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:55,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:41:55,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:41:55,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:55,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 118 transitions, 1086 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:55,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:55,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:55,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:55,883 INFO L124 PetriNetUnfolderBase]: 279/571 cut-off events. [2024-06-27 20:41:55,883 INFO L125 PetriNetUnfolderBase]: For 11263/11263 co-relation queries the response was YES. [2024-06-27 20:41:55,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2875 conditions, 571 events. 279/571 cut-off events. For 11263/11263 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2865 event pairs, 43 based on Foata normal form. 2/570 useless extension candidates. Maximal degree in co-relation 2806. Up to 419 conditions per place. [2024-06-27 20:41:55,898 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 94 selfloop transitions, 33 changer transitions 2/133 dead transitions. [2024-06-27 20:41:55,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 133 transitions, 1420 flow [2024-06-27 20:41:55,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:41:55,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:41:55,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 120 transitions. [2024-06-27 20:41:55,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 20:41:55,899 INFO L175 Difference]: Start difference. First operand has 151 places, 118 transitions, 1086 flow. Second operand 9 states and 120 transitions. [2024-06-27 20:41:55,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 133 transitions, 1420 flow [2024-06-27 20:41:55,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 133 transitions, 1323 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 20:41:55,928 INFO L231 Difference]: Finished difference. Result has 155 places, 121 transitions, 1103 flow [2024-06-27 20:41:55,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=997, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1103, PETRI_PLACES=155, PETRI_TRANSITIONS=121} [2024-06-27 20:41:55,928 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 124 predicate places. [2024-06-27 20:41:55,929 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 121 transitions, 1103 flow [2024-06-27 20:41:55,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:55,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:55,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:55,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 20:41:55,929 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)] === [2024-06-27 20:41:55,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:55,930 INFO L85 PathProgramCache]: Analyzing trace with hash 662201364, now seen corresponding path program 6 times [2024-06-27 20:41:55,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:55,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907125838] [2024-06-27 20:41:55,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:55,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:55,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:56,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:56,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:56,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907125838] [2024-06-27 20:41:56,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907125838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:56,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:56,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:41:56,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769208227] [2024-06-27 20:41:56,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:56,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:41:56,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:56,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:41:56,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:41:56,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:56,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 121 transitions, 1103 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:56,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:56,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:56,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:56,986 INFO L124 PetriNetUnfolderBase]: 288/590 cut-off events. [2024-06-27 20:41:56,987 INFO L125 PetriNetUnfolderBase]: For 11366/11366 co-relation queries the response was YES. [2024-06-27 20:41:56,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2938 conditions, 590 events. 288/590 cut-off events. For 11366/11366 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2980 event pairs, 50 based on Foata normal form. 2/589 useless extension candidates. Maximal degree in co-relation 2867. Up to 438 conditions per place. [2024-06-27 20:41:56,990 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 96 selfloop transitions, 34 changer transitions 0/134 dead transitions. [2024-06-27 20:41:56,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 134 transitions, 1415 flow [2024-06-27 20:41:56,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:41:56,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:41:56,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 122 transitions. [2024-06-27 20:41:56,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236111111111111 [2024-06-27 20:41:56,991 INFO L175 Difference]: Start difference. First operand has 155 places, 121 transitions, 1103 flow. Second operand 9 states and 122 transitions. [2024-06-27 20:41:56,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 134 transitions, 1415 flow [2024-06-27 20:41:57,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 134 transitions, 1380 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 20:41:57,024 INFO L231 Difference]: Finished difference. Result has 162 places, 124 transitions, 1180 flow [2024-06-27 20:41:57,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1068, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1180, PETRI_PLACES=162, PETRI_TRANSITIONS=124} [2024-06-27 20:41:57,025 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 131 predicate places. [2024-06-27 20:41:57,025 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 124 transitions, 1180 flow [2024-06-27 20:41:57,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:57,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:57,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:57,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 20:41:57,026 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)] === [2024-06-27 20:41:57,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:57,026 INFO L85 PathProgramCache]: Analyzing trace with hash 988353102, now seen corresponding path program 1 times [2024-06-27 20:41:57,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:57,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011503816] [2024-06-27 20:41:57,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:57,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:57,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:57,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:57,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:57,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011503816] [2024-06-27 20:41:57,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011503816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:57,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:57,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:41:57,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072596448] [2024-06-27 20:41:57,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:57,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:41:57,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:57,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:41:57,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:41:57,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:57,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 124 transitions, 1180 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:57,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:57,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:57,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:58,144 INFO L124 PetriNetUnfolderBase]: 291/595 cut-off events. [2024-06-27 20:41:58,145 INFO L125 PetriNetUnfolderBase]: For 12084/12084 co-relation queries the response was YES. [2024-06-27 20:41:58,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3039 conditions, 595 events. 291/595 cut-off events. For 12084/12084 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3010 event pairs, 46 based on Foata normal form. 1/591 useless extension candidates. Maximal degree in co-relation 2966. Up to 440 conditions per place. [2024-06-27 20:41:58,149 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 84 selfloop transitions, 47 changer transitions 0/135 dead transitions. [2024-06-27 20:41:58,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 135 transitions, 1504 flow [2024-06-27 20:41:58,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:41:58,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:41:58,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 127 transitions. [2024-06-27 20:41:58,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409722222222222 [2024-06-27 20:41:58,150 INFO L175 Difference]: Start difference. First operand has 162 places, 124 transitions, 1180 flow. Second operand 9 states and 127 transitions. [2024-06-27 20:41:58,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 135 transitions, 1504 flow [2024-06-27 20:41:58,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 135 transitions, 1428 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 20:41:58,178 INFO L231 Difference]: Finished difference. Result has 166 places, 126 transitions, 1249 flow [2024-06-27 20:41:58,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1104, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1249, PETRI_PLACES=166, PETRI_TRANSITIONS=126} [2024-06-27 20:41:58,179 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 135 predicate places. [2024-06-27 20:41:58,179 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 126 transitions, 1249 flow [2024-06-27 20:41:58,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:58,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:58,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:58,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 20:41:58,180 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)] === [2024-06-27 20:41:58,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:58,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1368791272, now seen corresponding path program 2 times [2024-06-27 20:41:58,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:58,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660239643] [2024-06-27 20:41:58,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:58,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:58,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:41:58,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:41:58,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:41:58,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660239643] [2024-06-27 20:41:58,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660239643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:41:58,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:41:58,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:41:58,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72155882] [2024-06-27 20:41:58,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:41:58,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:41:58,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:41:58,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:41:58,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:41:59,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:41:59,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 126 transitions, 1249 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:59,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:41:59,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:41:59,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:41:59,249 INFO L124 PetriNetUnfolderBase]: 294/602 cut-off events. [2024-06-27 20:41:59,249 INFO L125 PetriNetUnfolderBase]: For 12619/12619 co-relation queries the response was YES. [2024-06-27 20:41:59,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3139 conditions, 602 events. 294/602 cut-off events. For 12619/12619 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3054 event pairs, 46 based on Foata normal form. 1/598 useless extension candidates. Maximal degree in co-relation 3065. Up to 404 conditions per place. [2024-06-27 20:41:59,253 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 78 selfloop transitions, 56 changer transitions 0/138 dead transitions. [2024-06-27 20:41:59,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 138 transitions, 1585 flow [2024-06-27 20:41:59,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:41:59,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:41:59,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 138 transitions. [2024-06-27 20:41:59,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-27 20:41:59,254 INFO L175 Difference]: Start difference. First operand has 166 places, 126 transitions, 1249 flow. Second operand 10 states and 138 transitions. [2024-06-27 20:41:59,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 138 transitions, 1585 flow [2024-06-27 20:41:59,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 138 transitions, 1451 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-27 20:41:59,288 INFO L231 Difference]: Finished difference. Result has 169 places, 128 transitions, 1278 flow [2024-06-27 20:41:59,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1119, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1278, PETRI_PLACES=169, PETRI_TRANSITIONS=128} [2024-06-27 20:41:59,289 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 138 predicate places. [2024-06-27 20:41:59,289 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 128 transitions, 1278 flow [2024-06-27 20:41:59,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:41:59,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:41:59,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:41:59,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 20:41:59,290 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)] === [2024-06-27 20:41:59,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:41:59,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1224980612, now seen corresponding path program 7 times [2024-06-27 20:41:59,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:41:59,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083133340] [2024-06-27 20:41:59,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:41:59,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:41:59,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:00,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:00,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:00,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083133340] [2024-06-27 20:42:00,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083133340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:00,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:00,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:42:00,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896995571] [2024-06-27 20:42:00,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:00,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:42:00,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:00,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:42:00,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:42:00,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:00,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 128 transitions, 1278 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:00,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:00,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:00,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:00,446 INFO L124 PetriNetUnfolderBase]: 305/625 cut-off events. [2024-06-27 20:42:00,446 INFO L125 PetriNetUnfolderBase]: For 15355/15355 co-relation queries the response was YES. [2024-06-27 20:42:00,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3310 conditions, 625 events. 305/625 cut-off events. For 15355/15355 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3184 event pairs, 53 based on Foata normal form. 2/624 useless extension candidates. Maximal degree in co-relation 3235. Up to 458 conditions per place. [2024-06-27 20:42:00,449 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 105 selfloop transitions, 32 changer transitions 0/141 dead transitions. [2024-06-27 20:42:00,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 141 transitions, 1686 flow [2024-06-27 20:42:00,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:42:00,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:42:00,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 124 transitions. [2024-06-27 20:42:00,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-27 20:42:00,461 INFO L175 Difference]: Start difference. First operand has 169 places, 128 transitions, 1278 flow. Second operand 9 states and 124 transitions. [2024-06-27 20:42:00,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 141 transitions, 1686 flow [2024-06-27 20:42:00,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 141 transitions, 1543 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-27 20:42:00,501 INFO L231 Difference]: Finished difference. Result has 170 places, 130 transitions, 1235 flow [2024-06-27 20:42:00,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1135, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1235, PETRI_PLACES=170, PETRI_TRANSITIONS=130} [2024-06-27 20:42:00,501 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 139 predicate places. [2024-06-27 20:42:00,502 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 130 transitions, 1235 flow [2024-06-27 20:42:00,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:00,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:00,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:00,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 20:42:00,502 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)] === [2024-06-27 20:42:00,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:00,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1647288708, now seen corresponding path program 8 times [2024-06-27 20:42:00,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:00,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99766287] [2024-06-27 20:42:00,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:00,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:01,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:01,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:01,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99766287] [2024-06-27 20:42:01,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99766287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:01,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:01,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:42:01,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772903691] [2024-06-27 20:42:01,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:01,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:42:01,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:01,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:42:01,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:42:01,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:01,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 130 transitions, 1235 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:01,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:01,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:01,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:01,580 INFO L124 PetriNetUnfolderBase]: 310/638 cut-off events. [2024-06-27 20:42:01,580 INFO L125 PetriNetUnfolderBase]: For 16098/16098 co-relation queries the response was YES. [2024-06-27 20:42:01,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3320 conditions, 638 events. 310/638 cut-off events. For 16098/16098 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3299 event pairs, 55 based on Foata normal form. 2/637 useless extension candidates. Maximal degree in co-relation 3244. Up to 493 conditions per place. [2024-06-27 20:42:01,584 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 106 selfloop transitions, 31 changer transitions 0/141 dead transitions. [2024-06-27 20:42:01,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 141 transitions, 1556 flow [2024-06-27 20:42:01,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:42:01,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:42:01,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 120 transitions. [2024-06-27 20:42:01,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 20:42:01,594 INFO L175 Difference]: Start difference. First operand has 170 places, 130 transitions, 1235 flow. Second operand 9 states and 120 transitions. [2024-06-27 20:42:01,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 141 transitions, 1556 flow [2024-06-27 20:42:01,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 141 transitions, 1459 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-27 20:42:01,637 INFO L231 Difference]: Finished difference. Result has 171 places, 132 transitions, 1233 flow [2024-06-27 20:42:01,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1141, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1233, PETRI_PLACES=171, PETRI_TRANSITIONS=132} [2024-06-27 20:42:01,637 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 140 predicate places. [2024-06-27 20:42:01,637 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 132 transitions, 1233 flow [2024-06-27 20:42:01,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:01,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:01,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:01,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 20:42:01,638 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)] === [2024-06-27 20:42:01,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:01,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1978647864, now seen corresponding path program 9 times [2024-06-27 20:42:01,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:01,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138187094] [2024-06-27 20:42:01,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:01,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:01,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:02,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:02,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:02,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138187094] [2024-06-27 20:42:02,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138187094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:02,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:02,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:42:02,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650058888] [2024-06-27 20:42:02,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:02,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:42:02,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:02,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:42:02,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:42:02,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:02,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 132 transitions, 1233 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:02,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:02,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:02,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:02,701 INFO L124 PetriNetUnfolderBase]: 314/646 cut-off events. [2024-06-27 20:42:02,701 INFO L125 PetriNetUnfolderBase]: For 16652/16652 co-relation queries the response was YES. [2024-06-27 20:42:02,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3369 conditions, 646 events. 314/646 cut-off events. For 16652/16652 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3348 event pairs, 55 based on Foata normal form. 2/645 useless extension candidates. Maximal degree in co-relation 3293. Up to 501 conditions per place. [2024-06-27 20:42:02,705 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 104 selfloop transitions, 35 changer transitions 0/143 dead transitions. [2024-06-27 20:42:02,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 143 transitions, 1550 flow [2024-06-27 20:42:02,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:42:02,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:42:02,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 132 transitions. [2024-06-27 20:42:02,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-27 20:42:02,722 INFO L175 Difference]: Start difference. First operand has 171 places, 132 transitions, 1233 flow. Second operand 10 states and 132 transitions. [2024-06-27 20:42:02,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 143 transitions, 1550 flow [2024-06-27 20:42:02,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 143 transitions, 1482 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 20:42:02,764 INFO L231 Difference]: Finished difference. Result has 175 places, 133 transitions, 1258 flow [2024-06-27 20:42:02,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1165, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1258, PETRI_PLACES=175, PETRI_TRANSITIONS=133} [2024-06-27 20:42:02,764 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 144 predicate places. [2024-06-27 20:42:02,764 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 133 transitions, 1258 flow [2024-06-27 20:42:02,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:02,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:02,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:02,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 20:42:02,765 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)] === [2024-06-27 20:42:02,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:02,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1641032598, now seen corresponding path program 10 times [2024-06-27 20:42:02,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:02,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133916872] [2024-06-27 20:42:02,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:02,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:02,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:03,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:03,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:03,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133916872] [2024-06-27 20:42:03,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133916872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:03,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:03,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:42:03,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120636890] [2024-06-27 20:42:03,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:03,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:42:03,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:03,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:42:03,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:42:03,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:03,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 133 transitions, 1258 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:03,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:03,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:03,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:03,753 INFO L124 PetriNetUnfolderBase]: 311/641 cut-off events. [2024-06-27 20:42:03,753 INFO L125 PetriNetUnfolderBase]: For 15448/15448 co-relation queries the response was YES. [2024-06-27 20:42:03,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3275 conditions, 641 events. 311/641 cut-off events. For 15448/15448 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3315 event pairs, 54 based on Foata normal form. 2/640 useless extension candidates. Maximal degree in co-relation 3198. Up to 496 conditions per place. [2024-06-27 20:42:03,757 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 108 selfloop transitions, 30 changer transitions 0/142 dead transitions. [2024-06-27 20:42:03,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 142 transitions, 1554 flow [2024-06-27 20:42:03,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:42:03,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:42:03,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 121 transitions. [2024-06-27 20:42:03,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4201388888888889 [2024-06-27 20:42:03,763 INFO L175 Difference]: Start difference. First operand has 175 places, 133 transitions, 1258 flow. Second operand 9 states and 121 transitions. [2024-06-27 20:42:03,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 142 transitions, 1554 flow [2024-06-27 20:42:03,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 142 transitions, 1461 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-27 20:42:03,801 INFO L231 Difference]: Finished difference. Result has 176 places, 133 transitions, 1229 flow [2024-06-27 20:42:03,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1165, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1229, PETRI_PLACES=176, PETRI_TRANSITIONS=133} [2024-06-27 20:42:03,801 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 145 predicate places. [2024-06-27 20:42:03,801 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 133 transitions, 1229 flow [2024-06-27 20:42:03,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:03,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:03,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:03,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 20:42:03,802 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)] === [2024-06-27 20:42:03,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:03,802 INFO L85 PathProgramCache]: Analyzing trace with hash -830701480, now seen corresponding path program 3 times [2024-06-27 20:42:03,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:03,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847104781] [2024-06-27 20:42:03,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:03,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:03,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:04,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:04,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:04,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847104781] [2024-06-27 20:42:04,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847104781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:04,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:04,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:42:04,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226371306] [2024-06-27 20:42:04,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:04,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:42:04,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:04,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:42:04,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:42:04,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:04,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 133 transitions, 1229 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:04,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:04,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:04,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:05,124 INFO L124 PetriNetUnfolderBase]: 314/648 cut-off events. [2024-06-27 20:42:05,124 INFO L125 PetriNetUnfolderBase]: For 15089/15089 co-relation queries the response was YES. [2024-06-27 20:42:05,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3287 conditions, 648 events. 314/648 cut-off events. For 15089/15089 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3362 event pairs, 54 based on Foata normal form. 1/646 useless extension candidates. Maximal degree in co-relation 3209. Up to 472 conditions per place. [2024-06-27 20:42:05,127 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 96 selfloop transitions, 46 changer transitions 0/146 dead transitions. [2024-06-27 20:42:05,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 146 transitions, 1579 flow [2024-06-27 20:42:05,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:42:05,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:42:05,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 157 transitions. [2024-06-27 20:42:05,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4088541666666667 [2024-06-27 20:42:05,129 INFO L175 Difference]: Start difference. First operand has 176 places, 133 transitions, 1229 flow. Second operand 12 states and 157 transitions. [2024-06-27 20:42:05,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 146 transitions, 1579 flow [2024-06-27 20:42:05,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 146 transitions, 1495 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-27 20:42:05,172 INFO L231 Difference]: Finished difference. Result has 179 places, 135 transitions, 1289 flow [2024-06-27 20:42:05,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1289, PETRI_PLACES=179, PETRI_TRANSITIONS=135} [2024-06-27 20:42:05,172 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 148 predicate places. [2024-06-27 20:42:05,172 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 135 transitions, 1289 flow [2024-06-27 20:42:05,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:05,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:05,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:05,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 20:42:05,173 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)] === [2024-06-27 20:42:05,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:05,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1987225688, now seen corresponding path program 4 times [2024-06-27 20:42:05,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:05,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233679574] [2024-06-27 20:42:05,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:05,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:05,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:06,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:06,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:06,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233679574] [2024-06-27 20:42:06,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233679574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:06,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:06,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:42:06,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775340248] [2024-06-27 20:42:06,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:06,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:42:06,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:06,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:42:06,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:42:06,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:06,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 135 transitions, 1289 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:06,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:06,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:06,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:06,606 INFO L124 PetriNetUnfolderBase]: 317/653 cut-off events. [2024-06-27 20:42:06,606 INFO L125 PetriNetUnfolderBase]: For 15929/15929 co-relation queries the response was YES. [2024-06-27 20:42:06,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3378 conditions, 653 events. 317/653 cut-off events. For 15929/15929 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3416 event pairs, 48 based on Foata normal form. 1/649 useless extension candidates. Maximal degree in co-relation 3300. Up to 454 conditions per place. [2024-06-27 20:42:06,610 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 92 selfloop transitions, 52 changer transitions 0/148 dead transitions. [2024-06-27 20:42:06,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 148 transitions, 1651 flow [2024-06-27 20:42:06,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:42:06,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:42:06,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 148 transitions. [2024-06-27 20:42:06,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-27 20:42:06,611 INFO L175 Difference]: Start difference. First operand has 179 places, 135 transitions, 1289 flow. Second operand 11 states and 148 transitions. [2024-06-27 20:42:06,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 148 transitions, 1651 flow [2024-06-27 20:42:06,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 148 transitions, 1525 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-06-27 20:42:06,656 INFO L231 Difference]: Finished difference. Result has 180 places, 137 transitions, 1322 flow [2024-06-27 20:42:06,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1163, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1322, PETRI_PLACES=180, PETRI_TRANSITIONS=137} [2024-06-27 20:42:06,656 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 149 predicate places. [2024-06-27 20:42:06,657 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 137 transitions, 1322 flow [2024-06-27 20:42:06,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:06,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:06,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:06,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 20:42:06,657 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)] === [2024-06-27 20:42:06,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:06,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1410809734, now seen corresponding path program 5 times [2024-06-27 20:42:06,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:06,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142894025] [2024-06-27 20:42:06,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:06,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:06,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:07,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:07,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:07,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142894025] [2024-06-27 20:42:07,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142894025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:07,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:07,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:42:07,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297112915] [2024-06-27 20:42:07,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:07,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:42:07,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:07,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:42:07,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:42:07,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:07,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 137 transitions, 1322 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:07,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:07,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:07,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:07,666 INFO L124 PetriNetUnfolderBase]: 315/652 cut-off events. [2024-06-27 20:42:07,666 INFO L125 PetriNetUnfolderBase]: For 15389/15389 co-relation queries the response was YES. [2024-06-27 20:42:07,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3319 conditions, 652 events. 315/652 cut-off events. For 15389/15389 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3427 event pairs, 54 based on Foata normal form. 1/650 useless extension candidates. Maximal degree in co-relation 3240. Up to 488 conditions per place. [2024-06-27 20:42:07,671 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 109 selfloop transitions, 35 changer transitions 0/148 dead transitions. [2024-06-27 20:42:07,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 148 transitions, 1680 flow [2024-06-27 20:42:07,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:42:07,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:42:07,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 134 transitions. [2024-06-27 20:42:07,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-27 20:42:07,672 INFO L175 Difference]: Start difference. First operand has 180 places, 137 transitions, 1322 flow. Second operand 10 states and 134 transitions. [2024-06-27 20:42:07,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 148 transitions, 1680 flow [2024-06-27 20:42:07,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 148 transitions, 1537 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-27 20:42:07,712 INFO L231 Difference]: Finished difference. Result has 181 places, 139 transitions, 1308 flow [2024-06-27 20:42:07,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1179, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1308, PETRI_PLACES=181, PETRI_TRANSITIONS=139} [2024-06-27 20:42:07,712 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 150 predicate places. [2024-06-27 20:42:07,712 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 139 transitions, 1308 flow [2024-06-27 20:42:07,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:07,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:07,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:07,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 20:42:07,713 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)] === [2024-06-27 20:42:07,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:07,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1396892412, now seen corresponding path program 11 times [2024-06-27 20:42:07,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:07,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639590934] [2024-06-27 20:42:07,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:07,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:07,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:08,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:08,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:08,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639590934] [2024-06-27 20:42:08,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639590934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:08,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:08,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:42:08,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21935780] [2024-06-27 20:42:08,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:08,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:42:08,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:08,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:42:08,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:42:08,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:08,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 139 transitions, 1308 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:08,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:08,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:08,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:08,753 INFO L124 PetriNetUnfolderBase]: 312/645 cut-off events. [2024-06-27 20:42:08,753 INFO L125 PetriNetUnfolderBase]: For 14628/14628 co-relation queries the response was YES. [2024-06-27 20:42:08,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3148 conditions, 645 events. 312/645 cut-off events. For 14628/14628 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3384 event pairs, 43 based on Foata normal form. 2/642 useless extension candidates. Maximal degree in co-relation 3068. Up to 471 conditions per place. [2024-06-27 20:42:08,758 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 104 selfloop transitions, 41 changer transitions 0/149 dead transitions. [2024-06-27 20:42:08,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 149 transitions, 1624 flow [2024-06-27 20:42:08,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:42:08,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:42:08,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-06-27 20:42:08,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 20:42:08,759 INFO L175 Difference]: Start difference. First operand has 181 places, 139 transitions, 1308 flow. Second operand 8 states and 112 transitions. [2024-06-27 20:42:08,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 149 transitions, 1624 flow [2024-06-27 20:42:08,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 149 transitions, 1507 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-27 20:42:08,805 INFO L231 Difference]: Finished difference. Result has 181 places, 139 transitions, 1279 flow [2024-06-27 20:42:08,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1191, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1279, PETRI_PLACES=181, PETRI_TRANSITIONS=139} [2024-06-27 20:42:08,806 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 150 predicate places. [2024-06-27 20:42:08,806 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 139 transitions, 1279 flow [2024-06-27 20:42:08,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:08,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:08,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:08,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 20:42:08,806 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)] === [2024-06-27 20:42:08,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:08,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1540383199, now seen corresponding path program 1 times [2024-06-27 20:42:08,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:08,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925528272] [2024-06-27 20:42:08,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:08,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:08,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:09,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:09,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:09,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925528272] [2024-06-27 20:42:09,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925528272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:09,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:09,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:42:09,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277935138] [2024-06-27 20:42:09,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:09,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:42:09,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:09,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:42:09,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:42:09,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:09,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 139 transitions, 1279 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:09,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:09,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:09,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:09,800 INFO L124 PetriNetUnfolderBase]: 316/653 cut-off events. [2024-06-27 20:42:09,800 INFO L125 PetriNetUnfolderBase]: For 14871/14871 co-relation queries the response was YES. [2024-06-27 20:42:09,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3165 conditions, 653 events. 316/653 cut-off events. For 14871/14871 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3430 event pairs, 30 based on Foata normal form. 2/650 useless extension candidates. Maximal degree in co-relation 3084. Up to 521 conditions per place. [2024-06-27 20:42:09,804 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 136 selfloop transitions, 14 changer transitions 0/154 dead transitions. [2024-06-27 20:42:09,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 154 transitions, 1619 flow [2024-06-27 20:42:09,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:42:09,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:42:09,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2024-06-27 20:42:09,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-27 20:42:09,806 INFO L175 Difference]: Start difference. First operand has 181 places, 139 transitions, 1279 flow. Second operand 9 states and 114 transitions. [2024-06-27 20:42:09,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 154 transitions, 1619 flow [2024-06-27 20:42:09,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 154 transitions, 1437 flow, removed 9 selfloop flow, removed 12 redundant places. [2024-06-27 20:42:09,851 INFO L231 Difference]: Finished difference. Result has 178 places, 140 transitions, 1137 flow [2024-06-27 20:42:09,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1097, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1137, PETRI_PLACES=178, PETRI_TRANSITIONS=140} [2024-06-27 20:42:09,852 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 147 predicate places. [2024-06-27 20:42:09,852 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 140 transitions, 1137 flow [2024-06-27 20:42:09,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:09,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:09,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:09,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 20:42:09,852 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)] === [2024-06-27 20:42:09,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:09,853 INFO L85 PathProgramCache]: Analyzing trace with hash 2057496047, now seen corresponding path program 2 times [2024-06-27 20:42:09,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:09,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920384531] [2024-06-27 20:42:09,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:09,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:09,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:10,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:10,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:10,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920384531] [2024-06-27 20:42:10,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920384531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:10,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:10,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:42:10,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237839915] [2024-06-27 20:42:10,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:10,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:42:10,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:10,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:42:10,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:42:10,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:10,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 140 transitions, 1137 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:10,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:10,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:10,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:10,896 INFO L124 PetriNetUnfolderBase]: 320/661 cut-off events. [2024-06-27 20:42:10,896 INFO L125 PetriNetUnfolderBase]: For 14451/14451 co-relation queries the response was YES. [2024-06-27 20:42:10,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2973 conditions, 661 events. 320/661 cut-off events. For 14451/14451 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3487 event pairs, 43 based on Foata normal form. 2/658 useless extension candidates. Maximal degree in co-relation 2896. Up to 237 conditions per place. [2024-06-27 20:42:10,899 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 112 selfloop transitions, 39 changer transitions 0/155 dead transitions. [2024-06-27 20:42:10,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 155 transitions, 1577 flow [2024-06-27 20:42:10,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:42:10,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:42:10,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 124 transitions. [2024-06-27 20:42:10,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-27 20:42:10,901 INFO L175 Difference]: Start difference. First operand has 178 places, 140 transitions, 1137 flow. Second operand 9 states and 124 transitions. [2024-06-27 20:42:10,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 155 transitions, 1577 flow [2024-06-27 20:42:10,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 155 transitions, 1547 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 20:42:10,942 INFO L231 Difference]: Finished difference. Result has 180 places, 141 transitions, 1197 flow [2024-06-27 20:42:10,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1107, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1197, PETRI_PLACES=180, PETRI_TRANSITIONS=141} [2024-06-27 20:42:10,942 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 149 predicate places. [2024-06-27 20:42:10,942 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 141 transitions, 1197 flow [2024-06-27 20:42:10,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:10,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:10,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:10,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 20:42:10,943 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)] === [2024-06-27 20:42:10,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:10,943 INFO L85 PathProgramCache]: Analyzing trace with hash 627455943, now seen corresponding path program 3 times [2024-06-27 20:42:10,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:10,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759149030] [2024-06-27 20:42:10,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:10,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:10,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:11,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:11,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:11,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759149030] [2024-06-27 20:42:11,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759149030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:11,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:11,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:42:11,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707508092] [2024-06-27 20:42:11,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:11,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:42:11,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:11,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:42:11,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:42:11,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:11,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 141 transitions, 1197 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:11,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:11,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:11,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:12,010 INFO L124 PetriNetUnfolderBase]: 331/682 cut-off events. [2024-06-27 20:42:12,010 INFO L125 PetriNetUnfolderBase]: For 17733/17733 co-relation queries the response was YES. [2024-06-27 20:42:12,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3226 conditions, 682 events. 331/682 cut-off events. For 17733/17733 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3607 event pairs, 50 based on Foata normal form. 2/679 useless extension candidates. Maximal degree in co-relation 3148. Up to 436 conditions per place. [2024-06-27 20:42:12,015 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 98 selfloop transitions, 53 changer transitions 0/155 dead transitions. [2024-06-27 20:42:12,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 155 transitions, 1647 flow [2024-06-27 20:42:12,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:42:12,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:42:12,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 127 transitions. [2024-06-27 20:42:12,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409722222222222 [2024-06-27 20:42:12,016 INFO L175 Difference]: Start difference. First operand has 180 places, 141 transitions, 1197 flow. Second operand 9 states and 127 transitions. [2024-06-27 20:42:12,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 155 transitions, 1647 flow [2024-06-27 20:42:12,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 155 transitions, 1579 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 20:42:12,057 INFO L231 Difference]: Finished difference. Result has 183 places, 143 transitions, 1264 flow [2024-06-27 20:42:12,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1135, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1264, PETRI_PLACES=183, PETRI_TRANSITIONS=143} [2024-06-27 20:42:12,058 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 152 predicate places. [2024-06-27 20:42:12,058 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 143 transitions, 1264 flow [2024-06-27 20:42:12,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:12,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:12,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:12,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 20:42:12,059 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)] === [2024-06-27 20:42:12,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:12,059 INFO L85 PathProgramCache]: Analyzing trace with hash 627663333, now seen corresponding path program 4 times [2024-06-27 20:42:12,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:12,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307286750] [2024-06-27 20:42:12,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:12,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:12,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:12,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:12,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:12,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307286750] [2024-06-27 20:42:12,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307286750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:12,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:12,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:42:12,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208058217] [2024-06-27 20:42:12,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:12,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:42:12,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:12,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:42:12,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:42:12,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:12,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 143 transitions, 1264 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:12,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:12,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:12,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:13,125 INFO L124 PetriNetUnfolderBase]: 328/677 cut-off events. [2024-06-27 20:42:13,125 INFO L125 PetriNetUnfolderBase]: For 15955/15955 co-relation queries the response was YES. [2024-06-27 20:42:13,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3163 conditions, 677 events. 328/677 cut-off events. For 15955/15955 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3582 event pairs, 51 based on Foata normal form. 2/674 useless extension candidates. Maximal degree in co-relation 3084. Up to 478 conditions per place. [2024-06-27 20:42:13,130 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 98 selfloop transitions, 51 changer transitions 0/153 dead transitions. [2024-06-27 20:42:13,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 153 transitions, 1588 flow [2024-06-27 20:42:13,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:42:13,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:42:13,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 125 transitions. [2024-06-27 20:42:13,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340277777777778 [2024-06-27 20:42:13,131 INFO L175 Difference]: Start difference. First operand has 183 places, 143 transitions, 1264 flow. Second operand 9 states and 125 transitions. [2024-06-27 20:42:13,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 153 transitions, 1588 flow [2024-06-27 20:42:13,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 153 transitions, 1511 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 20:42:13,172 INFO L231 Difference]: Finished difference. Result has 187 places, 143 transitions, 1293 flow [2024-06-27 20:42:13,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1187, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1293, PETRI_PLACES=187, PETRI_TRANSITIONS=143} [2024-06-27 20:42:13,173 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 156 predicate places. [2024-06-27 20:42:13,173 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 143 transitions, 1293 flow [2024-06-27 20:42:13,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:13,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:13,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:13,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 20:42:13,173 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)] === [2024-06-27 20:42:13,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:13,174 INFO L85 PathProgramCache]: Analyzing trace with hash -2095368179, now seen corresponding path program 5 times [2024-06-27 20:42:13,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:13,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476325625] [2024-06-27 20:42:13,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:13,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:13,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:13,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:13,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:13,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476325625] [2024-06-27 20:42:13,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476325625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:13,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:13,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:42:13,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801376092] [2024-06-27 20:42:13,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:13,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:42:13,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:13,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:42:13,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:42:14,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:14,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 143 transitions, 1293 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:14,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:14,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:14,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:14,251 INFO L124 PetriNetUnfolderBase]: 332/685 cut-off events. [2024-06-27 20:42:14,251 INFO L125 PetriNetUnfolderBase]: For 16480/16480 co-relation queries the response was YES. [2024-06-27 20:42:14,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3259 conditions, 685 events. 332/685 cut-off events. For 16480/16480 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3634 event pairs, 43 based on Foata normal form. 2/682 useless extension candidates. Maximal degree in co-relation 3178. Up to 366 conditions per place. [2024-06-27 20:42:14,256 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 98 selfloop transitions, 54 changer transitions 0/156 dead transitions. [2024-06-27 20:42:14,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 156 transitions, 1636 flow [2024-06-27 20:42:14,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:42:14,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:42:14,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 126 transitions. [2024-06-27 20:42:14,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 20:42:14,257 INFO L175 Difference]: Start difference. First operand has 187 places, 143 transitions, 1293 flow. Second operand 9 states and 126 transitions. [2024-06-27 20:42:14,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 156 transitions, 1636 flow [2024-06-27 20:42:14,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 156 transitions, 1526 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 20:42:14,309 INFO L231 Difference]: Finished difference. Result has 188 places, 144 transitions, 1309 flow [2024-06-27 20:42:14,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1183, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1309, PETRI_PLACES=188, PETRI_TRANSITIONS=144} [2024-06-27 20:42:14,311 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 157 predicate places. [2024-06-27 20:42:14,311 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 144 transitions, 1309 flow [2024-06-27 20:42:14,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:14,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:14,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:14,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 20:42:14,311 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)] === [2024-06-27 20:42:14,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:14,312 INFO L85 PathProgramCache]: Analyzing trace with hash -2089646323, now seen corresponding path program 1 times [2024-06-27 20:42:14,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:14,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82521372] [2024-06-27 20:42:14,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:14,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:14,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:15,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:15,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:15,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82521372] [2024-06-27 20:42:15,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82521372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:15,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:15,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:42:15,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161965561] [2024-06-27 20:42:15,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:15,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:42:15,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:15,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:42:15,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:42:15,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:15,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 144 transitions, 1309 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:15,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:15,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:15,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:15,732 INFO L124 PetriNetUnfolderBase]: 344/717 cut-off events. [2024-06-27 20:42:15,733 INFO L125 PetriNetUnfolderBase]: For 25235/25235 co-relation queries the response was YES. [2024-06-27 20:42:15,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3452 conditions, 717 events. 344/717 cut-off events. For 25235/25235 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3845 event pairs, 56 based on Foata normal form. 8/720 useless extension candidates. Maximal degree in co-relation 3370. Up to 457 conditions per place. [2024-06-27 20:42:15,738 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 93 selfloop transitions, 51 changer transitions 10/158 dead transitions. [2024-06-27 20:42:15,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 158 transitions, 1701 flow [2024-06-27 20:42:15,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:42:15,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:42:15,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 142 transitions. [2024-06-27 20:42:15,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-27 20:42:15,742 INFO L175 Difference]: Start difference. First operand has 188 places, 144 transitions, 1309 flow. Second operand 10 states and 142 transitions. [2024-06-27 20:42:15,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 158 transitions, 1701 flow [2024-06-27 20:42:15,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 158 transitions, 1592 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 20:42:15,798 INFO L231 Difference]: Finished difference. Result has 191 places, 137 transitions, 1252 flow [2024-06-27 20:42:15,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1200, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1252, PETRI_PLACES=191, PETRI_TRANSITIONS=137} [2024-06-27 20:42:15,799 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 160 predicate places. [2024-06-27 20:42:15,799 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 137 transitions, 1252 flow [2024-06-27 20:42:15,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:15,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:15,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:15,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 20:42:15,799 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)] === [2024-06-27 20:42:15,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:15,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1640409193, now seen corresponding path program 2 times [2024-06-27 20:42:15,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:15,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820169077] [2024-06-27 20:42:15,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:15,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:15,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:16,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:16,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:16,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820169077] [2024-06-27 20:42:16,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820169077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:16,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:16,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:42:16,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41440714] [2024-06-27 20:42:16,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:16,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:42:16,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:16,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:42:16,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:42:16,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:16,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 137 transitions, 1252 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:16,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:16,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:16,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:17,093 INFO L124 PetriNetUnfolderBase]: 348/739 cut-off events. [2024-06-27 20:42:17,094 INFO L125 PetriNetUnfolderBase]: For 33414/33414 co-relation queries the response was YES. [2024-06-27 20:42:17,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3985 conditions, 739 events. 348/739 cut-off events. For 33414/33414 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3979 event pairs, 62 based on Foata normal form. 6/742 useless extension candidates. Maximal degree in co-relation 3902. Up to 446 conditions per place. [2024-06-27 20:42:17,099 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 96 selfloop transitions, 54 changer transitions 5/159 dead transitions. [2024-06-27 20:42:17,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 159 transitions, 1802 flow [2024-06-27 20:42:17,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:42:17,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:42:17,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 166 transitions. [2024-06-27 20:42:17,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4322916666666667 [2024-06-27 20:42:17,101 INFO L175 Difference]: Start difference. First operand has 191 places, 137 transitions, 1252 flow. Second operand 12 states and 166 transitions. [2024-06-27 20:42:17,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 159 transitions, 1802 flow [2024-06-27 20:42:17,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 159 transitions, 1651 flow, removed 9 selfloop flow, removed 15 redundant places. [2024-06-27 20:42:17,164 INFO L231 Difference]: Finished difference. Result has 187 places, 136 transitions, 1215 flow [2024-06-27 20:42:17,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1109, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1215, PETRI_PLACES=187, PETRI_TRANSITIONS=136} [2024-06-27 20:42:17,165 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 156 predicate places. [2024-06-27 20:42:17,165 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 136 transitions, 1215 flow [2024-06-27 20:42:17,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:17,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:17,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:17,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 20:42:17,165 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)] === [2024-06-27 20:42:17,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:17,166 INFO L85 PathProgramCache]: Analyzing trace with hash 517144485, now seen corresponding path program 3 times [2024-06-27 20:42:17,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:17,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193711624] [2024-06-27 20:42:17,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:17,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:17,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:18,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:18,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:18,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193711624] [2024-06-27 20:42:18,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193711624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:18,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:18,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:42:18,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284341058] [2024-06-27 20:42:18,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:18,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:42:18,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:18,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:42:18,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:42:18,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:18,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 136 transitions, 1215 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:18,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:18,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:18,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:18,655 INFO L124 PetriNetUnfolderBase]: 326/693 cut-off events. [2024-06-27 20:42:18,655 INFO L125 PetriNetUnfolderBase]: For 24618/24618 co-relation queries the response was YES. [2024-06-27 20:42:18,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3272 conditions, 693 events. 326/693 cut-off events. For 24618/24618 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3695 event pairs, 65 based on Foata normal form. 8/698 useless extension candidates. Maximal degree in co-relation 3192. Up to 490 conditions per place. [2024-06-27 20:42:18,659 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 99 selfloop transitions, 38 changer transitions 9/150 dead transitions. [2024-06-27 20:42:18,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 150 transitions, 1585 flow [2024-06-27 20:42:18,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:42:18,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:42:18,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 148 transitions. [2024-06-27 20:42:18,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-27 20:42:18,660 INFO L175 Difference]: Start difference. First operand has 187 places, 136 transitions, 1215 flow. Second operand 11 states and 148 transitions. [2024-06-27 20:42:18,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 150 transitions, 1585 flow [2024-06-27 20:42:18,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 150 transitions, 1475 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-27 20:42:18,711 INFO L231 Difference]: Finished difference. Result has 186 places, 133 transitions, 1168 flow [2024-06-27 20:42:18,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1105, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1168, PETRI_PLACES=186, PETRI_TRANSITIONS=133} [2024-06-27 20:42:18,711 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 155 predicate places. [2024-06-27 20:42:18,711 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 133 transitions, 1168 flow [2024-06-27 20:42:18,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:18,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:18,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:18,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 20:42:18,712 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)] === [2024-06-27 20:42:18,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:18,712 INFO L85 PathProgramCache]: Analyzing trace with hash 468151969, now seen corresponding path program 6 times [2024-06-27 20:42:18,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:18,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872721022] [2024-06-27 20:42:18,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:18,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:18,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:19,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:19,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:19,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872721022] [2024-06-27 20:42:19,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872721022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:19,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:19,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:42:19,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254378002] [2024-06-27 20:42:19,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:19,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:42:19,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:19,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:42:19,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:42:19,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:19,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 133 transitions, 1168 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:19,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:19,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:19,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:19,826 INFO L124 PetriNetUnfolderBase]: 313/664 cut-off events. [2024-06-27 20:42:19,826 INFO L125 PetriNetUnfolderBase]: For 16910/16910 co-relation queries the response was YES. [2024-06-27 20:42:19,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3086 conditions, 664 events. 313/664 cut-off events. For 16910/16910 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3509 event pairs, 59 based on Foata normal form. 2/663 useless extension candidates. Maximal degree in co-relation 3006. Up to 439 conditions per place. [2024-06-27 20:42:19,831 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 107 selfloop transitions, 36 changer transitions 0/147 dead transitions. [2024-06-27 20:42:19,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 147 transitions, 1597 flow [2024-06-27 20:42:19,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:42:19,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:42:19,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 138 transitions. [2024-06-27 20:42:19,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-27 20:42:19,832 INFO L175 Difference]: Start difference. First operand has 186 places, 133 transitions, 1168 flow. Second operand 10 states and 138 transitions. [2024-06-27 20:42:19,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 147 transitions, 1597 flow [2024-06-27 20:42:19,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 147 transitions, 1509 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-27 20:42:19,881 INFO L231 Difference]: Finished difference. Result has 183 places, 134 transitions, 1171 flow [2024-06-27 20:42:19,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1084, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1171, PETRI_PLACES=183, PETRI_TRANSITIONS=134} [2024-06-27 20:42:19,882 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 152 predicate places. [2024-06-27 20:42:19,882 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 134 transitions, 1171 flow [2024-06-27 20:42:19,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:19,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:19,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:19,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 20:42:19,883 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)] === [2024-06-27 20:42:19,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:19,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1393442703, now seen corresponding path program 7 times [2024-06-27 20:42:19,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:19,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607461065] [2024-06-27 20:42:19,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:19,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:19,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:20,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:20,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:20,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607461065] [2024-06-27 20:42:20,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607461065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:20,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:20,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:42:20,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295381810] [2024-06-27 20:42:20,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:20,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:42:20,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:20,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:42:20,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:42:20,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:20,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 134 transitions, 1171 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:20,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:20,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:20,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:21,076 INFO L124 PetriNetUnfolderBase]: 317/672 cut-off events. [2024-06-27 20:42:21,077 INFO L125 PetriNetUnfolderBase]: For 16436/16436 co-relation queries the response was YES. [2024-06-27 20:42:21,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3107 conditions, 672 events. 317/672 cut-off events. For 16436/16436 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3569 event pairs, 63 based on Foata normal form. 2/671 useless extension candidates. Maximal degree in co-relation 3028. Up to 498 conditions per place. [2024-06-27 20:42:21,081 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 108 selfloop transitions, 34 changer transitions 0/146 dead transitions. [2024-06-27 20:42:21,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 146 transitions, 1492 flow [2024-06-27 20:42:21,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:42:21,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:42:21,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 133 transitions. [2024-06-27 20:42:21,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-27 20:42:21,082 INFO L175 Difference]: Start difference. First operand has 183 places, 134 transitions, 1171 flow. Second operand 10 states and 133 transitions. [2024-06-27 20:42:21,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 146 transitions, 1492 flow [2024-06-27 20:42:21,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 146 transitions, 1371 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-27 20:42:21,128 INFO L231 Difference]: Finished difference. Result has 184 places, 135 transitions, 1137 flow [2024-06-27 20:42:21,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1054, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1137, PETRI_PLACES=184, PETRI_TRANSITIONS=135} [2024-06-27 20:42:21,129 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 153 predicate places. [2024-06-27 20:42:21,129 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 135 transitions, 1137 flow [2024-06-27 20:42:21,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:21,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:21,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:21,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 20:42:21,130 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)] === [2024-06-27 20:42:21,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:21,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1208542535, now seen corresponding path program 8 times [2024-06-27 20:42:21,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:21,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457251486] [2024-06-27 20:42:21,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:21,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:21,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:21,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:21,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:21,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457251486] [2024-06-27 20:42:21,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457251486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:21,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:21,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:42:21,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518653889] [2024-06-27 20:42:21,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:21,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:42:21,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:21,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:42:21,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:42:22,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:22,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 135 transitions, 1137 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:22,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:22,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:22,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:22,381 INFO L124 PetriNetUnfolderBase]: 321/680 cut-off events. [2024-06-27 20:42:22,381 INFO L125 PetriNetUnfolderBase]: For 16948/16948 co-relation queries the response was YES. [2024-06-27 20:42:22,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3049 conditions, 680 events. 321/680 cut-off events. For 16948/16948 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3625 event pairs, 65 based on Foata normal form. 2/679 useless extension candidates. Maximal degree in co-relation 2970. Up to 506 conditions per place. [2024-06-27 20:42:22,385 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 106 selfloop transitions, 38 changer transitions 0/148 dead transitions. [2024-06-27 20:42:22,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 148 transitions, 1462 flow [2024-06-27 20:42:22,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:42:22,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:42:22,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 146 transitions. [2024-06-27 20:42:22,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-06-27 20:42:22,394 INFO L175 Difference]: Start difference. First operand has 184 places, 135 transitions, 1137 flow. Second operand 11 states and 146 transitions. [2024-06-27 20:42:22,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 148 transitions, 1462 flow [2024-06-27 20:42:22,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 148 transitions, 1390 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 20:42:22,468 INFO L231 Difference]: Finished difference. Result has 187 places, 136 transitions, 1158 flow [2024-06-27 20:42:22,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1065, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1158, PETRI_PLACES=187, PETRI_TRANSITIONS=136} [2024-06-27 20:42:22,469 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 156 predicate places. [2024-06-27 20:42:22,469 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 136 transitions, 1158 flow [2024-06-27 20:42:22,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:22,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:22,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:22,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 20:42:22,470 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)] === [2024-06-27 20:42:22,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:22,470 INFO L85 PathProgramCache]: Analyzing trace with hash -131556239, now seen corresponding path program 9 times [2024-06-27 20:42:22,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:22,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421522725] [2024-06-27 20:42:22,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:22,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:22,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:23,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:23,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:23,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421522725] [2024-06-27 20:42:23,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421522725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:23,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:23,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:42:23,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009804088] [2024-06-27 20:42:23,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:23,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:42:23,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:23,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:42:23,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:42:23,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:23,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 136 transitions, 1158 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:23,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:23,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:23,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:23,595 INFO L124 PetriNetUnfolderBase]: 318/675 cut-off events. [2024-06-27 20:42:23,595 INFO L125 PetriNetUnfolderBase]: For 14790/14790 co-relation queries the response was YES. [2024-06-27 20:42:23,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2944 conditions, 675 events. 318/675 cut-off events. For 14790/14790 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3600 event pairs, 64 based on Foata normal form. 2/674 useless extension candidates. Maximal degree in co-relation 2864. Up to 501 conditions per place. [2024-06-27 20:42:23,600 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 110 selfloop transitions, 33 changer transitions 0/147 dead transitions. [2024-06-27 20:42:23,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 147 transitions, 1468 flow [2024-06-27 20:42:23,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:42:23,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:42:23,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 135 transitions. [2024-06-27 20:42:23,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-27 20:42:23,601 INFO L175 Difference]: Start difference. First operand has 187 places, 136 transitions, 1158 flow. Second operand 10 states and 135 transitions. [2024-06-27 20:42:23,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 147 transitions, 1468 flow [2024-06-27 20:42:23,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 147 transitions, 1380 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-27 20:42:23,650 INFO L231 Difference]: Finished difference. Result has 188 places, 136 transitions, 1140 flow [2024-06-27 20:42:23,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1070, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1140, PETRI_PLACES=188, PETRI_TRANSITIONS=136} [2024-06-27 20:42:23,651 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 157 predicate places. [2024-06-27 20:42:23,651 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 136 transitions, 1140 flow [2024-06-27 20:42:23,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:23,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:23,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:23,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 20:42:23,651 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)] === [2024-06-27 20:42:23,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:23,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1043706507, now seen corresponding path program 4 times [2024-06-27 20:42:23,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:23,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547795937] [2024-06-27 20:42:23,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:23,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:23,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:24,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:24,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:24,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547795937] [2024-06-27 20:42:24,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547795937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:24,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:24,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:42:24,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630141157] [2024-06-27 20:42:24,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:24,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:42:24,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:24,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:42:24,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:42:24,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:24,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 136 transitions, 1140 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:24,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:24,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:24,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:24,726 INFO L124 PetriNetUnfolderBase]: 348/743 cut-off events. [2024-06-27 20:42:24,726 INFO L125 PetriNetUnfolderBase]: For 31590/31590 co-relation queries the response was YES. [2024-06-27 20:42:24,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3675 conditions, 743 events. 348/743 cut-off events. For 31590/31590 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4001 event pairs, 72 based on Foata normal form. 6/744 useless extension candidates. Maximal degree in co-relation 3594. Up to 463 conditions per place. [2024-06-27 20:42:24,730 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 105 selfloop transitions, 40 changer transitions 6/155 dead transitions. [2024-06-27 20:42:24,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 155 transitions, 1666 flow [2024-06-27 20:42:24,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:42:24,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:42:24,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 152 transitions. [2024-06-27 20:42:24,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-27 20:42:24,731 INFO L175 Difference]: Start difference. First operand has 188 places, 136 transitions, 1140 flow. Second operand 11 states and 152 transitions. [2024-06-27 20:42:24,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 155 transitions, 1666 flow [2024-06-27 20:42:24,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 155 transitions, 1560 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-27 20:42:24,798 INFO L231 Difference]: Finished difference. Result has 189 places, 134 transitions, 1106 flow [2024-06-27 20:42:24,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1034, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1106, PETRI_PLACES=189, PETRI_TRANSITIONS=134} [2024-06-27 20:42:24,799 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 158 predicate places. [2024-06-27 20:42:24,799 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 134 transitions, 1106 flow [2024-06-27 20:42:24,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:24,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:24,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:24,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 20:42:24,800 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)] === [2024-06-27 20:42:24,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:24,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1043715807, now seen corresponding path program 5 times [2024-06-27 20:42:24,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:24,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619163690] [2024-06-27 20:42:24,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:24,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:24,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:25,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:25,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:25,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619163690] [2024-06-27 20:42:25,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619163690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:25,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:25,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:42:25,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680019407] [2024-06-27 20:42:25,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:25,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:42:25,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:25,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:42:25,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:42:25,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:25,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 134 transitions, 1106 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:25,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:25,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:25,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:25,974 INFO L124 PetriNetUnfolderBase]: 324/693 cut-off events. [2024-06-27 20:42:25,975 INFO L125 PetriNetUnfolderBase]: For 24344/24344 co-relation queries the response was YES. [2024-06-27 20:42:25,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2980 conditions, 693 events. 324/693 cut-off events. For 24344/24344 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3724 event pairs, 70 based on Foata normal form. 8/698 useless extension candidates. Maximal degree in co-relation 2898. Up to 495 conditions per place. [2024-06-27 20:42:25,980 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 102 selfloop transitions, 29 changer transitions 13/148 dead transitions. [2024-06-27 20:42:25,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 148 transitions, 1468 flow [2024-06-27 20:42:25,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:42:25,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:42:25,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 146 transitions. [2024-06-27 20:42:25,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-06-27 20:42:25,981 INFO L175 Difference]: Start difference. First operand has 189 places, 134 transitions, 1106 flow. Second operand 11 states and 146 transitions. [2024-06-27 20:42:25,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 148 transitions, 1468 flow [2024-06-27 20:42:26,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 148 transitions, 1386 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-27 20:42:26,036 INFO L231 Difference]: Finished difference. Result has 188 places, 129 transitions, 1055 flow [2024-06-27 20:42:26,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1024, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1055, PETRI_PLACES=188, PETRI_TRANSITIONS=129} [2024-06-27 20:42:26,037 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 157 predicate places. [2024-06-27 20:42:26,037 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 129 transitions, 1055 flow [2024-06-27 20:42:26,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:26,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:26,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:26,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 20:42:26,037 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)] === [2024-06-27 20:42:26,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:26,038 INFO L85 PathProgramCache]: Analyzing trace with hash 389283233, now seen corresponding path program 6 times [2024-06-27 20:42:26,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:26,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637034803] [2024-06-27 20:42:26,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:26,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:26,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:26,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:26,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:27,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637034803] [2024-06-27 20:42:27,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637034803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:27,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:27,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:42:27,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539684737] [2024-06-27 20:42:27,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:27,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:42:27,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:27,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:42:27,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:42:27,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:27,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 129 transitions, 1055 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:27,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:27,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:27,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:27,386 INFO L124 PetriNetUnfolderBase]: 335/722 cut-off events. [2024-06-27 20:42:27,387 INFO L125 PetriNetUnfolderBase]: For 31520/31520 co-relation queries the response was YES. [2024-06-27 20:42:27,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3515 conditions, 722 events. 335/722 cut-off events. For 31520/31520 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3882 event pairs, 72 based on Foata normal form. 6/723 useless extension candidates. Maximal degree in co-relation 3434. Up to 398 conditions per place. [2024-06-27 20:42:27,391 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 89 selfloop transitions, 49 changer transitions 9/151 dead transitions. [2024-06-27 20:42:27,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 151 transitions, 1579 flow [2024-06-27 20:42:27,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:42:27,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:42:27,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 174 transitions. [2024-06-27 20:42:27,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4182692307692308 [2024-06-27 20:42:27,392 INFO L175 Difference]: Start difference. First operand has 188 places, 129 transitions, 1055 flow. Second operand 13 states and 174 transitions. [2024-06-27 20:42:27,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 151 transitions, 1579 flow [2024-06-27 20:42:27,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 151 transitions, 1485 flow, removed 18 selfloop flow, removed 10 redundant places. [2024-06-27 20:42:27,459 INFO L231 Difference]: Finished difference. Result has 183 places, 126 transitions, 1064 flow [2024-06-27 20:42:27,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=981, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1064, PETRI_PLACES=183, PETRI_TRANSITIONS=126} [2024-06-27 20:42:27,459 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 152 predicate places. [2024-06-27 20:42:27,459 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 126 transitions, 1064 flow [2024-06-27 20:42:27,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:27,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:27,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:27,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 20:42:27,460 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)] === [2024-06-27 20:42:27,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:27,460 INFO L85 PathProgramCache]: Analyzing trace with hash 18385283, now seen corresponding path program 7 times [2024-06-27 20:42:27,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:27,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046539549] [2024-06-27 20:42:27,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:27,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:27,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:28,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:28,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:28,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046539549] [2024-06-27 20:42:28,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046539549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:28,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:28,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:42:28,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055408008] [2024-06-27 20:42:28,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:28,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:42:28,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:28,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:42:28,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:42:28,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:28,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 126 transitions, 1064 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:28,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:28,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:28,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:28,832 INFO L124 PetriNetUnfolderBase]: 348/749 cut-off events. [2024-06-27 20:42:28,833 INFO L125 PetriNetUnfolderBase]: For 38257/38257 co-relation queries the response was YES. [2024-06-27 20:42:28,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4010 conditions, 749 events. 348/749 cut-off events. For 38257/38257 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4038 event pairs, 81 based on Foata normal form. 6/752 useless extension candidates. Maximal degree in co-relation 3932. Up to 458 conditions per place. [2024-06-27 20:42:28,837 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 88 selfloop transitions, 54 changer transitions 6/152 dead transitions. [2024-06-27 20:42:28,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 152 transitions, 1590 flow [2024-06-27 20:42:28,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 20:42:28,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 20:42:28,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 187 transitions. [2024-06-27 20:42:28,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4174107142857143 [2024-06-27 20:42:28,838 INFO L175 Difference]: Start difference. First operand has 183 places, 126 transitions, 1064 flow. Second operand 14 states and 187 transitions. [2024-06-27 20:42:28,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 152 transitions, 1590 flow [2024-06-27 20:42:28,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 152 transitions, 1482 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-27 20:42:28,920 INFO L231 Difference]: Finished difference. Result has 181 places, 126 transitions, 1070 flow [2024-06-27 20:42:28,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=964, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1070, PETRI_PLACES=181, PETRI_TRANSITIONS=126} [2024-06-27 20:42:28,920 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 150 predicate places. [2024-06-27 20:42:28,920 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 126 transitions, 1070 flow [2024-06-27 20:42:28,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:28,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:28,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:28,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 20:42:28,921 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)] === [2024-06-27 20:42:28,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:28,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1474781571, now seen corresponding path program 8 times [2024-06-27 20:42:28,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:28,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400497484] [2024-06-27 20:42:28,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:28,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:28,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:29,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:29,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:29,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400497484] [2024-06-27 20:42:29,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400497484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:29,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:29,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:42:29,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257499049] [2024-06-27 20:42:29,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:29,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:42:29,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:29,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:42:29,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:42:29,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:29,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 126 transitions, 1070 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:29,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:29,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:29,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:30,218 INFO L124 PetriNetUnfolderBase]: 357/762 cut-off events. [2024-06-27 20:42:30,219 INFO L125 PetriNetUnfolderBase]: For 41941/41941 co-relation queries the response was YES. [2024-06-27 20:42:30,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4330 conditions, 762 events. 357/762 cut-off events. For 41941/41941 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4116 event pairs, 91 based on Foata normal form. 6/763 useless extension candidates. Maximal degree in co-relation 4254. Up to 493 conditions per place. [2024-06-27 20:42:30,224 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 89 selfloop transitions, 47 changer transitions 6/146 dead transitions. [2024-06-27 20:42:30,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 146 transitions, 1558 flow [2024-06-27 20:42:30,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:42:30,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:42:30,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 163 transitions. [2024-06-27 20:42:30,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4244791666666667 [2024-06-27 20:42:30,225 INFO L175 Difference]: Start difference. First operand has 181 places, 126 transitions, 1070 flow. Second operand 12 states and 163 transitions. [2024-06-27 20:42:30,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 146 transitions, 1558 flow [2024-06-27 20:42:30,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 146 transitions, 1453 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-27 20:42:30,315 INFO L231 Difference]: Finished difference. Result has 180 places, 124 transitions, 1053 flow [2024-06-27 20:42:30,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=967, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1053, PETRI_PLACES=180, PETRI_TRANSITIONS=124} [2024-06-27 20:42:30,315 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 149 predicate places. [2024-06-27 20:42:30,315 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 124 transitions, 1053 flow [2024-06-27 20:42:30,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:30,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:30,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:30,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 20:42:30,316 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)] === [2024-06-27 20:42:30,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:30,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1474455141, now seen corresponding path program 9 times [2024-06-27 20:42:30,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:30,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652713512] [2024-06-27 20:42:30,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:30,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:30,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:31,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:31,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:31,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652713512] [2024-06-27 20:42:31,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652713512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:31,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:31,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:42:31,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548495398] [2024-06-27 20:42:31,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:31,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:42:31,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:31,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:42:31,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:42:31,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:31,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 124 transitions, 1053 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:31,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:31,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:31,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:31,766 INFO L124 PetriNetUnfolderBase]: 333/712 cut-off events. [2024-06-27 20:42:31,766 INFO L125 PetriNetUnfolderBase]: For 35212/35212 co-relation queries the response was YES. [2024-06-27 20:42:31,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3735 conditions, 712 events. 333/712 cut-off events. For 35212/35212 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3763 event pairs, 89 based on Foata normal form. 8/717 useless extension candidates. Maximal degree in co-relation 3660. Up to 525 conditions per place. [2024-06-27 20:42:31,771 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 89 selfloop transitions, 33 changer transitions 13/139 dead transitions. [2024-06-27 20:42:31,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 139 transitions, 1391 flow [2024-06-27 20:42:31,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:42:31,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:42:31,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 157 transitions. [2024-06-27 20:42:31,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4088541666666667 [2024-06-27 20:42:31,773 INFO L175 Difference]: Start difference. First operand has 180 places, 124 transitions, 1053 flow. Second operand 12 states and 157 transitions. [2024-06-27 20:42:31,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 139 transitions, 1391 flow [2024-06-27 20:42:31,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 139 transitions, 1295 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-27 20:42:31,876 INFO L231 Difference]: Finished difference. Result has 179 places, 119 transitions, 997 flow [2024-06-27 20:42:31,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=957, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=997, PETRI_PLACES=179, PETRI_TRANSITIONS=119} [2024-06-27 20:42:31,877 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 148 predicate places. [2024-06-27 20:42:31,877 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 119 transitions, 997 flow [2024-06-27 20:42:31,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:31,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:31,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:31,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 20:42:31,877 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)] === [2024-06-27 20:42:31,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:31,878 INFO L85 PathProgramCache]: Analyzing trace with hash -759007631, now seen corresponding path program 10 times [2024-06-27 20:42:31,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:31,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602757511] [2024-06-27 20:42:31,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:31,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:31,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:32,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:32,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:32,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602757511] [2024-06-27 20:42:32,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602757511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:32,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:32,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:42:32,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271039464] [2024-06-27 20:42:32,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:32,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:42:32,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:32,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:42:32,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:42:32,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:32,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 119 transitions, 997 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:32,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:32,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:32,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:33,282 INFO L124 PetriNetUnfolderBase]: 319/688 cut-off events. [2024-06-27 20:42:33,282 INFO L125 PetriNetUnfolderBase]: For 31382/31382 co-relation queries the response was YES. [2024-06-27 20:42:33,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3480 conditions, 688 events. 319/688 cut-off events. For 31382/31382 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3616 event pairs, 90 based on Foata normal form. 8/693 useless extension candidates. Maximal degree in co-relation 3406. Up to 502 conditions per place. [2024-06-27 20:42:33,286 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 86 selfloop transitions, 35 changer transitions 9/134 dead transitions. [2024-06-27 20:42:33,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 134 transitions, 1325 flow [2024-06-27 20:42:33,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:42:33,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:42:33,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 155 transitions. [2024-06-27 20:42:33,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4036458333333333 [2024-06-27 20:42:33,287 INFO L175 Difference]: Start difference. First operand has 179 places, 119 transitions, 997 flow. Second operand 12 states and 155 transitions. [2024-06-27 20:42:33,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 134 transitions, 1325 flow [2024-06-27 20:42:33,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 134 transitions, 1235 flow, removed 12 selfloop flow, removed 11 redundant places. [2024-06-27 20:42:33,352 INFO L231 Difference]: Finished difference. Result has 172 places, 116 transitions, 968 flow [2024-06-27 20:42:33,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=915, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=968, PETRI_PLACES=172, PETRI_TRANSITIONS=116} [2024-06-27 20:42:33,353 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 141 predicate places. [2024-06-27 20:42:33,353 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 116 transitions, 968 flow [2024-06-27 20:42:33,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:33,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:33,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:33,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 20:42:33,354 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)] === [2024-06-27 20:42:33,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:33,354 INFO L85 PathProgramCache]: Analyzing trace with hash 230214471, now seen corresponding path program 11 times [2024-06-27 20:42:33,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:33,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222932991] [2024-06-27 20:42:33,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:33,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:34,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:34,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:34,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222932991] [2024-06-27 20:42:34,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222932991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:34,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:34,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:42:34,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177747065] [2024-06-27 20:42:34,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:34,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:42:34,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:34,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:42:34,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:42:34,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:34,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 116 transitions, 968 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:34,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:34,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:34,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:34,670 INFO L124 PetriNetUnfolderBase]: 292/631 cut-off events. [2024-06-27 20:42:34,671 INFO L125 PetriNetUnfolderBase]: For 20111/20111 co-relation queries the response was YES. [2024-06-27 20:42:34,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2791 conditions, 631 events. 292/631 cut-off events. For 20111/20111 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3243 event pairs, 72 based on Foata normal form. 8/634 useless extension candidates. Maximal degree in co-relation 2720. Up to 408 conditions per place. [2024-06-27 20:42:34,674 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 73 selfloop transitions, 44 changer transitions 12/133 dead transitions. [2024-06-27 20:42:34,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 133 transitions, 1294 flow [2024-06-27 20:42:34,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:42:34,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:42:34,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 165 transitions. [2024-06-27 20:42:34,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39663461538461536 [2024-06-27 20:42:34,676 INFO L175 Difference]: Start difference. First operand has 172 places, 116 transitions, 968 flow. Second operand 13 states and 165 transitions. [2024-06-27 20:42:34,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 133 transitions, 1294 flow [2024-06-27 20:42:34,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 133 transitions, 1215 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-06-27 20:42:34,716 INFO L231 Difference]: Finished difference. Result has 171 places, 111 transitions, 948 flow [2024-06-27 20:42:34,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=948, PETRI_PLACES=171, PETRI_TRANSITIONS=111} [2024-06-27 20:42:34,716 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 140 predicate places. [2024-06-27 20:42:34,716 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 111 transitions, 948 flow [2024-06-27 20:42:34,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:34,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:34,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:34,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 20:42:34,717 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)] === [2024-06-27 20:42:34,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:34,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1791097927, now seen corresponding path program 12 times [2024-06-27 20:42:34,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:34,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607967664] [2024-06-27 20:42:34,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:34,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:34,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:35,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:35,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:35,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607967664] [2024-06-27 20:42:35,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607967664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:35,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:35,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:42:35,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24500360] [2024-06-27 20:42:35,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:35,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:42:35,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:35,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:42:35,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:42:35,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:35,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 111 transitions, 948 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:35,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:35,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:35,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:36,328 INFO L124 PetriNetUnfolderBase]: 265/572 cut-off events. [2024-06-27 20:42:36,328 INFO L125 PetriNetUnfolderBase]: For 12350/12350 co-relation queries the response was YES. [2024-06-27 20:42:36,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2307 conditions, 572 events. 265/572 cut-off events. For 12350/12350 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2852 event pairs, 61 based on Foata normal form. 6/575 useless extension candidates. Maximal degree in co-relation 2236. Up to 397 conditions per place. [2024-06-27 20:42:36,331 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 77 selfloop transitions, 30 changer transitions 14/125 dead transitions. [2024-06-27 20:42:36,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 125 transitions, 1220 flow [2024-06-27 20:42:36,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:42:36,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:42:36,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 150 transitions. [2024-06-27 20:42:36,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.390625 [2024-06-27 20:42:36,333 INFO L175 Difference]: Start difference. First operand has 171 places, 111 transitions, 948 flow. Second operand 12 states and 150 transitions. [2024-06-27 20:42:36,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 125 transitions, 1220 flow [2024-06-27 20:42:36,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 125 transitions, 1112 flow, removed 10 selfloop flow, removed 13 redundant places. [2024-06-27 20:42:36,354 INFO L231 Difference]: Finished difference. Result has 163 places, 105 transitions, 858 flow [2024-06-27 20:42:36,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=858, PETRI_PLACES=163, PETRI_TRANSITIONS=105} [2024-06-27 20:42:36,355 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 132 predicate places. [2024-06-27 20:42:36,355 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 105 transitions, 858 flow [2024-06-27 20:42:36,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:36,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:36,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:36,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 20:42:36,357 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)] === [2024-06-27 20:42:36,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:36,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1093767227, now seen corresponding path program 1 times [2024-06-27 20:42:36,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:36,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242959170] [2024-06-27 20:42:36,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:36,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:36,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:37,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:37,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:37,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242959170] [2024-06-27 20:42:37,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242959170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:37,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:37,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:42:37,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451016584] [2024-06-27 20:42:37,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:37,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:42:37,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:37,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:42:37,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:42:37,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:37,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 105 transitions, 858 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:37,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:37,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:37,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:37,610 INFO L124 PetriNetUnfolderBase]: 263/558 cut-off events. [2024-06-27 20:42:37,610 INFO L125 PetriNetUnfolderBase]: For 11279/11279 co-relation queries the response was YES. [2024-06-27 20:42:37,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2170 conditions, 558 events. 263/558 cut-off events. For 11279/11279 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2734 event pairs, 53 based on Foata normal form. 6/559 useless extension candidates. Maximal degree in co-relation 2102. Up to 352 conditions per place. [2024-06-27 20:42:37,614 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 75 selfloop transitions, 29 changer transitions 15/123 dead transitions. [2024-06-27 20:42:37,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 123 transitions, 1144 flow [2024-06-27 20:42:37,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:42:37,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:42:37,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 132 transitions. [2024-06-27 20:42:37,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-27 20:42:37,615 INFO L175 Difference]: Start difference. First operand has 163 places, 105 transitions, 858 flow. Second operand 10 states and 132 transitions. [2024-06-27 20:42:37,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 123 transitions, 1144 flow [2024-06-27 20:42:37,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 123 transitions, 1061 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-27 20:42:37,631 INFO L231 Difference]: Finished difference. Result has 154 places, 100 transitions, 792 flow [2024-06-27 20:42:37,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=792, PETRI_PLACES=154, PETRI_TRANSITIONS=100} [2024-06-27 20:42:37,632 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 123 predicate places. [2024-06-27 20:42:37,632 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 100 transitions, 792 flow [2024-06-27 20:42:37,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:37,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:37,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:37,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 20:42:37,632 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)] === [2024-06-27 20:42:37,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:37,633 INFO L85 PathProgramCache]: Analyzing trace with hash -394329619, now seen corresponding path program 2 times [2024-06-27 20:42:37,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:37,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761479443] [2024-06-27 20:42:37,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:37,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:37,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:38,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:38,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:38,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761479443] [2024-06-27 20:42:38,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761479443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:38,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:38,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:42:38,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741246563] [2024-06-27 20:42:38,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:38,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:42:38,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:38,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:42:38,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:42:38,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:38,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 100 transitions, 792 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:38,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:38,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:38,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:38,680 INFO L124 PetriNetUnfolderBase]: 260/558 cut-off events. [2024-06-27 20:42:38,681 INFO L125 PetriNetUnfolderBase]: For 9731/9731 co-relation queries the response was YES. [2024-06-27 20:42:38,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2095 conditions, 558 events. 260/558 cut-off events. For 9731/9731 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2733 event pairs, 51 based on Foata normal form. 6/560 useless extension candidates. Maximal degree in co-relation 2029. Up to 428 conditions per place. [2024-06-27 20:42:38,683 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 88 selfloop transitions, 14 changer transitions 21/127 dead transitions. [2024-06-27 20:42:38,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 127 transitions, 1126 flow [2024-06-27 20:42:38,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:42:38,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:42:38,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 143 transitions. [2024-06-27 20:42:38,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-27 20:42:38,684 INFO L175 Difference]: Start difference. First operand has 154 places, 100 transitions, 792 flow. Second operand 11 states and 143 transitions. [2024-06-27 20:42:38,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 127 transitions, 1126 flow [2024-06-27 20:42:38,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 127 transitions, 1061 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-27 20:42:38,703 INFO L231 Difference]: Finished difference. Result has 157 places, 101 transitions, 781 flow [2024-06-27 20:42:38,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=729, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=781, PETRI_PLACES=157, PETRI_TRANSITIONS=101} [2024-06-27 20:42:38,703 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 126 predicate places. [2024-06-27 20:42:38,703 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 101 transitions, 781 flow [2024-06-27 20:42:38,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:38,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:38,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:38,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 20:42:38,704 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)] === [2024-06-27 20:42:38,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:38,704 INFO L85 PathProgramCache]: Analyzing trace with hash 489095133, now seen corresponding path program 3 times [2024-06-27 20:42:38,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:38,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796241988] [2024-06-27 20:42:38,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:38,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:38,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:39,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:39,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:39,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796241988] [2024-06-27 20:42:39,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796241988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:39,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:39,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:42:39,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774465250] [2024-06-27 20:42:39,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:39,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:42:39,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:39,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:42:39,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:42:39,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:39,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 101 transitions, 781 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:39,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:39,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:39,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:39,829 INFO L124 PetriNetUnfolderBase]: 248/535 cut-off events. [2024-06-27 20:42:39,830 INFO L125 PetriNetUnfolderBase]: For 9273/9273 co-relation queries the response was YES. [2024-06-27 20:42:39,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2000 conditions, 535 events. 248/535 cut-off events. For 9273/9273 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2617 event pairs, 51 based on Foata normal form. 6/537 useless extension candidates. Maximal degree in co-relation 1931. Up to 337 conditions per place. [2024-06-27 20:42:39,832 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 81 selfloop transitions, 19 changer transitions 16/120 dead transitions. [2024-06-27 20:42:39,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 120 transitions, 1061 flow [2024-06-27 20:42:39,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:42:39,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:42:39,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 130 transitions. [2024-06-27 20:42:39,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-27 20:42:39,833 INFO L175 Difference]: Start difference. First operand has 157 places, 101 transitions, 781 flow. Second operand 10 states and 130 transitions. [2024-06-27 20:42:39,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 120 transitions, 1061 flow [2024-06-27 20:42:39,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 120 transitions, 1025 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-27 20:42:39,852 INFO L231 Difference]: Finished difference. Result has 155 places, 98 transitions, 768 flow [2024-06-27 20:42:39,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=745, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=768, PETRI_PLACES=155, PETRI_TRANSITIONS=98} [2024-06-27 20:42:39,852 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 124 predicate places. [2024-06-27 20:42:39,852 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 98 transitions, 768 flow [2024-06-27 20:42:39,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:39,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:39,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:39,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 20:42:39,853 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)] === [2024-06-27 20:42:39,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:39,853 INFO L85 PathProgramCache]: Analyzing trace with hash -361200753, now seen corresponding path program 4 times [2024-06-27 20:42:39,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:39,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560482717] [2024-06-27 20:42:39,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:39,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:39,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:40,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:40,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:40,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560482717] [2024-06-27 20:42:40,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560482717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:40,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:40,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:42:40,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80200120] [2024-06-27 20:42:40,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:40,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:42:40,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:40,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:42:40,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:42:40,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:40,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 98 transitions, 768 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:40,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:40,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:40,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:41,164 INFO L124 PetriNetUnfolderBase]: 228/499 cut-off events. [2024-06-27 20:42:41,164 INFO L125 PetriNetUnfolderBase]: For 9261/9261 co-relation queries the response was YES. [2024-06-27 20:42:41,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1891 conditions, 499 events. 228/499 cut-off events. For 9261/9261 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2383 event pairs, 51 based on Foata normal form. 6/501 useless extension candidates. Maximal degree in co-relation 1824. Up to 333 conditions per place. [2024-06-27 20:42:41,167 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 67 selfloop transitions, 21 changer transitions 20/112 dead transitions. [2024-06-27 20:42:41,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 112 transitions, 1016 flow [2024-06-27 20:42:41,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:42:41,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:42:41,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 129 transitions. [2024-06-27 20:42:41,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403125 [2024-06-27 20:42:41,168 INFO L175 Difference]: Start difference. First operand has 155 places, 98 transitions, 768 flow. Second operand 10 states and 129 transitions. [2024-06-27 20:42:41,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 112 transitions, 1016 flow [2024-06-27 20:42:41,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 112 transitions, 968 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-27 20:42:41,183 INFO L231 Difference]: Finished difference. Result has 150 places, 86 transitions, 659 flow [2024-06-27 20:42:41,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=659, PETRI_PLACES=150, PETRI_TRANSITIONS=86} [2024-06-27 20:42:41,184 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 119 predicate places. [2024-06-27 20:42:41,184 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 86 transitions, 659 flow [2024-06-27 20:42:41,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:41,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:41,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:41,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 20:42:41,184 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)] === [2024-06-27 20:42:41,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:41,185 INFO L85 PathProgramCache]: Analyzing trace with hash -379259691, now seen corresponding path program 5 times [2024-06-27 20:42:41,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:41,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075790830] [2024-06-27 20:42:41,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:41,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:41,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:42,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:42,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:42,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075790830] [2024-06-27 20:42:42,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075790830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:42,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:42,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:42:42,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565976152] [2024-06-27 20:42:42,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:42,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:42:42,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:42,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:42:42,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:42:42,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:42,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 86 transitions, 659 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:42,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:42,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:42,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:42,495 INFO L124 PetriNetUnfolderBase]: 210/463 cut-off events. [2024-06-27 20:42:42,496 INFO L125 PetriNetUnfolderBase]: For 8651/8651 co-relation queries the response was YES. [2024-06-27 20:42:42,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1710 conditions, 463 events. 210/463 cut-off events. For 8651/8651 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2135 event pairs, 60 based on Foata normal form. 6/467 useless extension candidates. Maximal degree in co-relation 1660. Up to 300 conditions per place. [2024-06-27 20:42:42,498 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 59 selfloop transitions, 28 changer transitions 13/104 dead transitions. [2024-06-27 20:42:42,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 104 transitions, 912 flow [2024-06-27 20:42:42,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:42:42,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:42:42,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 140 transitions. [2024-06-27 20:42:42,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-27 20:42:42,499 INFO L175 Difference]: Start difference. First operand has 150 places, 86 transitions, 659 flow. Second operand 11 states and 140 transitions. [2024-06-27 20:42:42,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 104 transitions, 912 flow [2024-06-27 20:42:42,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 104 transitions, 822 flow, removed 4 selfloop flow, removed 14 redundant places. [2024-06-27 20:42:42,511 INFO L231 Difference]: Finished difference. Result has 139 places, 85 transitions, 630 flow [2024-06-27 20:42:42,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=630, PETRI_PLACES=139, PETRI_TRANSITIONS=85} [2024-06-27 20:42:42,511 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 108 predicate places. [2024-06-27 20:42:42,511 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 85 transitions, 630 flow [2024-06-27 20:42:42,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:42,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:42,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:42,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 20:42:42,512 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)] === [2024-06-27 20:42:42,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:42,512 INFO L85 PathProgramCache]: Analyzing trace with hash -21566051, now seen corresponding path program 6 times [2024-06-27 20:42:42,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:42,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175888172] [2024-06-27 20:42:42,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:42,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:42,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:43,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:43,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:43,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175888172] [2024-06-27 20:42:43,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175888172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:43,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:43,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:42:43,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275922795] [2024-06-27 20:42:43,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:43,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:42:43,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:43,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:42:43,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:42:43,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:43,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 85 transitions, 630 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:43,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:43,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:43,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:43,953 INFO L124 PetriNetUnfolderBase]: 203/448 cut-off events. [2024-06-27 20:42:43,953 INFO L125 PetriNetUnfolderBase]: For 8240/8240 co-relation queries the response was YES. [2024-06-27 20:42:43,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1606 conditions, 448 events. 203/448 cut-off events. For 8240/8240 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2048 event pairs, 60 based on Foata normal form. 6/452 useless extension candidates. Maximal degree in co-relation 1559. Up to 290 conditions per place. [2024-06-27 20:42:43,956 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 60 selfloop transitions, 24 changer transitions 13/101 dead transitions. [2024-06-27 20:42:43,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 101 transitions, 863 flow [2024-06-27 20:42:43,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:42:43,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:42:43,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 137 transitions. [2024-06-27 20:42:43,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38920454545454547 [2024-06-27 20:42:43,957 INFO L175 Difference]: Start difference. First operand has 139 places, 85 transitions, 630 flow. Second operand 11 states and 137 transitions. [2024-06-27 20:42:43,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 101 transitions, 863 flow [2024-06-27 20:42:43,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 101 transitions, 799 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 20:42:43,969 INFO L231 Difference]: Finished difference. Result has 138 places, 82 transitions, 601 flow [2024-06-27 20:42:43,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=601, PETRI_PLACES=138, PETRI_TRANSITIONS=82} [2024-06-27 20:42:43,969 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 107 predicate places. [2024-06-27 20:42:43,969 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 82 transitions, 601 flow [2024-06-27 20:42:43,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:43,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:43,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:43,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 20:42:43,970 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)] === [2024-06-27 20:42:43,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:43,970 INFO L85 PathProgramCache]: Analyzing trace with hash -771418471, now seen corresponding path program 7 times [2024-06-27 20:42:43,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:43,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615744536] [2024-06-27 20:42:43,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:43,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:43,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:45,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:45,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:45,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615744536] [2024-06-27 20:42:45,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615744536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:45,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:45,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:42:45,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558542696] [2024-06-27 20:42:45,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:45,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:42:45,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:45,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:42:45,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:42:45,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:45,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 82 transitions, 601 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:45,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:45,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:45,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:45,447 INFO L124 PetriNetUnfolderBase]: 192/427 cut-off events. [2024-06-27 20:42:45,448 INFO L125 PetriNetUnfolderBase]: For 8232/8232 co-relation queries the response was YES. [2024-06-27 20:42:45,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1531 conditions, 427 events. 192/427 cut-off events. For 8232/8232 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1912 event pairs, 58 based on Foata normal form. 6/431 useless extension candidates. Maximal degree in co-relation 1485. Up to 272 conditions per place. [2024-06-27 20:42:45,450 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 56 selfloop transitions, 24 changer transitions 13/97 dead transitions. [2024-06-27 20:42:45,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 97 transitions, 821 flow [2024-06-27 20:42:45,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:42:45,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:42:45,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2024-06-27 20:42:45,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39488636363636365 [2024-06-27 20:42:45,451 INFO L175 Difference]: Start difference. First operand has 138 places, 82 transitions, 601 flow. Second operand 11 states and 139 transitions. [2024-06-27 20:42:45,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 97 transitions, 821 flow [2024-06-27 20:42:45,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 97 transitions, 763 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-27 20:42:45,462 INFO L231 Difference]: Finished difference. Result has 135 places, 78 transitions, 571 flow [2024-06-27 20:42:45,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=571, PETRI_PLACES=135, PETRI_TRANSITIONS=78} [2024-06-27 20:42:45,462 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 104 predicate places. [2024-06-27 20:42:45,462 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 78 transitions, 571 flow [2024-06-27 20:42:45,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:45,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:45,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:45,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 20:42:45,463 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)] === [2024-06-27 20:42:45,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:45,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1860071091, now seen corresponding path program 8 times [2024-06-27 20:42:45,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:45,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500007612] [2024-06-27 20:42:45,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:45,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:45,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:46,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:46,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:46,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500007612] [2024-06-27 20:42:46,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500007612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:46,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:46,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:42:46,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031853202] [2024-06-27 20:42:46,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:46,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:42:46,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:46,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:42:46,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:42:46,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:46,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 78 transitions, 571 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:46,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:46,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:46,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:47,034 INFO L124 PetriNetUnfolderBase]: 185/414 cut-off events. [2024-06-27 20:42:47,034 INFO L125 PetriNetUnfolderBase]: For 8192/8192 co-relation queries the response was YES. [2024-06-27 20:42:47,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1478 conditions, 414 events. 185/414 cut-off events. For 8192/8192 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1842 event pairs, 56 based on Foata normal form. 6/418 useless extension candidates. Maximal degree in co-relation 1433. Up to 254 conditions per place. [2024-06-27 20:42:47,036 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 53 selfloop transitions, 19 changer transitions 19/95 dead transitions. [2024-06-27 20:42:47,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 95 transitions, 792 flow [2024-06-27 20:42:47,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:42:47,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:42:47,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2024-06-27 20:42:47,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39488636363636365 [2024-06-27 20:42:47,037 INFO L175 Difference]: Start difference. First operand has 135 places, 78 transitions, 571 flow. Second operand 11 states and 139 transitions. [2024-06-27 20:42:47,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 95 transitions, 792 flow [2024-06-27 20:42:47,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 95 transitions, 709 flow, removed 3 selfloop flow, removed 13 redundant places. [2024-06-27 20:42:47,048 INFO L231 Difference]: Finished difference. Result has 128 places, 71 transitions, 489 flow [2024-06-27 20:42:47,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=489, PETRI_PLACES=128, PETRI_TRANSITIONS=71} [2024-06-27 20:42:47,049 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 97 predicate places. [2024-06-27 20:42:47,049 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 71 transitions, 489 flow [2024-06-27 20:42:47,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:47,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:47,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:47,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 20:42:47,050 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)] === [2024-06-27 20:42:47,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:47,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1598023577, now seen corresponding path program 9 times [2024-06-27 20:42:47,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:47,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737687188] [2024-06-27 20:42:47,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:47,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:47,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:47,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:47,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:47,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737687188] [2024-06-27 20:42:47,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737687188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:47,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:47,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:42:47,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911730669] [2024-06-27 20:42:47,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:47,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:42:47,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:47,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:42:47,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:42:48,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:48,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 71 transitions, 489 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:48,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:48,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:48,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:48,290 INFO L124 PetriNetUnfolderBase]: 164/373 cut-off events. [2024-06-27 20:42:48,290 INFO L125 PetriNetUnfolderBase]: For 7262/7262 co-relation queries the response was YES. [2024-06-27 20:42:48,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1315 conditions, 373 events. 164/373 cut-off events. For 7262/7262 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1609 event pairs, 52 based on Foata normal form. 6/377 useless extension candidates. Maximal degree in co-relation 1271. Up to 228 conditions per place. [2024-06-27 20:42:48,292 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 48 selfloop transitions, 17 changer transitions 18/87 dead transitions. [2024-06-27 20:42:48,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 87 transitions, 691 flow [2024-06-27 20:42:48,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:42:48,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:42:48,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 137 transitions. [2024-06-27 20:42:48,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38920454545454547 [2024-06-27 20:42:48,293 INFO L175 Difference]: Start difference. First operand has 128 places, 71 transitions, 489 flow. Second operand 11 states and 137 transitions. [2024-06-27 20:42:48,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 87 transitions, 691 flow [2024-06-27 20:42:48,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 87 transitions, 647 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 20:42:48,300 INFO L231 Difference]: Finished difference. Result has 123 places, 64 transitions, 445 flow [2024-06-27 20:42:48,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=445, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=445, PETRI_PLACES=123, PETRI_TRANSITIONS=64} [2024-06-27 20:42:48,301 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 92 predicate places. [2024-06-27 20:42:48,301 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 64 transitions, 445 flow [2024-06-27 20:42:48,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:48,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:48,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:48,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 20:42:48,302 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)] === [2024-06-27 20:42:48,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:48,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1487795703, now seen corresponding path program 10 times [2024-06-27 20:42:48,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:48,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580348839] [2024-06-27 20:42:48,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:48,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:48,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:49,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:49,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:49,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580348839] [2024-06-27 20:42:49,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580348839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:49,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:49,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:42:49,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126776394] [2024-06-27 20:42:49,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:49,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:42:49,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:49,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:42:49,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:42:49,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:49,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 64 transitions, 445 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:49,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:49,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:49,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:49,379 INFO L124 PetriNetUnfolderBase]: 145/340 cut-off events. [2024-06-27 20:42:49,379 INFO L125 PetriNetUnfolderBase]: For 6893/6893 co-relation queries the response was YES. [2024-06-27 20:42:49,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1207 conditions, 340 events. 145/340 cut-off events. For 6893/6893 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1424 event pairs, 44 based on Foata normal form. 6/344 useless extension candidates. Maximal degree in co-relation 1165. Up to 110 conditions per place. [2024-06-27 20:42:49,380 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 37 selfloop transitions, 15 changer transitions 25/81 dead transitions. [2024-06-27 20:42:49,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 81 transitions, 637 flow [2024-06-27 20:42:49,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:42:49,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:42:49,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 140 transitions. [2024-06-27 20:42:49,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-27 20:42:49,382 INFO L175 Difference]: Start difference. First operand has 123 places, 64 transitions, 445 flow. Second operand 11 states and 140 transitions. [2024-06-27 20:42:49,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 81 transitions, 637 flow [2024-06-27 20:42:49,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 81 transitions, 595 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 20:42:49,389 INFO L231 Difference]: Finished difference. Result has 116 places, 49 transitions, 334 flow [2024-06-27 20:42:49,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=334, PETRI_PLACES=116, PETRI_TRANSITIONS=49} [2024-06-27 20:42:49,389 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 85 predicate places. [2024-06-27 20:42:49,389 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 49 transitions, 334 flow [2024-06-27 20:42:49,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:49,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:49,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:49,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 20:42:49,390 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)] === [2024-06-27 20:42:49,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:49,390 INFO L85 PathProgramCache]: Analyzing trace with hash 76349329, now seen corresponding path program 11 times [2024-06-27 20:42:49,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:49,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037756287] [2024-06-27 20:42:49,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:49,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:49,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:50,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:50,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:50,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037756287] [2024-06-27 20:42:50,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037756287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:50,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:50,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:42:50,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146451005] [2024-06-27 20:42:50,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:50,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:42:50,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:50,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:42:50,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:42:50,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:50,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 49 transitions, 334 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:50,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:50,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:50,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:50,691 INFO L124 PetriNetUnfolderBase]: 107/249 cut-off events. [2024-06-27 20:42:50,692 INFO L125 PetriNetUnfolderBase]: For 5591/5591 co-relation queries the response was YES. [2024-06-27 20:42:50,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 917 conditions, 249 events. 107/249 cut-off events. For 5591/5591 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 902 event pairs, 38 based on Foata normal form. 6/253 useless extension candidates. Maximal degree in co-relation 878. Up to 106 conditions per place. [2024-06-27 20:42:50,693 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 34 selfloop transitions, 15 changer transitions 12/65 dead transitions. [2024-06-27 20:42:50,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 65 transitions, 492 flow [2024-06-27 20:42:50,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:42:50,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:42:50,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2024-06-27 20:42:50,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39204545454545453 [2024-06-27 20:42:50,694 INFO L175 Difference]: Start difference. First operand has 116 places, 49 transitions, 334 flow. Second operand 11 states and 138 transitions. [2024-06-27 20:42:50,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 65 transitions, 492 flow [2024-06-27 20:42:50,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 65 transitions, 435 flow, removed 8 selfloop flow, removed 15 redundant places. [2024-06-27 20:42:50,700 INFO L231 Difference]: Finished difference. Result has 97 places, 45 transitions, 292 flow [2024-06-27 20:42:50,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=292, PETRI_PLACES=97, PETRI_TRANSITIONS=45} [2024-06-27 20:42:50,700 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 66 predicate places. [2024-06-27 20:42:50,700 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 45 transitions, 292 flow [2024-06-27 20:42:50,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:50,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:50,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:50,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 20:42:50,701 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)] === [2024-06-27 20:42:50,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:50,701 INFO L85 PathProgramCache]: Analyzing trace with hash -244924873, now seen corresponding path program 12 times [2024-06-27 20:42:50,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:50,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634785520] [2024-06-27 20:42:50,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:50,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:50,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:51,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:51,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:51,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634785520] [2024-06-27 20:42:51,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634785520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:51,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:51,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:42:51,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88896761] [2024-06-27 20:42:51,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:51,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:42:51,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:51,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:42:51,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:42:51,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:51,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 45 transitions, 292 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:51,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:51,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:51,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:51,925 INFO L124 PetriNetUnfolderBase]: 93/223 cut-off events. [2024-06-27 20:42:51,926 INFO L125 PetriNetUnfolderBase]: For 3608/3608 co-relation queries the response was YES. [2024-06-27 20:42:51,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 791 conditions, 223 events. 93/223 cut-off events. For 3608/3608 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 775 event pairs, 38 based on Foata normal form. 6/227 useless extension candidates. Maximal degree in co-relation 758. Up to 130 conditions per place. [2024-06-27 20:42:51,927 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 33 selfloop transitions, 9 changer transitions 14/60 dead transitions. [2024-06-27 20:42:51,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 60 transitions, 438 flow [2024-06-27 20:42:51,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:42:51,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:42:51,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 136 transitions. [2024-06-27 20:42:51,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-06-27 20:42:51,928 INFO L175 Difference]: Start difference. First operand has 97 places, 45 transitions, 292 flow. Second operand 11 states and 136 transitions. [2024-06-27 20:42:51,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 60 transitions, 438 flow [2024-06-27 20:42:51,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 60 transitions, 398 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-27 20:42:51,931 INFO L231 Difference]: Finished difference. Result has 91 places, 40 transitions, 249 flow [2024-06-27 20:42:51,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=249, PETRI_PLACES=91, PETRI_TRANSITIONS=40} [2024-06-27 20:42:51,932 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 60 predicate places. [2024-06-27 20:42:51,932 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 40 transitions, 249 flow [2024-06-27 20:42:51,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:51,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:51,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:51,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 20:42:51,933 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)] === [2024-06-27 20:42:51,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:51,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1798512507, now seen corresponding path program 13 times [2024-06-27 20:42:51,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:51,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725422741] [2024-06-27 20:42:51,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:51,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:51,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:53,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:53,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:53,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725422741] [2024-06-27 20:42:53,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725422741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:53,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:53,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:42:53,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763049278] [2024-06-27 20:42:53,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:53,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:42:53,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:53,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:42:53,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:42:53,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:53,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 40 transitions, 249 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:53,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:53,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:53,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:53,518 INFO L124 PetriNetUnfolderBase]: 81/197 cut-off events. [2024-06-27 20:42:53,518 INFO L125 PetriNetUnfolderBase]: For 2762/2762 co-relation queries the response was YES. [2024-06-27 20:42:53,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685 conditions, 197 events. 81/197 cut-off events. For 2762/2762 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 635 event pairs, 36 based on Foata normal form. 6/201 useless extension candidates. Maximal degree in co-relation 655. Up to 112 conditions per place. [2024-06-27 20:42:53,519 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 29 selfloop transitions, 7 changer transitions 15/55 dead transitions. [2024-06-27 20:42:53,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 55 transitions, 385 flow [2024-06-27 20:42:53,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:42:53,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:42:53,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-27 20:42:53,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3806818181818182 [2024-06-27 20:42:53,520 INFO L175 Difference]: Start difference. First operand has 91 places, 40 transitions, 249 flow. Second operand 11 states and 134 transitions. [2024-06-27 20:42:53,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 55 transitions, 385 flow [2024-06-27 20:42:53,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 55 transitions, 351 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-27 20:42:53,522 INFO L231 Difference]: Finished difference. Result has 83 places, 34 transitions, 204 flow [2024-06-27 20:42:53,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=72, 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=204, PETRI_PLACES=83, PETRI_TRANSITIONS=34} [2024-06-27 20:42:53,523 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 52 predicate places. [2024-06-27 20:42:53,523 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 34 transitions, 204 flow [2024-06-27 20:42:53,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:53,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:53,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:53,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 20:42:53,523 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)] === [2024-06-27 20:42:53,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:53,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1189886153, now seen corresponding path program 14 times [2024-06-27 20:42:53,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:53,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057018882] [2024-06-27 20:42:53,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:53,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:53,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:54,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:54,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:54,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057018882] [2024-06-27 20:42:54,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057018882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:54,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:54,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:42:54,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541824559] [2024-06-27 20:42:54,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:54,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:42:54,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:54,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:42:54,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:42:54,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:54,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 34 transitions, 204 flow. Second operand has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:54,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:54,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:54,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:54,925 INFO L124 PetriNetUnfolderBase]: 68/166 cut-off events. [2024-06-27 20:42:54,925 INFO L125 PetriNetUnfolderBase]: For 2262/2262 co-relation queries the response was YES. [2024-06-27 20:42:54,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 579 conditions, 166 events. 68/166 cut-off events. For 2262/2262 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 473 event pairs, 40 based on Foata normal form. 6/170 useless extension candidates. Maximal degree in co-relation 551. Up to 94 conditions per place. [2024-06-27 20:42:54,926 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 19 selfloop transitions, 3 changer transitions 24/50 dead transitions. [2024-06-27 20:42:54,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 50 transitions, 332 flow [2024-06-27 20:42:54,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:42:54,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:42:54,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 141 transitions. [2024-06-27 20:42:54,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3671875 [2024-06-27 20:42:54,927 INFO L175 Difference]: Start difference. First operand has 83 places, 34 transitions, 204 flow. Second operand 12 states and 141 transitions. [2024-06-27 20:42:54,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 50 transitions, 332 flow [2024-06-27 20:42:54,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 50 transitions, 308 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-27 20:42:54,929 INFO L231 Difference]: Finished difference. Result has 75 places, 25 transitions, 138 flow [2024-06-27 20:42:54,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=138, PETRI_PLACES=75, PETRI_TRANSITIONS=25} [2024-06-27 20:42:54,929 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 44 predicate places. [2024-06-27 20:42:54,929 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 25 transitions, 138 flow [2024-06-27 20:42:54,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.23076923076923) internal successors, (120), 13 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:54,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:42:54,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:54,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 20:42:54,930 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)] === [2024-06-27 20:42:54,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:42:54,930 INFO L85 PathProgramCache]: Analyzing trace with hash 174397953, now seen corresponding path program 15 times [2024-06-27 20:42:54,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:42:54,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993658992] [2024-06-27 20:42:54,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:42:54,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:42:54,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:42:55,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:42:55,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:42:55,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993658992] [2024-06-27 20:42:55,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993658992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:42:55,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:42:55,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:42:55,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967421748] [2024-06-27 20:42:55,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:42:55,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:42:55,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:42:55,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:42:55,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:42:55,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 32 [2024-06-27 20:42:55,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 25 transitions, 138 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:55,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:42:55,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 32 [2024-06-27 20:42:55,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:42:56,015 INFO L124 PetriNetUnfolderBase]: 38/91 cut-off events. [2024-06-27 20:42:56,015 INFO L125 PetriNetUnfolderBase]: For 730/730 co-relation queries the response was YES. [2024-06-27 20:42:56,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 91 events. 38/91 cut-off events. For 730/730 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 168 event pairs, 2 based on Foata normal form. 6/94 useless extension candidates. Maximal degree in co-relation 246. Up to 24 conditions per place. [2024-06-27 20:42:56,016 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 0 selfloop transitions, 0 changer transitions 37/37 dead transitions. [2024-06-27 20:42:56,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 37 transitions, 200 flow [2024-06-27 20:42:56,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:42:56,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:42:56,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-27 20:42:56,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.353125 [2024-06-27 20:42:56,017 INFO L175 Difference]: Start difference. First operand has 75 places, 25 transitions, 138 flow. Second operand 10 states and 113 transitions. [2024-06-27 20:42:56,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 37 transitions, 200 flow [2024-06-27 20:42:56,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 37 transitions, 163 flow, removed 2 selfloop flow, removed 17 redundant places. [2024-06-27 20:42:56,018 INFO L231 Difference]: Finished difference. Result has 50 places, 0 transitions, 0 flow [2024-06-27 20:42:56,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=0, PETRI_PLACES=50, PETRI_TRANSITIONS=0} [2024-06-27 20:42:56,018 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 19 predicate places. [2024-06-27 20:42:56,018 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 0 transitions, 0 flow [2024-06-27 20:42:56,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:42:56,022 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-27 20:42:56,023 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-27 20:42:56,023 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-27 20:42:56,024 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-27 20:42:56,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 20:42:56,024 INFO L445 BasicCegarLoop]: Path program histogram: [15, 12, 11, 9, 5, 5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:42:56,027 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-27 20:42:56,028 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-27 20:42:56,030 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-27 20:42:56,031 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-27 20:42:56,031 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.06 08:42:56 BasicIcfg [2024-06-27 20:42:56,031 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-27 20:42:56,032 INFO L158 Benchmark]: Toolchain (without parser) took 104123.90ms. Allocated memory was 148.9MB in the beginning and 836.8MB in the end (delta: 687.9MB). Free memory was 116.7MB in the beginning and 537.1MB in the end (delta: -420.3MB). Peak memory consumption was 266.6MB. Max. memory is 16.1GB. [2024-06-27 20:42:56,032 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 148.9MB. Free memory is still 122.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 20:42:56,032 INFO L158 Benchmark]: Witness Parser took 0.15ms. Allocated memory is still 148.9MB. Free memory is still 75.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 20:42:56,032 INFO L158 Benchmark]: CACSL2BoogieTranslator took 587.37ms. Allocated memory is still 148.9MB. Free memory was 116.7MB in the beginning and 96.3MB in the end (delta: 20.4MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2024-06-27 20:42:56,033 INFO L158 Benchmark]: Boogie Procedure Inliner took 70.19ms. Allocated memory is still 148.9MB. Free memory was 96.3MB in the beginning and 93.8MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 20:42:56,033 INFO L158 Benchmark]: Boogie Preprocessor took 70.27ms. Allocated memory is still 148.9MB. Free memory was 93.8MB in the beginning and 90.8MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 20:42:56,033 INFO L158 Benchmark]: RCFGBuilder took 599.25ms. Allocated memory was 148.9MB in the beginning and 211.8MB in the end (delta: 62.9MB). Free memory was 90.8MB in the beginning and 171.7MB in the end (delta: -80.9MB). Peak memory consumption was 58.6MB. Max. memory is 16.1GB. [2024-06-27 20:42:56,033 INFO L158 Benchmark]: TraceAbstraction took 102791.79ms. Allocated memory was 211.8MB in the beginning and 836.8MB in the end (delta: 625.0MB). Free memory was 171.7MB in the beginning and 537.1MB in the end (delta: -365.4MB). Peak memory consumption was 258.5MB. Max. memory is 16.1GB. [2024-06-27 20:42:56,034 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 148.9MB. Free memory is still 122.4MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.15ms. Allocated memory is still 148.9MB. Free memory is still 75.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 587.37ms. Allocated memory is still 148.9MB. Free memory was 116.7MB in the beginning and 96.3MB in the end (delta: 20.4MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 70.19ms. Allocated memory is still 148.9MB. Free memory was 96.3MB in the beginning and 93.8MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 70.27ms. Allocated memory is still 148.9MB. Free memory was 93.8MB in the beginning and 90.8MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 599.25ms. Allocated memory was 148.9MB in the beginning and 211.8MB in the end (delta: 62.9MB). Free memory was 90.8MB in the beginning and 171.7MB in the end (delta: -80.9MB). Peak memory consumption was 58.6MB. Max. memory is 16.1GB. * TraceAbstraction took 102791.79ms. Allocated memory was 211.8MB in the beginning and 836.8MB in the end (delta: 625.0MB). Free memory was 171.7MB in the beginning and 537.1MB in the end (delta: -365.4MB). Peak memory consumption was 258.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 816]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 817]: 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, 52 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: 102.7s, OverallIterations: 91, TraceHistogramMax: 1, PathProgramHistogramMax: 15, EmptinessCheckTime: 0.0s, AutomataDifference: 32.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6015 SdHoareTripleChecker+Valid, 18.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5034 mSDsluCounter, 4734 SdHoareTripleChecker+Invalid, 16.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4304 mSDsCounter, 902 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 32265 IncrementalHoareTripleChecker+Invalid, 33167 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 902 mSolverCounterUnsat, 430 mSDtfsCounter, 32265 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 955 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 955 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2012 ImplicationChecksByTransitivity, 27.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1322occurred in iteration=53, InterpolantAutomatonStates: 853, 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: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 69.2s InterpolantComputationTime, 1553 NumberOfCodeBlocks, 1553 NumberOfCodeBlocksAsserted, 91 NumberOfCheckSat, 1462 ConstructedInterpolants, 0 QuantifiedInterpolants, 70357 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 91 InterpolantComputations, 91 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! [2024-06-27 20:42:56,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE