./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe029_power.opt_pso.opt_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/mutex-meet-nonrel/safe029_power.opt_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe029_power.opt_pso.opt_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe029_power.opt_pso.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 22:08:44,072 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 22:08:44,169 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 22:08:44,180 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 22:08:44,181 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 22:08:44,204 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 22:08:44,205 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 22:08:44,205 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 22:08:44,206 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 22:08:44,209 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 22:08:44,210 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 22:08:44,210 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 22:08:44,211 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 22:08:44,212 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 22:08:44,212 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 22:08:44,213 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 22:08:44,213 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 22:08:44,213 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 22:08:44,214 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 22:08:44,214 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 22:08:44,214 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 22:08:44,214 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 22:08:44,215 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 22:08:44,215 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 22:08:44,215 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 22:08:44,215 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 22:08:44,216 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 22:08:44,216 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 22:08:44,216 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 22:08:44,217 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 22:08:44,218 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 22:08:44,218 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 22:08:44,218 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 22:08:44,218 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 22:08:44,218 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 22:08:44,219 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 22:08:44,219 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 22:08:44,219 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 22:08:44,219 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 22:08:44,219 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 22:08:44,220 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 22:08:44,220 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 22:08:44,220 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 22:08:44,220 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 22:08:44,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 22:08:44,475 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 22:08:44,479 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 22:08:44,480 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 22:08:44,481 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 22:08:44,482 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe029_power.opt_pso.opt_rmo.opt.i [2024-06-21 22:08:45,666 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 22:08:45,881 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 22:08:45,881 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe029_power.opt_pso.opt_rmo.opt.i [2024-06-21 22:08:45,901 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94c1bece4/ffcbbbed55d14c9ba130adbd5f12afb3/FLAG4fd13b0a7 [2024-06-21 22:08:45,914 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94c1bece4/ffcbbbed55d14c9ba130adbd5f12afb3 [2024-06-21 22:08:45,916 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 22:08:45,916 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 22:08:45,917 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe029_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-21 22:08:46,034 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 22:08:46,035 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 22:08:46,036 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 22:08:46,036 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 22:08:46,041 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 22:08:46,042 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 10:08:45" (1/2) ... [2024-06-21 22:08:46,042 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@df37974 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:08:46, skipping insertion in model container [2024-06-21 22:08:46,043 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 10:08:45" (1/2) ... [2024-06-21 22:08:46,044 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3aef75c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:08:46, skipping insertion in model container [2024-06-21 22:08:46,044 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 10:08:46" (2/2) ... [2024-06-21 22:08:46,045 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@df37974 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 10:08:46, skipping insertion in model container [2024-06-21 22:08:46,045 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 10:08:46" (2/2) ... [2024-06-21 22:08:46,045 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 22:08:46,120 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 22:08:46,122 INFO L97 edCorrectnessWitness]: Location invariant before [L794-L794] ((((((((((((! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || ((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)) && (x$w_buff1 == 0 || x$w_buff1 == 2)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt) [2024-06-21 22:08:46,122 INFO L97 edCorrectnessWitness]: Location invariant before [L793-L793] ((((((((((((! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || ((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)) && (x$w_buff1 == 0 || x$w_buff1 == 2)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt) [2024-06-21 22:08:46,122 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 22:08:46,122 INFO L106 edCorrectnessWitness]: ghost_update [L791-L791] multithreaded = 1; [2024-06-21 22:08:46,169 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 22:08:46,589 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 22:08:46,603 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 22:08:46,730 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 22:08:46,768 INFO L206 MainTranslator]: Completed translation [2024-06-21 22:08:46,770 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 10:08:46 WrapperNode [2024-06-21 22:08:46,770 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 22:08:46,771 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 22:08:46,772 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 22:08:46,772 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 22:08:46,778 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 10:08:46" (1/1) ... [2024-06-21 22:08:46,807 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 10:08:46" (1/1) ... [2024-06-21 22:08:46,834 INFO L138 Inliner]: procedures = 174, calls = 34, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 130 [2024-06-21 22:08:46,835 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 22:08:46,836 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 22:08:46,836 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 22:08:46,836 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 22:08:46,846 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 10:08:46" (1/1) ... [2024-06-21 22:08:46,846 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 10:08:46" (1/1) ... [2024-06-21 22:08:46,849 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 10:08:46" (1/1) ... [2024-06-21 22:08:46,864 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 22:08:46,864 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 10:08:46" (1/1) ... [2024-06-21 22:08:46,864 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 10:08:46" (1/1) ... [2024-06-21 22:08:46,872 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 10:08:46" (1/1) ... [2024-06-21 22:08:46,873 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 10:08:46" (1/1) ... [2024-06-21 22:08:46,875 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 10:08:46" (1/1) ... [2024-06-21 22:08:46,877 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 10:08:46" (1/1) ... [2024-06-21 22:08:46,880 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 22:08:46,881 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 22:08:46,881 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 22:08:46,881 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 22:08:46,882 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 10:08:46" (1/1) ... [2024-06-21 22:08:46,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 22:08:46,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 22:08:46,909 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 22:08:46,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 22:08:46,953 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 22:08:46,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 22:08:46,954 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 22:08:46,954 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 22:08:46,954 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 22:08:46,955 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 22:08:46,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 22:08:46,955 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 22:08:46,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 22:08:46,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 22:08:46,956 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 22:08:47,104 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 22:08:47,105 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 22:08:47,345 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 22:08:47,345 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 22:08:47,505 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 22:08:47,505 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 22:08:47,506 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 10:08:47 BoogieIcfgContainer [2024-06-21 22:08:47,506 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 22:08:47,508 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 22:08:47,508 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 22:08:47,511 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 22:08:47,512 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 10:08:45" (1/4) ... [2024-06-21 22:08:47,512 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68e3e450 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 10:08:47, skipping insertion in model container [2024-06-21 22:08:47,512 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 10:08:46" (2/4) ... [2024-06-21 22:08:47,513 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68e3e450 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 10:08:47, skipping insertion in model container [2024-06-21 22:08:47,513 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 10:08:46" (3/4) ... [2024-06-21 22:08:47,513 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68e3e450 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 10:08:47, skipping insertion in model container [2024-06-21 22:08:47,513 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 10:08:47" (4/4) ... [2024-06-21 22:08:47,515 INFO L112 eAbstractionObserver]: Analyzing ICFG safe029_power.opt_pso.opt_rmo.opt.i [2024-06-21 22:08:47,531 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 22:08:47,531 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-21 22:08:47,531 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 22:08:47,606 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 22:08:47,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 29 transitions, 66 flow [2024-06-21 22:08:47,671 INFO L124 PetriNetUnfolderBase]: 0/27 cut-off events. [2024-06-21 22:08:47,672 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 22:08:47,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 27 events. 0/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 38 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 22:08:47,673 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 29 transitions, 66 flow [2024-06-21 22:08:47,676 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 21 transitions, 48 flow [2024-06-21 22:08:47,684 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 22:08:47,690 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;@347f0502, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 22:08:47,690 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-21 22:08:47,693 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 22:08:47,695 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 22:08:47,695 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 22:08:47,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:47,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 22:08:47,697 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)] === [2024-06-21 22:08:47,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:47,701 INFO L85 PathProgramCache]: Analyzing trace with hash 320515457, now seen corresponding path program 1 times [2024-06-21 22:08:47,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:47,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132155236] [2024-06-21 22:08:47,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:47,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:47,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:48,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:48,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:48,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132155236] [2024-06-21 22:08:48,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132155236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:48,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:48,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 22:08:48,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75643959] [2024-06-21 22:08:48,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:48,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 22:08:48,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:48,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 22:08:48,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 22:08:48,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-21 22:08:48,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:48,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:48,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-21 22:08:48,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:48,823 INFO L124 PetriNetUnfolderBase]: 162/296 cut-off events. [2024-06-21 22:08:48,824 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-06-21 22:08:48,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 607 conditions, 296 events. 162/296 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1026 event pairs, 97 based on Foata normal form. 1/291 useless extension candidates. Maximal degree in co-relation 596. Up to 288 conditions per place. [2024-06-21 22:08:48,831 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 21 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2024-06-21 22:08:48,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 27 transitions, 111 flow [2024-06-21 22:08:48,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 22:08:48,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 22:08:48,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 47 transitions. [2024-06-21 22:08:48,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5402298850574713 [2024-06-21 22:08:48,845 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 48 flow. Second operand 3 states and 47 transitions. [2024-06-21 22:08:48,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 27 transitions, 111 flow [2024-06-21 22:08:48,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 27 transitions, 108 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-21 22:08:48,850 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 67 flow [2024-06-21 22:08:48,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2024-06-21 22:08:48,856 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 1 predicate places. [2024-06-21 22:08:48,856 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 67 flow [2024-06-21 22:08:48,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:48,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:48,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:48,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 22:08:48,857 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)] === [2024-06-21 22:08:48,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:48,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1221856444, now seen corresponding path program 1 times [2024-06-21 22:08:48,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:48,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723627279] [2024-06-21 22:08:48,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:48,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:48,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:49,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:49,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:49,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723627279] [2024-06-21 22:08:49,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723627279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:49,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:49,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 22:08:49,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987530244] [2024-06-21 22:08:49,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:49,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 22:08:49,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:49,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 22:08:49,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 22:08:49,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-21 22:08:49,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 67 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:49,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:49,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-21 22:08:49,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:49,470 INFO L124 PetriNetUnfolderBase]: 159/291 cut-off events. [2024-06-21 22:08:49,470 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2024-06-21 22:08:49,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 679 conditions, 291 events. 159/291 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 991 event pairs, 79 based on Foata normal form. 2/292 useless extension candidates. Maximal degree in co-relation 667. Up to 274 conditions per place. [2024-06-21 22:08:49,473 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 25 selfloop transitions, 5 changer transitions 0/33 dead transitions. [2024-06-21 22:08:49,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 33 transitions, 153 flow [2024-06-21 22:08:49,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 22:08:49,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 22:08:49,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 60 transitions. [2024-06-21 22:08:49,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5172413793103449 [2024-06-21 22:08:49,475 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 67 flow. Second operand 4 states and 60 transitions. [2024-06-21 22:08:49,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 33 transitions, 153 flow [2024-06-21 22:08:49,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 33 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 22:08:49,477 INFO L231 Difference]: Finished difference. Result has 32 places, 25 transitions, 91 flow [2024-06-21 22:08:49,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=91, PETRI_PLACES=32, PETRI_TRANSITIONS=25} [2024-06-21 22:08:49,478 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 4 predicate places. [2024-06-21 22:08:49,478 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions, 91 flow [2024-06-21 22:08:49,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:49,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:49,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:49,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 22:08:49,480 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 22:08:49,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:49,485 INFO L85 PathProgramCache]: Analyzing trace with hash 777156932, now seen corresponding path program 1 times [2024-06-21 22:08:49,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:49,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118580949] [2024-06-21 22:08:49,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:49,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:49,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:49,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:49,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:49,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118580949] [2024-06-21 22:08:49,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118580949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:49,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:49,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 22:08:49,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358007768] [2024-06-21 22:08:49,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:49,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 22:08:49,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:49,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 22:08:49,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 22:08:49,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-21 22:08:49,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 91 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:49,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:49,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-21 22:08:49,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:50,057 INFO L124 PetriNetUnfolderBase]: 153/281 cut-off events. [2024-06-21 22:08:50,058 INFO L125 PetriNetUnfolderBase]: For 171/171 co-relation queries the response was YES. [2024-06-21 22:08:50,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728 conditions, 281 events. 153/281 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 939 event pairs, 43 based on Foata normal form. 4/284 useless extension candidates. Maximal degree in co-relation 714. Up to 246 conditions per place. [2024-06-21 22:08:50,061 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 30 selfloop transitions, 7 changer transitions 0/40 dead transitions. [2024-06-21 22:08:50,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 40 transitions, 205 flow [2024-06-21 22:08:50,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 22:08:50,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 22:08:50,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 74 transitions. [2024-06-21 22:08:50,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5103448275862069 [2024-06-21 22:08:50,063 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 91 flow. Second operand 5 states and 74 transitions. [2024-06-21 22:08:50,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 40 transitions, 205 flow [2024-06-21 22:08:50,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 40 transitions, 196 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 22:08:50,065 INFO L231 Difference]: Finished difference. Result has 35 places, 27 transitions, 115 flow [2024-06-21 22:08:50,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=115, PETRI_PLACES=35, PETRI_TRANSITIONS=27} [2024-06-21 22:08:50,066 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 7 predicate places. [2024-06-21 22:08:50,066 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 27 transitions, 115 flow [2024-06-21 22:08:50,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:50,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:50,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:50,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 22:08:50,067 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)] === [2024-06-21 22:08:50,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:50,068 INFO L85 PathProgramCache]: Analyzing trace with hash 384194663, now seen corresponding path program 1 times [2024-06-21 22:08:50,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:50,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024659290] [2024-06-21 22:08:50,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:50,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:50,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:50,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:50,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:50,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024659290] [2024-06-21 22:08:50,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024659290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:50,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:50,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:08:50,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810435205] [2024-06-21 22:08:50,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:50,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:08:50,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:50,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:08:50,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:08:50,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-21 22:08:50,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 115 flow. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:50,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:50,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-21 22:08:50,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:51,097 INFO L124 PetriNetUnfolderBase]: 149/273 cut-off events. [2024-06-21 22:08:51,099 INFO L125 PetriNetUnfolderBase]: For 269/269 co-relation queries the response was YES. [2024-06-21 22:08:51,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 771 conditions, 273 events. 149/273 cut-off events. For 269/269 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 895 event pairs, 24 based on Foata normal form. 4/276 useless extension candidates. Maximal degree in co-relation 756. Up to 220 conditions per place. [2024-06-21 22:08:51,102 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 30 selfloop transitions, 8 changer transitions 0/41 dead transitions. [2024-06-21 22:08:51,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 41 transitions, 219 flow [2024-06-21 22:08:51,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:08:51,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:08:51,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 82 transitions. [2024-06-21 22:08:51,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47126436781609193 [2024-06-21 22:08:51,105 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 115 flow. Second operand 6 states and 82 transitions. [2024-06-21 22:08:51,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 41 transitions, 219 flow [2024-06-21 22:08:51,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 41 transitions, 204 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 22:08:51,107 INFO L231 Difference]: Finished difference. Result has 37 places, 26 transitions, 112 flow [2024-06-21 22:08:51,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=112, PETRI_PLACES=37, PETRI_TRANSITIONS=26} [2024-06-21 22:08:51,108 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 9 predicate places. [2024-06-21 22:08:51,108 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 26 transitions, 112 flow [2024-06-21 22:08:51,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:51,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:51,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:51,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 22:08:51,109 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)] === [2024-06-21 22:08:51,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:51,110 INFO L85 PathProgramCache]: Analyzing trace with hash -206677035, now seen corresponding path program 1 times [2024-06-21 22:08:51,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:51,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981090638] [2024-06-21 22:08:51,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:51,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:51,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:51,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:51,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:51,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981090638] [2024-06-21 22:08:51,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981090638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:51,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:51,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 22:08:51,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486838351] [2024-06-21 22:08:51,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:51,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 22:08:51,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:51,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 22:08:51,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 22:08:51,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:08:51,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 112 flow. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:51,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:51,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:08:51,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:51,838 INFO L124 PetriNetUnfolderBase]: 147/270 cut-off events. [2024-06-21 22:08:51,839 INFO L125 PetriNetUnfolderBase]: For 377/377 co-relation queries the response was YES. [2024-06-21 22:08:51,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 797 conditions, 270 events. 147/270 cut-off events. For 377/377 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 882 event pairs, 53 based on Foata normal form. 1/270 useless extension candidates. Maximal degree in co-relation 780. Up to 259 conditions per place. [2024-06-21 22:08:51,841 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 25 selfloop transitions, 6 changer transitions 0/33 dead transitions. [2024-06-21 22:08:51,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 33 transitions, 192 flow [2024-06-21 22:08:51,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 22:08:51,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 22:08:51,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 53 transitions. [2024-06-21 22:08:51,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36551724137931035 [2024-06-21 22:08:51,842 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 112 flow. Second operand 5 states and 53 transitions. [2024-06-21 22:08:51,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 33 transitions, 192 flow [2024-06-21 22:08:51,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 33 transitions, 172 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 22:08:51,845 INFO L231 Difference]: Finished difference. Result has 38 places, 28 transitions, 119 flow [2024-06-21 22:08:51,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=119, PETRI_PLACES=38, PETRI_TRANSITIONS=28} [2024-06-21 22:08:51,846 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 10 predicate places. [2024-06-21 22:08:51,846 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 28 transitions, 119 flow [2024-06-21 22:08:51,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:51,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:51,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:51,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 22:08:51,847 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)] === [2024-06-21 22:08:51,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:51,848 INFO L85 PathProgramCache]: Analyzing trace with hash -2112020171, now seen corresponding path program 1 times [2024-06-21 22:08:51,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:51,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009937749] [2024-06-21 22:08:51,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:51,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:51,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:52,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:52,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:52,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009937749] [2024-06-21 22:08:52,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009937749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:52,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:52,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:08:52,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178558611] [2024-06-21 22:08:52,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:52,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:08:52,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:52,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:08:52,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:08:52,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:08:52,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 28 transitions, 119 flow. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 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) [2024-06-21 22:08:52,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:52,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:08:52,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:52,552 INFO L124 PetriNetUnfolderBase]: 149/275 cut-off events. [2024-06-21 22:08:52,552 INFO L125 PetriNetUnfolderBase]: For 498/501 co-relation queries the response was YES. [2024-06-21 22:08:52,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 841 conditions, 275 events. 149/275 cut-off events. For 498/501 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 921 event pairs, 52 based on Foata normal form. 4/277 useless extension candidates. Maximal degree in co-relation 822. Up to 237 conditions per place. [2024-06-21 22:08:52,554 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 27 selfloop transitions, 12 changer transitions 0/41 dead transitions. [2024-06-21 22:08:52,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 245 flow [2024-06-21 22:08:52,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:08:52,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:08:52,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 66 transitions. [2024-06-21 22:08:52,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-21 22:08:52,556 INFO L175 Difference]: Start difference. First operand has 38 places, 28 transitions, 119 flow. Second operand 6 states and 66 transitions. [2024-06-21 22:08:52,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 245 flow [2024-06-21 22:08:52,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 234 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-21 22:08:52,558 INFO L231 Difference]: Finished difference. Result has 42 places, 34 transitions, 176 flow [2024-06-21 22:08:52,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=176, PETRI_PLACES=42, PETRI_TRANSITIONS=34} [2024-06-21 22:08:52,559 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 14 predicate places. [2024-06-21 22:08:52,559 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 34 transitions, 176 flow [2024-06-21 22:08:52,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 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) [2024-06-21 22:08:52,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:52,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:52,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 22:08:52,560 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)] === [2024-06-21 22:08:52,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:52,561 INFO L85 PathProgramCache]: Analyzing trace with hash 974479412, now seen corresponding path program 1 times [2024-06-21 22:08:52,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:52,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316700595] [2024-06-21 22:08:52,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:52,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:52,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:53,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:53,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:53,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316700595] [2024-06-21 22:08:53,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316700595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:53,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:53,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:08:53,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369867162] [2024-06-21 22:08:53,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:53,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:08:53,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:53,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:08:53,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:08:53,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:08:53,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 34 transitions, 176 flow. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 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) [2024-06-21 22:08:53,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:53,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:08:53,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:53,226 INFO L124 PetriNetUnfolderBase]: 156/287 cut-off events. [2024-06-21 22:08:53,226 INFO L125 PetriNetUnfolderBase]: For 702/702 co-relation queries the response was YES. [2024-06-21 22:08:53,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1010 conditions, 287 events. 156/287 cut-off events. For 702/702 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 964 event pairs, 51 based on Foata normal form. 1/287 useless extension candidates. Maximal degree in co-relation 989. Up to 264 conditions per place. [2024-06-21 22:08:53,229 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 36 selfloop transitions, 11 changer transitions 0/49 dead transitions. [2024-06-21 22:08:53,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 49 transitions, 328 flow [2024-06-21 22:08:53,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:08:53,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:08:53,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 73 transitions. [2024-06-21 22:08:53,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35960591133004927 [2024-06-21 22:08:53,231 INFO L175 Difference]: Start difference. First operand has 42 places, 34 transitions, 176 flow. Second operand 7 states and 73 transitions. [2024-06-21 22:08:53,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 49 transitions, 328 flow [2024-06-21 22:08:53,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 49 transitions, 314 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 22:08:53,234 INFO L231 Difference]: Finished difference. Result has 48 places, 39 transitions, 231 flow [2024-06-21 22:08:53,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=231, PETRI_PLACES=48, PETRI_TRANSITIONS=39} [2024-06-21 22:08:53,234 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 20 predicate places. [2024-06-21 22:08:53,235 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 39 transitions, 231 flow [2024-06-21 22:08:53,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 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) [2024-06-21 22:08:53,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:53,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:53,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 22:08:53,235 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)] === [2024-06-21 22:08:53,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:53,236 INFO L85 PathProgramCache]: Analyzing trace with hash -374570946, now seen corresponding path program 2 times [2024-06-21 22:08:53,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:53,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945680745] [2024-06-21 22:08:53,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:53,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:53,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:53,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:53,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:53,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945680745] [2024-06-21 22:08:53,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945680745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:53,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:53,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:08:53,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670196784] [2024-06-21 22:08:53,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:53,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:08:53,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:53,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:08:53,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:08:53,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:08:53,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 39 transitions, 231 flow. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 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) [2024-06-21 22:08:53,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:53,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:08:53,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:53,910 INFO L124 PetriNetUnfolderBase]: 159/292 cut-off events. [2024-06-21 22:08:53,913 INFO L125 PetriNetUnfolderBase]: For 952/952 co-relation queries the response was YES. [2024-06-21 22:08:53,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1110 conditions, 292 events. 159/292 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 987 event pairs, 50 based on Foata normal form. 1/292 useless extension candidates. Maximal degree in co-relation 1086. Up to 266 conditions per place. [2024-06-21 22:08:53,917 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 35 selfloop transitions, 12 changer transitions 0/49 dead transitions. [2024-06-21 22:08:53,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 49 transitions, 366 flow [2024-06-21 22:08:53,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:08:53,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:08:53,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 64 transitions. [2024-06-21 22:08:53,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.367816091954023 [2024-06-21 22:08:53,921 INFO L175 Difference]: Start difference. First operand has 48 places, 39 transitions, 231 flow. Second operand 6 states and 64 transitions. [2024-06-21 22:08:53,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 49 transitions, 366 flow [2024-06-21 22:08:53,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 49 transitions, 345 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 22:08:53,924 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 265 flow [2024-06-21 22:08:53,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=265, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2024-06-21 22:08:53,927 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 22 predicate places. [2024-06-21 22:08:53,927 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 265 flow [2024-06-21 22:08:53,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 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) [2024-06-21 22:08:53,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:53,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:53,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 22:08:53,928 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)] === [2024-06-21 22:08:53,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:53,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1048123148, now seen corresponding path program 3 times [2024-06-21 22:08:53,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:53,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636724428] [2024-06-21 22:08:53,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:53,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:53,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:54,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:54,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:54,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636724428] [2024-06-21 22:08:54,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636724428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:54,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:54,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:08:54,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263054971] [2024-06-21 22:08:54,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:54,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:08:54,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:54,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:08:54,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:08:54,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:08:54,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 265 flow. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 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) [2024-06-21 22:08:54,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:54,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:08:54,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:54,553 INFO L124 PetriNetUnfolderBase]: 154/285 cut-off events. [2024-06-21 22:08:54,554 INFO L125 PetriNetUnfolderBase]: For 1202/1205 co-relation queries the response was YES. [2024-06-21 22:08:54,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1106 conditions, 285 events. 154/285 cut-off events. For 1202/1205 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 964 event pairs, 53 based on Foata normal form. 4/286 useless extension candidates. Maximal degree in co-relation 1081. Up to 239 conditions per place. [2024-06-21 22:08:54,556 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 29 selfloop transitions, 16 changer transitions 0/47 dead transitions. [2024-06-21 22:08:54,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 47 transitions, 371 flow [2024-06-21 22:08:54,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:08:54,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:08:54,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 65 transitions. [2024-06-21 22:08:54,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3735632183908046 [2024-06-21 22:08:54,558 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 265 flow. Second operand 6 states and 65 transitions. [2024-06-21 22:08:54,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 47 transitions, 371 flow [2024-06-21 22:08:54,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 47 transitions, 341 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 22:08:54,562 INFO L231 Difference]: Finished difference. Result has 52 places, 41 transitions, 274 flow [2024-06-21 22:08:54,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=274, PETRI_PLACES=52, PETRI_TRANSITIONS=41} [2024-06-21 22:08:54,563 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 24 predicate places. [2024-06-21 22:08:54,563 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 41 transitions, 274 flow [2024-06-21 22:08:54,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 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) [2024-06-21 22:08:54,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:54,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:54,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 22:08:54,564 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)] === [2024-06-21 22:08:54,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:54,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1048115212, now seen corresponding path program 1 times [2024-06-21 22:08:54,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:54,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841753881] [2024-06-21 22:08:54,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:54,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:54,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:55,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:55,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:55,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841753881] [2024-06-21 22:08:55,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841753881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:55,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:55,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:08:55,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628319419] [2024-06-21 22:08:55,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:55,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:08:55,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:55,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:08:55,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:08:55,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:08:55,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 41 transitions, 274 flow. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:55,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:55,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:08:55,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:55,424 INFO L124 PetriNetUnfolderBase]: 173/318 cut-off events. [2024-06-21 22:08:55,424 INFO L125 PetriNetUnfolderBase]: For 1245/1245 co-relation queries the response was YES. [2024-06-21 22:08:55,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1200 conditions, 318 events. 173/318 cut-off events. For 1245/1245 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1108 event pairs, 38 based on Foata normal form. 4/317 useless extension candidates. Maximal degree in co-relation 1174. Up to 192 conditions per place. [2024-06-21 22:08:55,427 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 38 selfloop transitions, 23 changer transitions 0/63 dead transitions. [2024-06-21 22:08:55,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 63 transitions, 500 flow [2024-06-21 22:08:55,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:08:55,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:08:55,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2024-06-21 22:08:55,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2024-06-21 22:08:55,429 INFO L175 Difference]: Start difference. First operand has 52 places, 41 transitions, 274 flow. Second operand 7 states and 84 transitions. [2024-06-21 22:08:55,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 63 transitions, 500 flow [2024-06-21 22:08:55,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 63 transitions, 455 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 22:08:55,455 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 350 flow [2024-06-21 22:08:55,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=350, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2024-06-21 22:08:55,457 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 27 predicate places. [2024-06-21 22:08:55,459 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 350 flow [2024-06-21 22:08:55,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:55,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:55,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:55,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 22:08:55,463 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)] === [2024-06-21 22:08:55,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:55,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1858333738, now seen corresponding path program 1 times [2024-06-21 22:08:55,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:55,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493434972] [2024-06-21 22:08:55,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:55,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:55,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:55,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:55,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:55,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493434972] [2024-06-21 22:08:55,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493434972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:55,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:55,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:08:55,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68610383] [2024-06-21 22:08:55,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:55,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:08:55,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:55,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:08:55,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:08:55,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:08:55,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 350 flow. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:55,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:55,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:08:55,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:56,102 INFO L124 PetriNetUnfolderBase]: 183/334 cut-off events. [2024-06-21 22:08:56,102 INFO L125 PetriNetUnfolderBase]: For 1468/1468 co-relation queries the response was YES. [2024-06-21 22:08:56,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1413 conditions, 334 events. 183/334 cut-off events. For 1468/1468 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1180 event pairs, 33 based on Foata normal form. 2/335 useless extension candidates. Maximal degree in co-relation 1385. Up to 281 conditions per place. [2024-06-21 22:08:56,105 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 53 selfloop transitions, 17 changer transitions 0/72 dead transitions. [2024-06-21 22:08:56,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 72 transitions, 570 flow [2024-06-21 22:08:56,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:08:56,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:08:56,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 86 transitions. [2024-06-21 22:08:56,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3706896551724138 [2024-06-21 22:08:56,107 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 350 flow. Second operand 8 states and 86 transitions. [2024-06-21 22:08:56,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 72 transitions, 570 flow [2024-06-21 22:08:56,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 72 transitions, 546 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-21 22:08:56,113 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 421 flow [2024-06-21 22:08:56,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=421, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2024-06-21 22:08:56,114 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 35 predicate places. [2024-06-21 22:08:56,114 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 421 flow [2024-06-21 22:08:56,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:56,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:56,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:56,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 22:08:56,115 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)] === [2024-06-21 22:08:56,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:56,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1690785042, now seen corresponding path program 2 times [2024-06-21 22:08:56,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:56,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461301561] [2024-06-21 22:08:56,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:56,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:56,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:56,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:56,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:56,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461301561] [2024-06-21 22:08:56,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461301561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:56,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:56,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:08:56,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027983635] [2024-06-21 22:08:56,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:56,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:08:56,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:56,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:08:56,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:08:56,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:08:56,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 421 flow. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:56,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:56,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:08:56,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:56,867 INFO L124 PetriNetUnfolderBase]: 189/344 cut-off events. [2024-06-21 22:08:56,867 INFO L125 PetriNetUnfolderBase]: For 1876/1876 co-relation queries the response was YES. [2024-06-21 22:08:56,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1603 conditions, 344 events. 189/344 cut-off events. For 1876/1876 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1218 event pairs, 32 based on Foata normal form. 2/345 useless extension candidates. Maximal degree in co-relation 1571. Up to 285 conditions per place. [2024-06-21 22:08:56,870 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 52 selfloop transitions, 18 changer transitions 0/72 dead transitions. [2024-06-21 22:08:56,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 72 transitions, 625 flow [2024-06-21 22:08:56,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:08:56,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:08:56,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 77 transitions. [2024-06-21 22:08:56,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-21 22:08:56,872 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 421 flow. Second operand 7 states and 77 transitions. [2024-06-21 22:08:56,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 72 transitions, 625 flow [2024-06-21 22:08:56,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 72 transitions, 603 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 22:08:56,877 INFO L231 Difference]: Finished difference. Result has 67 places, 59 transitions, 467 flow [2024-06-21 22:08:56,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=467, PETRI_PLACES=67, PETRI_TRANSITIONS=59} [2024-06-21 22:08:56,878 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 39 predicate places. [2024-06-21 22:08:56,878 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 59 transitions, 467 flow [2024-06-21 22:08:56,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:56,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:56,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:56,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 22:08:56,879 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)] === [2024-06-21 22:08:56,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:56,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1273202994, now seen corresponding path program 3 times [2024-06-21 22:08:56,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:56,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884355497] [2024-06-21 22:08:56,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:56,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:56,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:57,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:57,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:57,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884355497] [2024-06-21 22:08:57,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884355497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:57,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:57,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:08:57,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76620161] [2024-06-21 22:08:57,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:57,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:08:57,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:57,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:08:57,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:08:57,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:08:57,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 59 transitions, 467 flow. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:57,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:57,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:08:57,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:57,608 INFO L124 PetriNetUnfolderBase]: 200/362 cut-off events. [2024-06-21 22:08:57,608 INFO L125 PetriNetUnfolderBase]: For 2422/2422 co-relation queries the response was YES. [2024-06-21 22:08:57,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1791 conditions, 362 events. 200/362 cut-off events. For 2422/2422 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1300 event pairs, 32 based on Foata normal form. 2/363 useless extension candidates. Maximal degree in co-relation 1758. Up to 285 conditions per place. [2024-06-21 22:08:57,611 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 52 selfloop transitions, 22 changer transitions 0/76 dead transitions. [2024-06-21 22:08:57,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 76 transitions, 731 flow [2024-06-21 22:08:57,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:08:57,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:08:57,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2024-06-21 22:08:57,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3842364532019704 [2024-06-21 22:08:57,613 INFO L175 Difference]: Start difference. First operand has 67 places, 59 transitions, 467 flow. Second operand 7 states and 78 transitions. [2024-06-21 22:08:57,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 76 transitions, 731 flow [2024-06-21 22:08:57,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 76 transitions, 679 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 22:08:57,619 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 519 flow [2024-06-21 22:08:57,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=519, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2024-06-21 22:08:57,620 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 41 predicate places. [2024-06-21 22:08:57,620 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 519 flow [2024-06-21 22:08:57,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:57,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:57,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:57,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 22:08:57,621 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)] === [2024-06-21 22:08:57,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:57,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1277844624, now seen corresponding path program 4 times [2024-06-21 22:08:57,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:57,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396140178] [2024-06-21 22:08:57,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:57,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:57,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:58,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:58,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:58,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396140178] [2024-06-21 22:08:58,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396140178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:58,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:58,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:08:58,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622034777] [2024-06-21 22:08:58,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:58,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:08:58,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:58,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:08:58,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:08:58,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:08:58,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 519 flow. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:58,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:58,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:08:58,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:58,342 INFO L124 PetriNetUnfolderBase]: 210/383 cut-off events. [2024-06-21 22:08:58,343 INFO L125 PetriNetUnfolderBase]: For 2673/2673 co-relation queries the response was YES. [2024-06-21 22:08:58,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1805 conditions, 383 events. 210/383 cut-off events. For 2673/2673 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1415 event pairs, 39 based on Foata normal form. 6/383 useless extension candidates. Maximal degree in co-relation 1771. Up to 193 conditions per place. [2024-06-21 22:08:58,346 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 49 selfloop transitions, 31 changer transitions 0/82 dead transitions. [2024-06-21 22:08:58,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 82 transitions, 803 flow [2024-06-21 22:08:58,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:08:58,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:08:58,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2024-06-21 22:08:58,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236453201970443 [2024-06-21 22:08:58,348 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 519 flow. Second operand 7 states and 86 transitions. [2024-06-21 22:08:58,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 82 transitions, 803 flow [2024-06-21 22:08:58,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 82 transitions, 781 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 22:08:58,357 INFO L231 Difference]: Finished difference. Result has 74 places, 70 transitions, 621 flow [2024-06-21 22:08:58,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=621, PETRI_PLACES=74, PETRI_TRANSITIONS=70} [2024-06-21 22:08:58,359 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 46 predicate places. [2024-06-21 22:08:58,359 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 70 transitions, 621 flow [2024-06-21 22:08:58,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:58,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:58,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:58,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 22:08:58,360 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)] === [2024-06-21 22:08:58,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:58,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1868167476, now seen corresponding path program 1 times [2024-06-21 22:08:58,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:58,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849137090] [2024-06-21 22:08:58,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:58,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:58,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:59,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:59,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:59,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849137090] [2024-06-21 22:08:59,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849137090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:59,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:59,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:08:59,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591450791] [2024-06-21 22:08:59,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:59,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:08:59,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:59,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:08:59,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:08:59,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:08:59,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 70 transitions, 621 flow. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:59,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:59,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:08:59,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:59,356 INFO L124 PetriNetUnfolderBase]: 230/435 cut-off events. [2024-06-21 22:08:59,356 INFO L125 PetriNetUnfolderBase]: For 3516/3516 co-relation queries the response was YES. [2024-06-21 22:08:59,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2102 conditions, 435 events. 230/435 cut-off events. For 3516/3516 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1712 event pairs, 42 based on Foata normal form. 14/443 useless extension candidates. Maximal degree in co-relation 2065. Up to 209 conditions per place. [2024-06-21 22:08:59,360 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 52 selfloop transitions, 35 changer transitions 0/89 dead transitions. [2024-06-21 22:08:59,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 89 transitions, 921 flow [2024-06-21 22:08:59,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:08:59,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:08:59,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 96 transitions. [2024-06-21 22:08:59,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2024-06-21 22:08:59,362 INFO L175 Difference]: Start difference. First operand has 74 places, 70 transitions, 621 flow. Second operand 8 states and 96 transitions. [2024-06-21 22:08:59,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 89 transitions, 921 flow [2024-06-21 22:08:59,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 89 transitions, 878 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 22:08:59,371 INFO L231 Difference]: Finished difference. Result has 79 places, 71 transitions, 666 flow [2024-06-21 22:08:59,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=666, PETRI_PLACES=79, PETRI_TRANSITIONS=71} [2024-06-21 22:08:59,371 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 51 predicate places. [2024-06-21 22:08:59,371 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 71 transitions, 666 flow [2024-06-21 22:08:59,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:59,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:59,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:59,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 22:08:59,372 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)] === [2024-06-21 22:08:59,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:59,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1379521269, now seen corresponding path program 1 times [2024-06-21 22:08:59,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:59,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317678191] [2024-06-21 22:08:59,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:59,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:59,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:00,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:00,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:00,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317678191] [2024-06-21 22:09:00,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317678191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:00,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:00,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:09:00,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001027058] [2024-06-21 22:09:00,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:00,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:09:00,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:00,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:09:00,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:09:00,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:00,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 71 transitions, 666 flow. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:00,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:00,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:00,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:00,305 INFO L124 PetriNetUnfolderBase]: 237/445 cut-off events. [2024-06-21 22:09:00,306 INFO L125 PetriNetUnfolderBase]: For 2952/2952 co-relation queries the response was YES. [2024-06-21 22:09:00,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2241 conditions, 445 events. 237/445 cut-off events. For 2952/2952 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1781 event pairs, 44 based on Foata normal form. 1/445 useless extension candidates. Maximal degree in co-relation 2203. Up to 386 conditions per place. [2024-06-21 22:09:00,310 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 68 selfloop transitions, 20 changer transitions 0/90 dead transitions. [2024-06-21 22:09:00,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 90 transitions, 942 flow [2024-06-21 22:09:00,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:09:00,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:09:00,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2024-06-21 22:09:00,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 22:09:00,312 INFO L175 Difference]: Start difference. First operand has 79 places, 71 transitions, 666 flow. Second operand 8 states and 87 transitions. [2024-06-21 22:09:00,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 90 transitions, 942 flow [2024-06-21 22:09:00,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 90 transitions, 856 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 22:09:00,322 INFO L231 Difference]: Finished difference. Result has 82 places, 76 transitions, 697 flow [2024-06-21 22:09:00,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=697, PETRI_PLACES=82, PETRI_TRANSITIONS=76} [2024-06-21 22:09:00,322 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 54 predicate places. [2024-06-21 22:09:00,322 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 76 transitions, 697 flow [2024-06-21 22:09:00,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:00,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:00,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:00,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 22:09:00,323 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)] === [2024-06-21 22:09:00,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:00,324 INFO L85 PathProgramCache]: Analyzing trace with hash -2022917237, now seen corresponding path program 2 times [2024-06-21 22:09:00,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:00,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197020407] [2024-06-21 22:09:00,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:00,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:00,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:01,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:01,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:01,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197020407] [2024-06-21 22:09:01,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197020407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:01,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:01,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:09:01,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947349964] [2024-06-21 22:09:01,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:01,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:09:01,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:01,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:09:01,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:09:01,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:01,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 76 transitions, 697 flow. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:01,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:01,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:01,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:01,503 INFO L124 PetriNetUnfolderBase]: 254/474 cut-off events. [2024-06-21 22:09:01,503 INFO L125 PetriNetUnfolderBase]: For 3310/3310 co-relation queries the response was YES. [2024-06-21 22:09:01,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2389 conditions, 474 events. 254/474 cut-off events. For 3310/3310 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1933 event pairs, 51 based on Foata normal form. 1/471 useless extension candidates. Maximal degree in co-relation 2349. Up to 408 conditions per place. [2024-06-21 22:09:01,507 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 71 selfloop transitions, 25 changer transitions 0/98 dead transitions. [2024-06-21 22:09:01,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 98 transitions, 1060 flow [2024-06-21 22:09:01,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:09:01,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:09:01,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 85 transitions. [2024-06-21 22:09:01,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36637931034482757 [2024-06-21 22:09:01,509 INFO L175 Difference]: Start difference. First operand has 82 places, 76 transitions, 697 flow. Second operand 8 states and 85 transitions. [2024-06-21 22:09:01,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 98 transitions, 1060 flow [2024-06-21 22:09:01,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 98 transitions, 1010 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 22:09:01,519 INFO L231 Difference]: Finished difference. Result has 88 places, 87 transitions, 874 flow [2024-06-21 22:09:01,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=874, PETRI_PLACES=88, PETRI_TRANSITIONS=87} [2024-06-21 22:09:01,520 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 60 predicate places. [2024-06-21 22:09:01,520 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 87 transitions, 874 flow [2024-06-21 22:09:01,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:01,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:01,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:01,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 22:09:01,521 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)] === [2024-06-21 22:09:01,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:01,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1799688582, now seen corresponding path program 1 times [2024-06-21 22:09:01,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:01,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873870379] [2024-06-21 22:09:01,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:01,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:01,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:01,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:01,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:01,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873870379] [2024-06-21 22:09:01,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873870379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:01,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:01,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:09:01,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862920003] [2024-06-21 22:09:01,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:01,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:09:01,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:01,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:09:01,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:09:02,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:02,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 87 transitions, 874 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:02,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:02,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:02,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:02,226 INFO L124 PetriNetUnfolderBase]: 260/484 cut-off events. [2024-06-21 22:09:02,226 INFO L125 PetriNetUnfolderBase]: For 3892/3892 co-relation queries the response was YES. [2024-06-21 22:09:02,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2509 conditions, 484 events. 260/484 cut-off events. For 3892/3892 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1996 event pairs, 54 based on Foata normal form. 2/483 useless extension candidates. Maximal degree in co-relation 2465. Up to 413 conditions per place. [2024-06-21 22:09:02,231 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 74 selfloop transitions, 24 changer transitions 1/101 dead transitions. [2024-06-21 22:09:02,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 101 transitions, 1125 flow [2024-06-21 22:09:02,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:09:02,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:09:02,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 85 transitions. [2024-06-21 22:09:02,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36637931034482757 [2024-06-21 22:09:02,232 INFO L175 Difference]: Start difference. First operand has 88 places, 87 transitions, 874 flow. Second operand 8 states and 85 transitions. [2024-06-21 22:09:02,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 101 transitions, 1125 flow [2024-06-21 22:09:02,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 101 transitions, 1093 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-21 22:09:02,246 INFO L231 Difference]: Finished difference. Result has 94 places, 88 transitions, 906 flow [2024-06-21 22:09:02,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=842, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=906, PETRI_PLACES=94, PETRI_TRANSITIONS=88} [2024-06-21 22:09:02,246 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 66 predicate places. [2024-06-21 22:09:02,247 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 88 transitions, 906 flow [2024-06-21 22:09:02,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:02,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:02,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:02,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 22:09:02,250 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)] === [2024-06-21 22:09:02,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:02,250 INFO L85 PathProgramCache]: Analyzing trace with hash 168048979, now seen corresponding path program 3 times [2024-06-21 22:09:02,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:02,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059552703] [2024-06-21 22:09:02,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:02,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:02,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:02,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:02,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:02,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059552703] [2024-06-21 22:09:02,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059552703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:02,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:02,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:09:02,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849753469] [2024-06-21 22:09:02,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:02,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:09:02,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:02,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:09:02,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:09:03,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:03,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 88 transitions, 906 flow. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:03,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:03,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:03,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:03,311 INFO L124 PetriNetUnfolderBase]: 254/477 cut-off events. [2024-06-21 22:09:03,311 INFO L125 PetriNetUnfolderBase]: For 4140/4140 co-relation queries the response was YES. [2024-06-21 22:09:03,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2500 conditions, 477 events. 254/477 cut-off events. For 4140/4140 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1984 event pairs, 46 based on Foata normal form. 1/477 useless extension candidates. Maximal degree in co-relation 2454. Up to 411 conditions per place. [2024-06-21 22:09:03,315 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 74 selfloop transitions, 25 changer transitions 0/101 dead transitions. [2024-06-21 22:09:03,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 101 transitions, 1147 flow [2024-06-21 22:09:03,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:09:03,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:09:03,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 88 transitions. [2024-06-21 22:09:03,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-21 22:09:03,321 INFO L175 Difference]: Start difference. First operand has 94 places, 88 transitions, 906 flow. Second operand 8 states and 88 transitions. [2024-06-21 22:09:03,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 101 transitions, 1147 flow [2024-06-21 22:09:03,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 101 transitions, 1093 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 22:09:03,336 INFO L231 Difference]: Finished difference. Result has 96 places, 88 transitions, 912 flow [2024-06-21 22:09:03,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=912, PETRI_PLACES=96, PETRI_TRANSITIONS=88} [2024-06-21 22:09:03,336 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 68 predicate places. [2024-06-21 22:09:03,337 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 88 transitions, 912 flow [2024-06-21 22:09:03,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:03,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:03,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:03,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 22:09:03,337 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)] === [2024-06-21 22:09:03,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:03,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1589845070, now seen corresponding path program 2 times [2024-06-21 22:09:03,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:03,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941830280] [2024-06-21 22:09:03,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:03,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:03,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:03,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:03,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:03,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941830280] [2024-06-21 22:09:03,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941830280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:03,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:03,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:09:03,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901702777] [2024-06-21 22:09:03,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:03,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:09:03,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:03,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:09:03,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:09:03,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:03,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 88 transitions, 912 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:03,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:03,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:03,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:04,022 INFO L124 PetriNetUnfolderBase]: 260/488 cut-off events. [2024-06-21 22:09:04,022 INFO L125 PetriNetUnfolderBase]: For 4795/4795 co-relation queries the response was YES. [2024-06-21 22:09:04,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2570 conditions, 488 events. 260/488 cut-off events. For 4795/4795 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2036 event pairs, 52 based on Foata normal form. 2/486 useless extension candidates. Maximal degree in co-relation 2523. Up to 392 conditions per place. [2024-06-21 22:09:04,026 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 69 selfloop transitions, 28 changer transitions 1/100 dead transitions. [2024-06-21 22:09:04,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 100 transitions, 1159 flow [2024-06-21 22:09:04,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:09:04,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:09:04,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 76 transitions. [2024-06-21 22:09:04,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37438423645320196 [2024-06-21 22:09:04,027 INFO L175 Difference]: Start difference. First operand has 96 places, 88 transitions, 912 flow. Second operand 7 states and 76 transitions. [2024-06-21 22:09:04,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 100 transitions, 1159 flow [2024-06-21 22:09:04,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 100 transitions, 1072 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 22:09:04,041 INFO L231 Difference]: Finished difference. Result has 96 places, 89 transitions, 902 flow [2024-06-21 22:09:04,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=902, PETRI_PLACES=96, PETRI_TRANSITIONS=89} [2024-06-21 22:09:04,042 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 68 predicate places. [2024-06-21 22:09:04,042 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 89 transitions, 902 flow [2024-06-21 22:09:04,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:04,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:04,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:04,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 22:09:04,043 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)] === [2024-06-21 22:09:04,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:04,044 INFO L85 PathProgramCache]: Analyzing trace with hash 975327264, now seen corresponding path program 3 times [2024-06-21 22:09:04,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:04,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326769891] [2024-06-21 22:09:04,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:04,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:04,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:04,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:04,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:04,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326769891] [2024-06-21 22:09:04,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326769891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:04,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:04,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:09:04,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008874079] [2024-06-21 22:09:04,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:04,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:09:04,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:04,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:09:04,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:09:04,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:04,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 89 transitions, 902 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:04,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:04,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:04,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:04,757 INFO L124 PetriNetUnfolderBase]: 258/487 cut-off events. [2024-06-21 22:09:04,757 INFO L125 PetriNetUnfolderBase]: For 5301/5301 co-relation queries the response was YES. [2024-06-21 22:09:04,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2547 conditions, 487 events. 258/487 cut-off events. For 5301/5301 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2039 event pairs, 54 based on Foata normal form. 4/487 useless extension candidates. Maximal degree in co-relation 2501. Up to 259 conditions per place. [2024-06-21 22:09:04,762 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 48 selfloop transitions, 51 changer transitions 1/102 dead transitions. [2024-06-21 22:09:04,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 102 transitions, 1233 flow [2024-06-21 22:09:04,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:09:04,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:09:04,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 85 transitions. [2024-06-21 22:09:04,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4187192118226601 [2024-06-21 22:09:04,763 INFO L175 Difference]: Start difference. First operand has 96 places, 89 transitions, 902 flow. Second operand 7 states and 85 transitions. [2024-06-21 22:09:04,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 102 transitions, 1233 flow [2024-06-21 22:09:04,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 102 transitions, 1166 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 22:09:04,784 INFO L231 Difference]: Finished difference. Result has 98 places, 90 transitions, 964 flow [2024-06-21 22:09:04,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=843, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=964, PETRI_PLACES=98, PETRI_TRANSITIONS=90} [2024-06-21 22:09:04,784 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 70 predicate places. [2024-06-21 22:09:04,785 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 90 transitions, 964 flow [2024-06-21 22:09:04,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:04,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:04,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:04,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 22:09:04,786 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)] === [2024-06-21 22:09:04,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:04,786 INFO L85 PathProgramCache]: Analyzing trace with hash 171858414, now seen corresponding path program 4 times [2024-06-21 22:09:04,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:04,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578209371] [2024-06-21 22:09:04,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:04,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:04,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:05,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:05,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:05,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578209371] [2024-06-21 22:09:05,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578209371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:05,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:05,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:09:05,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458910788] [2024-06-21 22:09:05,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:05,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:09:05,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:05,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:09:05,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:09:05,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:05,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 90 transitions, 964 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:05,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:05,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:05,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:05,458 INFO L124 PetriNetUnfolderBase]: 253/480 cut-off events. [2024-06-21 22:09:05,458 INFO L125 PetriNetUnfolderBase]: For 4964/4964 co-relation queries the response was YES. [2024-06-21 22:09:05,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2582 conditions, 480 events. 253/480 cut-off events. For 4964/4964 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2027 event pairs, 56 based on Foata normal form. 2/478 useless extension candidates. Maximal degree in co-relation 2535. Up to 257 conditions per place. [2024-06-21 22:09:05,463 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 54 selfloop transitions, 45 changer transitions 1/102 dead transitions. [2024-06-21 22:09:05,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 102 transitions, 1257 flow [2024-06-21 22:09:05,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:09:05,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:09:05,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2024-06-21 22:09:05,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4039408866995074 [2024-06-21 22:09:05,464 INFO L175 Difference]: Start difference. First operand has 98 places, 90 transitions, 964 flow. Second operand 7 states and 82 transitions. [2024-06-21 22:09:05,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 102 transitions, 1257 flow [2024-06-21 22:09:05,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 102 transitions, 1142 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 22:09:05,480 INFO L231 Difference]: Finished difference. Result has 100 places, 91 transitions, 958 flow [2024-06-21 22:09:05,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=851, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=958, PETRI_PLACES=100, PETRI_TRANSITIONS=91} [2024-06-21 22:09:05,481 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 72 predicate places. [2024-06-21 22:09:05,481 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 91 transitions, 958 flow [2024-06-21 22:09:05,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:05,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:05,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:05,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 22:09:05,482 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)] === [2024-06-21 22:09:05,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:05,483 INFO L85 PathProgramCache]: Analyzing trace with hash 2078340789, now seen corresponding path program 1 times [2024-06-21 22:09:05,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:05,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109328134] [2024-06-21 22:09:05,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:05,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:05,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:06,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:06,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:06,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109328134] [2024-06-21 22:09:06,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109328134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:06,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:06,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:09:06,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063505080] [2024-06-21 22:09:06,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:06,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:09:06,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:06,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:09:06,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:09:06,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:06,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 91 transitions, 958 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:06,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:06,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:06,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:06,267 INFO L124 PetriNetUnfolderBase]: 245/470 cut-off events. [2024-06-21 22:09:06,267 INFO L125 PetriNetUnfolderBase]: For 5059/5059 co-relation queries the response was YES. [2024-06-21 22:09:06,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2557 conditions, 470 events. 245/470 cut-off events. For 5059/5059 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1998 event pairs, 80 based on Foata normal form. 1/469 useless extension candidates. Maximal degree in co-relation 2509. Up to 418 conditions per place. [2024-06-21 22:09:06,271 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 78 selfloop transitions, 19 changer transitions 0/99 dead transitions. [2024-06-21 22:09:06,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 99 transitions, 1189 flow [2024-06-21 22:09:06,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:09:06,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:09:06,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 73 transitions. [2024-06-21 22:09:06,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35960591133004927 [2024-06-21 22:09:06,273 INFO L175 Difference]: Start difference. First operand has 100 places, 91 transitions, 958 flow. Second operand 7 states and 73 transitions. [2024-06-21 22:09:06,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 99 transitions, 1189 flow [2024-06-21 22:09:06,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 99 transitions, 1125 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 22:09:06,290 INFO L231 Difference]: Finished difference. Result has 103 places, 93 transitions, 964 flow [2024-06-21 22:09:06,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=896, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=964, PETRI_PLACES=103, PETRI_TRANSITIONS=93} [2024-06-21 22:09:06,291 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 75 predicate places. [2024-06-21 22:09:06,291 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 93 transitions, 964 flow [2024-06-21 22:09:06,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:06,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:06,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:06,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 22:09:06,292 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)] === [2024-06-21 22:09:06,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:06,293 INFO L85 PathProgramCache]: Analyzing trace with hash 958693345, now seen corresponding path program 2 times [2024-06-21 22:09:06,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:06,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516831600] [2024-06-21 22:09:06,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:06,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:06,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:06,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:06,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:06,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516831600] [2024-06-21 22:09:06,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516831600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:06,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:06,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:09:06,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112470177] [2024-06-21 22:09:06,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:06,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:09:06,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:06,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:09:06,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:09:06,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:06,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 93 transitions, 964 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:06,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:06,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:06,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:07,111 INFO L124 PetriNetUnfolderBase]: 241/463 cut-off events. [2024-06-21 22:09:07,111 INFO L125 PetriNetUnfolderBase]: For 5159/5159 co-relation queries the response was YES. [2024-06-21 22:09:07,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2481 conditions, 463 events. 241/463 cut-off events. For 5159/5159 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1956 event pairs, 78 based on Foata normal form. 1/462 useless extension candidates. Maximal degree in co-relation 2432. Up to 402 conditions per place. [2024-06-21 22:09:07,116 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 76 selfloop transitions, 24 changer transitions 0/102 dead transitions. [2024-06-21 22:09:07,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 102 transitions, 1200 flow [2024-06-21 22:09:07,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:09:07,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:09:07,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 82 transitions. [2024-06-21 22:09:07,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35344827586206895 [2024-06-21 22:09:07,117 INFO L175 Difference]: Start difference. First operand has 103 places, 93 transitions, 964 flow. Second operand 8 states and 82 transitions. [2024-06-21 22:09:07,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 102 transitions, 1200 flow [2024-06-21 22:09:07,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 102 transitions, 1157 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 22:09:07,134 INFO L231 Difference]: Finished difference. Result has 107 places, 95 transitions, 1005 flow [2024-06-21 22:09:07,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1005, PETRI_PLACES=107, PETRI_TRANSITIONS=95} [2024-06-21 22:09:07,135 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 79 predicate places. [2024-06-21 22:09:07,135 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 95 transitions, 1005 flow [2024-06-21 22:09:07,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:07,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:07,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:07,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 22:09:07,136 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)] === [2024-06-21 22:09:07,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:07,136 INFO L85 PathProgramCache]: Analyzing trace with hash -411902797, now seen corresponding path program 1 times [2024-06-21 22:09:07,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:07,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467064707] [2024-06-21 22:09:07,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:07,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:07,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:07,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:07,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:07,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467064707] [2024-06-21 22:09:07,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467064707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:07,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:07,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:09:07,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826235384] [2024-06-21 22:09:07,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:07,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:09:07,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:07,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:09:07,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:09:07,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:07,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 95 transitions, 1005 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:07,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:07,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:07,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:08,045 INFO L124 PetriNetUnfolderBase]: 250/482 cut-off events. [2024-06-21 22:09:08,045 INFO L125 PetriNetUnfolderBase]: For 5709/5709 co-relation queries the response was YES. [2024-06-21 22:09:08,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2587 conditions, 482 events. 250/482 cut-off events. For 5709/5709 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2094 event pairs, 49 based on Foata normal form. 2/483 useless extension candidates. Maximal degree in co-relation 2536. Up to 384 conditions per place. [2024-06-21 22:09:08,052 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 87 selfloop transitions, 24 changer transitions 0/113 dead transitions. [2024-06-21 22:09:08,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 113 transitions, 1277 flow [2024-06-21 22:09:08,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:09:08,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:09:08,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 92 transitions. [2024-06-21 22:09:08,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3524904214559387 [2024-06-21 22:09:08,054 INFO L175 Difference]: Start difference. First operand has 107 places, 95 transitions, 1005 flow. Second operand 9 states and 92 transitions. [2024-06-21 22:09:08,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 113 transitions, 1277 flow [2024-06-21 22:09:08,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 113 transitions, 1227 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 22:09:08,074 INFO L231 Difference]: Finished difference. Result has 111 places, 97 transitions, 1019 flow [2024-06-21 22:09:08,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=955, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1019, PETRI_PLACES=111, PETRI_TRANSITIONS=97} [2024-06-21 22:09:08,074 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 83 predicate places. [2024-06-21 22:09:08,075 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 97 transitions, 1019 flow [2024-06-21 22:09:08,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:08,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:08,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:08,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 22:09:08,076 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)] === [2024-06-21 22:09:08,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:08,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1922814863, now seen corresponding path program 2 times [2024-06-21 22:09:08,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:08,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281338369] [2024-06-21 22:09:08,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:08,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:08,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:08,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:08,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:08,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281338369] [2024-06-21 22:09:08,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281338369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:08,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:08,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:09:08,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694115295] [2024-06-21 22:09:08,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:08,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:09:08,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:08,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:09:08,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:09:08,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:08,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 97 transitions, 1019 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:08,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:08,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:08,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:09,052 INFO L124 PetriNetUnfolderBase]: 259/501 cut-off events. [2024-06-21 22:09:09,052 INFO L125 PetriNetUnfolderBase]: For 5836/5836 co-relation queries the response was YES. [2024-06-21 22:09:09,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2658 conditions, 501 events. 259/501 cut-off events. For 5836/5836 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2225 event pairs, 73 based on Foata normal form. 2/502 useless extension candidates. Maximal degree in co-relation 2606. Up to 424 conditions per place. [2024-06-21 22:09:09,057 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 89 selfloop transitions, 24 changer transitions 0/115 dead transitions. [2024-06-21 22:09:09,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 115 transitions, 1301 flow [2024-06-21 22:09:09,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:09:09,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:09:09,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 95 transitions. [2024-06-21 22:09:09,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36398467432950193 [2024-06-21 22:09:09,059 INFO L175 Difference]: Start difference. First operand has 111 places, 97 transitions, 1019 flow. Second operand 9 states and 95 transitions. [2024-06-21 22:09:09,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 115 transitions, 1301 flow [2024-06-21 22:09:09,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 115 transitions, 1237 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 22:09:09,077 INFO L231 Difference]: Finished difference. Result has 114 places, 99 transitions, 1027 flow [2024-06-21 22:09:09,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=957, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1027, PETRI_PLACES=114, PETRI_TRANSITIONS=99} [2024-06-21 22:09:09,078 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 86 predicate places. [2024-06-21 22:09:09,078 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 99 transitions, 1027 flow [2024-06-21 22:09:09,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:09,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:09,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:09,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 22:09:09,079 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)] === [2024-06-21 22:09:09,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:09,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1179327957, now seen corresponding path program 3 times [2024-06-21 22:09:09,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:09,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942319241] [2024-06-21 22:09:09,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:09,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:09,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:09,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:09,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:09,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942319241] [2024-06-21 22:09:09,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942319241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:09,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:09,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:09:09,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632993857] [2024-06-21 22:09:09,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:09,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:09:09,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:09,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:09:09,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:09:09,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:09,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 99 transitions, 1027 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:09,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:09,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:09,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:10,102 INFO L124 PetriNetUnfolderBase]: 263/509 cut-off events. [2024-06-21 22:09:10,103 INFO L125 PetriNetUnfolderBase]: For 6364/6364 co-relation queries the response was YES. [2024-06-21 22:09:10,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2704 conditions, 509 events. 263/509 cut-off events. For 6364/6364 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2271 event pairs, 72 based on Foata normal form. 2/510 useless extension candidates. Maximal degree in co-relation 2651. Up to 433 conditions per place. [2024-06-21 22:09:10,113 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 86 selfloop transitions, 27 changer transitions 0/115 dead transitions. [2024-06-21 22:09:10,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 115 transitions, 1305 flow [2024-06-21 22:09:10,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:09:10,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:09:10,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 95 transitions. [2024-06-21 22:09:10,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36398467432950193 [2024-06-21 22:09:10,116 INFO L175 Difference]: Start difference. First operand has 114 places, 99 transitions, 1027 flow. Second operand 9 states and 95 transitions. [2024-06-21 22:09:10,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 115 transitions, 1305 flow [2024-06-21 22:09:10,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 115 transitions, 1255 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 22:09:10,138 INFO L231 Difference]: Finished difference. Result has 117 places, 100 transitions, 1048 flow [2024-06-21 22:09:10,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=977, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1048, PETRI_PLACES=117, PETRI_TRANSITIONS=100} [2024-06-21 22:09:10,139 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 89 predicate places. [2024-06-21 22:09:10,139 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 100 transitions, 1048 flow [2024-06-21 22:09:10,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:10,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:10,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:10,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 22:09:10,140 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)] === [2024-06-21 22:09:10,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:10,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1920937069, now seen corresponding path program 1 times [2024-06-21 22:09:10,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:10,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360314253] [2024-06-21 22:09:10,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:10,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:10,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:10,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:10,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:10,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360314253] [2024-06-21 22:09:10,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360314253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:10,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:10,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:09:10,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876331521] [2024-06-21 22:09:10,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:10,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:09:10,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:10,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:09:10,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:09:10,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:10,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 100 transitions, 1048 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:10,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:10,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:10,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:11,060 INFO L124 PetriNetUnfolderBase]: 266/515 cut-off events. [2024-06-21 22:09:11,060 INFO L125 PetriNetUnfolderBase]: For 6734/6734 co-relation queries the response was YES. [2024-06-21 22:09:11,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2764 conditions, 515 events. 266/515 cut-off events. For 6734/6734 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2279 event pairs, 75 based on Foata normal form. 1/513 useless extension candidates. Maximal degree in co-relation 2710. Up to 435 conditions per place. [2024-06-21 22:09:11,065 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 85 selfloop transitions, 26 changer transitions 1/114 dead transitions. [2024-06-21 22:09:11,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 114 transitions, 1334 flow [2024-06-21 22:09:11,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:09:11,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:09:11,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 86 transitions. [2024-06-21 22:09:11,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3706896551724138 [2024-06-21 22:09:11,066 INFO L175 Difference]: Start difference. First operand has 117 places, 100 transitions, 1048 flow. Second operand 8 states and 86 transitions. [2024-06-21 22:09:11,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 114 transitions, 1334 flow [2024-06-21 22:09:11,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 114 transitions, 1275 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 22:09:11,090 INFO L231 Difference]: Finished difference. Result has 118 places, 101 transitions, 1062 flow [2024-06-21 22:09:11,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1062, PETRI_PLACES=118, PETRI_TRANSITIONS=101} [2024-06-21 22:09:11,093 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 90 predicate places. [2024-06-21 22:09:11,094 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 101 transitions, 1062 flow [2024-06-21 22:09:11,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:11,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:11,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:11,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 22:09:11,094 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)] === [2024-06-21 22:09:11,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:11,095 INFO L85 PathProgramCache]: Analyzing trace with hash 914491097, now seen corresponding path program 4 times [2024-06-21 22:09:11,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:11,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143797126] [2024-06-21 22:09:11,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:11,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:11,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:11,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:11,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:11,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143797126] [2024-06-21 22:09:11,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143797126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:11,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:11,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:09:11,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369913305] [2024-06-21 22:09:11,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:11,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:09:11,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:11,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:09:11,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:09:11,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:11,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 101 transitions, 1062 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:11,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:11,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:11,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:12,147 INFO L124 PetriNetUnfolderBase]: 273/531 cut-off events. [2024-06-21 22:09:12,147 INFO L125 PetriNetUnfolderBase]: For 7392/7392 co-relation queries the response was YES. [2024-06-21 22:09:12,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2832 conditions, 531 events. 273/531 cut-off events. For 7392/7392 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2399 event pairs, 52 based on Foata normal form. 2/532 useless extension candidates. Maximal degree in co-relation 2777. Up to 454 conditions per place. [2024-06-21 22:09:12,153 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 94 selfloop transitions, 23 changer transitions 0/119 dead transitions. [2024-06-21 22:09:12,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 119 transitions, 1359 flow [2024-06-21 22:09:12,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:09:12,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:09:12,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-06-21 22:09:12,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.367816091954023 [2024-06-21 22:09:12,154 INFO L175 Difference]: Start difference. First operand has 118 places, 101 transitions, 1062 flow. Second operand 9 states and 96 transitions. [2024-06-21 22:09:12,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 119 transitions, 1359 flow [2024-06-21 22:09:12,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 119 transitions, 1309 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 22:09:12,178 INFO L231 Difference]: Finished difference. Result has 122 places, 103 transitions, 1086 flow [2024-06-21 22:09:12,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1012, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1086, PETRI_PLACES=122, PETRI_TRANSITIONS=103} [2024-06-21 22:09:12,181 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 94 predicate places. [2024-06-21 22:09:12,181 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 103 transitions, 1086 flow [2024-06-21 22:09:12,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:12,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:12,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:12,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 22:09:12,182 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)] === [2024-06-21 22:09:12,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:12,182 INFO L85 PathProgramCache]: Analyzing trace with hash -848684419, now seen corresponding path program 5 times [2024-06-21 22:09:12,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:12,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170743489] [2024-06-21 22:09:12,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:12,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:12,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:12,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:12,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:12,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170743489] [2024-06-21 22:09:12,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170743489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:12,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:12,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:09:12,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307177342] [2024-06-21 22:09:12,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:12,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:09:12,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:12,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:09:12,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:09:12,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:12,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 103 transitions, 1086 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:12,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:12,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:12,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:13,210 INFO L124 PetriNetUnfolderBase]: 277/539 cut-off events. [2024-06-21 22:09:13,210 INFO L125 PetriNetUnfolderBase]: For 8055/8055 co-relation queries the response was YES. [2024-06-21 22:09:13,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2910 conditions, 539 events. 277/539 cut-off events. For 8055/8055 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2456 event pairs, 52 based on Foata normal form. 2/540 useless extension candidates. Maximal degree in co-relation 2853. Up to 463 conditions per place. [2024-06-21 22:09:13,214 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 91 selfloop transitions, 26 changer transitions 0/119 dead transitions. [2024-06-21 22:09:13,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 119 transitions, 1379 flow [2024-06-21 22:09:13,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:09:13,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:09:13,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-06-21 22:09:13,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.367816091954023 [2024-06-21 22:09:13,215 INFO L175 Difference]: Start difference. First operand has 122 places, 103 transitions, 1086 flow. Second operand 9 states and 96 transitions. [2024-06-21 22:09:13,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 119 transitions, 1379 flow [2024-06-21 22:09:13,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 119 transitions, 1325 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 22:09:13,235 INFO L231 Difference]: Finished difference. Result has 125 places, 104 transitions, 1105 flow [2024-06-21 22:09:13,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1032, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1105, PETRI_PLACES=125, PETRI_TRANSITIONS=104} [2024-06-21 22:09:13,235 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 97 predicate places. [2024-06-21 22:09:13,235 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 104 transitions, 1105 flow [2024-06-21 22:09:13,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:13,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:13,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:13,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 22:09:13,236 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)] === [2024-06-21 22:09:13,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:13,236 INFO L85 PathProgramCache]: Analyzing trace with hash -846003105, now seen corresponding path program 2 times [2024-06-21 22:09:13,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:13,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494064311] [2024-06-21 22:09:13,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:13,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:13,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:13,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:13,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:13,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494064311] [2024-06-21 22:09:13,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494064311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:13,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:13,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:09:13,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530251387] [2024-06-21 22:09:13,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:13,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:09:13,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:13,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:09:13,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:09:13,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:13,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 104 transitions, 1105 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:13,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:13,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:13,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:14,143 INFO L124 PetriNetUnfolderBase]: 272/525 cut-off events. [2024-06-21 22:09:14,144 INFO L125 PetriNetUnfolderBase]: For 8003/8003 co-relation queries the response was YES. [2024-06-21 22:09:14,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2844 conditions, 525 events. 272/525 cut-off events. For 8003/8003 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2393 event pairs, 63 based on Foata normal form. 1/523 useless extension candidates. Maximal degree in co-relation 2786. Up to 410 conditions per place. [2024-06-21 22:09:14,148 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 75 selfloop transitions, 34 changer transitions 3/114 dead transitions. [2024-06-21 22:09:14,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 114 transitions, 1361 flow [2024-06-21 22:09:14,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:09:14,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:09:14,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 76 transitions. [2024-06-21 22:09:14,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37438423645320196 [2024-06-21 22:09:14,150 INFO L175 Difference]: Start difference. First operand has 125 places, 104 transitions, 1105 flow. Second operand 7 states and 76 transitions. [2024-06-21 22:09:14,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 114 transitions, 1361 flow [2024-06-21 22:09:14,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 114 transitions, 1298 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 22:09:14,176 INFO L231 Difference]: Finished difference. Result has 125 places, 101 transitions, 1085 flow [2024-06-21 22:09:14,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1042, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1085, PETRI_PLACES=125, PETRI_TRANSITIONS=101} [2024-06-21 22:09:14,176 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 97 predicate places. [2024-06-21 22:09:14,177 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 101 transitions, 1085 flow [2024-06-21 22:09:14,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:14,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:14,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:14,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 22:09:14,177 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)] === [2024-06-21 22:09:14,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:14,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1032639227, now seen corresponding path program 6 times [2024-06-21 22:09:14,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:14,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605602398] [2024-06-21 22:09:14,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:14,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:14,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:14,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:14,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:14,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605602398] [2024-06-21 22:09:14,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605602398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:14,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:14,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:09:14,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971284063] [2024-06-21 22:09:14,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:14,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:09:14,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:14,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:09:14,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:09:15,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:15,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 101 transitions, 1085 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:15,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:15,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:15,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:15,225 INFO L124 PetriNetUnfolderBase]: 265/508 cut-off events. [2024-06-21 22:09:15,225 INFO L125 PetriNetUnfolderBase]: For 8863/8863 co-relation queries the response was YES. [2024-06-21 22:09:15,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2846 conditions, 508 events. 265/508 cut-off events. For 8863/8863 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2290 event pairs, 48 based on Foata normal form. 2/509 useless extension candidates. Maximal degree in co-relation 2787. Up to 415 conditions per place. [2024-06-21 22:09:15,230 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 84 selfloop transitions, 33 changer transitions 0/119 dead transitions. [2024-06-21 22:09:15,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 119 transitions, 1400 flow [2024-06-21 22:09:15,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:09:15,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:09:15,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-06-21 22:09:15,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.367816091954023 [2024-06-21 22:09:15,233 INFO L175 Difference]: Start difference. First operand has 125 places, 101 transitions, 1085 flow. Second operand 9 states and 96 transitions. [2024-06-21 22:09:15,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 119 transitions, 1400 flow [2024-06-21 22:09:15,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 119 transitions, 1271 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 22:09:15,261 INFO L231 Difference]: Finished difference. Result has 126 places, 104 transitions, 1069 flow [2024-06-21 22:09:15,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=957, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1069, PETRI_PLACES=126, PETRI_TRANSITIONS=104} [2024-06-21 22:09:15,262 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 98 predicate places. [2024-06-21 22:09:15,262 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 104 transitions, 1069 flow [2024-06-21 22:09:15,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:15,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:15,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:15,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 22:09:15,263 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)] === [2024-06-21 22:09:15,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:15,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1233122841, now seen corresponding path program 7 times [2024-06-21 22:09:15,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:15,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478003970] [2024-06-21 22:09:15,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:15,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:15,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:15,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:15,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478003970] [2024-06-21 22:09:15,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478003970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:15,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:15,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:09:15,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536601307] [2024-06-21 22:09:15,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:15,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:09:15,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:15,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:09:15,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:09:15,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:15,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 104 transitions, 1069 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:15,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:15,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:15,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:16,212 INFO L124 PetriNetUnfolderBase]: 269/515 cut-off events. [2024-06-21 22:09:16,212 INFO L125 PetriNetUnfolderBase]: For 8470/8470 co-relation queries the response was YES. [2024-06-21 22:09:16,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2832 conditions, 515 events. 269/515 cut-off events. For 8470/8470 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2342 event pairs, 40 based on Foata normal form. 2/516 useless extension candidates. Maximal degree in co-relation 2772. Up to 379 conditions per place. [2024-06-21 22:09:16,216 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 88 selfloop transitions, 28 changer transitions 0/118 dead transitions. [2024-06-21 22:09:16,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 118 transitions, 1351 flow [2024-06-21 22:09:16,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:09:16,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:09:16,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 83 transitions. [2024-06-21 22:09:16,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3577586206896552 [2024-06-21 22:09:16,225 INFO L175 Difference]: Start difference. First operand has 126 places, 104 transitions, 1069 flow. Second operand 8 states and 83 transitions. [2024-06-21 22:09:16,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 118 transitions, 1351 flow [2024-06-21 22:09:16,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 118 transitions, 1276 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 22:09:16,248 INFO L231 Difference]: Finished difference. Result has 128 places, 105 transitions, 1080 flow [2024-06-21 22:09:16,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=994, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1080, PETRI_PLACES=128, PETRI_TRANSITIONS=105} [2024-06-21 22:09:16,249 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 100 predicate places. [2024-06-21 22:09:16,249 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 105 transitions, 1080 flow [2024-06-21 22:09:16,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:16,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:16,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:16,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 22:09:16,250 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)] === [2024-06-21 22:09:16,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:16,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1233183291, now seen corresponding path program 8 times [2024-06-21 22:09:16,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:16,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062856490] [2024-06-21 22:09:16,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:16,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:16,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:16,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:16,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:16,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062856490] [2024-06-21 22:09:16,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062856490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:16,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:16,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:09:16,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265873401] [2024-06-21 22:09:16,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:16,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:09:16,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:16,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:09:16,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:09:16,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:16,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 105 transitions, 1080 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:16,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:16,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:16,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:17,177 INFO L124 PetriNetUnfolderBase]: 273/523 cut-off events. [2024-06-21 22:09:17,177 INFO L125 PetriNetUnfolderBase]: For 9042/9042 co-relation queries the response was YES. [2024-06-21 22:09:17,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2904 conditions, 523 events. 273/523 cut-off events. For 9042/9042 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2394 event pairs, 57 based on Foata normal form. 2/524 useless extension candidates. Maximal degree in co-relation 2843. Up to 413 conditions per place. [2024-06-21 22:09:17,180 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 82 selfloop transitions, 35 changer transitions 0/119 dead transitions. [2024-06-21 22:09:17,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 119 transitions, 1370 flow [2024-06-21 22:09:17,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:09:17,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:09:17,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 85 transitions. [2024-06-21 22:09:17,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36637931034482757 [2024-06-21 22:09:17,181 INFO L175 Difference]: Start difference. First operand has 128 places, 105 transitions, 1080 flow. Second operand 8 states and 85 transitions. [2024-06-21 22:09:17,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 119 transitions, 1370 flow [2024-06-21 22:09:17,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 119 transitions, 1294 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 22:09:17,200 INFO L231 Difference]: Finished difference. Result has 130 places, 106 transitions, 1107 flow [2024-06-21 22:09:17,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1010, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1107, PETRI_PLACES=130, PETRI_TRANSITIONS=106} [2024-06-21 22:09:17,200 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 102 predicate places. [2024-06-21 22:09:17,201 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 106 transitions, 1107 flow [2024-06-21 22:09:17,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:17,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:17,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:17,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 22:09:17,201 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)] === [2024-06-21 22:09:17,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:17,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1351270971, now seen corresponding path program 9 times [2024-06-21 22:09:17,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:17,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254929668] [2024-06-21 22:09:17,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:17,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:17,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:17,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:17,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:17,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254929668] [2024-06-21 22:09:17,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254929668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:17,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:17,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:09:17,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820297727] [2024-06-21 22:09:17,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:17,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:09:17,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:17,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:09:17,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:09:17,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:17,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 106 transitions, 1107 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:17,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:17,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:17,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:18,126 INFO L124 PetriNetUnfolderBase]: 277/531 cut-off events. [2024-06-21 22:09:18,126 INFO L125 PetriNetUnfolderBase]: For 8025/8025 co-relation queries the response was YES. [2024-06-21 22:09:18,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2907 conditions, 531 events. 277/531 cut-off events. For 8025/8025 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2450 event pairs, 48 based on Foata normal form. 2/532 useless extension candidates. Maximal degree in co-relation 2845. Up to 415 conditions per place. [2024-06-21 22:09:18,130 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 78 selfloop transitions, 39 changer transitions 0/119 dead transitions. [2024-06-21 22:09:18,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 119 transitions, 1393 flow [2024-06-21 22:09:18,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:09:18,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:09:18,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 85 transitions. [2024-06-21 22:09:18,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36637931034482757 [2024-06-21 22:09:18,131 INFO L175 Difference]: Start difference. First operand has 130 places, 106 transitions, 1107 flow. Second operand 8 states and 85 transitions. [2024-06-21 22:09:18,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 119 transitions, 1393 flow [2024-06-21 22:09:18,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 119 transitions, 1312 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 22:09:18,148 INFO L231 Difference]: Finished difference. Result has 132 places, 107 transitions, 1128 flow [2024-06-21 22:09:18,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1030, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1128, PETRI_PLACES=132, PETRI_TRANSITIONS=107} [2024-06-21 22:09:18,148 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 104 predicate places. [2024-06-21 22:09:18,148 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 107 transitions, 1128 flow [2024-06-21 22:09:18,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:18,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:18,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:18,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 22:09:18,149 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)] === [2024-06-21 22:09:18,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:18,149 INFO L85 PathProgramCache]: Analyzing trace with hash 12329909, now seen corresponding path program 1 times [2024-06-21 22:09:18,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:18,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459491536] [2024-06-21 22:09:18,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:18,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:18,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:18,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:18,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:18,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459491536] [2024-06-21 22:09:18,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459491536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:18,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:18,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:09:18,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849632624] [2024-06-21 22:09:18,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:18,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:09:18,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:18,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:09:18,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:09:18,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:18,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 107 transitions, 1128 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:18,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:18,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:18,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:18,996 INFO L124 PetriNetUnfolderBase]: 281/540 cut-off events. [2024-06-21 22:09:18,996 INFO L125 PetriNetUnfolderBase]: For 7667/7667 co-relation queries the response was YES. [2024-06-21 22:09:18,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2925 conditions, 540 events. 281/540 cut-off events. For 7667/7667 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2504 event pairs, 77 based on Foata normal form. 2/539 useless extension candidates. Maximal degree in co-relation 2862. Up to 470 conditions per place. [2024-06-21 22:09:18,999 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 90 selfloop transitions, 25 changer transitions 0/117 dead transitions. [2024-06-21 22:09:18,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 117 transitions, 1390 flow [2024-06-21 22:09:19,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:09:19,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:09:19,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 90 transitions. [2024-06-21 22:09:19,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3448275862068966 [2024-06-21 22:09:19,001 INFO L175 Difference]: Start difference. First operand has 132 places, 107 transitions, 1128 flow. Second operand 9 states and 90 transitions. [2024-06-21 22:09:19,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 117 transitions, 1390 flow [2024-06-21 22:09:19,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 117 transitions, 1304 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 22:09:19,017 INFO L231 Difference]: Finished difference. Result has 135 places, 108 transitions, 1111 flow [2024-06-21 22:09:19,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1042, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1111, PETRI_PLACES=135, PETRI_TRANSITIONS=108} [2024-06-21 22:09:19,017 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 107 predicate places. [2024-06-21 22:09:19,017 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 108 transitions, 1111 flow [2024-06-21 22:09:19,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:19,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:19,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:19,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 22:09:19,018 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)] === [2024-06-21 22:09:19,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:19,018 INFO L85 PathProgramCache]: Analyzing trace with hash 12626579, now seen corresponding path program 2 times [2024-06-21 22:09:19,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:19,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493194788] [2024-06-21 22:09:19,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:19,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:19,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:19,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:19,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:19,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493194788] [2024-06-21 22:09:19,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493194788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:19,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:19,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:09:19,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128706625] [2024-06-21 22:09:19,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:19,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:09:19,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:19,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:09:19,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:09:19,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:19,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 108 transitions, 1111 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:19,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:19,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:19,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:19,774 INFO L124 PetriNetUnfolderBase]: 278/535 cut-off events. [2024-06-21 22:09:19,774 INFO L125 PetriNetUnfolderBase]: For 6782/6782 co-relation queries the response was YES. [2024-06-21 22:09:19,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2812 conditions, 535 events. 278/535 cut-off events. For 6782/6782 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2475 event pairs, 68 based on Foata normal form. 2/534 useless extension candidates. Maximal degree in co-relation 2748. Up to 445 conditions per place. [2024-06-21 22:09:19,778 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 91 selfloop transitions, 24 changer transitions 0/117 dead transitions. [2024-06-21 22:09:19,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 117 transitions, 1361 flow [2024-06-21 22:09:19,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:09:19,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:09:19,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 80 transitions. [2024-06-21 22:09:19,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3448275862068966 [2024-06-21 22:09:19,779 INFO L175 Difference]: Start difference. First operand has 135 places, 108 transitions, 1111 flow. Second operand 8 states and 80 transitions. [2024-06-21 22:09:19,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 117 transitions, 1361 flow [2024-06-21 22:09:19,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 117 transitions, 1304 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 22:09:19,796 INFO L231 Difference]: Finished difference. Result has 136 places, 108 transitions, 1106 flow [2024-06-21 22:09:19,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1054, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1106, PETRI_PLACES=136, PETRI_TRANSITIONS=108} [2024-06-21 22:09:19,797 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 108 predicate places. [2024-06-21 22:09:19,798 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 108 transitions, 1106 flow [2024-06-21 22:09:19,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:19,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:19,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:19,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 22:09:19,798 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)] === [2024-06-21 22:09:19,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:19,798 INFO L85 PathProgramCache]: Analyzing trace with hash -224030149, now seen corresponding path program 10 times [2024-06-21 22:09:19,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:19,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348659503] [2024-06-21 22:09:19,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:19,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:19,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:20,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:20,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:20,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348659503] [2024-06-21 22:09:20,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348659503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:20,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:20,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:09:20,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124055179] [2024-06-21 22:09:20,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:20,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:09:20,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:20,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:09:20,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:09:20,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:20,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 108 transitions, 1106 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:20,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:20,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:20,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:20,696 INFO L124 PetriNetUnfolderBase]: 295/574 cut-off events. [2024-06-21 22:09:20,696 INFO L125 PetriNetUnfolderBase]: For 10365/10365 co-relation queries the response was YES. [2024-06-21 22:09:20,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2875 conditions, 574 events. 295/574 cut-off events. For 10365/10365 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2682 event pairs, 64 based on Foata normal form. 14/583 useless extension candidates. Maximal degree in co-relation 2810. Up to 297 conditions per place. [2024-06-21 22:09:20,699 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 69 selfloop transitions, 46 changer transitions 8/125 dead transitions. [2024-06-21 22:09:20,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 125 transitions, 1468 flow [2024-06-21 22:09:20,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:09:20,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:09:20,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 98 transitions. [2024-06-21 22:09:20,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4224137931034483 [2024-06-21 22:09:20,701 INFO L175 Difference]: Start difference. First operand has 136 places, 108 transitions, 1106 flow. Second operand 8 states and 98 transitions. [2024-06-21 22:09:20,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 125 transitions, 1468 flow [2024-06-21 22:09:20,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 125 transitions, 1398 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 22:09:20,719 INFO L231 Difference]: Finished difference. Result has 137 places, 105 transitions, 1111 flow [2024-06-21 22:09:20,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1036, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1111, PETRI_PLACES=137, PETRI_TRANSITIONS=105} [2024-06-21 22:09:20,719 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 109 predicate places. [2024-06-21 22:09:20,719 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 105 transitions, 1111 flow [2024-06-21 22:09:20,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:20,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:20,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:20,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 22:09:20,720 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)] === [2024-06-21 22:09:20,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:20,720 INFO L85 PathProgramCache]: Analyzing trace with hash 4048941, now seen corresponding path program 1 times [2024-06-21 22:09:20,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:20,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928123574] [2024-06-21 22:09:20,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:20,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:20,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:21,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:21,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:21,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928123574] [2024-06-21 22:09:21,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928123574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:21,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:21,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:09:21,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680074960] [2024-06-21 22:09:21,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:21,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:09:21,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:21,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:09:21,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:09:21,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:21,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 105 transitions, 1111 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:21,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:21,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:21,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:21,467 INFO L124 PetriNetUnfolderBase]: 265/518 cut-off events. [2024-06-21 22:09:21,467 INFO L125 PetriNetUnfolderBase]: For 6340/6340 co-relation queries the response was YES. [2024-06-21 22:09:21,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2676 conditions, 518 events. 265/518 cut-off events. For 6340/6340 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2412 event pairs, 60 based on Foata normal form. 2/515 useless extension candidates. Maximal degree in co-relation 2611. Up to 306 conditions per place. [2024-06-21 22:09:21,472 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 69 selfloop transitions, 44 changer transitions 0/115 dead transitions. [2024-06-21 22:09:21,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 115 transitions, 1371 flow [2024-06-21 22:09:21,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:09:21,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:09:21,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 90 transitions. [2024-06-21 22:09:21,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3879310344827586 [2024-06-21 22:09:21,473 INFO L175 Difference]: Start difference. First operand has 137 places, 105 transitions, 1111 flow. Second operand 8 states and 90 transitions. [2024-06-21 22:09:21,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 115 transitions, 1371 flow [2024-06-21 22:09:21,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 115 transitions, 1184 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 22:09:21,498 INFO L231 Difference]: Finished difference. Result has 136 places, 105 transitions, 1017 flow [2024-06-21 22:09:21,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=924, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1017, PETRI_PLACES=136, PETRI_TRANSITIONS=105} [2024-06-21 22:09:21,499 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 108 predicate places. [2024-06-21 22:09:21,499 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 105 transitions, 1017 flow [2024-06-21 22:09:21,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:21,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:21,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:21,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 22:09:21,499 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)] === [2024-06-21 22:09:21,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:21,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1426812973, now seen corresponding path program 1 times [2024-06-21 22:09:21,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:21,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518153876] [2024-06-21 22:09:21,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:21,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:21,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:22,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:22,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:22,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518153876] [2024-06-21 22:09:22,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518153876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:22,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:22,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:09:22,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70656144] [2024-06-21 22:09:22,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:22,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:09:22,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:22,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:09:22,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:09:22,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:22,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 105 transitions, 1017 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:22,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:22,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:22,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:22,336 INFO L124 PetriNetUnfolderBase]: 269/526 cut-off events. [2024-06-21 22:09:22,336 INFO L125 PetriNetUnfolderBase]: For 6388/6388 co-relation queries the response was YES. [2024-06-21 22:09:22,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2565 conditions, 526 events. 269/526 cut-off events. For 6388/6388 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2476 event pairs, 64 based on Foata normal form. 2/525 useless extension candidates. Maximal degree in co-relation 2501. Up to 440 conditions per place. [2024-06-21 22:09:22,340 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 96 selfloop transitions, 23 changer transitions 0/121 dead transitions. [2024-06-21 22:09:22,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 121 transitions, 1299 flow [2024-06-21 22:09:22,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:09:22,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:09:22,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 93 transitions. [2024-06-21 22:09:22,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3563218390804598 [2024-06-21 22:09:22,342 INFO L175 Difference]: Start difference. First operand has 136 places, 105 transitions, 1017 flow. Second operand 9 states and 93 transitions. [2024-06-21 22:09:22,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 121 transitions, 1299 flow [2024-06-21 22:09:22,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 121 transitions, 1200 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 22:09:22,366 INFO L231 Difference]: Finished difference. Result has 138 places, 106 transitions, 976 flow [2024-06-21 22:09:22,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=918, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=976, PETRI_PLACES=138, PETRI_TRANSITIONS=106} [2024-06-21 22:09:22,367 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 110 predicate places. [2024-06-21 22:09:22,367 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 106 transitions, 976 flow [2024-06-21 22:09:22,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:22,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:22,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:22,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 22:09:22,368 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)] === [2024-06-21 22:09:22,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:22,368 INFO L85 PathProgramCache]: Analyzing trace with hash 115915799, now seen corresponding path program 2 times [2024-06-21 22:09:22,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:22,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813617984] [2024-06-21 22:09:22,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:22,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:22,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:22,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:22,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:22,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813617984] [2024-06-21 22:09:22,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813617984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:22,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:22,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:09:22,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376034146] [2024-06-21 22:09:22,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:22,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:09:22,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:22,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:09:22,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:09:22,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:22,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 106 transitions, 976 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:22,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:22,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:22,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:23,121 INFO L124 PetriNetUnfolderBase]: 273/534 cut-off events. [2024-06-21 22:09:23,121 INFO L125 PetriNetUnfolderBase]: For 6769/6769 co-relation queries the response was YES. [2024-06-21 22:09:23,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2554 conditions, 534 events. 273/534 cut-off events. For 6769/6769 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2525 event pairs, 40 based on Foata normal form. 2/533 useless extension candidates. Maximal degree in co-relation 2489. Up to 413 conditions per place. [2024-06-21 22:09:23,124 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 95 selfloop transitions, 25 changer transitions 0/122 dead transitions. [2024-06-21 22:09:23,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 122 transitions, 1260 flow [2024-06-21 22:09:23,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:09:23,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:09:23,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 90 transitions. [2024-06-21 22:09:23,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3448275862068966 [2024-06-21 22:09:23,129 INFO L175 Difference]: Start difference. First operand has 138 places, 106 transitions, 976 flow. Second operand 9 states and 90 transitions. [2024-06-21 22:09:23,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 122 transitions, 1260 flow [2024-06-21 22:09:23,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 122 transitions, 1212 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 22:09:23,160 INFO L231 Difference]: Finished difference. Result has 140 places, 107 transitions, 992 flow [2024-06-21 22:09:23,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=928, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=992, PETRI_PLACES=140, PETRI_TRANSITIONS=107} [2024-06-21 22:09:23,161 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 112 predicate places. [2024-06-21 22:09:23,161 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 107 transitions, 992 flow [2024-06-21 22:09:23,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:23,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:23,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:23,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 22:09:23,162 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)] === [2024-06-21 22:09:23,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:23,162 INFO L85 PathProgramCache]: Analyzing trace with hash -594660133, now seen corresponding path program 3 times [2024-06-21 22:09:23,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:23,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228603726] [2024-06-21 22:09:23,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:23,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:23,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:23,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:23,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:23,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228603726] [2024-06-21 22:09:23,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228603726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:23,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:23,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:09:23,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150355312] [2024-06-21 22:09:23,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:23,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:09:23,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:23,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:09:23,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:09:23,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:23,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 107 transitions, 992 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:23,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:23,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:23,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:23,945 INFO L124 PetriNetUnfolderBase]: 277/542 cut-off events. [2024-06-21 22:09:23,946 INFO L125 PetriNetUnfolderBase]: For 7103/7103 co-relation queries the response was YES. [2024-06-21 22:09:23,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2617 conditions, 542 events. 277/542 cut-off events. For 7103/7103 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2553 event pairs, 68 based on Foata normal form. 2/541 useless extension candidates. Maximal degree in co-relation 2551. Up to 454 conditions per place. [2024-06-21 22:09:23,950 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 93 selfloop transitions, 27 changer transitions 0/122 dead transitions. [2024-06-21 22:09:23,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 122 transitions, 1284 flow [2024-06-21 22:09:23,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:09:23,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:09:23,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 93 transitions. [2024-06-21 22:09:23,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3563218390804598 [2024-06-21 22:09:23,952 INFO L175 Difference]: Start difference. First operand has 140 places, 107 transitions, 992 flow. Second operand 9 states and 93 transitions. [2024-06-21 22:09:23,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 122 transitions, 1284 flow [2024-06-21 22:09:23,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 122 transitions, 1230 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 22:09:23,982 INFO L231 Difference]: Finished difference. Result has 142 places, 108 transitions, 1009 flow [2024-06-21 22:09:23,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=938, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1009, PETRI_PLACES=142, PETRI_TRANSITIONS=108} [2024-06-21 22:09:23,982 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 114 predicate places. [2024-06-21 22:09:23,982 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 108 transitions, 1009 flow [2024-06-21 22:09:23,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:23,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:23,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:23,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 22:09:23,983 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)] === [2024-06-21 22:09:23,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:23,984 INFO L85 PathProgramCache]: Analyzing trace with hash -593885443, now seen corresponding path program 4 times [2024-06-21 22:09:23,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:23,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324680703] [2024-06-21 22:09:23,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:23,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:23,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:24,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:24,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:24,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324680703] [2024-06-21 22:09:24,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324680703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:24,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:24,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:09:24,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076403251] [2024-06-21 22:09:24,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:24,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:09:24,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:24,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:09:24,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:09:24,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:24,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 108 transitions, 1009 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:24,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:24,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:24,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:24,754 INFO L124 PetriNetUnfolderBase]: 281/550 cut-off events. [2024-06-21 22:09:24,754 INFO L125 PetriNetUnfolderBase]: For 7657/7657 co-relation queries the response was YES. [2024-06-21 22:09:24,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2662 conditions, 550 events. 281/550 cut-off events. For 7657/7657 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2604 event pairs, 67 based on Foata normal form. 2/549 useless extension candidates. Maximal degree in co-relation 2595. Up to 446 conditions per place. [2024-06-21 22:09:24,771 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 94 selfloop transitions, 27 changer transitions 0/123 dead transitions. [2024-06-21 22:09:24,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 123 transitions, 1301 flow [2024-06-21 22:09:24,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:09:24,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:09:24,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 94 transitions. [2024-06-21 22:09:24,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36015325670498083 [2024-06-21 22:09:24,772 INFO L175 Difference]: Start difference. First operand has 142 places, 108 transitions, 1009 flow. Second operand 9 states and 94 transitions. [2024-06-21 22:09:24,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 123 transitions, 1301 flow [2024-06-21 22:09:24,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 123 transitions, 1242 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 22:09:24,803 INFO L231 Difference]: Finished difference. Result has 144 places, 109 transitions, 1022 flow [2024-06-21 22:09:24,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=950, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1022, PETRI_PLACES=144, PETRI_TRANSITIONS=109} [2024-06-21 22:09:24,803 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 116 predicate places. [2024-06-21 22:09:24,804 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 109 transitions, 1022 flow [2024-06-21 22:09:24,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:24,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:24,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:24,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 22:09:24,804 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)] === [2024-06-21 22:09:24,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:24,805 INFO L85 PathProgramCache]: Analyzing trace with hash 838945213, now seen corresponding path program 5 times [2024-06-21 22:09:24,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:24,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967102065] [2024-06-21 22:09:24,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:24,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:24,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:25,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:25,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:25,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967102065] [2024-06-21 22:09:25,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967102065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:25,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:25,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:09:25,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904394360] [2024-06-21 22:09:25,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:25,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:09:25,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:25,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:09:25,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:09:25,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:25,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 109 transitions, 1022 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:25,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:25,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:25,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:25,661 INFO L124 PetriNetUnfolderBase]: 285/558 cut-off events. [2024-06-21 22:09:25,661 INFO L125 PetriNetUnfolderBase]: For 8185/8185 co-relation queries the response was YES. [2024-06-21 22:09:25,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2715 conditions, 558 events. 285/558 cut-off events. For 8185/8185 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2670 event pairs, 45 based on Foata normal form. 2/557 useless extension candidates. Maximal degree in co-relation 2647. Up to 393 conditions per place. [2024-06-21 22:09:25,666 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 91 selfloop transitions, 29 changer transitions 0/122 dead transitions. [2024-06-21 22:09:25,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 122 transitions, 1304 flow [2024-06-21 22:09:25,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:09:25,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:09:25,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 81 transitions. [2024-06-21 22:09:25,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34913793103448276 [2024-06-21 22:09:25,667 INFO L175 Difference]: Start difference. First operand has 144 places, 109 transitions, 1022 flow. Second operand 8 states and 81 transitions. [2024-06-21 22:09:25,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 122 transitions, 1304 flow [2024-06-21 22:09:25,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 122 transitions, 1242 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 22:09:25,703 INFO L231 Difference]: Finished difference. Result has 145 places, 110 transitions, 1043 flow [2024-06-21 22:09:25,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=960, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1043, PETRI_PLACES=145, PETRI_TRANSITIONS=110} [2024-06-21 22:09:25,703 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 117 predicate places. [2024-06-21 22:09:25,704 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 110 transitions, 1043 flow [2024-06-21 22:09:25,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:25,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:25,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:25,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 22:09:25,704 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)] === [2024-06-21 22:09:25,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:25,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1630551887, now seen corresponding path program 6 times [2024-06-21 22:09:25,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:25,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162957948] [2024-06-21 22:09:25,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:25,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:25,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:26,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:26,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:26,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162957948] [2024-06-21 22:09:26,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162957948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:26,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:26,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:09:26,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890278460] [2024-06-21 22:09:26,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:26,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:09:26,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:26,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:09:26,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:09:26,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:26,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 110 transitions, 1043 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:26,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:26,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:26,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:26,599 INFO L124 PetriNetUnfolderBase]: 289/566 cut-off events. [2024-06-21 22:09:26,599 INFO L125 PetriNetUnfolderBase]: For 8646/8646 co-relation queries the response was YES. [2024-06-21 22:09:26,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2796 conditions, 566 events. 289/566 cut-off events. For 8646/8646 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2702 event pairs, 70 based on Foata normal form. 2/565 useless extension candidates. Maximal degree in co-relation 2727. Up to 435 conditions per place. [2024-06-21 22:09:26,602 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 85 selfloop transitions, 36 changer transitions 0/123 dead transitions. [2024-06-21 22:09:26,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 123 transitions, 1337 flow [2024-06-21 22:09:26,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:09:26,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:09:26,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 83 transitions. [2024-06-21 22:09:26,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3577586206896552 [2024-06-21 22:09:26,604 INFO L175 Difference]: Start difference. First operand has 145 places, 110 transitions, 1043 flow. Second operand 8 states and 83 transitions. [2024-06-21 22:09:26,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 123 transitions, 1337 flow [2024-06-21 22:09:26,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 123 transitions, 1266 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 22:09:26,628 INFO L231 Difference]: Finished difference. Result has 147 places, 111 transitions, 1070 flow [2024-06-21 22:09:26,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=976, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1070, PETRI_PLACES=147, PETRI_TRANSITIONS=111} [2024-06-21 22:09:26,628 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 119 predicate places. [2024-06-21 22:09:26,628 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 111 transitions, 1070 flow [2024-06-21 22:09:26,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:26,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:26,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:26,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 22:09:26,629 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)] === [2024-06-21 22:09:26,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:26,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1713672497, now seen corresponding path program 7 times [2024-06-21 22:09:26,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:26,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788495605] [2024-06-21 22:09:26,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:26,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:26,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:27,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:27,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:27,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788495605] [2024-06-21 22:09:27,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788495605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:27,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:27,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:09:27,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164631396] [2024-06-21 22:09:27,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:27,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:09:27,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:27,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:09:27,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:09:27,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:27,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 111 transitions, 1070 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:27,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:27,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:27,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:27,454 INFO L124 PetriNetUnfolderBase]: 293/574 cut-off events. [2024-06-21 22:09:27,455 INFO L125 PetriNetUnfolderBase]: For 8243/8243 co-relation queries the response was YES. [2024-06-21 22:09:27,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2821 conditions, 574 events. 293/574 cut-off events. For 8243/8243 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2763 event pairs, 67 based on Foata normal form. 2/573 useless extension candidates. Maximal degree in co-relation 2751. Up to 399 conditions per place. [2024-06-21 22:09:27,459 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 87 selfloop transitions, 35 changer transitions 0/124 dead transitions. [2024-06-21 22:09:27,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 124 transitions, 1360 flow [2024-06-21 22:09:27,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:09:27,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:09:27,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 84 transitions. [2024-06-21 22:09:27,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3620689655172414 [2024-06-21 22:09:27,469 INFO L175 Difference]: Start difference. First operand has 147 places, 111 transitions, 1070 flow. Second operand 8 states and 84 transitions. [2024-06-21 22:09:27,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 124 transitions, 1360 flow [2024-06-21 22:09:27,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 124 transitions, 1280 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 22:09:27,507 INFO L231 Difference]: Finished difference. Result has 149 places, 112 transitions, 1083 flow [2024-06-21 22:09:27,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=992, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1083, PETRI_PLACES=149, PETRI_TRANSITIONS=112} [2024-06-21 22:09:27,508 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 121 predicate places. [2024-06-21 22:09:27,508 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 112 transitions, 1083 flow [2024-06-21 22:09:27,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:27,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:27,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:27,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 22:09:27,509 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)] === [2024-06-21 22:09:27,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:27,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1952771035, now seen corresponding path program 1 times [2024-06-21 22:09:27,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:27,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752031174] [2024-06-21 22:09:27,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:27,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:27,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:27,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:27,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:27,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752031174] [2024-06-21 22:09:27,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752031174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:27,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:27,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:09:27,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192641003] [2024-06-21 22:09:27,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:27,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:09:27,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:27,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:09:27,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:09:28,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:28,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 112 transitions, 1083 flow. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:28,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:28,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:28,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:28,235 INFO L124 PetriNetUnfolderBase]: 341/674 cut-off events. [2024-06-21 22:09:28,235 INFO L125 PetriNetUnfolderBase]: For 17038/17038 co-relation queries the response was YES. [2024-06-21 22:09:28,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3490 conditions, 674 events. 341/674 cut-off events. For 17038/17038 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3354 event pairs, 80 based on Foata normal form. 8/677 useless extension candidates. Maximal degree in co-relation 3419. Up to 312 conditions per place. [2024-06-21 22:09:28,240 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 71 selfloop transitions, 53 changer transitions 6/132 dead transitions. [2024-06-21 22:09:28,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 132 transitions, 1491 flow [2024-06-21 22:09:28,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:09:28,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:09:28,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 97 transitions. [2024-06-21 22:09:28,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41810344827586204 [2024-06-21 22:09:28,245 INFO L175 Difference]: Start difference. First operand has 149 places, 112 transitions, 1083 flow. Second operand 8 states and 97 transitions. [2024-06-21 22:09:28,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 132 transitions, 1491 flow [2024-06-21 22:09:28,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 132 transitions, 1410 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 22:09:28,302 INFO L231 Difference]: Finished difference. Result has 151 places, 111 transitions, 1110 flow [2024-06-21 22:09:28,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1006, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1110, PETRI_PLACES=151, PETRI_TRANSITIONS=111} [2024-06-21 22:09:28,303 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 123 predicate places. [2024-06-21 22:09:28,303 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 111 transitions, 1110 flow [2024-06-21 22:09:28,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:28,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:28,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:28,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 22:09:28,304 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)] === [2024-06-21 22:09:28,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:28,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1952763595, now seen corresponding path program 2 times [2024-06-21 22:09:28,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:28,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889717622] [2024-06-21 22:09:28,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:28,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:28,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:28,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:28,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889717622] [2024-06-21 22:09:28,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889717622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:28,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:28,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:09:28,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028704774] [2024-06-21 22:09:28,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:28,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:09:28,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:28,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:09:28,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:09:28,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:28,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 111 transitions, 1110 flow. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:28,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:28,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:28,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:29,033 INFO L124 PetriNetUnfolderBase]: 331/660 cut-off events. [2024-06-21 22:09:29,033 INFO L125 PetriNetUnfolderBase]: For 16963/16963 co-relation queries the response was YES. [2024-06-21 22:09:29,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3359 conditions, 660 events. 331/660 cut-off events. For 16963/16963 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3292 event pairs, 78 based on Foata normal form. 12/667 useless extension candidates. Maximal degree in co-relation 3287. Up to 400 conditions per place. [2024-06-21 22:09:29,038 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 66 selfloop transitions, 52 changer transitions 7/127 dead transitions. [2024-06-21 22:09:29,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 127 transitions, 1430 flow [2024-06-21 22:09:29,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:09:29,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:09:29,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 94 transitions. [2024-06-21 22:09:29,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4051724137931034 [2024-06-21 22:09:29,039 INFO L175 Difference]: Start difference. First operand has 151 places, 111 transitions, 1110 flow. Second operand 8 states and 94 transitions. [2024-06-21 22:09:29,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 127 transitions, 1430 flow [2024-06-21 22:09:29,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 127 transitions, 1322 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 22:09:29,075 INFO L231 Difference]: Finished difference. Result has 151 places, 109 transitions, 1105 flow [2024-06-21 22:09:29,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1002, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1105, PETRI_PLACES=151, PETRI_TRANSITIONS=109} [2024-06-21 22:09:29,075 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 123 predicate places. [2024-06-21 22:09:29,075 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 109 transitions, 1105 flow [2024-06-21 22:09:29,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:29,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:29,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:29,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 22:09:29,076 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)] === [2024-06-21 22:09:29,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:29,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1947049303, now seen corresponding path program 8 times [2024-06-21 22:09:29,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:29,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917752953] [2024-06-21 22:09:29,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:29,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:29,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:29,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:29,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:29,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917752953] [2024-06-21 22:09:29,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917752953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:29,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:29,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:09:29,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214310866] [2024-06-21 22:09:29,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:29,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:09:29,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:29,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:09:29,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:09:29,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:29,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 109 transitions, 1105 flow. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:29,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:29,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:29,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:29,860 INFO L124 PetriNetUnfolderBase]: 289/574 cut-off events. [2024-06-21 22:09:29,860 INFO L125 PetriNetUnfolderBase]: For 8377/8377 co-relation queries the response was YES. [2024-06-21 22:09:29,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2875 conditions, 574 events. 289/574 cut-off events. For 8377/8377 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2803 event pairs, 68 based on Foata normal form. 2/571 useless extension candidates. Maximal degree in co-relation 2803. Up to 362 conditions per place. [2024-06-21 22:09:29,864 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 75 selfloop transitions, 44 changer transitions 0/121 dead transitions. [2024-06-21 22:09:29,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 121 transitions, 1393 flow [2024-06-21 22:09:29,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:09:29,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:09:29,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2024-06-21 22:09:29,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 22:09:29,873 INFO L175 Difference]: Start difference. First operand has 151 places, 109 transitions, 1105 flow. Second operand 8 states and 87 transitions. [2024-06-21 22:09:29,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 121 transitions, 1393 flow [2024-06-21 22:09:29,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 121 transitions, 1260 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 22:09:29,911 INFO L231 Difference]: Finished difference. Result has 152 places, 110 transitions, 1080 flow [2024-06-21 22:09:29,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=972, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1080, PETRI_PLACES=152, PETRI_TRANSITIONS=110} [2024-06-21 22:09:29,912 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 124 predicate places. [2024-06-21 22:09:29,912 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 110 transitions, 1080 flow [2024-06-21 22:09:29,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:29,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:29,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:29,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 22:09:29,913 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)] === [2024-06-21 22:09:29,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:29,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1947045583, now seen corresponding path program 9 times [2024-06-21 22:09:29,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:29,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851165050] [2024-06-21 22:09:29,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:29,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:29,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:30,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:30,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:30,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851165050] [2024-06-21 22:09:30,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851165050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:30,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:30,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:09:30,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458038055] [2024-06-21 22:09:30,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:30,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:09:30,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:30,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:09:30,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:09:30,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:30,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 110 transitions, 1080 flow. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:30,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:30,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:30,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:30,694 INFO L124 PetriNetUnfolderBase]: 286/569 cut-off events. [2024-06-21 22:09:30,694 INFO L125 PetriNetUnfolderBase]: For 7718/7718 co-relation queries the response was YES. [2024-06-21 22:09:30,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2736 conditions, 569 events. 286/569 cut-off events. For 7718/7718 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2774 event pairs, 61 based on Foata normal form. 2/566 useless extension candidates. Maximal degree in co-relation 2663. Up to 311 conditions per place. [2024-06-21 22:09:30,698 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 72 selfloop transitions, 47 changer transitions 0/121 dead transitions. [2024-06-21 22:09:30,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 121 transitions, 1350 flow [2024-06-21 22:09:30,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:09:30,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:09:30,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 88 transitions. [2024-06-21 22:09:30,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-21 22:09:30,699 INFO L175 Difference]: Start difference. First operand has 152 places, 110 transitions, 1080 flow. Second operand 8 states and 88 transitions. [2024-06-21 22:09:30,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 121 transitions, 1350 flow [2024-06-21 22:09:30,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 121 transitions, 1252 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 22:09:30,728 INFO L231 Difference]: Finished difference. Result has 154 places, 110 transitions, 1082 flow [2024-06-21 22:09:30,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=982, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1082, PETRI_PLACES=154, PETRI_TRANSITIONS=110} [2024-06-21 22:09:30,729 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 126 predicate places. [2024-06-21 22:09:30,729 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 110 transitions, 1082 flow [2024-06-21 22:09:30,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:30,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:30,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:30,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 22:09:30,730 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)] === [2024-06-21 22:09:30,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:30,730 INFO L85 PathProgramCache]: Analyzing trace with hash 125517851, now seen corresponding path program 3 times [2024-06-21 22:09:30,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:30,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25587719] [2024-06-21 22:09:30,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:30,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:31,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:31,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:31,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25587719] [2024-06-21 22:09:31,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25587719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:31,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:31,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:09:31,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632278675] [2024-06-21 22:09:31,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:31,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:09:31,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:31,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:09:31,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:09:31,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:31,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 110 transitions, 1082 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:31,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:31,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:31,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:31,515 INFO L124 PetriNetUnfolderBase]: 302/605 cut-off events. [2024-06-21 22:09:31,515 INFO L125 PetriNetUnfolderBase]: For 12467/12467 co-relation queries the response was YES. [2024-06-21 22:09:31,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2841 conditions, 605 events. 302/605 cut-off events. For 12467/12467 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2987 event pairs, 73 based on Foata normal form. 10/610 useless extension candidates. Maximal degree in co-relation 2767. Up to 341 conditions per place. [2024-06-21 22:09:31,519 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 74 selfloop transitions, 40 changer transitions 10/126 dead transitions. [2024-06-21 22:09:31,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 126 transitions, 1390 flow [2024-06-21 22:09:31,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:09:31,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:09:31,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 103 transitions. [2024-06-21 22:09:31,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3946360153256705 [2024-06-21 22:09:31,520 INFO L175 Difference]: Start difference. First operand has 154 places, 110 transitions, 1082 flow. Second operand 9 states and 103 transitions. [2024-06-21 22:09:31,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 126 transitions, 1390 flow [2024-06-21 22:09:31,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 126 transitions, 1286 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 22:09:31,554 INFO L231 Difference]: Finished difference. Result has 157 places, 106 transitions, 1041 flow [2024-06-21 22:09:31,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1041, PETRI_PLACES=157, PETRI_TRANSITIONS=106} [2024-06-21 22:09:31,554 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 129 predicate places. [2024-06-21 22:09:31,554 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 106 transitions, 1041 flow [2024-06-21 22:09:31,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:31,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:31,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:31,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 22:09:31,555 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)] === [2024-06-21 22:09:31,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:31,555 INFO L85 PathProgramCache]: Analyzing trace with hash 125727101, now seen corresponding path program 4 times [2024-06-21 22:09:31,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:31,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511149195] [2024-06-21 22:09:31,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:31,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:31,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:31,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:31,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:31,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511149195] [2024-06-21 22:09:31,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511149195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:31,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:31,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:09:31,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67736058] [2024-06-21 22:09:31,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:31,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:09:31,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:31,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:09:31,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:09:32,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:32,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 106 transitions, 1041 flow. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:32,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:32,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:32,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:32,238 INFO L124 PetriNetUnfolderBase]: 284/579 cut-off events. [2024-06-21 22:09:32,238 INFO L125 PetriNetUnfolderBase]: For 11836/11836 co-relation queries the response was YES. [2024-06-21 22:09:32,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2720 conditions, 579 events. 284/579 cut-off events. For 11836/11836 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2869 event pairs, 69 based on Foata normal form. 8/582 useless extension candidates. Maximal degree in co-relation 2645. Up to 329 conditions per place. [2024-06-21 22:09:32,242 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 72 selfloop transitions, 35 changer transitions 12/121 dead transitions. [2024-06-21 22:09:32,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 121 transitions, 1329 flow [2024-06-21 22:09:32,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:09:32,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:09:32,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 93 transitions. [2024-06-21 22:09:32,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40086206896551724 [2024-06-21 22:09:32,243 INFO L175 Difference]: Start difference. First operand has 157 places, 106 transitions, 1041 flow. Second operand 8 states and 93 transitions. [2024-06-21 22:09:32,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 121 transitions, 1329 flow [2024-06-21 22:09:32,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 121 transitions, 1216 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 22:09:32,277 INFO L231 Difference]: Finished difference. Result has 153 places, 100 transitions, 960 flow [2024-06-21 22:09:32,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=930, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=960, PETRI_PLACES=153, PETRI_TRANSITIONS=100} [2024-06-21 22:09:32,277 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 125 predicate places. [2024-06-21 22:09:32,277 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 100 transitions, 960 flow [2024-06-21 22:09:32,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:32,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:32,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:32,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 22:09:32,278 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)] === [2024-06-21 22:09:32,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:32,278 INFO L85 PathProgramCache]: Analyzing trace with hash 391424381, now seen corresponding path program 5 times [2024-06-21 22:09:32,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:32,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471990039] [2024-06-21 22:09:32,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:32,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:32,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:32,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:32,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:32,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471990039] [2024-06-21 22:09:32,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471990039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:32,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:32,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:09:32,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871149628] [2024-06-21 22:09:32,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:32,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:09:32,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:32,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:09:32,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:09:32,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:32,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 100 transitions, 960 flow. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:32,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:32,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:32,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:32,896 INFO L124 PetriNetUnfolderBase]: 270/553 cut-off events. [2024-06-21 22:09:32,896 INFO L125 PetriNetUnfolderBase]: For 12220/12220 co-relation queries the response was YES. [2024-06-21 22:09:32,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2583 conditions, 553 events. 270/553 cut-off events. For 12220/12220 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2668 event pairs, 72 based on Foata normal form. 8/556 useless extension candidates. Maximal degree in co-relation 2522. Up to 179 conditions per place. [2024-06-21 22:09:32,899 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 71 selfloop transitions, 30 changer transitions 12/115 dead transitions. [2024-06-21 22:09:32,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 115 transitions, 1292 flow [2024-06-21 22:09:32,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:09:32,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:09:32,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 88 transitions. [2024-06-21 22:09:32,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-21 22:09:32,900 INFO L175 Difference]: Start difference. First operand has 153 places, 100 transitions, 960 flow. Second operand 8 states and 88 transitions. [2024-06-21 22:09:32,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 115 transitions, 1292 flow [2024-06-21 22:09:32,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 115 transitions, 1140 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-21 22:09:32,925 INFO L231 Difference]: Finished difference. Result has 146 places, 94 transitions, 844 flow [2024-06-21 22:09:32,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=844, PETRI_PLACES=146, PETRI_TRANSITIONS=94} [2024-06-21 22:09:32,926 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 118 predicate places. [2024-06-21 22:09:32,926 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 94 transitions, 844 flow [2024-06-21 22:09:32,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:32,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:32,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:32,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 22:09:32,926 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)] === [2024-06-21 22:09:32,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:32,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1281528554, now seen corresponding path program 1 times [2024-06-21 22:09:32,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:32,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122676385] [2024-06-21 22:09:32,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:32,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:32,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:33,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:33,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122676385] [2024-06-21 22:09:33,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122676385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:33,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:33,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:09:33,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708477818] [2024-06-21 22:09:33,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:33,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:09:33,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:33,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:09:33,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:09:33,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:33,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 94 transitions, 844 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:33,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:33,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:33,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:33,857 INFO L124 PetriNetUnfolderBase]: 236/479 cut-off events. [2024-06-21 22:09:33,857 INFO L125 PetriNetUnfolderBase]: For 6971/6971 co-relation queries the response was YES. [2024-06-21 22:09:33,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2041 conditions, 479 events. 236/479 cut-off events. For 6971/6971 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2219 event pairs, 47 based on Foata normal form. 6/482 useless extension candidates. Maximal degree in co-relation 1982. Up to 282 conditions per place. [2024-06-21 22:09:33,860 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 66 selfloop transitions, 14 changer transitions 28/110 dead transitions. [2024-06-21 22:09:33,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 110 transitions, 1100 flow [2024-06-21 22:09:33,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:09:33,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:09:33,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 90 transitions. [2024-06-21 22:09:33,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3448275862068966 [2024-06-21 22:09:33,861 INFO L175 Difference]: Start difference. First operand has 146 places, 94 transitions, 844 flow. Second operand 9 states and 90 transitions. [2024-06-21 22:09:33,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 110 transitions, 1100 flow [2024-06-21 22:09:33,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 110 transitions, 1015 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 22:09:33,877 INFO L231 Difference]: Finished difference. Result has 141 places, 78 transitions, 660 flow [2024-06-21 22:09:33,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=660, PETRI_PLACES=141, PETRI_TRANSITIONS=78} [2024-06-21 22:09:33,877 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 113 predicate places. [2024-06-21 22:09:33,877 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 78 transitions, 660 flow [2024-06-21 22:09:33,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:33,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:33,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:33,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 22:09:33,877 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)] === [2024-06-21 22:09:33,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:33,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1254594290, now seen corresponding path program 2 times [2024-06-21 22:09:33,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:33,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756234350] [2024-06-21 22:09:33,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:33,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:33,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:34,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:34,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:34,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756234350] [2024-06-21 22:09:34,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756234350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:34,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:34,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:09:34,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357551265] [2024-06-21 22:09:34,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:34,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:09:34,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:34,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:09:34,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:09:34,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:34,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 78 transitions, 660 flow. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:34,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:34,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:34,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:34,732 INFO L124 PetriNetUnfolderBase]: 175/360 cut-off events. [2024-06-21 22:09:34,733 INFO L125 PetriNetUnfolderBase]: For 5797/5797 co-relation queries the response was YES. [2024-06-21 22:09:34,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1549 conditions, 360 events. 175/360 cut-off events. For 5797/5797 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1490 event pairs, 32 based on Foata normal form. 6/361 useless extension candidates. Maximal degree in co-relation 1493. Up to 124 conditions per place. [2024-06-21 22:09:34,734 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 35 selfloop transitions, 20 changer transitions 31/88 dead transitions. [2024-06-21 22:09:34,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 88 transitions, 858 flow [2024-06-21 22:09:34,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:09:34,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:09:34,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 76 transitions. [2024-06-21 22:09:34,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3275862068965517 [2024-06-21 22:09:34,741 INFO L175 Difference]: Start difference. First operand has 141 places, 78 transitions, 660 flow. Second operand 8 states and 76 transitions. [2024-06-21 22:09:34,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 88 transitions, 858 flow [2024-06-21 22:09:34,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 88 transitions, 817 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 22:09:34,752 INFO L231 Difference]: Finished difference. Result has 125 places, 55 transitions, 495 flow [2024-06-21 22:09:34,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=619, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=495, PETRI_PLACES=125, PETRI_TRANSITIONS=55} [2024-06-21 22:09:34,753 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 97 predicate places. [2024-06-21 22:09:34,753 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 55 transitions, 495 flow [2024-06-21 22:09:34,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:34,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:34,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:34,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 22:09:34,753 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)] === [2024-06-21 22:09:34,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:34,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1223436104, now seen corresponding path program 3 times [2024-06-21 22:09:34,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:34,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213906324] [2024-06-21 22:09:34,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:34,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:34,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:35,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:35,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:35,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213906324] [2024-06-21 22:09:35,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213906324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:35,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:35,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:09:35,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993323505] [2024-06-21 22:09:35,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:35,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:09:35,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:35,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:09:35,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:09:35,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 22:09:35,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 55 transitions, 495 flow. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:35,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:35,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 22:09:35,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:35,540 INFO L124 PetriNetUnfolderBase]: 97/226 cut-off events. [2024-06-21 22:09:35,540 INFO L125 PetriNetUnfolderBase]: For 2639/2639 co-relation queries the response was YES. [2024-06-21 22:09:35,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 917 conditions, 226 events. 97/226 cut-off events. For 2639/2639 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 872 event pairs, 13 based on Foata normal form. 6/227 useless extension candidates. Maximal degree in co-relation 864. Up to 57 conditions per place. [2024-06-21 22:09:35,541 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 0 selfloop transitions, 0 changer transitions 60/60 dead transitions. [2024-06-21 22:09:35,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 60 transitions, 569 flow [2024-06-21 22:09:35,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:09:35,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:09:35,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 67 transitions. [2024-06-21 22:09:35,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28879310344827586 [2024-06-21 22:09:35,542 INFO L175 Difference]: Start difference. First operand has 125 places, 55 transitions, 495 flow. Second operand 8 states and 67 transitions. [2024-06-21 22:09:35,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 60 transitions, 569 flow [2024-06-21 22:09:35,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 60 transitions, 457 flow, removed 1 selfloop flow, removed 21 redundant places. [2024-06-21 22:09:35,545 INFO L231 Difference]: Finished difference. Result has 96 places, 0 transitions, 0 flow [2024-06-21 22:09:35,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=96, PETRI_TRANSITIONS=0} [2024-06-21 22:09:35,545 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 68 predicate places. [2024-06-21 22:09:35,546 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 0 transitions, 0 flow [2024-06-21 22:09:35,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:35,549 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-21 22:09:35,549 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-21 22:09:35,549 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-21 22:09:35,549 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-21 22:09:35,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 22:09:35,550 INFO L445 BasicCegarLoop]: Path program histogram: [10, 9, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:35,552 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-21 22:09:35,553 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-21 22:09:35,556 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-21 22:09:35,556 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-21 22:09:35,557 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.06 10:09:35 BasicIcfg [2024-06-21 22:09:35,557 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-21 22:09:35,558 INFO L158 Benchmark]: Toolchain (without parser) took 49522.52ms. Allocated memory was 163.6MB in the beginning and 750.8MB in the end (delta: 587.2MB). Free memory was 87.9MB in the beginning and 377.5MB in the end (delta: -289.7MB). Peak memory consumption was 300.3MB. Max. memory is 16.1GB. [2024-06-21 22:09:35,558 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 104.9MB. Free memory is still 69.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 22:09:35,558 INFO L158 Benchmark]: Witness Parser took 0.18ms. Allocated memory is still 163.6MB. Free memory is still 92.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 22:09:35,558 INFO L158 Benchmark]: CACSL2BoogieTranslator took 734.14ms. Allocated memory is still 163.6MB. Free memory was 87.7MB in the beginning and 106.5MB in the end (delta: -18.8MB). Peak memory consumption was 9.6MB. Max. memory is 16.1GB. [2024-06-21 22:09:35,558 INFO L158 Benchmark]: Boogie Procedure Inliner took 63.50ms. Allocated memory is still 163.6MB. Free memory was 106.5MB in the beginning and 103.1MB in the end (delta: 3.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 22:09:35,559 INFO L158 Benchmark]: Boogie Preprocessor took 44.39ms. Allocated memory is still 163.6MB. Free memory was 103.1MB in the beginning and 100.2MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-21 22:09:35,559 INFO L158 Benchmark]: RCFGBuilder took 625.55ms. Allocated memory is still 163.6MB. Free memory was 100.2MB in the beginning and 52.0MB in the end (delta: 48.2MB). Peak memory consumption was 48.2MB. Max. memory is 16.1GB. [2024-06-21 22:09:35,559 INFO L158 Benchmark]: TraceAbstraction took 48049.10ms. Allocated memory was 163.6MB in the beginning and 750.8MB in the end (delta: 587.2MB). Free memory was 51.2MB in the beginning and 377.5MB in the end (delta: -326.4MB). Peak memory consumption was 261.4MB. Max. memory is 16.1GB. [2024-06-21 22:09:35,560 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 104.9MB. Free memory is still 69.1MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.18ms. Allocated memory is still 163.6MB. Free memory is still 92.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 734.14ms. Allocated memory is still 163.6MB. Free memory was 87.7MB in the beginning and 106.5MB in the end (delta: -18.8MB). Peak memory consumption was 9.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 63.50ms. Allocated memory is still 163.6MB. Free memory was 106.5MB in the beginning and 103.1MB in the end (delta: 3.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.39ms. Allocated memory is still 163.6MB. Free memory was 103.1MB in the beginning and 100.2MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 625.55ms. Allocated memory is still 163.6MB. Free memory was 100.2MB in the beginning and 52.0MB in the end (delta: 48.2MB). Peak memory consumption was 48.2MB. Max. memory is 16.1GB. * TraceAbstraction took 48049.10ms. Allocated memory was 163.6MB in the beginning and 750.8MB in the end (delta: 587.2MB). Free memory was 51.2MB in the beginning and 377.5MB in the end (delta: -326.4MB). Peak memory consumption was 261.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 793]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 794]: 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, 46 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: 47.9s, OverallIterations: 56, TraceHistogramMax: 1, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.0s, AutomataDifference: 15.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2548 SdHoareTripleChecker+Valid, 8.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2076 mSDsluCounter, 2105 SdHoareTripleChecker+Invalid, 7.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1753 mSDsCounter, 501 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11905 IncrementalHoareTripleChecker+Invalid, 12406 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 501 mSolverCounterUnsat, 352 mSDtfsCounter, 11905 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 454 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 452 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 11.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1128occurred in iteration=35, InterpolantAutomatonStates: 428, 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, 0.4s SatisfiabilityAnalysisTime, 31.4s InterpolantComputationTime, 790 NumberOfCodeBlocks, 790 NumberOfCodeBlocksAsserted, 56 NumberOfCheckSat, 734 ConstructedInterpolants, 0 QuantifiedInterpolants, 28435 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 56 InterpolantComputations, 56 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! [2024-06-21 22:09:35,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE