./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/rfi000_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/rfi000_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/rfi000_power.opt_pso.opt_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/rfi000_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 21:19:31,149 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 21:19:31,216 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 21:19:31,228 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 21:19:31,229 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 21:19:31,251 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 21:19:31,253 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 21:19:31,254 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 21:19:31,254 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 21:19:31,257 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 21:19:31,258 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 21:19:31,258 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 21:19:31,259 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 21:19:31,260 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 21:19:31,260 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 21:19:31,260 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 21:19:31,260 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 21:19:31,261 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 21:19:31,261 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 21:19:31,262 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 21:19:31,262 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 21:19:31,262 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 21:19:31,263 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 21:19:31,263 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 21:19:31,263 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 21:19:31,263 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 21:19:31,263 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 21:19:31,264 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 21:19:31,264 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 21:19:31,264 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 21:19:31,265 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 21:19:31,265 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 21:19:31,265 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:19:31,266 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 21:19:31,266 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 21:19:31,266 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 21:19:31,266 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 21:19:31,266 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 21:19:31,266 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 21:19:31,267 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 21:19:31,267 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 21:19:31,267 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 21:19:31,267 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 21:19:31,267 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 21:19:31,498 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 21:19:31,530 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 21:19:31,532 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 21:19:31,533 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 21:19:31,534 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 21:19:31,534 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi000_power.opt_pso.opt_rmo.opt.i [2024-06-21 21:19:32,610 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 21:19:32,833 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 21:19:32,833 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi000_power.opt_pso.opt_rmo.opt.i [2024-06-21 21:19:32,848 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cea7be058/88c100464c494644b68361b0bc6c23cc/FLAG8dd63783a [2024-06-21 21:19:32,862 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cea7be058/88c100464c494644b68361b0bc6c23cc [2024-06-21 21:19:32,864 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 21:19:32,865 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 21:19:32,866 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/rfi000_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-21 21:19:32,985 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 21:19:32,986 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 21:19:32,988 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 21:19:32,988 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 21:19:32,992 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 21:19:32,993 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:19:32" (1/2) ... [2024-06-21 21:19:32,993 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ea99e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:19:32, skipping insertion in model container [2024-06-21 21:19:32,993 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:19:32" (1/2) ... [2024-06-21 21:19:32,995 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@b71a7c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:19:32, skipping insertion in model container [2024-06-21 21:19:32,995 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:19:32" (2/2) ... [2024-06-21 21:19:32,996 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ea99e1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:19:32, skipping insertion in model container [2024-06-21 21:19:32,996 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:19:32" (2/2) ... [2024-06-21 21:19:32,996 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 21:19:33,042 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 21:19:33,044 INFO L97 edCorrectnessWitness]: Location invariant before [L804-L804] ((((((((((((((! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((((((((((((((0 <= __unbuffered_cnt && x$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)) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) && ((__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1) || __unbuffered_p1_EBX == 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 || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1) || __unbuffered_p1_EBX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt) [2024-06-21 21:19:33,044 INFO L97 edCorrectnessWitness]: Location invariant before [L803-L803] ((((((((((((((! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! 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$w_buff1 == 2)) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) && ((__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1) || __unbuffered_p1_EBX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1) || __unbuffered_p1_EBX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt) [2024-06-21 21:19:33,044 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 21:19:33,044 INFO L106 edCorrectnessWitness]: ghost_update [L801-L801] multithreaded = 1; [2024-06-21 21:19:33,079 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 21:19:33,363 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:19:33,372 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 21:19:33,490 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:19:33,525 INFO L206 MainTranslator]: Completed translation [2024-06-21 21:19:33,526 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:19:33 WrapperNode [2024-06-21 21:19:33,526 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 21:19:33,527 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 21:19:33,527 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 21:19:33,527 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 21:19:33,532 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 09:19:33" (1/1) ... [2024-06-21 21:19:33,543 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 09:19:33" (1/1) ... [2024-06-21 21:19:33,578 INFO L138 Inliner]: procedures = 174, calls = 38, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 138 [2024-06-21 21:19:33,579 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 21:19:33,579 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 21:19:33,579 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 21:19:33,580 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 21:19:33,589 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 09:19:33" (1/1) ... [2024-06-21 21:19:33,589 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 09:19:33" (1/1) ... [2024-06-21 21:19:33,595 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 09:19:33" (1/1) ... [2024-06-21 21:19:33,630 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 21:19:33,632 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 09:19:33" (1/1) ... [2024-06-21 21:19:33,632 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 09:19:33" (1/1) ... [2024-06-21 21:19:33,646 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 09:19:33" (1/1) ... [2024-06-21 21:19:33,648 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 09:19:33" (1/1) ... [2024-06-21 21:19:33,655 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 09:19:33" (1/1) ... [2024-06-21 21:19:33,656 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 09:19:33" (1/1) ... [2024-06-21 21:19:33,658 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 21:19:33,665 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 21:19:33,665 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 21:19:33,665 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 21:19:33,666 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 09:19:33" (1/1) ... [2024-06-21 21:19:33,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:19:33,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 21:19:33,714 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 21:19:33,745 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 21:19:33,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 21:19:33,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 21:19:33,759 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 21:19:33,759 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 21:19:33,759 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 21:19:33,759 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 21:19:33,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 21:19:33,760 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 21:19:33,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 21:19:33,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 21:19:33,763 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 21:19:33,866 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 21:19:33,868 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 21:19:34,139 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 21:19:34,139 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 21:19:34,242 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 21:19:34,242 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 21:19:34,242 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:19:34 BoogieIcfgContainer [2024-06-21 21:19:34,243 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 21:19:34,244 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 21:19:34,244 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 21:19:34,247 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 21:19:34,247 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 09:19:32" (1/4) ... [2024-06-21 21:19:34,248 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49bc5436 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:19:34, skipping insertion in model container [2024-06-21 21:19:34,248 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:19:32" (2/4) ... [2024-06-21 21:19:34,248 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49bc5436 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:19:34, skipping insertion in model container [2024-06-21 21:19:34,248 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 09:19:33" (3/4) ... [2024-06-21 21:19:34,248 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49bc5436 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:19:34, skipping insertion in model container [2024-06-21 21:19:34,248 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:19:34" (4/4) ... [2024-06-21 21:19:34,249 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi000_power.opt_pso.opt_rmo.opt.i [2024-06-21 21:19:34,262 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 21:19:34,263 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-21 21:19:34,263 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 21:19:34,308 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 21:19:34,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 31 transitions, 70 flow [2024-06-21 21:19:34,372 INFO L124 PetriNetUnfolderBase]: 0/29 cut-off events. [2024-06-21 21:19:34,372 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:19:34,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 29 events. 0/29 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. 0/27 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 21:19:34,379 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 31 transitions, 70 flow [2024-06-21 21:19:34,381 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 23 transitions, 52 flow [2024-06-21 21:19:34,389 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 21:19:34,394 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;@147ebc4c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 21:19:34,394 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-21 21:19:34,397 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 21:19:34,397 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 21:19:34,398 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:19:34,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:34,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 21:19:34,399 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 21:19:34,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:34,405 INFO L85 PathProgramCache]: Analyzing trace with hash 328598881, now seen corresponding path program 1 times [2024-06-21 21:19:34,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:34,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137765511] [2024-06-21 21:19:34,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:34,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:34,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:35,221 INFO 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 21:19:35,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:35,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137765511] [2024-06-21 21:19:35,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137765511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:35,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:35,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 21:19:35,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783025175] [2024-06-21 21:19:35,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:35,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 21:19:35,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:35,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 21:19:35,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 21:19:35,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 21:19:35,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states 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 21:19:35,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:35,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 21:19:35,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:35,383 INFO L124 PetriNetUnfolderBase]: 162/316 cut-off events. [2024-06-21 21:19:35,383 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-06-21 21:19:35,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 627 conditions, 316 events. 162/316 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1171 event pairs, 97 based on Foata normal form. 1/303 useless extension candidates. Maximal degree in co-relation 616. Up to 288 conditions per place. [2024-06-21 21:19:35,387 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 21 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2024-06-21 21:19:35,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 29 transitions, 115 flow [2024-06-21 21:19:35,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 21:19:35,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 21:19:35,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2024-06-21 21:19:35,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5698924731182796 [2024-06-21 21:19:35,398 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 52 flow. Second operand 3 states and 53 transitions. [2024-06-21 21:19:35,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 29 transitions, 115 flow [2024-06-21 21:19:35,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 29 transitions, 112 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-21 21:19:35,401 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 71 flow [2024-06-21 21:19:35,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=31, PETRI_TRANSITIONS=25} [2024-06-21 21:19:35,405 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2024-06-21 21:19:35,406 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 71 flow [2024-06-21 21:19:35,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states 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 21:19:35,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:35,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:35,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 21:19:35,407 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 21:19:35,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:35,407 INFO L85 PathProgramCache]: Analyzing trace with hash -2044034496, now seen corresponding path program 1 times [2024-06-21 21:19:35,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:35,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687756574] [2024-06-21 21:19:35,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:35,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:35,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:35,709 INFO 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 21:19:35,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:35,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687756574] [2024-06-21 21:19:35,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687756574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:35,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:35,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 21:19:35,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552852349] [2024-06-21 21:19:35,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:35,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 21:19:35,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:35,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 21:19:35,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 21:19:35,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 21:19:35,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 71 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 21:19:35,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:35,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 21:19:35,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:35,802 INFO L124 PetriNetUnfolderBase]: 213/381 cut-off events. [2024-06-21 21:19:35,802 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2024-06-21 21:19:35,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 877 conditions, 381 events. 213/381 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1345 event pairs, 109 based on Foata normal form. 2/382 useless extension candidates. Maximal degree in co-relation 865. Up to 364 conditions per place. [2024-06-21 21:19:35,805 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 27 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2024-06-21 21:19:35,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 35 transitions, 161 flow [2024-06-21 21:19:35,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 21:19:35,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 21:19:35,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2024-06-21 21:19:35,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 21:19:35,807 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 71 flow. Second operand 4 states and 62 transitions. [2024-06-21 21:19:35,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 35 transitions, 161 flow [2024-06-21 21:19:35,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 21:19:35,809 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 95 flow [2024-06-21 21:19:35,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2024-06-21 21:19:35,809 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2024-06-21 21:19:35,810 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 95 flow [2024-06-21 21:19:35,810 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 21:19:35,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:35,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:35,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 21:19:35,810 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 21:19:35,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:35,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1059440774, now seen corresponding path program 1 times [2024-06-21 21:19:35,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:35,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401177537] [2024-06-21 21:19:35,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:35,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:35,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:36,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:36,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:36,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401177537] [2024-06-21 21:19:36,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401177537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:36,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:36,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 21:19:36,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902579417] [2024-06-21 21:19:36,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:36,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 21:19:36,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:36,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 21:19:36,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 21:19:36,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 21:19:36,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 95 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 21:19:36,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:36,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 21:19:36,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:36,337 INFO L124 PetriNetUnfolderBase]: 207/371 cut-off events. [2024-06-21 21:19:36,337 INFO L125 PetriNetUnfolderBase]: For 219/219 co-relation queries the response was YES. [2024-06-21 21:19:36,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 944 conditions, 371 events. 207/371 cut-off events. For 219/219 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1274 event pairs, 61 based on Foata normal form. 4/374 useless extension candidates. Maximal degree in co-relation 930. Up to 336 conditions per place. [2024-06-21 21:19:36,340 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 32 selfloop transitions, 7 changer transitions 0/42 dead transitions. [2024-06-21 21:19:36,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 42 transitions, 213 flow [2024-06-21 21:19:36,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:19:36,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:19:36,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 76 transitions. [2024-06-21 21:19:36,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49032258064516127 [2024-06-21 21:19:36,342 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 95 flow. Second operand 5 states and 76 transitions. [2024-06-21 21:19:36,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 42 transitions, 213 flow [2024-06-21 21:19:36,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 42 transitions, 204 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 21:19:36,344 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 119 flow [2024-06-21 21:19:36,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=119, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2024-06-21 21:19:36,345 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2024-06-21 21:19:36,345 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 119 flow [2024-06-21 21:19:36,345 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 21:19:36,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:36,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:36,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 21:19:36,346 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 21:19:36,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:36,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1503579947, now seen corresponding path program 1 times [2024-06-21 21:19:36,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:36,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383621142] [2024-06-21 21:19:36,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:36,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:36,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:37,143 INFO 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 21:19:37,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:37,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383621142] [2024-06-21 21:19:37,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383621142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:37,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:37,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:19:37,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881324501] [2024-06-21 21:19:37,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:37,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:19:37,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:37,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:19:37,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:19:37,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 21:19:37,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 119 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 21:19:37,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:37,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 21:19:37,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:37,331 INFO L124 PetriNetUnfolderBase]: 203/363 cut-off events. [2024-06-21 21:19:37,332 INFO L125 PetriNetUnfolderBase]: For 359/359 co-relation queries the response was YES. [2024-06-21 21:19:37,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1005 conditions, 363 events. 203/363 cut-off events. For 359/359 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1228 event pairs, 36 based on Foata normal form. 4/366 useless extension candidates. Maximal degree in co-relation 990. Up to 310 conditions per place. [2024-06-21 21:19:37,334 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 32 selfloop transitions, 8 changer transitions 0/43 dead transitions. [2024-06-21 21:19:37,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 43 transitions, 227 flow [2024-06-21 21:19:37,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:19:37,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:19:37,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 84 transitions. [2024-06-21 21:19:37,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-06-21 21:19:37,336 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 119 flow. Second operand 6 states and 84 transitions. [2024-06-21 21:19:37,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 43 transitions, 227 flow [2024-06-21 21:19:37,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 43 transitions, 212 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 21:19:37,337 INFO L231 Difference]: Finished difference. Result has 39 places, 28 transitions, 116 flow [2024-06-21 21:19:37,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=116, PETRI_PLACES=39, PETRI_TRANSITIONS=28} [2024-06-21 21:19:37,338 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 9 predicate places. [2024-06-21 21:19:37,338 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 28 transitions, 116 flow [2024-06-21 21:19:37,339 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 21:19:37,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:37,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:37,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 21:19:37,339 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 21:19:37,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:37,340 INFO L85 PathProgramCache]: Analyzing trace with hash -57901863, now seen corresponding path program 1 times [2024-06-21 21:19:37,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:37,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786355120] [2024-06-21 21:19:37,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:37,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:37,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:37,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:37,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:37,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786355120] [2024-06-21 21:19:37,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786355120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:37,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:37,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:19:37,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130633694] [2024-06-21 21:19:37,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:37,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:19:37,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:37,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:19:37,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:19:37,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 21:19:37,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 28 transitions, 116 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 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 21:19:37,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:37,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 21:19:37,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:37,896 INFO L124 PetriNetUnfolderBase]: 147/294 cut-off events. [2024-06-21 21:19:37,897 INFO L125 PetriNetUnfolderBase]: For 377/377 co-relation queries the response was YES. [2024-06-21 21:19:37,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 821 conditions, 294 events. 147/294 cut-off events. For 377/377 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1053 event pairs, 53 based on Foata normal form. 1/288 useless extension candidates. Maximal degree in co-relation 804. Up to 259 conditions per place. [2024-06-21 21:19:37,898 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 25 selfloop transitions, 6 changer transitions 0/35 dead transitions. [2024-06-21 21:19:37,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 35 transitions, 196 flow [2024-06-21 21:19:37,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:19:37,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:19:37,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 63 transitions. [2024-06-21 21:19:37,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4064516129032258 [2024-06-21 21:19:37,901 INFO L175 Difference]: Start difference. First operand has 39 places, 28 transitions, 116 flow. Second operand 5 states and 63 transitions. [2024-06-21 21:19:37,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 35 transitions, 196 flow [2024-06-21 21:19:37,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 35 transitions, 176 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 21:19:37,907 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 123 flow [2024-06-21 21:19:37,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=123, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2024-06-21 21:19:37,909 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2024-06-21 21:19:37,911 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 123 flow [2024-06-21 21:19:37,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 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 21:19:37,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:37,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:37,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 21:19:37,916 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 21:19:37,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:37,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1794956527, now seen corresponding path program 1 times [2024-06-21 21:19:37,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:37,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224901780] [2024-06-21 21:19:37,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:37,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:37,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:38,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:38,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:38,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224901780] [2024-06-21 21:19:38,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224901780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:38,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:38,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:19:38,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267060975] [2024-06-21 21:19:38,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:38,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:19:38,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:38,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:19:38,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:19:38,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:19:38,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 123 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 21:19:38,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:38,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:19:38,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:38,539 INFO L124 PetriNetUnfolderBase]: 203/365 cut-off events. [2024-06-21 21:19:38,540 INFO L125 PetriNetUnfolderBase]: For 707/707 co-relation queries the response was YES. [2024-06-21 21:19:38,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1105 conditions, 365 events. 203/365 cut-off events. For 707/707 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1263 event pairs, 71 based on Foata normal form. 2/366 useless extension candidates. Maximal degree in co-relation 1086. Up to 327 conditions per place. [2024-06-21 21:19:38,557 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 29 selfloop transitions, 14 changer transitions 0/45 dead transitions. [2024-06-21 21:19:38,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 271 flow [2024-06-21 21:19:38,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:19:38,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:19:38,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 75 transitions. [2024-06-21 21:19:38,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3456221198156682 [2024-06-21 21:19:38,558 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 123 flow. Second operand 7 states and 75 transitions. [2024-06-21 21:19:38,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 271 flow [2024-06-21 21:19:38,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 45 transitions, 258 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-21 21:19:38,560 INFO L231 Difference]: Finished difference. Result has 46 places, 38 transitions, 197 flow [2024-06-21 21:19:38,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=197, PETRI_PLACES=46, PETRI_TRANSITIONS=38} [2024-06-21 21:19:38,561 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 16 predicate places. [2024-06-21 21:19:38,561 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 38 transitions, 197 flow [2024-06-21 21:19:38,561 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 21:19:38,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:38,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:38,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 21:19:38,562 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 21:19:38,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:38,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1238468098, now seen corresponding path program 1 times [2024-06-21 21:19:38,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:38,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858360541] [2024-06-21 21:19:38,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:38,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:38,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:39,003 INFO 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 21:19:39,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:39,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858360541] [2024-06-21 21:19:39,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858360541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:39,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:39,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:19:39,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938569767] [2024-06-21 21:19:39,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:39,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:19:39,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:39,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:19:39,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:19:39,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:19:39,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 38 transitions, 197 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 21:19:39,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:39,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:19:39,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:39,195 INFO L124 PetriNetUnfolderBase]: 210/377 cut-off events. [2024-06-21 21:19:39,195 INFO L125 PetriNetUnfolderBase]: For 1012/1012 co-relation queries the response was YES. [2024-06-21 21:19:39,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1309 conditions, 377 events. 210/377 cut-off events. For 1012/1012 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1290 event pairs, 75 based on Foata normal form. 1/377 useless extension candidates. Maximal degree in co-relation 1287. Up to 354 conditions per place. [2024-06-21 21:19:39,198 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 38 selfloop transitions, 12 changer transitions 0/52 dead transitions. [2024-06-21 21:19:39,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 52 transitions, 356 flow [2024-06-21 21:19:39,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:19:39,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:19:39,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 75 transitions. [2024-06-21 21:19:39,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3456221198156682 [2024-06-21 21:19:39,200 INFO L175 Difference]: Start difference. First operand has 46 places, 38 transitions, 197 flow. Second operand 7 states and 75 transitions. [2024-06-21 21:19:39,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 52 transitions, 356 flow [2024-06-21 21:19:39,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 52 transitions, 348 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-21 21:19:39,202 INFO L231 Difference]: Finished difference. Result has 53 places, 43 transitions, 264 flow [2024-06-21 21:19:39,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=264, PETRI_PLACES=53, PETRI_TRANSITIONS=43} [2024-06-21 21:19:39,203 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 23 predicate places. [2024-06-21 21:19:39,203 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 43 transitions, 264 flow [2024-06-21 21:19:39,203 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 21:19:39,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:39,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:39,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 21:19:39,204 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 21:19:39,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:39,204 INFO L85 PathProgramCache]: Analyzing trace with hash -396616318, now seen corresponding path program 2 times [2024-06-21 21:19:39,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:39,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473068971] [2024-06-21 21:19:39,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:39,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:39,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:39,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:39,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:39,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473068971] [2024-06-21 21:19:39,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473068971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:39,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:39,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:19:39,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564057691] [2024-06-21 21:19:39,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:39,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:19:39,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:39,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:19:39,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:19:39,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:19:39,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 43 transitions, 264 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 21:19:39,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:39,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:19:39,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:39,841 INFO L124 PetriNetUnfolderBase]: 213/382 cut-off events. [2024-06-21 21:19:39,841 INFO L125 PetriNetUnfolderBase]: For 1387/1387 co-relation queries the response was YES. [2024-06-21 21:19:39,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1418 conditions, 382 events. 213/382 cut-off events. For 1387/1387 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1310 event pairs, 74 based on Foata normal form. 1/382 useless extension candidates. Maximal degree in co-relation 1392. Up to 356 conditions per place. [2024-06-21 21:19:39,843 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 37 selfloop transitions, 13 changer transitions 0/52 dead transitions. [2024-06-21 21:19:39,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 52 transitions, 401 flow [2024-06-21 21:19:39,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:19:39,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:19:39,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 66 transitions. [2024-06-21 21:19:39,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 21:19:39,845 INFO L175 Difference]: Start difference. First operand has 53 places, 43 transitions, 264 flow. Second operand 6 states and 66 transitions. [2024-06-21 21:19:39,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 52 transitions, 401 flow [2024-06-21 21:19:39,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 52 transitions, 378 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 21:19:39,847 INFO L231 Difference]: Finished difference. Result has 55 places, 45 transitions, 298 flow [2024-06-21 21:19:39,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=298, PETRI_PLACES=55, PETRI_TRANSITIONS=45} [2024-06-21 21:19:39,848 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 25 predicate places. [2024-06-21 21:19:39,848 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 45 transitions, 298 flow [2024-06-21 21:19:39,848 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 21:19:39,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:39,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:39,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 21:19:39,849 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 21:19:39,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:39,849 INFO L85 PathProgramCache]: Analyzing trace with hash 190915832, now seen corresponding path program 3 times [2024-06-21 21:19:39,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:39,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106193357] [2024-06-21 21:19:39,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:39,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:39,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:40,300 INFO 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 21:19:40,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:40,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106193357] [2024-06-21 21:19:40,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106193357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:40,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:40,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:19:40,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695482413] [2024-06-21 21:19:40,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:40,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:19:40,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:40,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:19:40,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:19:40,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:19:40,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 45 transitions, 298 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 21:19:40,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:40,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:19:40,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:40,471 INFO L124 PetriNetUnfolderBase]: 208/374 cut-off events. [2024-06-21 21:19:40,471 INFO L125 PetriNetUnfolderBase]: For 1731/1731 co-relation queries the response was YES. [2024-06-21 21:19:40,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1425 conditions, 374 events. 208/374 cut-off events. For 1731/1731 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1282 event pairs, 77 based on Foata normal form. 2/375 useless extension candidates. Maximal degree in co-relation 1398. Up to 329 conditions per place. [2024-06-21 21:19:40,473 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 30 selfloop transitions, 19 changer transitions 0/51 dead transitions. [2024-06-21 21:19:40,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 51 transitions, 417 flow [2024-06-21 21:19:40,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:19:40,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:19:40,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 74 transitions. [2024-06-21 21:19:40,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34101382488479265 [2024-06-21 21:19:40,474 INFO L175 Difference]: Start difference. First operand has 55 places, 45 transitions, 298 flow. Second operand 7 states and 74 transitions. [2024-06-21 21:19:40,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 51 transitions, 417 flow [2024-06-21 21:19:40,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 51 transitions, 383 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 21:19:40,477 INFO L231 Difference]: Finished difference. Result has 58 places, 45 transitions, 311 flow [2024-06-21 21:19:40,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=311, PETRI_PLACES=58, PETRI_TRANSITIONS=45} [2024-06-21 21:19:40,477 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 28 predicate places. [2024-06-21 21:19:40,477 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 45 transitions, 311 flow [2024-06-21 21:19:40,478 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 21:19:40,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:40,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:40,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 21:19:40,478 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 21:19:40,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:40,478 INFO L85 PathProgramCache]: Analyzing trace with hash -390894462, now seen corresponding path program 1 times [2024-06-21 21:19:40,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:40,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890302881] [2024-06-21 21:19:40,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:40,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:40,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:40,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:40,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:40,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890302881] [2024-06-21 21:19:40,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890302881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:40,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:40,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:19:40,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352559738] [2024-06-21 21:19:40,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:40,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:19:40,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:40,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:19:40,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:19:40,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:19:40,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 45 transitions, 311 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 21:19:40,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:40,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:19:40,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:41,111 INFO L124 PetriNetUnfolderBase]: 209/377 cut-off events. [2024-06-21 21:19:41,111 INFO L125 PetriNetUnfolderBase]: For 1671/1671 co-relation queries the response was YES. [2024-06-21 21:19:41,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1433 conditions, 377 events. 209/377 cut-off events. For 1671/1671 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1297 event pairs, 75 based on Foata normal form. 2/378 useless extension candidates. Maximal degree in co-relation 1405. Up to 319 conditions per place. [2024-06-21 21:19:41,113 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 32 selfloop transitions, 23 changer transitions 0/57 dead transitions. [2024-06-21 21:19:41,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 57 transitions, 477 flow [2024-06-21 21:19:41,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:19:41,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:19:41,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2024-06-21 21:19:41,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35944700460829493 [2024-06-21 21:19:41,115 INFO L175 Difference]: Start difference. First operand has 58 places, 45 transitions, 311 flow. Second operand 7 states and 78 transitions. [2024-06-21 21:19:41,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 57 transitions, 477 flow [2024-06-21 21:19:41,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 57 transitions, 426 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 21:19:41,118 INFO L231 Difference]: Finished difference. Result has 59 places, 50 transitions, 342 flow [2024-06-21 21:19:41,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=342, PETRI_PLACES=59, PETRI_TRANSITIONS=50} [2024-06-21 21:19:41,118 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 29 predicate places. [2024-06-21 21:19:41,118 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 50 transitions, 342 flow [2024-06-21 21:19:41,119 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 21:19:41,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:41,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:41,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 21:19:41,119 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 21:19:41,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:41,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1947143788, now seen corresponding path program 1 times [2024-06-21 21:19:41,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:41,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172029000] [2024-06-21 21:19:41,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:41,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:41,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:41,592 INFO 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 21:19:41,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:41,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172029000] [2024-06-21 21:19:41,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172029000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:41,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:41,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:19:41,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882107165] [2024-06-21 21:19:41,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:41,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:19:41,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:41,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:19:41,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:19:41,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:19:41,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 50 transitions, 342 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 21:19:41,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:41,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:19:41,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:41,823 INFO L124 PetriNetUnfolderBase]: 215/386 cut-off events. [2024-06-21 21:19:41,823 INFO L125 PetriNetUnfolderBase]: For 2018/2018 co-relation queries the response was YES. [2024-06-21 21:19:41,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1546 conditions, 386 events. 215/386 cut-off events. For 2018/2018 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1323 event pairs, 50 based on Foata normal form. 2/387 useless extension candidates. Maximal degree in co-relation 1517. Up to 339 conditions per place. [2024-06-21 21:19:41,825 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 50 selfloop transitions, 15 changer transitions 0/67 dead transitions. [2024-06-21 21:19:41,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 67 transitions, 524 flow [2024-06-21 21:19:41,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:19:41,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:19:41,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 79 transitions. [2024-06-21 21:19:41,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3640552995391705 [2024-06-21 21:19:41,827 INFO L175 Difference]: Start difference. First operand has 59 places, 50 transitions, 342 flow. Second operand 7 states and 79 transitions. [2024-06-21 21:19:41,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 67 transitions, 524 flow [2024-06-21 21:19:41,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 67 transitions, 498 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 21:19:41,831 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 378 flow [2024-06-21 21:19:41,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=378, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2024-06-21 21:19:41,832 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 34 predicate places. [2024-06-21 21:19:41,832 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 378 flow [2024-06-21 21:19:41,833 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 21:19:41,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:41,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:41,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 21:19:41,833 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 21:19:41,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:41,834 INFO L85 PathProgramCache]: Analyzing trace with hash 760499500, now seen corresponding path program 2 times [2024-06-21 21:19:41,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:41,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622337797] [2024-06-21 21:19:41,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:41,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:41,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:42,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:42,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:42,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622337797] [2024-06-21 21:19:42,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622337797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:42,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:42,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:19:42,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723401700] [2024-06-21 21:19:42,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:42,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:19:42,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:42,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:19:42,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:19:42,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:19:42,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 378 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 21:19:42,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:42,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:19:42,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:42,543 INFO L124 PetriNetUnfolderBase]: 240/430 cut-off events. [2024-06-21 21:19:42,544 INFO L125 PetriNetUnfolderBase]: For 2636/2636 co-relation queries the response was YES. [2024-06-21 21:19:42,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1858 conditions, 430 events. 240/430 cut-off events. For 2636/2636 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1562 event pairs, 53 based on Foata normal form. 2/431 useless extension candidates. Maximal degree in co-relation 1826. Up to 361 conditions per place. [2024-06-21 21:19:42,546 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 52 selfloop transitions, 24 changer transitions 0/78 dead transitions. [2024-06-21 21:19:42,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 78 transitions, 675 flow [2024-06-21 21:19:42,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:19:42,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:19:42,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 90 transitions. [2024-06-21 21:19:42,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3629032258064516 [2024-06-21 21:19:42,548 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 378 flow. Second operand 8 states and 90 transitions. [2024-06-21 21:19:42,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 78 transitions, 675 flow [2024-06-21 21:19:42,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 78 transitions, 644 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 21:19:42,551 INFO L231 Difference]: Finished difference. Result has 72 places, 66 transitions, 522 flow [2024-06-21 21:19:42,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=522, PETRI_PLACES=72, PETRI_TRANSITIONS=66} [2024-06-21 21:19:42,552 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 42 predicate places. [2024-06-21 21:19:42,552 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 66 transitions, 522 flow [2024-06-21 21:19:42,552 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 21:19:42,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:42,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:42,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 21:19:42,553 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 21:19:42,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:42,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1623424536, now seen corresponding path program 3 times [2024-06-21 21:19:42,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:42,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608558552] [2024-06-21 21:19:42,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:42,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:42,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:43,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:43,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:43,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608558552] [2024-06-21 21:19:43,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608558552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:43,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:43,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:19:43,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185257297] [2024-06-21 21:19:43,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:43,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:19:43,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:43,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:19:43,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:19:43,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:19:43,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 66 transitions, 522 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 21:19:43,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:43,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:19:43,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:43,192 INFO L124 PetriNetUnfolderBase]: 252/450 cut-off events. [2024-06-21 21:19:43,192 INFO L125 PetriNetUnfolderBase]: For 3415/3415 co-relation queries the response was YES. [2024-06-21 21:19:43,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2062 conditions, 450 events. 252/450 cut-off events. For 3415/3415 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1658 event pairs, 52 based on Foata normal form. 4/453 useless extension candidates. Maximal degree in co-relation 2026. Up to 296 conditions per place. [2024-06-21 21:19:43,195 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 52 selfloop transitions, 27 changer transitions 0/81 dead transitions. [2024-06-21 21:19:43,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 81 transitions, 770 flow [2024-06-21 21:19:43,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:19:43,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:19:43,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2024-06-21 21:19:43,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3778801843317972 [2024-06-21 21:19:43,196 INFO L175 Difference]: Start difference. First operand has 72 places, 66 transitions, 522 flow. Second operand 7 states and 82 transitions. [2024-06-21 21:19:43,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 81 transitions, 770 flow [2024-06-21 21:19:43,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 81 transitions, 749 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-21 21:19:43,201 INFO L231 Difference]: Finished difference. Result has 77 places, 71 transitions, 601 flow [2024-06-21 21:19:43,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=501, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=601, PETRI_PLACES=77, PETRI_TRANSITIONS=71} [2024-06-21 21:19:43,202 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 47 predicate places. [2024-06-21 21:19:43,202 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 71 transitions, 601 flow [2024-06-21 21:19:43,202 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 21:19:43,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:43,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:43,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 21:19:43,202 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 21:19:43,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:43,203 INFO L85 PathProgramCache]: Analyzing trace with hash -262193586, now seen corresponding path program 4 times [2024-06-21 21:19:43,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:43,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593734713] [2024-06-21 21:19:43,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:43,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:43,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:43,623 INFO 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 21:19:43,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:43,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593734713] [2024-06-21 21:19:43,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593734713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:43,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:43,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:19:43,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519430036] [2024-06-21 21:19:43,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:43,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:19:43,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:43,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:19:43,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:19:43,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:19:43,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 71 transitions, 601 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 21:19:43,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:43,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:19:43,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:43,865 INFO L124 PetriNetUnfolderBase]: 253/452 cut-off events. [2024-06-21 21:19:43,866 INFO L125 PetriNetUnfolderBase]: For 3854/3854 co-relation queries the response was YES. [2024-06-21 21:19:43,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2196 conditions, 452 events. 253/452 cut-off events. For 3854/3854 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1652 event pairs, 50 based on Foata normal form. 2/453 useless extension candidates. Maximal degree in co-relation 2158. Up to 383 conditions per place. [2024-06-21 21:19:43,869 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 63 selfloop transitions, 24 changer transitions 0/89 dead transitions. [2024-06-21 21:19:43,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 89 transitions, 884 flow [2024-06-21 21:19:43,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:19:43,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:19:43,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 91 transitions. [2024-06-21 21:19:43,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36693548387096775 [2024-06-21 21:19:43,870 INFO L175 Difference]: Start difference. First operand has 77 places, 71 transitions, 601 flow. Second operand 8 states and 91 transitions. [2024-06-21 21:19:43,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 89 transitions, 884 flow [2024-06-21 21:19:43,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 89 transitions, 850 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 21:19:43,876 INFO L231 Difference]: Finished difference. Result has 82 places, 75 transitions, 668 flow [2024-06-21 21:19:43,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=567, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=668, PETRI_PLACES=82, PETRI_TRANSITIONS=75} [2024-06-21 21:19:43,877 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 52 predicate places. [2024-06-21 21:19:43,877 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 75 transitions, 668 flow [2024-06-21 21:19:43,877 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 21:19:43,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:43,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:43,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 21:19:43,878 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 21:19:43,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:43,878 INFO L85 PathProgramCache]: Analyzing trace with hash 767174854, now seen corresponding path program 1 times [2024-06-21 21:19:43,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:43,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130512948] [2024-06-21 21:19:43,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:43,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:43,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:44,390 INFO 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 21:19:44,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:44,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130512948] [2024-06-21 21:19:44,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130512948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:44,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:44,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:19:44,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190213822] [2024-06-21 21:19:44,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:44,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:19:44,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:44,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:19:44,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:19:44,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:19:44,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 75 transitions, 668 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 21:19:44,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:44,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:19:44,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:44,569 INFO L124 PetriNetUnfolderBase]: 254/453 cut-off events. [2024-06-21 21:19:44,569 INFO L125 PetriNetUnfolderBase]: For 4285/4285 co-relation queries the response was YES. [2024-06-21 21:19:44,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2258 conditions, 453 events. 254/453 cut-off events. For 4285/4285 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1657 event pairs, 52 based on Foata normal form. 2/454 useless extension candidates. Maximal degree in co-relation 2218. Up to 382 conditions per place. [2024-06-21 21:19:44,572 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 59 selfloop transitions, 27 changer transitions 0/88 dead transitions. [2024-06-21 21:19:44,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 88 transitions, 914 flow [2024-06-21 21:19:44,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:19:44,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:19:44,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 88 transitions. [2024-06-21 21:19:44,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 21:19:44,574 INFO L175 Difference]: Start difference. First operand has 82 places, 75 transitions, 668 flow. Second operand 8 states and 88 transitions. [2024-06-21 21:19:44,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 88 transitions, 914 flow [2024-06-21 21:19:44,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 88 transitions, 875 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 21:19:44,580 INFO L231 Difference]: Finished difference. Result has 87 places, 80 transitions, 725 flow [2024-06-21 21:19:44,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=629, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=725, PETRI_PLACES=87, PETRI_TRANSITIONS=80} [2024-06-21 21:19:44,581 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 57 predicate places. [2024-06-21 21:19:44,581 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 80 transitions, 725 flow [2024-06-21 21:19:44,581 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 21:19:44,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:44,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:44,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 21:19:44,582 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 21:19:44,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:44,582 INFO L85 PathProgramCache]: Analyzing trace with hash 231826145, now seen corresponding path program 1 times [2024-06-21 21:19:44,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:44,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953818060] [2024-06-21 21:19:44,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:44,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:44,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:45,208 INFO 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 21:19:45,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:45,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953818060] [2024-06-21 21:19:45,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953818060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:45,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:45,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:19:45,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001506617] [2024-06-21 21:19:45,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:45,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:19:45,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:45,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:19:45,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:19:45,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:19:45,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 80 transitions, 725 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 21:19:45,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:45,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:19:45,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:45,500 INFO L124 PetriNetUnfolderBase]: 250/448 cut-off events. [2024-06-21 21:19:45,501 INFO L125 PetriNetUnfolderBase]: For 4562/4562 co-relation queries the response was YES. [2024-06-21 21:19:45,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2286 conditions, 448 events. 250/448 cut-off events. For 4562/4562 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1627 event pairs, 51 based on Foata normal form. 2/449 useless extension candidates. Maximal degree in co-relation 2245. Up to 380 conditions per place. [2024-06-21 21:19:45,504 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 64 selfloop transitions, 25 changer transitions 0/91 dead transitions. [2024-06-21 21:19:45,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 91 transitions, 933 flow [2024-06-21 21:19:45,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:19:45,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:19:45,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 79 transitions. [2024-06-21 21:19:45,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3640552995391705 [2024-06-21 21:19:45,505 INFO L175 Difference]: Start difference. First operand has 87 places, 80 transitions, 725 flow. Second operand 7 states and 79 transitions. [2024-06-21 21:19:45,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 91 transitions, 933 flow [2024-06-21 21:19:45,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 91 transitions, 889 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 21:19:45,526 INFO L231 Difference]: Finished difference. Result has 90 places, 80 transitions, 745 flow [2024-06-21 21:19:45,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=681, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=745, PETRI_PLACES=90, PETRI_TRANSITIONS=80} [2024-06-21 21:19:45,526 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 60 predicate places. [2024-06-21 21:19:45,527 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 80 transitions, 745 flow [2024-06-21 21:19:45,527 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 21:19:45,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:45,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:45,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 21:19:45,528 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 21:19:45,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:45,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1535782814, now seen corresponding path program 1 times [2024-06-21 21:19:45,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:45,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192357581] [2024-06-21 21:19:45,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:45,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:45,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:45,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:46,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:46,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192357581] [2024-06-21 21:19:46,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192357581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:46,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:46,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:19:46,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810248466] [2024-06-21 21:19:46,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:46,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:19:46,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:46,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:19:46,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:19:46,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:19:46,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 80 transitions, 745 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 21:19:46,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:46,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:19:46,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:46,223 INFO L124 PetriNetUnfolderBase]: 256/457 cut-off events. [2024-06-21 21:19:46,224 INFO L125 PetriNetUnfolderBase]: For 5192/5192 co-relation queries the response was YES. [2024-06-21 21:19:46,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2400 conditions, 457 events. 256/457 cut-off events. For 5192/5192 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1684 event pairs, 52 based on Foata normal form. 2/458 useless extension candidates. Maximal degree in co-relation 2357. Up to 384 conditions per place. [2024-06-21 21:19:46,227 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 69 selfloop transitions, 22 changer transitions 0/93 dead transitions. [2024-06-21 21:19:46,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 93 transitions, 983 flow [2024-06-21 21:19:46,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:19:46,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:19:46,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2024-06-21 21:19:46,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35944700460829493 [2024-06-21 21:19:46,228 INFO L175 Difference]: Start difference. First operand has 90 places, 80 transitions, 745 flow. Second operand 7 states and 78 transitions. [2024-06-21 21:19:46,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 93 transitions, 983 flow [2024-06-21 21:19:46,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 93 transitions, 941 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 21:19:46,235 INFO L231 Difference]: Finished difference. Result has 92 places, 82 transitions, 775 flow [2024-06-21 21:19:46,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=703, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=775, PETRI_PLACES=92, PETRI_TRANSITIONS=82} [2024-06-21 21:19:46,236 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 62 predicate places. [2024-06-21 21:19:46,236 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 82 transitions, 775 flow [2024-06-21 21:19:46,236 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 21:19:46,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:46,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:46,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 21:19:46,237 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 21:19:46,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:46,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1905629726, now seen corresponding path program 2 times [2024-06-21 21:19:46,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:46,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136061389] [2024-06-21 21:19:46,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:46,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:46,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:46,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:46,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:46,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136061389] [2024-06-21 21:19:46,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136061389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:46,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:46,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:19:46,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415448832] [2024-06-21 21:19:46,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:46,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:19:46,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:46,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:19:46,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:19:46,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:19:46,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 82 transitions, 775 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 21:19:46,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:46,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:19:46,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:46,874 INFO L124 PetriNetUnfolderBase]: 267/476 cut-off events. [2024-06-21 21:19:46,874 INFO L125 PetriNetUnfolderBase]: For 6043/6043 co-relation queries the response was YES. [2024-06-21 21:19:46,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2561 conditions, 476 events. 267/476 cut-off events. For 6043/6043 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1787 event pairs, 60 based on Foata normal form. 2/477 useless extension candidates. Maximal degree in co-relation 2517. Up to 316 conditions per place. [2024-06-21 21:19:46,878 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 58 selfloop transitions, 37 changer transitions 0/97 dead transitions. [2024-06-21 21:19:46,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 97 transitions, 1103 flow [2024-06-21 21:19:46,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:19:46,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:19:46,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2024-06-21 21:19:46,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3824884792626728 [2024-06-21 21:19:46,879 INFO L175 Difference]: Start difference. First operand has 92 places, 82 transitions, 775 flow. Second operand 7 states and 83 transitions. [2024-06-21 21:19:46,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 97 transitions, 1103 flow [2024-06-21 21:19:46,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 97 transitions, 1053 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 21:19:46,888 INFO L231 Difference]: Finished difference. Result has 94 places, 86 transitions, 850 flow [2024-06-21 21:19:46,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=850, PETRI_PLACES=94, PETRI_TRANSITIONS=86} [2024-06-21 21:19:46,889 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 64 predicate places. [2024-06-21 21:19:46,889 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 86 transitions, 850 flow [2024-06-21 21:19:46,889 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 21:19:46,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:46,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:46,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 21:19:46,890 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 21:19:46,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:46,890 INFO L85 PathProgramCache]: Analyzing trace with hash -971235778, now seen corresponding path program 3 times [2024-06-21 21:19:46,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:46,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248797329] [2024-06-21 21:19:46,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:46,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:46,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:47,349 INFO 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 21:19:47,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:47,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248797329] [2024-06-21 21:19:47,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248797329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:47,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:47,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:19:47,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537814473] [2024-06-21 21:19:47,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:47,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:19:47,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:47,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:19:47,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:19:47,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:19:47,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 86 transitions, 850 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 21:19:47,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:47,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:19:47,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:47,551 INFO L124 PetriNetUnfolderBase]: 263/470 cut-off events. [2024-06-21 21:19:47,552 INFO L125 PetriNetUnfolderBase]: For 6454/6454 co-relation queries the response was YES. [2024-06-21 21:19:47,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2578 conditions, 470 events. 263/470 cut-off events. For 6454/6454 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1763 event pairs, 57 based on Foata normal form. 2/471 useless extension candidates. Maximal degree in co-relation 2533. Up to 313 conditions per place. [2024-06-21 21:19:47,555 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 51 selfloop transitions, 43 changer transitions 0/96 dead transitions. [2024-06-21 21:19:47,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 96 transitions, 1100 flow [2024-06-21 21:19:47,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:19:47,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:19:47,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2024-06-21 21:19:47,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3824884792626728 [2024-06-21 21:19:47,556 INFO L175 Difference]: Start difference. First operand has 94 places, 86 transitions, 850 flow. Second operand 7 states and 83 transitions. [2024-06-21 21:19:47,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 96 transitions, 1100 flow [2024-06-21 21:19:47,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 96 transitions, 1041 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 21:19:47,566 INFO L231 Difference]: Finished difference. Result has 98 places, 86 transitions, 882 flow [2024-06-21 21:19:47,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=791, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=882, PETRI_PLACES=98, PETRI_TRANSITIONS=86} [2024-06-21 21:19:47,566 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 68 predicate places. [2024-06-21 21:19:47,567 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 86 transitions, 882 flow [2024-06-21 21:19:47,567 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 21:19:47,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:47,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:47,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 21:19:47,567 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 21:19:47,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:47,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1205821353, now seen corresponding path program 1 times [2024-06-21 21:19:47,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:47,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585943352] [2024-06-21 21:19:47,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:47,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:47,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:48,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:48,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:48,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585943352] [2024-06-21 21:19:48,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585943352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:48,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:48,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:19:48,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264318042] [2024-06-21 21:19:48,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:48,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:19:48,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:48,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:19:48,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:19:48,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:19:48,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 86 transitions, 882 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 21:19:48,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:48,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:19:48,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:48,304 INFO L124 PetriNetUnfolderBase]: 266/473 cut-off events. [2024-06-21 21:19:48,304 INFO L125 PetriNetUnfolderBase]: For 6897/6897 co-relation queries the response was YES. [2024-06-21 21:19:48,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2654 conditions, 473 events. 266/473 cut-off events. For 6897/6897 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1752 event pairs, 54 based on Foata normal form. 1/473 useless extension candidates. Maximal degree in co-relation 2608. Up to 415 conditions per place. [2024-06-21 21:19:48,307 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 69 selfloop transitions, 25 changer transitions 0/96 dead transitions. [2024-06-21 21:19:48,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 96 transitions, 1138 flow [2024-06-21 21:19:48,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:19:48,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:19:48,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 86 transitions. [2024-06-21 21:19:48,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3467741935483871 [2024-06-21 21:19:48,308 INFO L175 Difference]: Start difference. First operand has 98 places, 86 transitions, 882 flow. Second operand 8 states and 86 transitions. [2024-06-21 21:19:48,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 96 transitions, 1138 flow [2024-06-21 21:19:48,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 96 transitions, 1028 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 21:19:48,318 INFO L231 Difference]: Finished difference. Result has 100 places, 88 transitions, 841 flow [2024-06-21 21:19:48,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=772, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=841, PETRI_PLACES=100, PETRI_TRANSITIONS=88} [2024-06-21 21:19:48,318 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 70 predicate places. [2024-06-21 21:19:48,318 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 88 transitions, 841 flow [2024-06-21 21:19:48,319 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 21:19:48,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:48,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:48,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 21:19:48,319 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 21:19:48,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:48,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1206088263, now seen corresponding path program 2 times [2024-06-21 21:19:48,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:48,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856423074] [2024-06-21 21:19:48,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:48,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:48,754 INFO 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 21:19:48,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:48,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856423074] [2024-06-21 21:19:48,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856423074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:48,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:48,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:19:48,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908100312] [2024-06-21 21:19:48,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:48,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:19:48,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:48,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:19:48,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:19:48,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:19:48,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 88 transitions, 841 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 21:19:48,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:48,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:19:48,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:48,919 INFO L124 PetriNetUnfolderBase]: 264/470 cut-off events. [2024-06-21 21:19:48,919 INFO L125 PetriNetUnfolderBase]: For 7106/7106 co-relation queries the response was YES. [2024-06-21 21:19:48,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2602 conditions, 470 events. 264/470 cut-off events. For 7106/7106 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1755 event pairs, 54 based on Foata normal form. 1/470 useless extension candidates. Maximal degree in co-relation 2555. Up to 413 conditions per place. [2024-06-21 21:19:48,922 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 69 selfloop transitions, 23 changer transitions 0/94 dead transitions. [2024-06-21 21:19:48,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 94 transitions, 1039 flow [2024-06-21 21:19:48,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:19:48,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:19:48,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 77 transitions. [2024-06-21 21:19:48,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 21:19:48,924 INFO L175 Difference]: Start difference. First operand has 100 places, 88 transitions, 841 flow. Second operand 7 states and 77 transitions. [2024-06-21 21:19:48,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 94 transitions, 1039 flow [2024-06-21 21:19:48,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 94 transitions, 983 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 21:19:48,934 INFO L231 Difference]: Finished difference. Result has 101 places, 88 transitions, 836 flow [2024-06-21 21:19:48,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=836, PETRI_PLACES=101, PETRI_TRANSITIONS=88} [2024-06-21 21:19:48,934 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 71 predicate places. [2024-06-21 21:19:48,935 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 88 transitions, 836 flow [2024-06-21 21:19:48,935 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 21:19:48,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:48,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:48,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 21:19:48,935 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 21:19:48,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:48,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1205811433, now seen corresponding path program 1 times [2024-06-21 21:19:48,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:48,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856842005] [2024-06-21 21:19:48,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:48,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:48,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:49,645 INFO 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 21:19:49,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:49,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856842005] [2024-06-21 21:19:49,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856842005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:49,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:49,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:19:49,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660190888] [2024-06-21 21:19:49,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:49,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:19:49,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:49,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:19:49,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:19:49,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:19:49,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 88 transitions, 836 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 21:19:49,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:49,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:19:49,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:49,869 INFO L124 PetriNetUnfolderBase]: 265/472 cut-off events. [2024-06-21 21:19:49,869 INFO L125 PetriNetUnfolderBase]: For 7728/7728 co-relation queries the response was YES. [2024-06-21 21:19:49,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2614 conditions, 472 events. 265/472 cut-off events. For 7728/7728 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1761 event pairs, 52 based on Foata normal form. 2/473 useless extension candidates. Maximal degree in co-relation 2566. Up to 395 conditions per place. [2024-06-21 21:19:49,872 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 67 selfloop transitions, 31 changer transitions 0/100 dead transitions. [2024-06-21 21:19:49,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 100 transitions, 1116 flow [2024-06-21 21:19:49,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:19:49,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:19:49,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2024-06-21 21:19:49,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34767025089605735 [2024-06-21 21:19:49,874 INFO L175 Difference]: Start difference. First operand has 101 places, 88 transitions, 836 flow. Second operand 9 states and 97 transitions. [2024-06-21 21:19:49,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 100 transitions, 1116 flow [2024-06-21 21:19:49,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 100 transitions, 1058 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 21:19:49,884 INFO L231 Difference]: Finished difference. Result has 104 places, 91 transitions, 876 flow [2024-06-21 21:19:49,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=778, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=876, PETRI_PLACES=104, PETRI_TRANSITIONS=91} [2024-06-21 21:19:49,885 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 74 predicate places. [2024-06-21 21:19:49,885 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 91 transitions, 876 flow [2024-06-21 21:19:49,885 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 21:19:49,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:49,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:49,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 21:19:49,886 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 21:19:49,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:49,886 INFO L85 PathProgramCache]: Analyzing trace with hash -48301489, now seen corresponding path program 1 times [2024-06-21 21:19:49,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:49,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799455171] [2024-06-21 21:19:49,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:49,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:49,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:50,579 INFO 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 21:19:50,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:50,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799455171] [2024-06-21 21:19:50,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799455171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:50,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:50,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:19:50,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408219946] [2024-06-21 21:19:50,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:50,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:19:50,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:50,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:19:50,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:19:50,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:19:50,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 91 transitions, 876 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 21:19:50,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:50,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:19:50,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:50,900 INFO L124 PetriNetUnfolderBase]: 269/482 cut-off events. [2024-06-21 21:19:50,901 INFO L125 PetriNetUnfolderBase]: For 8390/8390 co-relation queries the response was YES. [2024-06-21 21:19:50,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2742 conditions, 482 events. 269/482 cut-off events. For 8390/8390 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1824 event pairs, 31 based on Foata normal form. 2/483 useless extension candidates. Maximal degree in co-relation 2693. Up to 403 conditions per place. [2024-06-21 21:19:50,907 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 84 selfloop transitions, 19 changer transitions 0/105 dead transitions. [2024-06-21 21:19:50,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 105 transitions, 1128 flow [2024-06-21 21:19:50,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:19:50,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:19:50,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 85 transitions. [2024-06-21 21:19:50,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34274193548387094 [2024-06-21 21:19:50,908 INFO L175 Difference]: Start difference. First operand has 104 places, 91 transitions, 876 flow. Second operand 8 states and 85 transitions. [2024-06-21 21:19:50,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 105 transitions, 1128 flow [2024-06-21 21:19:50,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 105 transitions, 1052 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 21:19:50,921 INFO L231 Difference]: Finished difference. Result has 105 places, 92 transitions, 858 flow [2024-06-21 21:19:50,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=858, PETRI_PLACES=105, PETRI_TRANSITIONS=92} [2024-06-21 21:19:50,922 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 75 predicate places. [2024-06-21 21:19:50,922 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 92 transitions, 858 flow [2024-06-21 21:19:50,922 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 21:19:50,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:50,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:50,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 21:19:50,923 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 21:19:50,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:50,923 INFO L85 PathProgramCache]: Analyzing trace with hash -963533107, now seen corresponding path program 2 times [2024-06-21 21:19:50,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:50,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254061645] [2024-06-21 21:19:50,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:50,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:50,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:51,648 INFO 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 21:19:51,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:51,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254061645] [2024-06-21 21:19:51,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254061645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:51,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:51,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:19:51,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400012463] [2024-06-21 21:19:51,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:51,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:19:51,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:51,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:19:51,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:19:51,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:19:51,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 92 transitions, 858 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 21:19:51,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:51,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:19:51,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:51,966 INFO L124 PetriNetUnfolderBase]: 273/490 cut-off events. [2024-06-21 21:19:51,966 INFO L125 PetriNetUnfolderBase]: For 9214/9214 co-relation queries the response was YES. [2024-06-21 21:19:51,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2785 conditions, 490 events. 273/490 cut-off events. For 9214/9214 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1877 event pairs, 48 based on Foata normal form. 2/491 useless extension candidates. Maximal degree in co-relation 2735. Up to 423 conditions per place. [2024-06-21 21:19:51,970 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 82 selfloop transitions, 22 changer transitions 0/106 dead transitions. [2024-06-21 21:19:51,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 106 transitions, 1122 flow [2024-06-21 21:19:51,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:19:51,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:19:51,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 95 transitions. [2024-06-21 21:19:51,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34050179211469533 [2024-06-21 21:19:51,971 INFO L175 Difference]: Start difference. First operand has 105 places, 92 transitions, 858 flow. Second operand 9 states and 95 transitions. [2024-06-21 21:19:51,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 106 transitions, 1122 flow [2024-06-21 21:19:51,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 106 transitions, 1074 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 21:19:51,993 INFO L231 Difference]: Finished difference. Result has 108 places, 93 transitions, 877 flow [2024-06-21 21:19:51,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=877, PETRI_PLACES=108, PETRI_TRANSITIONS=93} [2024-06-21 21:19:51,994 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 78 predicate places. [2024-06-21 21:19:51,994 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 93 transitions, 877 flow [2024-06-21 21:19:51,994 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 21:19:51,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:51,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:51,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 21:19:51,994 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 21:19:51,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:51,995 INFO L85 PathProgramCache]: Analyzing trace with hash -960851793, now seen corresponding path program 1 times [2024-06-21 21:19:51,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:51,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021518727] [2024-06-21 21:19:51,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:51,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:52,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:52,668 INFO 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 21:19:52,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:52,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021518727] [2024-06-21 21:19:52,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021518727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:52,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:52,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:19:52,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009409411] [2024-06-21 21:19:52,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:52,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:19:52,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:52,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:19:52,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:19:52,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:19:52,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 93 transitions, 877 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 21:19:52,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:52,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:19:52,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:52,902 INFO L124 PetriNetUnfolderBase]: 271/485 cut-off events. [2024-06-21 21:19:52,902 INFO L125 PetriNetUnfolderBase]: For 9538/9538 co-relation queries the response was YES. [2024-06-21 21:19:52,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2772 conditions, 485 events. 271/485 cut-off events. For 9538/9538 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1838 event pairs, 48 based on Foata normal form. 1/485 useless extension candidates. Maximal degree in co-relation 2721. Up to 402 conditions per place. [2024-06-21 21:19:52,912 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 74 selfloop transitions, 27 changer transitions 0/103 dead transitions. [2024-06-21 21:19:52,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 103 transitions, 1107 flow [2024-06-21 21:19:52,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:19:52,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:19:52,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2024-06-21 21:19:52,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35944700460829493 [2024-06-21 21:19:52,913 INFO L175 Difference]: Start difference. First operand has 108 places, 93 transitions, 877 flow. Second operand 7 states and 78 transitions. [2024-06-21 21:19:52,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 103 transitions, 1107 flow [2024-06-21 21:19:52,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 103 transitions, 1056 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 21:19:52,927 INFO L231 Difference]: Finished difference. Result has 110 places, 93 transitions, 890 flow [2024-06-21 21:19:52,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=890, PETRI_PLACES=110, PETRI_TRANSITIONS=93} [2024-06-21 21:19:52,927 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 80 predicate places. [2024-06-21 21:19:52,927 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 93 transitions, 890 flow [2024-06-21 21:19:52,927 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 21:19:52,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:52,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:52,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 21:19:52,928 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 21:19:52,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:52,929 INFO L85 PathProgramCache]: Analyzing trace with hash -160727061, now seen corresponding path program 1 times [2024-06-21 21:19:52,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:52,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336138273] [2024-06-21 21:19:52,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:52,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:52,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:53,344 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 21:19:53,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:53,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336138273] [2024-06-21 21:19:53,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336138273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:53,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:53,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:19:53,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647068276] [2024-06-21 21:19:53,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:53,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:19:53,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:53,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:19:53,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:19:53,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:19:53,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 93 transitions, 890 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 21:19:53,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:53,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:19:53,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:53,558 INFO L124 PetriNetUnfolderBase]: 277/497 cut-off events. [2024-06-21 21:19:53,558 INFO L125 PetriNetUnfolderBase]: For 10562/10562 co-relation queries the response was YES. [2024-06-21 21:19:53,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2842 conditions, 497 events. 277/497 cut-off events. For 10562/10562 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1903 event pairs, 49 based on Foata normal form. 2/498 useless extension candidates. Maximal degree in co-relation 2790. Up to 415 conditions per place. [2024-06-21 21:19:53,562 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 82 selfloop transitions, 24 changer transitions 0/108 dead transitions. [2024-06-21 21:19:53,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 108 transitions, 1160 flow [2024-06-21 21:19:53,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:19:53,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:19:53,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2024-06-21 21:19:53,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35080645161290325 [2024-06-21 21:19:53,563 INFO L175 Difference]: Start difference. First operand has 110 places, 93 transitions, 890 flow. Second operand 8 states and 87 transitions. [2024-06-21 21:19:53,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 108 transitions, 1160 flow [2024-06-21 21:19:53,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 108 transitions, 1069 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 21:19:53,575 INFO L231 Difference]: Finished difference. Result has 111 places, 95 transitions, 870 flow [2024-06-21 21:19:53,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=799, PETRI_DIFFERENCE_MINUEND_PLACES=103, 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=870, PETRI_PLACES=111, PETRI_TRANSITIONS=95} [2024-06-21 21:19:53,576 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 81 predicate places. [2024-06-21 21:19:53,576 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 95 transitions, 870 flow [2024-06-21 21:19:53,576 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 21:19:53,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:53,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:53,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 21:19:53,576 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 21:19:53,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:53,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1024660835, now seen corresponding path program 2 times [2024-06-21 21:19:53,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:53,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084894467] [2024-06-21 21:19:53,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:53,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:53,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:54,044 INFO 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 21:19:54,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:54,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084894467] [2024-06-21 21:19:54,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084894467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:54,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:54,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:19:54,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532009333] [2024-06-21 21:19:54,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:54,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:19:54,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:54,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:19:54,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:19:54,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:19:54,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 95 transitions, 870 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 21:19:54,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:54,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:19:54,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:54,297 INFO L124 PetriNetUnfolderBase]: 293/524 cut-off events. [2024-06-21 21:19:54,297 INFO L125 PetriNetUnfolderBase]: For 11212/11212 co-relation queries the response was YES. [2024-06-21 21:19:54,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2993 conditions, 524 events. 293/524 cut-off events. For 11212/11212 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2056 event pairs, 52 based on Foata normal form. 2/525 useless extension candidates. Maximal degree in co-relation 2940. Up to 309 conditions per place. [2024-06-21 21:19:54,301 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 59 selfloop transitions, 53 changer transitions 0/114 dead transitions. [2024-06-21 21:19:54,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 114 transitions, 1280 flow [2024-06-21 21:19:54,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:19:54,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:19:54,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 96 transitions. [2024-06-21 21:19:54,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 21:19:54,310 INFO L175 Difference]: Start difference. First operand has 111 places, 95 transitions, 870 flow. Second operand 8 states and 96 transitions. [2024-06-21 21:19:54,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 114 transitions, 1280 flow [2024-06-21 21:19:54,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 114 transitions, 1225 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 21:19:54,337 INFO L231 Difference]: Finished difference. Result has 113 places, 101 transitions, 984 flow [2024-06-21 21:19:54,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=984, PETRI_PLACES=113, PETRI_TRANSITIONS=101} [2024-06-21 21:19:54,338 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 83 predicate places. [2024-06-21 21:19:54,338 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 101 transitions, 984 flow [2024-06-21 21:19:54,338 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 21:19:54,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:54,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:54,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 21:19:54,339 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 21:19:54,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:54,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1024667345, now seen corresponding path program 3 times [2024-06-21 21:19:54,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:54,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994876795] [2024-06-21 21:19:54,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:54,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:54,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:54,911 INFO 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 21:19:54,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:54,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994876795] [2024-06-21 21:19:54,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994876795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:54,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:54,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:19:54,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307403744] [2024-06-21 21:19:54,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:54,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:19:54,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:54,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:19:54,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:19:54,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:19:54,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 101 transitions, 984 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 21:19:54,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:54,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:19:54,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:55,105 INFO L124 PetriNetUnfolderBase]: 299/534 cut-off events. [2024-06-21 21:19:55,105 INFO L125 PetriNetUnfolderBase]: For 12187/12187 co-relation queries the response was YES. [2024-06-21 21:19:55,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3166 conditions, 534 events. 299/534 cut-off events. For 12187/12187 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2103 event pairs, 55 based on Foata normal form. 2/535 useless extension candidates. Maximal degree in co-relation 3112. Up to 315 conditions per place. [2024-06-21 21:19:55,109 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 62 selfloop transitions, 52 changer transitions 0/116 dead transitions. [2024-06-21 21:19:55,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 116 transitions, 1370 flow [2024-06-21 21:19:55,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:19:55,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:19:55,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 96 transitions. [2024-06-21 21:19:55,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 21:19:55,111 INFO L175 Difference]: Start difference. First operand has 113 places, 101 transitions, 984 flow. Second operand 8 states and 96 transitions. [2024-06-21 21:19:55,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 116 transitions, 1370 flow [2024-06-21 21:19:55,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 116 transitions, 1314 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 21:19:55,129 INFO L231 Difference]: Finished difference. Result has 118 places, 103 transitions, 1059 flow [2024-06-21 21:19:55,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1059, PETRI_PLACES=118, PETRI_TRANSITIONS=103} [2024-06-21 21:19:55,134 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 88 predicate places. [2024-06-21 21:19:55,134 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 103 transitions, 1059 flow [2024-06-21 21:19:55,135 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 21:19:55,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:55,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:55,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 21:19:55,136 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 21:19:55,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:55,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1024845285, now seen corresponding path program 3 times [2024-06-21 21:19:55,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:55,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82751303] [2024-06-21 21:19:55,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:55,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:55,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:55,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:55,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:55,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82751303] [2024-06-21 21:19:55,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82751303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:55,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:55,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:19:55,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309773307] [2024-06-21 21:19:55,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:55,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:19:55,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:55,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:19:55,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:19:55,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:19:55,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 103 transitions, 1059 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 21:19:55,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:55,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:19:55,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:55,960 INFO L124 PetriNetUnfolderBase]: 303/541 cut-off events. [2024-06-21 21:19:55,960 INFO L125 PetriNetUnfolderBase]: For 13263/13263 co-relation queries the response was YES. [2024-06-21 21:19:55,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3327 conditions, 541 events. 303/541 cut-off events. For 13263/13263 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2123 event pairs, 47 based on Foata normal form. 2/542 useless extension candidates. Maximal degree in co-relation 3271. Up to 447 conditions per place. [2024-06-21 21:19:55,967 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 83 selfloop transitions, 31 changer transitions 0/116 dead transitions. [2024-06-21 21:19:55,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 116 transitions, 1337 flow [2024-06-21 21:19:55,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:19:55,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:19:55,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2024-06-21 21:19:55,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35080645161290325 [2024-06-21 21:19:55,968 INFO L175 Difference]: Start difference. First operand has 118 places, 103 transitions, 1059 flow. Second operand 8 states and 87 transitions. [2024-06-21 21:19:55,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 116 transitions, 1337 flow [2024-06-21 21:19:55,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 116 transitions, 1249 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 21:19:55,986 INFO L231 Difference]: Finished difference. Result has 121 places, 104 transitions, 1058 flow [2024-06-21 21:19:55,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=971, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1058, PETRI_PLACES=121, PETRI_TRANSITIONS=104} [2024-06-21 21:19:55,988 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 91 predicate places. [2024-06-21 21:19:55,988 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 104 transitions, 1058 flow [2024-06-21 21:19:55,989 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 21:19:55,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:55,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:55,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 21:19:55,989 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 21:19:55,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:55,989 INFO L85 PathProgramCache]: Analyzing trace with hash -140659539, now seen corresponding path program 4 times [2024-06-21 21:19:55,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:55,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974083502] [2024-06-21 21:19:55,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:55,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:55,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:56,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:56,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:56,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974083502] [2024-06-21 21:19:56,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974083502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:56,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:56,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:19:56,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012524673] [2024-06-21 21:19:56,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:56,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:19:56,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:56,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:19:56,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:19:56,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:19:56,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 104 transitions, 1058 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 21:19:56,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:56,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:19:56,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:56,640 INFO L124 PetriNetUnfolderBase]: 304/543 cut-off events. [2024-06-21 21:19:56,641 INFO L125 PetriNetUnfolderBase]: For 13825/13825 co-relation queries the response was YES. [2024-06-21 21:19:56,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3316 conditions, 543 events. 304/543 cut-off events. For 13825/13825 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2159 event pairs, 59 based on Foata normal form. 2/544 useless extension candidates. Maximal degree in co-relation 3259. Up to 326 conditions per place. [2024-06-21 21:19:56,644 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 68 selfloop transitions, 49 changer transitions 0/119 dead transitions. [2024-06-21 21:19:56,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 119 transitions, 1456 flow [2024-06-21 21:19:56,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:19:56,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:19:56,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 94 transitions. [2024-06-21 21:19:56,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3790322580645161 [2024-06-21 21:19:56,645 INFO L175 Difference]: Start difference. First operand has 121 places, 104 transitions, 1058 flow. Second operand 8 states and 94 transitions. [2024-06-21 21:19:56,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 119 transitions, 1456 flow [2024-06-21 21:19:56,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 119 transitions, 1381 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 21:19:56,663 INFO L231 Difference]: Finished difference. Result has 123 places, 106 transitions, 1106 flow [2024-06-21 21:19:56,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=983, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1106, PETRI_PLACES=123, PETRI_TRANSITIONS=106} [2024-06-21 21:19:56,664 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 93 predicate places. [2024-06-21 21:19:56,664 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 106 transitions, 1106 flow [2024-06-21 21:19:56,664 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 21:19:56,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:56,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:56,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 21:19:56,665 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 21:19:56,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:56,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1715965619, now seen corresponding path program 4 times [2024-06-21 21:19:56,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:56,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733242669] [2024-06-21 21:19:56,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:56,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:56,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:57,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:57,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:57,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733242669] [2024-06-21 21:19:57,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733242669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:57,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:57,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:19:57,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180018899] [2024-06-21 21:19:57,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:57,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:19:57,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:57,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:19:57,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:19:57,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:19:57,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 106 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 21:19:57,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:57,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:19:57,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:57,583 INFO L124 PetriNetUnfolderBase]: 312/560 cut-off events. [2024-06-21 21:19:57,583 INFO L125 PetriNetUnfolderBase]: For 15646/15646 co-relation queries the response was YES. [2024-06-21 21:19:57,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3457 conditions, 560 events. 312/560 cut-off events. For 15646/15646 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2259 event pairs, 58 based on Foata normal form. 4/563 useless extension candidates. Maximal degree in co-relation 3399. Up to 391 conditions per place. [2024-06-21 21:19:57,586 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 79 selfloop transitions, 37 changer transitions 0/118 dead transitions. [2024-06-21 21:19:57,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 118 transitions, 1390 flow [2024-06-21 21:19:57,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:19:57,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:19:57,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 90 transitions. [2024-06-21 21:19:57,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3629032258064516 [2024-06-21 21:19:57,587 INFO L175 Difference]: Start difference. First operand has 123 places, 106 transitions, 1106 flow. Second operand 8 states and 90 transitions. [2024-06-21 21:19:57,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 118 transitions, 1390 flow [2024-06-21 21:19:57,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 118 transitions, 1330 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 21:19:57,606 INFO L231 Difference]: Finished difference. Result has 127 places, 108 transitions, 1155 flow [2024-06-21 21:19:57,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1046, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1155, PETRI_PLACES=127, PETRI_TRANSITIONS=108} [2024-06-21 21:19:57,607 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 97 predicate places. [2024-06-21 21:19:57,607 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 108 transitions, 1155 flow [2024-06-21 21:19:57,607 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 21:19:57,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:57,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:57,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 21:19:57,608 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 21:19:57,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:57,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1479308891, now seen corresponding path program 1 times [2024-06-21 21:19:57,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:57,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976283119] [2024-06-21 21:19:57,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:57,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:57,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:58,153 INFO 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 21:19:58,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:58,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976283119] [2024-06-21 21:19:58,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976283119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:58,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:58,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:19:58,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058235404] [2024-06-21 21:19:58,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:58,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:19:58,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:58,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:19:58,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:19:58,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:19:58,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 108 transitions, 1155 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 21:19:58,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:58,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:19:58,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:58,427 INFO L124 PetriNetUnfolderBase]: 315/563 cut-off events. [2024-06-21 21:19:58,427 INFO L125 PetriNetUnfolderBase]: For 15410/15410 co-relation queries the response was YES. [2024-06-21 21:19:58,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3508 conditions, 563 events. 315/563 cut-off events. For 15410/15410 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2268 event pairs, 55 based on Foata normal form. 1/563 useless extension candidates. Maximal degree in co-relation 3449. Up to 490 conditions per place. [2024-06-21 21:19:58,430 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 85 selfloop transitions, 32 changer transitions 0/119 dead transitions. [2024-06-21 21:19:58,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 119 transitions, 1481 flow [2024-06-21 21:19:58,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:19:58,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:19:58,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 103 transitions. [2024-06-21 21:19:58,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33225806451612905 [2024-06-21 21:19:58,445 INFO L175 Difference]: Start difference. First operand has 127 places, 108 transitions, 1155 flow. Second operand 10 states and 103 transitions. [2024-06-21 21:19:58,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 119 transitions, 1481 flow [2024-06-21 21:19:58,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 119 transitions, 1388 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 21:19:58,469 INFO L231 Difference]: Finished difference. Result has 131 places, 110 transitions, 1145 flow [2024-06-21 21:19:58,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1062, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1145, PETRI_PLACES=131, PETRI_TRANSITIONS=110} [2024-06-21 21:19:58,470 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 101 predicate places. [2024-06-21 21:19:58,470 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 110 transitions, 1145 flow [2024-06-21 21:19:58,470 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 21:19:58,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:58,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:58,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 21:19:58,470 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 21:19:58,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:58,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1479605561, now seen corresponding path program 2 times [2024-06-21 21:19:58,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:58,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887875094] [2024-06-21 21:19:58,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:58,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:58,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:58,971 INFO 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 21:19:58,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:58,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887875094] [2024-06-21 21:19:58,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887875094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:58,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:58,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:19:58,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269692258] [2024-06-21 21:19:58,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:58,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:19:58,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:58,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:19:58,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:19:59,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:19:59,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 110 transitions, 1145 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 21:19:59,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:59,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:19:59,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:59,252 INFO L124 PetriNetUnfolderBase]: 318/568 cut-off events. [2024-06-21 21:19:59,253 INFO L125 PetriNetUnfolderBase]: For 16043/16043 co-relation queries the response was YES. [2024-06-21 21:19:59,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3506 conditions, 568 events. 318/568 cut-off events. For 16043/16043 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2298 event pairs, 55 based on Foata normal form. 1/568 useless extension candidates. Maximal degree in co-relation 3446. Up to 494 conditions per place. [2024-06-21 21:19:59,256 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 87 selfloop transitions, 32 changer transitions 0/121 dead transitions. [2024-06-21 21:19:59,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 121 transitions, 1481 flow [2024-06-21 21:19:59,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:19:59,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:19:59,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2024-06-21 21:19:59,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34767025089605735 [2024-06-21 21:19:59,257 INFO L175 Difference]: Start difference. First operand has 131 places, 110 transitions, 1145 flow. Second operand 9 states and 97 transitions. [2024-06-21 21:19:59,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 121 transitions, 1481 flow [2024-06-21 21:19:59,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 121 transitions, 1407 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 21:19:59,280 INFO L231 Difference]: Finished difference. Result has 132 places, 112 transitions, 1158 flow [2024-06-21 21:19:59,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1075, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1158, PETRI_PLACES=132, PETRI_TRANSITIONS=112} [2024-06-21 21:19:59,280 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 102 predicate places. [2024-06-21 21:19:59,281 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 112 transitions, 1158 flow [2024-06-21 21:19:59,281 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 21:19:59,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:59,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:59,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 21:19:59,281 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 21:19:59,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:59,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1274244761, now seen corresponding path program 5 times [2024-06-21 21:19:59,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:59,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252867213] [2024-06-21 21:19:59,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:59,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:59,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:59,874 INFO 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 21:19:59,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:59,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252867213] [2024-06-21 21:19:59,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252867213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:59,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:59,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:19:59,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511953813] [2024-06-21 21:19:59,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:59,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:19:59,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:59,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:19:59,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:19:59,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:19:59,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 112 transitions, 1158 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 21:19:59,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:59,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:19:59,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:00,188 INFO L124 PetriNetUnfolderBase]: 324/580 cut-off events. [2024-06-21 21:20:00,188 INFO L125 PetriNetUnfolderBase]: For 17619/17619 co-relation queries the response was YES. [2024-06-21 21:20:00,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3576 conditions, 580 events. 324/580 cut-off events. For 17619/17619 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2373 event pairs, 52 based on Foata normal form. 2/581 useless extension candidates. Maximal degree in co-relation 3515. Up to 358 conditions per place. [2024-06-21 21:20:00,192 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 65 selfloop transitions, 62 changer transitions 0/129 dead transitions. [2024-06-21 21:20:00,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 129 transitions, 1601 flow [2024-06-21 21:20:00,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:00,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:00,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-21 21:20:00,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36451612903225805 [2024-06-21 21:20:00,193 INFO L175 Difference]: Start difference. First operand has 132 places, 112 transitions, 1158 flow. Second operand 10 states and 113 transitions. [2024-06-21 21:20:00,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 129 transitions, 1601 flow [2024-06-21 21:20:00,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 129 transitions, 1530 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 21:20:00,222 INFO L231 Difference]: Finished difference. Result has 135 places, 114 transitions, 1238 flow [2024-06-21 21:20:00,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1087, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1238, PETRI_PLACES=135, PETRI_TRANSITIONS=114} [2024-06-21 21:20:00,223 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 105 predicate places. [2024-06-21 21:20:00,223 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 114 transitions, 1238 flow [2024-06-21 21:20:00,223 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 21:20:00,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:00,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:00,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 21:20:00,224 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 21:20:00,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:00,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1487886529, now seen corresponding path program 6 times [2024-06-21 21:20:00,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:00,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361780806] [2024-06-21 21:20:00,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:00,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:00,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:00,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:00,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:00,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361780806] [2024-06-21 21:20:00,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361780806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:00,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:00,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:20:00,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109355886] [2024-06-21 21:20:00,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:00,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:20:00,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:00,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:20:00,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:20:00,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:00,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 114 transitions, 1238 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 21:20:00,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:00,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:00,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:00,879 INFO L124 PetriNetUnfolderBase]: 330/590 cut-off events. [2024-06-21 21:20:00,879 INFO L125 PetriNetUnfolderBase]: For 18946/18946 co-relation queries the response was YES. [2024-06-21 21:20:00,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3745 conditions, 590 events. 330/590 cut-off events. For 18946/18946 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2423 event pairs, 62 based on Foata normal form. 2/591 useless extension candidates. Maximal degree in co-relation 3683. Up to 364 conditions per place. [2024-06-21 21:20:00,883 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 75 selfloop transitions, 51 changer transitions 0/128 dead transitions. [2024-06-21 21:20:00,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 128 transitions, 1676 flow [2024-06-21 21:20:00,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:20:00,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:20:00,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 95 transitions. [2024-06-21 21:20:00,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38306451612903225 [2024-06-21 21:20:00,886 INFO L175 Difference]: Start difference. First operand has 135 places, 114 transitions, 1238 flow. Second operand 8 states and 95 transitions. [2024-06-21 21:20:00,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 128 transitions, 1676 flow [2024-06-21 21:20:00,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 128 transitions, 1535 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 21:20:00,915 INFO L231 Difference]: Finished difference. Result has 135 places, 116 transitions, 1230 flow [2024-06-21 21:20:00,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1101, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1230, PETRI_PLACES=135, PETRI_TRANSITIONS=116} [2024-06-21 21:20:00,915 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 105 predicate places. [2024-06-21 21:20:00,916 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 116 transitions, 1230 flow [2024-06-21 21:20:00,916 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 21:20:00,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:00,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:00,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 21:20:00,916 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 21:20:00,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:00,917 INFO L85 PathProgramCache]: Analyzing trace with hash 108205065, now seen corresponding path program 3 times [2024-06-21 21:20:00,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:00,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456947667] [2024-06-21 21:20:00,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:00,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:00,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:01,296 INFO 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 21:20:01,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:01,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456947667] [2024-06-21 21:20:01,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456947667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:01,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:01,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:20:01,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739997815] [2024-06-21 21:20:01,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:01,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:20:01,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:01,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:20:01,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:20:01,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:01,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 116 transitions, 1230 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 21:20:01,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:01,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:01,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:01,492 INFO L124 PetriNetUnfolderBase]: 328/585 cut-off events. [2024-06-21 21:20:01,492 INFO L125 PetriNetUnfolderBase]: For 18786/18786 co-relation queries the response was YES. [2024-06-21 21:20:01,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3687 conditions, 585 events. 328/585 cut-off events. For 18786/18786 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2395 event pairs, 57 based on Foata normal form. 1/585 useless extension candidates. Maximal degree in co-relation 3624. Up to 512 conditions per place. [2024-06-21 21:20:01,497 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 91 selfloop transitions, 30 changer transitions 0/123 dead transitions. [2024-06-21 21:20:01,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 123 transitions, 1488 flow [2024-06-21 21:20:01,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:20:01,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:20:01,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2024-06-21 21:20:01,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35080645161290325 [2024-06-21 21:20:01,498 INFO L175 Difference]: Start difference. First operand has 135 places, 116 transitions, 1230 flow. Second operand 8 states and 87 transitions. [2024-06-21 21:20:01,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 123 transitions, 1488 flow [2024-06-21 21:20:01,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 123 transitions, 1359 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 21:20:01,526 INFO L231 Difference]: Finished difference. Result has 137 places, 116 transitions, 1166 flow [2024-06-21 21:20:01,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1101, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1166, PETRI_PLACES=137, PETRI_TRANSITIONS=116} [2024-06-21 21:20:01,526 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 107 predicate places. [2024-06-21 21:20:01,527 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 116 transitions, 1166 flow [2024-06-21 21:20:01,527 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 21:20:01,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:01,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:01,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 21:20:01,527 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 21:20:01,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:01,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1265970551, now seen corresponding path program 7 times [2024-06-21 21:20:01,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:01,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658414696] [2024-06-21 21:20:01,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:01,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:01,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:01,924 INFO 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 21:20:01,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:01,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658414696] [2024-06-21 21:20:01,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658414696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:01,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:01,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:20:01,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466847117] [2024-06-21 21:20:01,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:01,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:20:01,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:01,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:20:01,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:20:01,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:01,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 116 transitions, 1166 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 21:20:01,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:01,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:01,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:02,125 INFO L124 PetriNetUnfolderBase]: 324/581 cut-off events. [2024-06-21 21:20:02,126 INFO L125 PetriNetUnfolderBase]: For 18948/18948 co-relation queries the response was YES. [2024-06-21 21:20:02,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3544 conditions, 581 events. 324/581 cut-off events. For 18948/18948 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2387 event pairs, 61 based on Foata normal form. 2/582 useless extension candidates. Maximal degree in co-relation 3480. Up to 358 conditions per place. [2024-06-21 21:20:02,132 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 76 selfloop transitions, 50 changer transitions 0/128 dead transitions. [2024-06-21 21:20:02,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 128 transitions, 1520 flow [2024-06-21 21:20:02,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:20:02,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:20:02,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 95 transitions. [2024-06-21 21:20:02,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38306451612903225 [2024-06-21 21:20:02,133 INFO L175 Difference]: Start difference. First operand has 137 places, 116 transitions, 1166 flow. Second operand 8 states and 95 transitions. [2024-06-21 21:20:02,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 128 transitions, 1520 flow [2024-06-21 21:20:02,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 128 transitions, 1437 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 21:20:02,166 INFO L231 Difference]: Finished difference. Result has 138 places, 116 transitions, 1188 flow [2024-06-21 21:20:02,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1083, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1188, PETRI_PLACES=138, PETRI_TRANSITIONS=116} [2024-06-21 21:20:02,167 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 108 predicate places. [2024-06-21 21:20:02,167 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 116 transitions, 1188 flow [2024-06-21 21:20:02,167 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 21:20:02,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:02,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:02,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 21:20:02,167 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 21:20:02,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:02,167 INFO L85 PathProgramCache]: Analyzing trace with hash -2114615947, now seen corresponding path program 5 times [2024-06-21 21:20:02,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:02,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25825315] [2024-06-21 21:20:02,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:02,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:02,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:02,759 INFO 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 21:20:02,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:02,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25825315] [2024-06-21 21:20:02,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25825315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:02,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:02,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:02,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342197155] [2024-06-21 21:20:02,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:02,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:02,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:02,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:02,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:02,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:02,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 116 transitions, 1188 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 21:20:02,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:02,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:02,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:03,051 INFO L124 PetriNetUnfolderBase]: 345/617 cut-off events. [2024-06-21 21:20:03,052 INFO L125 PetriNetUnfolderBase]: For 20341/20341 co-relation queries the response was YES. [2024-06-21 21:20:03,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3862 conditions, 617 events. 345/617 cut-off events. For 20341/20341 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2582 event pairs, 52 based on Foata normal form. 2/618 useless extension candidates. Maximal degree in co-relation 3797. Up to 543 conditions per place. [2024-06-21 21:20:03,056 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 112 selfloop transitions, 26 changer transitions 0/140 dead transitions. [2024-06-21 21:20:03,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 140 transitions, 1636 flow [2024-06-21 21:20:03,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:03,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:03,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2024-06-21 21:20:03,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34767025089605735 [2024-06-21 21:20:03,057 INFO L175 Difference]: Start difference. First operand has 138 places, 116 transitions, 1188 flow. Second operand 9 states and 97 transitions. [2024-06-21 21:20:03,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 140 transitions, 1636 flow [2024-06-21 21:20:03,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 140 transitions, 1480 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 21:20:03,088 INFO L231 Difference]: Finished difference. Result has 140 places, 124 transitions, 1232 flow [2024-06-21 21:20:03,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1048, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1232, PETRI_PLACES=140, PETRI_TRANSITIONS=124} [2024-06-21 21:20:03,088 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 110 predicate places. [2024-06-21 21:20:03,088 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 124 transitions, 1232 flow [2024-06-21 21:20:03,089 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 21:20:03,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:03,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:03,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 21:20:03,089 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 21:20:03,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:03,089 INFO L85 PathProgramCache]: Analyzing trace with hash 312649003, now seen corresponding path program 6 times [2024-06-21 21:20:03,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:03,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300819551] [2024-06-21 21:20:03,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:03,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:03,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:03,608 INFO 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 21:20:03,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:03,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300819551] [2024-06-21 21:20:03,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300819551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:03,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:03,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:03,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074880001] [2024-06-21 21:20:03,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:03,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:03,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:03,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:03,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:03,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:03,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 124 transitions, 1232 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 21:20:03,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:03,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:03,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:03,886 INFO L124 PetriNetUnfolderBase]: 342/612 cut-off events. [2024-06-21 21:20:03,886 INFO L125 PetriNetUnfolderBase]: For 19915/19915 co-relation queries the response was YES. [2024-06-21 21:20:03,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3715 conditions, 612 events. 342/612 cut-off events. For 19915/19915 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2551 event pairs, 51 based on Foata normal form. 2/613 useless extension candidates. Maximal degree in co-relation 3648. Up to 538 conditions per place. [2024-06-21 21:20:03,890 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 113 selfloop transitions, 25 changer transitions 0/140 dead transitions. [2024-06-21 21:20:03,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 140 transitions, 1556 flow [2024-06-21 21:20:03,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:03,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:03,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 98 transitions. [2024-06-21 21:20:03,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35125448028673834 [2024-06-21 21:20:03,893 INFO L175 Difference]: Start difference. First operand has 140 places, 124 transitions, 1232 flow. Second operand 9 states and 98 transitions. [2024-06-21 21:20:03,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 140 transitions, 1556 flow [2024-06-21 21:20:03,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 140 transitions, 1489 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 21:20:03,927 INFO L231 Difference]: Finished difference. Result has 143 places, 124 transitions, 1220 flow [2024-06-21 21:20:03,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1165, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1220, PETRI_PLACES=143, PETRI_TRANSITIONS=124} [2024-06-21 21:20:03,928 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 113 predicate places. [2024-06-21 21:20:03,928 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 124 transitions, 1220 flow [2024-06-21 21:20:03,928 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 21:20:03,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:03,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:03,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 21:20:03,928 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 21:20:03,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:03,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1274552591, now seen corresponding path program 1 times [2024-06-21 21:20:03,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:03,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105176050] [2024-06-21 21:20:03,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:03,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:03,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:04,588 INFO 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 21:20:04,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:04,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105176050] [2024-06-21 21:20:04,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105176050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:04,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:04,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:04,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104783389] [2024-06-21 21:20:04,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:04,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:04,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:04,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:04,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:04,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:04,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 124 transitions, 1220 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:04,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:04,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:04,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:04,893 INFO L124 PetriNetUnfolderBase]: 380/695 cut-off events. [2024-06-21 21:20:04,894 INFO L125 PetriNetUnfolderBase]: For 30550/30550 co-relation queries the response was YES. [2024-06-21 21:20:04,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3980 conditions, 695 events. 380/695 cut-off events. For 30550/30550 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3021 event pairs, 60 based on Foata normal form. 16/710 useless extension candidates. Maximal degree in co-relation 3913. Up to 295 conditions per place. [2024-06-21 21:20:04,898 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 73 selfloop transitions, 78 changer transitions 0/153 dead transitions. [2024-06-21 21:20:04,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 153 transitions, 1882 flow [2024-06-21 21:20:04,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:04,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:04,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-21 21:20:04,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 21:20:04,899 INFO L175 Difference]: Start difference. First operand has 143 places, 124 transitions, 1220 flow. Second operand 10 states and 124 transitions. [2024-06-21 21:20:04,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 153 transitions, 1882 flow [2024-06-21 21:20:04,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 153 transitions, 1735 flow, removed 15 selfloop flow, removed 11 redundant places. [2024-06-21 21:20:04,934 INFO L231 Difference]: Finished difference. Result has 143 places, 132 transitions, 1335 flow [2024-06-21 21:20:04,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1073, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1335, PETRI_PLACES=143, PETRI_TRANSITIONS=132} [2024-06-21 21:20:04,934 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 113 predicate places. [2024-06-21 21:20:04,934 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 132 transitions, 1335 flow [2024-06-21 21:20:04,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:04,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:04,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:04,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 21:20:04,934 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 21:20:04,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:04,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1854626821, now seen corresponding path program 1 times [2024-06-21 21:20:04,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:04,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469147120] [2024-06-21 21:20:04,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:04,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:04,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:05,653 INFO 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 21:20:05,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:05,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469147120] [2024-06-21 21:20:05,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469147120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:05,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:05,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:05,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230968601] [2024-06-21 21:20:05,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:05,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:05,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:05,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:05,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:05,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:05,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 132 transitions, 1335 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 21:20:05,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:05,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:05,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:05,898 INFO L124 PetriNetUnfolderBase]: 384/703 cut-off events. [2024-06-21 21:20:05,898 INFO L125 PetriNetUnfolderBase]: For 22819/22819 co-relation queries the response was YES. [2024-06-21 21:20:05,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4150 conditions, 703 events. 384/703 cut-off events. For 22819/22819 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3099 event pairs, 53 based on Foata normal form. 2/704 useless extension candidates. Maximal degree in co-relation 4084. Up to 605 conditions per place. [2024-06-21 21:20:05,903 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 122 selfloop transitions, 21 changer transitions 0/145 dead transitions. [2024-06-21 21:20:05,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 145 transitions, 1657 flow [2024-06-21 21:20:05,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:20:05,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:20:05,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 83 transitions. [2024-06-21 21:20:05,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3346774193548387 [2024-06-21 21:20:05,913 INFO L175 Difference]: Start difference. First operand has 143 places, 132 transitions, 1335 flow. Second operand 8 states and 83 transitions. [2024-06-21 21:20:05,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 145 transitions, 1657 flow [2024-06-21 21:20:05,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 145 transitions, 1531 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 21:20:05,952 INFO L231 Difference]: Finished difference. Result has 146 places, 133 transitions, 1265 flow [2024-06-21 21:20:05,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1209, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1265, PETRI_PLACES=146, PETRI_TRANSITIONS=133} [2024-06-21 21:20:05,953 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 116 predicate places. [2024-06-21 21:20:05,953 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 133 transitions, 1265 flow [2024-06-21 21:20:05,953 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 21:20:05,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:05,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:05,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 21:20:05,954 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 21:20:05,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:05,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1847534607, now seen corresponding path program 2 times [2024-06-21 21:20:05,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:05,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108059940] [2024-06-21 21:20:05,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:05,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:05,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:06,679 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 21:20:06,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:06,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108059940] [2024-06-21 21:20:06,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108059940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:06,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:06,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:06,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056089998] [2024-06-21 21:20:06,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:06,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:06,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:06,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:06,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:06,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:06,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 133 transitions, 1265 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 21:20:06,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:06,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:06,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:06,952 INFO L124 PetriNetUnfolderBase]: 395/724 cut-off events. [2024-06-21 21:20:06,952 INFO L125 PetriNetUnfolderBase]: For 25147/25147 co-relation queries the response was YES. [2024-06-21 21:20:06,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4190 conditions, 724 events. 395/724 cut-off events. For 25147/25147 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3246 event pairs, 64 based on Foata normal form. 2/725 useless extension candidates. Maximal degree in co-relation 4123. Up to 565 conditions per place. [2024-06-21 21:20:06,958 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 113 selfloop transitions, 33 changer transitions 0/148 dead transitions. [2024-06-21 21:20:06,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 148 transitions, 1689 flow [2024-06-21 21:20:06,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:20:06,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:20:06,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 88 transitions. [2024-06-21 21:20:06,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 21:20:06,971 INFO L175 Difference]: Start difference. First operand has 146 places, 133 transitions, 1265 flow. Second operand 8 states and 88 transitions. [2024-06-21 21:20:06,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 148 transitions, 1689 flow [2024-06-21 21:20:07,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 148 transitions, 1643 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 21:20:07,014 INFO L231 Difference]: Finished difference. Result has 148 places, 135 transitions, 1313 flow [2024-06-21 21:20:07,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1219, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1313, PETRI_PLACES=148, PETRI_TRANSITIONS=135} [2024-06-21 21:20:07,014 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 118 predicate places. [2024-06-21 21:20:07,015 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 135 transitions, 1313 flow [2024-06-21 21:20:07,015 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 21:20:07,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:07,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:07,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 21:20:07,015 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 21:20:07,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:07,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1852748996, now seen corresponding path program 1 times [2024-06-21 21:20:07,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:07,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101413401] [2024-06-21 21:20:07,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:07,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:07,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:07,630 INFO 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 21:20:07,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:07,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101413401] [2024-06-21 21:20:07,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101413401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:07,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:07,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:07,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43393281] [2024-06-21 21:20:07,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:07,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:07,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:07,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:07,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:07,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:07,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 135 transitions, 1313 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 21:20:07,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:07,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:07,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:07,901 INFO L124 PetriNetUnfolderBase]: 393/721 cut-off events. [2024-06-21 21:20:07,902 INFO L125 PetriNetUnfolderBase]: For 24885/24885 co-relation queries the response was YES. [2024-06-21 21:20:07,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4197 conditions, 721 events. 393/721 cut-off events. For 24885/24885 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3230 event pairs, 64 based on Foata normal form. 1/721 useless extension candidates. Maximal degree in co-relation 4129. Up to 602 conditions per place. [2024-06-21 21:20:07,908 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 107 selfloop transitions, 38 changer transitions 0/147 dead transitions. [2024-06-21 21:20:07,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 147 transitions, 1637 flow [2024-06-21 21:20:07,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:20:07,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:20:07,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2024-06-21 21:20:07,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35080645161290325 [2024-06-21 21:20:07,909 INFO L175 Difference]: Start difference. First operand has 148 places, 135 transitions, 1313 flow. Second operand 8 states and 87 transitions. [2024-06-21 21:20:07,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 147 transitions, 1637 flow [2024-06-21 21:20:07,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 147 transitions, 1583 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 21:20:07,955 INFO L231 Difference]: Finished difference. Result has 152 places, 135 transitions, 1343 flow [2024-06-21 21:20:07,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1259, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1343, PETRI_PLACES=152, PETRI_TRANSITIONS=135} [2024-06-21 21:20:07,960 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 122 predicate places. [2024-06-21 21:20:07,960 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 135 transitions, 1343 flow [2024-06-21 21:20:07,961 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 21:20:07,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:07,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:07,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 21:20:07,961 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 21:20:07,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:07,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1852749151, now seen corresponding path program 3 times [2024-06-21 21:20:07,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:07,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324533391] [2024-06-21 21:20:07,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:07,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:08,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:08,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:08,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:08,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324533391] [2024-06-21 21:20:08,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324533391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:08,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:08,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:08,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889040524] [2024-06-21 21:20:08,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:08,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:08,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:08,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:08,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:08,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:08,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 135 transitions, 1343 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 21:20:08,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:08,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:08,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:08,968 INFO L124 PetriNetUnfolderBase]: 390/716 cut-off events. [2024-06-21 21:20:08,969 INFO L125 PetriNetUnfolderBase]: For 25045/25045 co-relation queries the response was YES. [2024-06-21 21:20:08,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4171 conditions, 716 events. 390/716 cut-off events. For 25045/25045 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3197 event pairs, 63 based on Foata normal form. 2/717 useless extension candidates. Maximal degree in co-relation 4101. Up to 600 conditions per place. [2024-06-21 21:20:08,973 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 110 selfloop transitions, 35 changer transitions 0/147 dead transitions. [2024-06-21 21:20:08,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 147 transitions, 1665 flow [2024-06-21 21:20:08,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:20:08,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:20:08,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 86 transitions. [2024-06-21 21:20:08,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3467741935483871 [2024-06-21 21:20:08,974 INFO L175 Difference]: Start difference. First operand has 152 places, 135 transitions, 1343 flow. Second operand 8 states and 86 transitions. [2024-06-21 21:20:08,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 147 transitions, 1665 flow [2024-06-21 21:20:09,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 147 transitions, 1515 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 21:20:09,018 INFO L231 Difference]: Finished difference. Result has 151 places, 135 transitions, 1268 flow [2024-06-21 21:20:09,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1193, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1268, PETRI_PLACES=151, PETRI_TRANSITIONS=135} [2024-06-21 21:20:09,018 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 121 predicate places. [2024-06-21 21:20:09,018 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 135 transitions, 1268 flow [2024-06-21 21:20:09,019 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 21:20:09,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:09,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:09,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 21:20:09,019 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 21:20:09,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:09,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1765907239, now seen corresponding path program 1 times [2024-06-21 21:20:09,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:09,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988855241] [2024-06-21 21:20:09,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:09,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:09,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:09,479 INFO 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 21:20:09,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:09,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988855241] [2024-06-21 21:20:09,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988855241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:09,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:09,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:09,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144572621] [2024-06-21 21:20:09,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:09,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:09,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:09,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:09,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:09,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:09,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 135 transitions, 1268 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 21:20:09,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:09,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:09,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:09,708 INFO L124 PetriNetUnfolderBase]: 396/726 cut-off events. [2024-06-21 21:20:09,709 INFO L125 PetriNetUnfolderBase]: For 25982/25982 co-relation queries the response was YES. [2024-06-21 21:20:09,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4155 conditions, 726 events. 396/726 cut-off events. For 25982/25982 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3269 event pairs, 64 based on Foata normal form. 2/727 useless extension candidates. Maximal degree in co-relation 4084. Up to 618 conditions per place. [2024-06-21 21:20:09,713 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 119 selfloop transitions, 30 changer transitions 1/152 dead transitions. [2024-06-21 21:20:09,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 152 transitions, 1634 flow [2024-06-21 21:20:09,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:09,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:09,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-06-21 21:20:09,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34408602150537637 [2024-06-21 21:20:09,716 INFO L175 Difference]: Start difference. First operand has 151 places, 135 transitions, 1268 flow. Second operand 9 states and 96 transitions. [2024-06-21 21:20:09,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 152 transitions, 1634 flow [2024-06-21 21:20:09,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 152 transitions, 1555 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 21:20:09,762 INFO L231 Difference]: Finished difference. Result has 153 places, 136 transitions, 1267 flow [2024-06-21 21:20:09,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1267, PETRI_PLACES=153, PETRI_TRANSITIONS=136} [2024-06-21 21:20:09,767 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 123 predicate places. [2024-06-21 21:20:09,767 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 136 transitions, 1267 flow [2024-06-21 21:20:09,768 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 21:20:09,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:09,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:09,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 21:20:09,768 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 21:20:09,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:09,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1699706085, now seen corresponding path program 2 times [2024-06-21 21:20:09,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:09,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142293046] [2024-06-21 21:20:09,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:09,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:09,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:10,237 INFO 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 21:20:10,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:10,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142293046] [2024-06-21 21:20:10,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142293046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:10,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:10,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:10,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381432818] [2024-06-21 21:20:10,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:10,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:10,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:10,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:10,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:10,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:10,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 136 transitions, 1267 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 21:20:10,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:10,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:10,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:10,529 INFO L124 PetriNetUnfolderBase]: 404/742 cut-off events. [2024-06-21 21:20:10,530 INFO L125 PetriNetUnfolderBase]: For 29300/29300 co-relation queries the response was YES. [2024-06-21 21:20:10,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4249 conditions, 742 events. 404/742 cut-off events. For 29300/29300 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3350 event pairs, 69 based on Foata normal form. 4/745 useless extension candidates. Maximal degree in co-relation 4177. Up to 370 conditions per place. [2024-06-21 21:20:10,533 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 78 selfloop transitions, 77 changer transitions 1/158 dead transitions. [2024-06-21 21:20:10,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 158 transitions, 1872 flow [2024-06-21 21:20:10,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:10,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:10,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-06-21 21:20:10,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-06-21 21:20:10,535 INFO L175 Difference]: Start difference. First operand has 153 places, 136 transitions, 1267 flow. Second operand 9 states and 111 transitions. [2024-06-21 21:20:10,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 158 transitions, 1872 flow [2024-06-21 21:20:10,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 158 transitions, 1808 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 21:20:10,581 INFO L231 Difference]: Finished difference. Result has 155 places, 141 transitions, 1422 flow [2024-06-21 21:20:10,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1203, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1422, PETRI_PLACES=155, PETRI_TRANSITIONS=141} [2024-06-21 21:20:10,581 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 125 predicate places. [2024-06-21 21:20:10,581 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 141 transitions, 1422 flow [2024-06-21 21:20:10,581 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 21:20:10,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:10,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:10,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 21:20:10,582 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 21:20:10,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:10,582 INFO L85 PathProgramCache]: Analyzing trace with hash -400299313, now seen corresponding path program 3 times [2024-06-21 21:20:10,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:10,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350616727] [2024-06-21 21:20:10,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:10,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:10,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:11,047 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 21:20:11,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:11,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350616727] [2024-06-21 21:20:11,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350616727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:11,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:11,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:11,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386089575] [2024-06-21 21:20:11,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:11,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:11,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:11,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:11,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:11,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:11,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 141 transitions, 1422 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 21:20:11,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:11,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:11,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:11,330 INFO L124 PetriNetUnfolderBase]: 406/748 cut-off events. [2024-06-21 21:20:11,330 INFO L125 PetriNetUnfolderBase]: For 28819/28819 co-relation queries the response was YES. [2024-06-21 21:20:11,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4459 conditions, 748 events. 406/748 cut-off events. For 28819/28819 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3410 event pairs, 71 based on Foata normal form. 2/749 useless extension candidates. Maximal degree in co-relation 4386. Up to 372 conditions per place. [2024-06-21 21:20:11,335 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 82 selfloop transitions, 74 changer transitions 1/159 dead transitions. [2024-06-21 21:20:11,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 159 transitions, 1997 flow [2024-06-21 21:20:11,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:11,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:11,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 110 transitions. [2024-06-21 21:20:11,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3942652329749104 [2024-06-21 21:20:11,336 INFO L175 Difference]: Start difference. First operand has 155 places, 141 transitions, 1422 flow. Second operand 9 states and 110 transitions. [2024-06-21 21:20:11,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 159 transitions, 1997 flow [2024-06-21 21:20:11,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 159 transitions, 1919 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 21:20:11,384 INFO L231 Difference]: Finished difference. Result has 160 places, 142 transitions, 1512 flow [2024-06-21 21:20:11,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1344, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1512, PETRI_PLACES=160, PETRI_TRANSITIONS=142} [2024-06-21 21:20:11,385 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 130 predicate places. [2024-06-21 21:20:11,385 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 142 transitions, 1512 flow [2024-06-21 21:20:11,385 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 21:20:11,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:11,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:11,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 21:20:11,386 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 21:20:11,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:11,386 INFO L85 PathProgramCache]: Analyzing trace with hash -400507075, now seen corresponding path program 4 times [2024-06-21 21:20:11,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:11,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929140294] [2024-06-21 21:20:11,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:11,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:11,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:12,163 INFO 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 21:20:12,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:12,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929140294] [2024-06-21 21:20:12,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929140294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:12,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:12,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:12,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15024198] [2024-06-21 21:20:12,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:12,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:12,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:12,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:12,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:12,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:12,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 142 transitions, 1512 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 21:20:12,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:12,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:12,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:12,407 INFO L124 PetriNetUnfolderBase]: 406/752 cut-off events. [2024-06-21 21:20:12,407 INFO L125 PetriNetUnfolderBase]: For 30360/30360 co-relation queries the response was YES. [2024-06-21 21:20:12,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4614 conditions, 752 events. 406/752 cut-off events. For 30360/30360 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3464 event pairs, 63 based on Foata normal form. 2/753 useless extension candidates. Maximal degree in co-relation 4539. Up to 567 conditions per place. [2024-06-21 21:20:12,412 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 99 selfloop transitions, 54 changer transitions 0/155 dead transitions. [2024-06-21 21:20:12,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 155 transitions, 1865 flow [2024-06-21 21:20:12,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:12,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:12,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 99 transitions. [2024-06-21 21:20:12,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 21:20:12,413 INFO L175 Difference]: Start difference. First operand has 160 places, 142 transitions, 1512 flow. Second operand 9 states and 99 transitions. [2024-06-21 21:20:12,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 155 transitions, 1865 flow [2024-06-21 21:20:12,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 155 transitions, 1731 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 21:20:12,490 INFO L231 Difference]: Finished difference. Result has 163 places, 143 transitions, 1504 flow [2024-06-21 21:20:12,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1378, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1504, PETRI_PLACES=163, PETRI_TRANSITIONS=143} [2024-06-21 21:20:12,490 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 133 predicate places. [2024-06-21 21:20:12,491 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 143 transitions, 1504 flow [2024-06-21 21:20:12,491 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 21:20:12,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:12,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:12,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 21:20:12,491 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 21:20:12,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:12,492 INFO L85 PathProgramCache]: Analyzing trace with hash -400501123, now seen corresponding path program 4 times [2024-06-21 21:20:12,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:12,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455986855] [2024-06-21 21:20:12,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:12,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:12,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:12,959 INFO 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 21:20:12,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:12,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455986855] [2024-06-21 21:20:12,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455986855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:12,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:12,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:12,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647881521] [2024-06-21 21:20:12,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:12,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:12,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:12,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:12,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:13,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:13,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 143 transitions, 1504 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 21:20:13,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:13,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:13,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:13,265 INFO L124 PetriNetUnfolderBase]: 412/762 cut-off events. [2024-06-21 21:20:13,265 INFO L125 PetriNetUnfolderBase]: For 31538/31538 co-relation queries the response was YES. [2024-06-21 21:20:13,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4659 conditions, 762 events. 412/762 cut-off events. For 31538/31538 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3516 event pairs, 69 based on Foata normal form. 2/763 useless extension candidates. Maximal degree in co-relation 4583. Up to 382 conditions per place. [2024-06-21 21:20:13,270 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 86 selfloop transitions, 72 changer transitions 1/161 dead transitions. [2024-06-21 21:20:13,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 161 transitions, 2094 flow [2024-06-21 21:20:13,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:13,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:13,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 110 transitions. [2024-06-21 21:20:13,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3942652329749104 [2024-06-21 21:20:13,272 INFO L175 Difference]: Start difference. First operand has 163 places, 143 transitions, 1504 flow. Second operand 9 states and 110 transitions. [2024-06-21 21:20:13,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 161 transitions, 2094 flow [2024-06-21 21:20:13,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 161 transitions, 1978 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 21:20:13,347 INFO L231 Difference]: Finished difference. Result has 165 places, 144 transitions, 1553 flow [2024-06-21 21:20:13,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1388, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1553, PETRI_PLACES=165, PETRI_TRANSITIONS=144} [2024-06-21 21:20:13,348 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 135 predicate places. [2024-06-21 21:20:13,348 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 144 transitions, 1553 flow [2024-06-21 21:20:13,348 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 21:20:13,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:13,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:13,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 21:20:13,348 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 21:20:13,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:13,349 INFO L85 PathProgramCache]: Analyzing trace with hash -406013605, now seen corresponding path program 5 times [2024-06-21 21:20:13,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:13,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449048598] [2024-06-21 21:20:13,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:13,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:13,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:14,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:14,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:14,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449048598] [2024-06-21 21:20:14,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449048598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:14,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:14,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:14,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463926837] [2024-06-21 21:20:14,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:14,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:14,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:14,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:14,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:14,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:14,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 144 transitions, 1553 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 21:20:14,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:14,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:14,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:14,343 INFO L124 PetriNetUnfolderBase]: 412/766 cut-off events. [2024-06-21 21:20:14,343 INFO L125 PetriNetUnfolderBase]: For 32849/32849 co-relation queries the response was YES. [2024-06-21 21:20:14,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4736 conditions, 766 events. 412/766 cut-off events. For 32849/32849 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3574 event pairs, 71 based on Foata normal form. 2/767 useless extension candidates. Maximal degree in co-relation 4659. Up to 581 conditions per place. [2024-06-21 21:20:14,348 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 111 selfloop transitions, 43 changer transitions 0/156 dead transitions. [2024-06-21 21:20:14,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 156 transitions, 1905 flow [2024-06-21 21:20:14,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:20:14,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:20:14,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2024-06-21 21:20:14,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3588709677419355 [2024-06-21 21:20:14,350 INFO L175 Difference]: Start difference. First operand has 165 places, 144 transitions, 1553 flow. Second operand 8 states and 89 transitions. [2024-06-21 21:20:14,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 156 transitions, 1905 flow [2024-06-21 21:20:14,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 156 transitions, 1787 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 21:20:14,415 INFO L231 Difference]: Finished difference. Result has 167 places, 145 transitions, 1541 flow [2024-06-21 21:20:14,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1435, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1541, PETRI_PLACES=167, PETRI_TRANSITIONS=145} [2024-06-21 21:20:14,415 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 137 predicate places. [2024-06-21 21:20:14,415 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 145 transitions, 1541 flow [2024-06-21 21:20:14,416 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 21:20:14,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:14,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:14,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 21:20:14,416 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 21:20:14,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:14,416 INFO L85 PathProgramCache]: Analyzing trace with hash -405863503, now seen corresponding path program 5 times [2024-06-21 21:20:14,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:14,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442576565] [2024-06-21 21:20:14,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:14,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:14,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:14,874 INFO 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 21:20:14,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:14,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442576565] [2024-06-21 21:20:14,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442576565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:14,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:14,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:14,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683177749] [2024-06-21 21:20:14,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:14,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:14,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:14,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:14,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:14,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:14,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 145 transitions, 1541 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 21:20:14,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:14,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:14,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:15,101 INFO L124 PetriNetUnfolderBase]: 421/779 cut-off events. [2024-06-21 21:20:15,101 INFO L125 PetriNetUnfolderBase]: For 35371/35371 co-relation queries the response was YES. [2024-06-21 21:20:15,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4860 conditions, 779 events. 421/779 cut-off events. For 35371/35371 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3634 event pairs, 75 based on Foata normal form. 2/780 useless extension candidates. Maximal degree in co-relation 4782. Up to 397 conditions per place. [2024-06-21 21:20:15,106 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 91 selfloop transitions, 71 changer transitions 1/165 dead transitions. [2024-06-21 21:20:15,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 165 transitions, 2174 flow [2024-06-21 21:20:15,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:15,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:15,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 107 transitions. [2024-06-21 21:20:15,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835125448028674 [2024-06-21 21:20:15,107 INFO L175 Difference]: Start difference. First operand has 167 places, 145 transitions, 1541 flow. Second operand 9 states and 107 transitions. [2024-06-21 21:20:15,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 165 transitions, 2174 flow [2024-06-21 21:20:15,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 165 transitions, 2078 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 21:20:15,194 INFO L231 Difference]: Finished difference. Result has 171 places, 149 transitions, 1689 flow [2024-06-21 21:20:15,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1445, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1689, PETRI_PLACES=171, PETRI_TRANSITIONS=149} [2024-06-21 21:20:15,195 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 141 predicate places. [2024-06-21 21:20:15,196 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 149 transitions, 1689 flow [2024-06-21 21:20:15,196 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 21:20:15,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:15,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:15,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 21:20:15,196 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 21:20:15,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:15,197 INFO L85 PathProgramCache]: Analyzing trace with hash -406017325, now seen corresponding path program 6 times [2024-06-21 21:20:15,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:15,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255638616] [2024-06-21 21:20:15,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:15,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:15,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:15,825 INFO 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 21:20:15,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:15,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255638616] [2024-06-21 21:20:15,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255638616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:15,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:15,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:15,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256629297] [2024-06-21 21:20:15,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:15,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:15,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:15,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:15,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:15,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:15,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 149 transitions, 1689 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 21:20:15,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:15,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:15,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:16,088 INFO L124 PetriNetUnfolderBase]: 407/757 cut-off events. [2024-06-21 21:20:16,089 INFO L125 PetriNetUnfolderBase]: For 34501/34501 co-relation queries the response was YES. [2024-06-21 21:20:16,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4831 conditions, 757 events. 407/757 cut-off events. For 34501/34501 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3511 event pairs, 75 based on Foata normal form. 2/758 useless extension candidates. Maximal degree in co-relation 4751. Up to 534 conditions per place. [2024-06-21 21:20:16,094 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 113 selfloop transitions, 45 changer transitions 0/160 dead transitions. [2024-06-21 21:20:16,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 160 transitions, 2033 flow [2024-06-21 21:20:16,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:20:16,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:20:16,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2024-06-21 21:20:16,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3588709677419355 [2024-06-21 21:20:16,095 INFO L175 Difference]: Start difference. First operand has 171 places, 149 transitions, 1689 flow. Second operand 8 states and 89 transitions. [2024-06-21 21:20:16,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 160 transitions, 2033 flow [2024-06-21 21:20:16,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 160 transitions, 1957 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 21:20:16,188 INFO L231 Difference]: Finished difference. Result has 174 places, 149 transitions, 1708 flow [2024-06-21 21:20:16,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1613, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1708, PETRI_PLACES=174, PETRI_TRANSITIONS=149} [2024-06-21 21:20:16,189 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 144 predicate places. [2024-06-21 21:20:16,189 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 149 transitions, 1708 flow [2024-06-21 21:20:16,189 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 21:20:16,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:16,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:16,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 21:20:16,189 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 21:20:16,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:16,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1386392384, now seen corresponding path program 1 times [2024-06-21 21:20:16,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:16,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785926130] [2024-06-21 21:20:16,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:16,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:16,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:16,898 INFO 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 21:20:16,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:16,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785926130] [2024-06-21 21:20:16,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785926130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:16,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:16,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:16,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405006134] [2024-06-21 21:20:16,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:16,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:16,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:16,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:16,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:16,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:16,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 149 transitions, 1708 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:16,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:16,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:16,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:17,262 INFO L124 PetriNetUnfolderBase]: 410/762 cut-off events. [2024-06-21 21:20:17,262 INFO L125 PetriNetUnfolderBase]: For 34778/34778 co-relation queries the response was YES. [2024-06-21 21:20:17,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4871 conditions, 762 events. 410/762 cut-off events. For 34778/34778 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3539 event pairs, 84 based on Foata normal form. 1/762 useless extension candidates. Maximal degree in co-relation 4790. Up to 676 conditions per place. [2024-06-21 21:20:17,267 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 122 selfloop transitions, 37 changer transitions 0/161 dead transitions. [2024-06-21 21:20:17,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 161 transitions, 2075 flow [2024-06-21 21:20:17,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:20:17,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:20:17,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 112 transitions. [2024-06-21 21:20:17,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3284457478005865 [2024-06-21 21:20:17,274 INFO L175 Difference]: Start difference. First operand has 174 places, 149 transitions, 1708 flow. Second operand 11 states and 112 transitions. [2024-06-21 21:20:17,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 161 transitions, 2075 flow [2024-06-21 21:20:17,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 161 transitions, 1962 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 21:20:17,361 INFO L231 Difference]: Finished difference. Result has 178 places, 151 transitions, 1706 flow [2024-06-21 21:20:17,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1595, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1706, PETRI_PLACES=178, PETRI_TRANSITIONS=151} [2024-06-21 21:20:17,361 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 148 predicate places. [2024-06-21 21:20:17,361 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 151 transitions, 1706 flow [2024-06-21 21:20:17,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:17,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:17,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:17,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 21:20:17,362 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 21:20:17,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:17,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1386065675, now seen corresponding path program 6 times [2024-06-21 21:20:17,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:17,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396738447] [2024-06-21 21:20:17,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:17,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:17,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:17,805 INFO 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 21:20:17,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:17,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396738447] [2024-06-21 21:20:17,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396738447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:17,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:17,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:17,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818339310] [2024-06-21 21:20:17,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:17,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:17,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:17,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:17,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:17,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:17,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 151 transitions, 1706 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:17,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:17,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:17,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:18,123 INFO L124 PetriNetUnfolderBase]: 432/798 cut-off events. [2024-06-21 21:20:18,124 INFO L125 PetriNetUnfolderBase]: For 42611/42611 co-relation queries the response was YES. [2024-06-21 21:20:18,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5112 conditions, 798 events. 432/798 cut-off events. For 42611/42611 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3721 event pairs, 73 based on Foata normal form. 4/801 useless extension candidates. Maximal degree in co-relation 5031. Up to 401 conditions per place. [2024-06-21 21:20:18,129 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 84 selfloop transitions, 89 changer transitions 0/175 dead transitions. [2024-06-21 21:20:18,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 175 transitions, 2494 flow [2024-06-21 21:20:18,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:18,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:18,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-21 21:20:18,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967741935483871 [2024-06-21 21:20:18,130 INFO L175 Difference]: Start difference. First operand has 178 places, 151 transitions, 1706 flow. Second operand 10 states and 123 transitions. [2024-06-21 21:20:18,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 175 transitions, 2494 flow [2024-06-21 21:20:18,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 175 transitions, 2355 flow, removed 17 selfloop flow, removed 11 redundant places. [2024-06-21 21:20:18,238 INFO L231 Difference]: Finished difference. Result has 177 places, 157 transitions, 1835 flow [2024-06-21 21:20:18,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1573, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1835, PETRI_PLACES=177, PETRI_TRANSITIONS=157} [2024-06-21 21:20:18,238 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 147 predicate places. [2024-06-21 21:20:18,238 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 157 transitions, 1835 flow [2024-06-21 21:20:18,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:18,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:18,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:18,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 21:20:18,239 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 21:20:18,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:18,240 INFO L85 PathProgramCache]: Analyzing trace with hash 590180895, now seen corresponding path program 7 times [2024-06-21 21:20:18,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:18,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812939311] [2024-06-21 21:20:18,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:18,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:18,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:18,680 INFO 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 21:20:18,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:18,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812939311] [2024-06-21 21:20:18,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812939311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:18,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:18,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:18,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356050102] [2024-06-21 21:20:18,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:18,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:18,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:18,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:18,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:18,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:18,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 157 transitions, 1835 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 21:20:18,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:18,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:18,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:18,939 INFO L124 PetriNetUnfolderBase]: 438/808 cut-off events. [2024-06-21 21:20:18,940 INFO L125 PetriNetUnfolderBase]: For 41677/41677 co-relation queries the response was YES. [2024-06-21 21:20:18,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5230 conditions, 808 events. 438/808 cut-off events. For 41677/41677 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3784 event pairs, 77 based on Foata normal form. 2/809 useless extension candidates. Maximal degree in co-relation 5150. Up to 403 conditions per place. [2024-06-21 21:20:18,945 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 94 selfloop transitions, 79 changer transitions 0/175 dead transitions. [2024-06-21 21:20:18,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 175 transitions, 2569 flow [2024-06-21 21:20:18,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:18,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:18,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 113 transitions. [2024-06-21 21:20:18,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4050179211469534 [2024-06-21 21:20:18,947 INFO L175 Difference]: Start difference. First operand has 177 places, 157 transitions, 1835 flow. Second operand 9 states and 113 transitions. [2024-06-21 21:20:18,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 175 transitions, 2569 flow [2024-06-21 21:20:19,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 175 transitions, 2373 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 21:20:19,048 INFO L231 Difference]: Finished difference. Result has 179 places, 159 transitions, 1828 flow [2024-06-21 21:20:19,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1641, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1828, PETRI_PLACES=179, PETRI_TRANSITIONS=159} [2024-06-21 21:20:19,049 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 149 predicate places. [2024-06-21 21:20:19,049 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 159 transitions, 1828 flow [2024-06-21 21:20:19,049 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 21:20:19,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:19,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:19,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 21:20:19,050 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 21:20:19,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:19,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1120368395, now seen corresponding path program 8 times [2024-06-21 21:20:19,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:19,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727768481] [2024-06-21 21:20:19,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:19,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:19,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:19,549 INFO 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 21:20:19,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:19,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727768481] [2024-06-21 21:20:19,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727768481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:19,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:19,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:19,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268842173] [2024-06-21 21:20:19,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:19,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:19,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:19,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:19,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:19,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:19,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 159 transitions, 1828 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 21:20:19,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:19,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:19,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:19,806 INFO L124 PetriNetUnfolderBase]: 477/872 cut-off events. [2024-06-21 21:20:19,806 INFO L125 PetriNetUnfolderBase]: For 53427/53427 co-relation queries the response was YES. [2024-06-21 21:20:19,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5841 conditions, 872 events. 477/872 cut-off events. For 53427/53427 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4140 event pairs, 86 based on Foata normal form. 4/875 useless extension candidates. Maximal degree in co-relation 5760. Up to 429 conditions per place. [2024-06-21 21:20:19,811 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 102 selfloop transitions, 80 changer transitions 0/184 dead transitions. [2024-06-21 21:20:19,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 184 transitions, 2695 flow [2024-06-21 21:20:19,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:19,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:19,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 113 transitions. [2024-06-21 21:20:19,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4050179211469534 [2024-06-21 21:20:19,813 INFO L175 Difference]: Start difference. First operand has 179 places, 159 transitions, 1828 flow. Second operand 9 states and 113 transitions. [2024-06-21 21:20:19,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 184 transitions, 2695 flow [2024-06-21 21:20:19,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 184 transitions, 2519 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 21:20:19,928 INFO L231 Difference]: Finished difference. Result has 183 places, 167 transitions, 1959 flow [2024-06-21 21:20:19,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1665, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1959, PETRI_PLACES=183, PETRI_TRANSITIONS=167} [2024-06-21 21:20:19,928 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 153 predicate places. [2024-06-21 21:20:19,928 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 167 transitions, 1959 flow [2024-06-21 21:20:19,929 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 21:20:19,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:19,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:19,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 21:20:19,929 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:19,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:19,929 INFO L85 PathProgramCache]: Analyzing trace with hash 600507764, now seen corresponding path program 2 times [2024-06-21 21:20:19,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:19,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489898351] [2024-06-21 21:20:19,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:19,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:19,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:20,549 INFO 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 21:20:20,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:20,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489898351] [2024-06-21 21:20:20,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489898351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:20,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:20,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:20,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101552584] [2024-06-21 21:20:20,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:20,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:20,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:20,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:20,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:20,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:20,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 167 transitions, 1959 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 21:20:20,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:20,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:20,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:20,800 INFO L124 PetriNetUnfolderBase]: 473/865 cut-off events. [2024-06-21 21:20:20,800 INFO L125 PetriNetUnfolderBase]: For 49539/49539 co-relation queries the response was YES. [2024-06-21 21:20:20,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5806 conditions, 865 events. 473/865 cut-off events. For 49539/49539 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4107 event pairs, 96 based on Foata normal form. 1/865 useless extension candidates. Maximal degree in co-relation 5723. Up to 787 conditions per place. [2024-06-21 21:20:20,805 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 140 selfloop transitions, 34 changer transitions 0/176 dead transitions. [2024-06-21 21:20:20,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 176 transitions, 2341 flow [2024-06-21 21:20:20,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:20,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:20,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 102 transitions. [2024-06-21 21:20:20,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32903225806451614 [2024-06-21 21:20:20,806 INFO L175 Difference]: Start difference. First operand has 183 places, 167 transitions, 1959 flow. Second operand 10 states and 102 transitions. [2024-06-21 21:20:20,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 176 transitions, 2341 flow [2024-06-21 21:20:20,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 176 transitions, 2190 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 21:20:20,923 INFO L231 Difference]: Finished difference. Result has 188 places, 168 transitions, 1899 flow [2024-06-21 21:20:20,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1809, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1899, PETRI_PLACES=188, PETRI_TRANSITIONS=168} [2024-06-21 21:20:20,923 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 158 predicate places. [2024-06-21 21:20:20,924 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 168 transitions, 1899 flow [2024-06-21 21:20:20,924 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 21:20:20,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:20,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:20,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 21:20:20,924 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:20,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:20,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1120360955, now seen corresponding path program 9 times [2024-06-21 21:20:20,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:20,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990265109] [2024-06-21 21:20:20,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:20,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:20,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:21,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:21,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:21,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990265109] [2024-06-21 21:20:21,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990265109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:21,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:21,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:21,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969205161] [2024-06-21 21:20:21,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:21,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:21,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:21,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:21,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:21,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:21,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 168 transitions, 1899 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 21:20:21,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:21,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:21,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:21,670 INFO L124 PetriNetUnfolderBase]: 469/859 cut-off events. [2024-06-21 21:20:21,671 INFO L125 PetriNetUnfolderBase]: For 49112/49112 co-relation queries the response was YES. [2024-06-21 21:20:21,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5557 conditions, 859 events. 469/859 cut-off events. For 49112/49112 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4070 event pairs, 87 based on Foata normal form. 2/860 useless extension candidates. Maximal degree in co-relation 5473. Up to 424 conditions per place. [2024-06-21 21:20:21,676 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 102 selfloop transitions, 81 changer transitions 0/185 dead transitions. [2024-06-21 21:20:21,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 185 transitions, 2657 flow [2024-06-21 21:20:21,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:21,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:21,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2024-06-21 21:20:21,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40860215053763443 [2024-06-21 21:20:21,684 INFO L175 Difference]: Start difference. First operand has 188 places, 168 transitions, 1899 flow. Second operand 9 states and 114 transitions. [2024-06-21 21:20:21,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 185 transitions, 2657 flow [2024-06-21 21:20:21,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 185 transitions, 2576 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 21:20:21,789 INFO L231 Difference]: Finished difference. Result has 189 places, 169 transitions, 1999 flow [2024-06-21 21:20:21,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1818, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1999, PETRI_PLACES=189, PETRI_TRANSITIONS=169} [2024-06-21 21:20:21,789 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 159 predicate places. [2024-06-21 21:20:21,789 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 169 transitions, 1999 flow [2024-06-21 21:20:21,790 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 21:20:21,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:21,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:21,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 21:20:21,790 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:21,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:21,790 INFO L85 PathProgramCache]: Analyzing trace with hash 846890934, now seen corresponding path program 3 times [2024-06-21 21:20:21,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:21,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912083810] [2024-06-21 21:20:21,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:21,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:21,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:22,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:22,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:22,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912083810] [2024-06-21 21:20:22,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912083810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:22,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:22,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:22,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178203984] [2024-06-21 21:20:22,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:22,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:22,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:22,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:22,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:22,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:22,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 169 transitions, 1999 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:22,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:22,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:22,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:22,816 INFO L124 PetriNetUnfolderBase]: 467/856 cut-off events. [2024-06-21 21:20:22,816 INFO L125 PetriNetUnfolderBase]: For 48202/48202 co-relation queries the response was YES. [2024-06-21 21:20:22,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5646 conditions, 856 events. 467/856 cut-off events. For 48202/48202 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4070 event pairs, 94 based on Foata normal form. 1/856 useless extension candidates. Maximal degree in co-relation 5561. Up to 778 conditions per place. [2024-06-21 21:20:22,821 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 143 selfloop transitions, 34 changer transitions 0/179 dead transitions. [2024-06-21 21:20:22,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 179 transitions, 2389 flow [2024-06-21 21:20:22,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:22,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:22,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 104 transitions. [2024-06-21 21:20:22,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33548387096774196 [2024-06-21 21:20:22,822 INFO L175 Difference]: Start difference. First operand has 189 places, 169 transitions, 1999 flow. Second operand 10 states and 104 transitions. [2024-06-21 21:20:22,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 179 transitions, 2389 flow [2024-06-21 21:20:22,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 179 transitions, 2230 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 21:20:22,930 INFO L231 Difference]: Finished difference. Result has 193 places, 170 transitions, 1931 flow [2024-06-21 21:20:22,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1842, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1931, PETRI_PLACES=193, PETRI_TRANSITIONS=170} [2024-06-21 21:20:22,930 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 163 predicate places. [2024-06-21 21:20:22,930 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 170 transitions, 1931 flow [2024-06-21 21:20:22,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:22,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:22,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:22,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 21:20:22,931 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:22,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:22,931 INFO L85 PathProgramCache]: Analyzing trace with hash 846890655, now seen corresponding path program 10 times [2024-06-21 21:20:22,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:22,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818378607] [2024-06-21 21:20:22,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:22,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:22,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:23,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:23,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:23,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818378607] [2024-06-21 21:20:23,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818378607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:23,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:23,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:23,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490837178] [2024-06-21 21:20:23,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:23,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:23,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:23,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:23,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:23,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:23,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 170 transitions, 1931 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:23,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:23,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:23,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:23,693 INFO L124 PetriNetUnfolderBase]: 469/860 cut-off events. [2024-06-21 21:20:23,693 INFO L125 PetriNetUnfolderBase]: For 50973/50973 co-relation queries the response was YES. [2024-06-21 21:20:23,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5470 conditions, 860 events. 469/860 cut-off events. For 50973/50973 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4092 event pairs, 78 based on Foata normal form. 4/863 useless extension candidates. Maximal degree in co-relation 5384. Up to 422 conditions per place. [2024-06-21 21:20:23,698 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 94 selfloop transitions, 95 changer transitions 0/191 dead transitions. [2024-06-21 21:20:23,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 191 transitions, 2855 flow [2024-06-21 21:20:23,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:23,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:23,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 126 transitions. [2024-06-21 21:20:23,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4064516129032258 [2024-06-21 21:20:23,699 INFO L175 Difference]: Start difference. First operand has 193 places, 170 transitions, 1931 flow. Second operand 10 states and 126 transitions. [2024-06-21 21:20:23,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 191 transitions, 2855 flow [2024-06-21 21:20:23,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 191 transitions, 2759 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 21:20:23,817 INFO L231 Difference]: Finished difference. Result has 194 places, 172 transitions, 2065 flow [2024-06-21 21:20:23,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1835, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2065, PETRI_PLACES=194, PETRI_TRANSITIONS=172} [2024-06-21 21:20:23,818 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 164 predicate places. [2024-06-21 21:20:23,818 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 172 transitions, 2065 flow [2024-06-21 21:20:23,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:23,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:23,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:23,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 21:20:23,819 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:23,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:23,819 INFO L85 PathProgramCache]: Analyzing trace with hash 846883215, now seen corresponding path program 11 times [2024-06-21 21:20:23,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:23,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295906488] [2024-06-21 21:20:23,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:23,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:23,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:24,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:24,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:24,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295906488] [2024-06-21 21:20:24,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295906488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:24,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:24,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:24,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225923586] [2024-06-21 21:20:24,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:24,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:24,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:24,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:24,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:24,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:24,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 172 transitions, 2065 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:24,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:24,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:24,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:24,713 INFO L124 PetriNetUnfolderBase]: 465/854 cut-off events. [2024-06-21 21:20:24,713 INFO L125 PetriNetUnfolderBase]: For 46360/46360 co-relation queries the response was YES. [2024-06-21 21:20:24,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5496 conditions, 854 events. 465/854 cut-off events. For 46360/46360 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4064 event pairs, 73 based on Foata normal form. 2/855 useless extension candidates. Maximal degree in co-relation 5410. Up to 421 conditions per place. [2024-06-21 21:20:24,720 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 89 selfloop transitions, 99 changer transitions 0/190 dead transitions. [2024-06-21 21:20:24,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 190 transitions, 2845 flow [2024-06-21 21:20:24,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:24,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:24,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-21 21:20:24,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 21:20:24,721 INFO L175 Difference]: Start difference. First operand has 194 places, 172 transitions, 2065 flow. Second operand 10 states and 124 transitions. [2024-06-21 21:20:24,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 190 transitions, 2845 flow [2024-06-21 21:20:24,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 190 transitions, 2559 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-21 21:20:24,848 INFO L231 Difference]: Finished difference. Result has 195 places, 172 transitions, 1982 flow [2024-06-21 21:20:24,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1779, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1982, PETRI_PLACES=195, PETRI_TRANSITIONS=172} [2024-06-21 21:20:24,848 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 165 predicate places. [2024-06-21 21:20:24,848 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 172 transitions, 1982 flow [2024-06-21 21:20:24,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:24,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:24,849 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 21:20:24,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 21:20:24,849 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:24,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:24,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1441677902, now seen corresponding path program 1 times [2024-06-21 21:20:24,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:24,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607251169] [2024-06-21 21:20:24,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:24,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:24,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:25,419 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 21:20:25,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:25,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607251169] [2024-06-21 21:20:25,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607251169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:25,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:25,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:25,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206060443] [2024-06-21 21:20:25,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:25,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:25,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:25,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:25,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:25,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:25,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 172 transitions, 1982 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 21:20:25,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:25,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:25,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:25,772 INFO L124 PetriNetUnfolderBase]: 469/862 cut-off events. [2024-06-21 21:20:25,772 INFO L125 PetriNetUnfolderBase]: For 47156/47156 co-relation queries the response was YES. [2024-06-21 21:20:25,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5501 conditions, 862 events. 469/862 cut-off events. For 47156/47156 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4105 event pairs, 74 based on Foata normal form. 2/863 useless extension candidates. Maximal degree in co-relation 5414. Up to 756 conditions per place. [2024-06-21 21:20:25,779 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 163 selfloop transitions, 22 changer transitions 0/187 dead transitions. [2024-06-21 21:20:25,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 187 transitions, 2392 flow [2024-06-21 21:20:25,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:25,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:25,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 91 transitions. [2024-06-21 21:20:25,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32616487455197135 [2024-06-21 21:20:25,780 INFO L175 Difference]: Start difference. First operand has 195 places, 172 transitions, 1982 flow. Second operand 9 states and 91 transitions. [2024-06-21 21:20:25,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 187 transitions, 2392 flow [2024-06-21 21:20:25,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 187 transitions, 2176 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 21:20:25,913 INFO L231 Difference]: Finished difference. Result has 196 places, 173 transitions, 1824 flow [2024-06-21 21:20:25,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1766, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1824, PETRI_PLACES=196, PETRI_TRANSITIONS=173} [2024-06-21 21:20:25,914 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 166 predicate places. [2024-06-21 21:20:25,914 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 173 transitions, 1824 flow [2024-06-21 21:20:25,914 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 21:20:25,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:25,914 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 21:20:25,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 21:20:25,915 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:25,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:25,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1438996712, now seen corresponding path program 2 times [2024-06-21 21:20:25,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:25,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430951610] [2024-06-21 21:20:25,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:25,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:25,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:26,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:26,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:26,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430951610] [2024-06-21 21:20:26,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430951610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:26,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:26,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:26,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882523011] [2024-06-21 21:20:26,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:26,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:26,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:26,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:26,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:26,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:26,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 173 transitions, 1824 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 21:20:26,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:26,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:26,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:27,181 INFO L124 PetriNetUnfolderBase]: 480/883 cut-off events. [2024-06-21 21:20:27,182 INFO L125 PetriNetUnfolderBase]: For 51880/51880 co-relation queries the response was YES. [2024-06-21 21:20:27,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5523 conditions, 883 events. 480/883 cut-off events. For 51880/51880 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4274 event pairs, 84 based on Foata normal form. 2/884 useless extension candidates. Maximal degree in co-relation 5435. Up to 693 conditions per place. [2024-06-21 21:20:27,188 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 152 selfloop transitions, 36 changer transitions 0/190 dead transitions. [2024-06-21 21:20:27,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 190 transitions, 2378 flow [2024-06-21 21:20:27,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:27,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:27,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 98 transitions. [2024-06-21 21:20:27,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35125448028673834 [2024-06-21 21:20:27,189 INFO L175 Difference]: Start difference. First operand has 196 places, 173 transitions, 1824 flow. Second operand 9 states and 98 transitions. [2024-06-21 21:20:27,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 190 transitions, 2378 flow [2024-06-21 21:20:27,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 190 transitions, 2330 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 21:20:27,313 INFO L231 Difference]: Finished difference. Result has 198 places, 175 transitions, 1874 flow [2024-06-21 21:20:27,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1776, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1874, PETRI_PLACES=198, PETRI_TRANSITIONS=175} [2024-06-21 21:20:27,313 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 168 predicate places. [2024-06-21 21:20:27,314 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 175 transitions, 1874 flow [2024-06-21 21:20:27,314 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 21:20:27,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:27,314 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 21:20:27,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 21:20:27,314 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:27,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:27,315 INFO L85 PathProgramCache]: Analyzing trace with hash 26487332, now seen corresponding path program 3 times [2024-06-21 21:20:27,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:27,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822756085] [2024-06-21 21:20:27,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:27,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:27,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:28,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:28,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:28,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822756085] [2024-06-21 21:20:28,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822756085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:28,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:28,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:28,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773528581] [2024-06-21 21:20:28,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:28,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:28,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:28,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:28,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:28,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:28,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 175 transitions, 1874 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 21:20:28,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:28,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:28,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:28,383 INFO L124 PetriNetUnfolderBase]: 513/942 cut-off events. [2024-06-21 21:20:28,383 INFO L125 PetriNetUnfolderBase]: For 57715/57715 co-relation queries the response was YES. [2024-06-21 21:20:28,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6015 conditions, 942 events. 513/942 cut-off events. For 57715/57715 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4638 event pairs, 88 based on Foata normal form. 2/943 useless extension candidates. Maximal degree in co-relation 5926. Up to 811 conditions per place. [2024-06-21 21:20:28,389 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 163 selfloop transitions, 37 changer transitions 0/202 dead transitions. [2024-06-21 21:20:28,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 202 transitions, 2578 flow [2024-06-21 21:20:28,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:28,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:28,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2024-06-21 21:20:28,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3419354838709677 [2024-06-21 21:20:28,391 INFO L175 Difference]: Start difference. First operand has 198 places, 175 transitions, 1874 flow. Second operand 10 states and 106 transitions. [2024-06-21 21:20:28,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 202 transitions, 2578 flow [2024-06-21 21:20:28,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 202 transitions, 2508 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 21:20:28,538 INFO L231 Difference]: Finished difference. Result has 205 places, 184 transitions, 2028 flow [2024-06-21 21:20:28,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1818, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2028, PETRI_PLACES=205, PETRI_TRANSITIONS=184} [2024-06-21 21:20:28,539 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 175 predicate places. [2024-06-21 21:20:28,539 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 184 transitions, 2028 flow [2024-06-21 21:20:28,540 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 21:20:28,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:28,540 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 21:20:28,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 21:20:28,540 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:28,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:28,540 INFO L85 PathProgramCache]: Analyzing trace with hash 26491982, now seen corresponding path program 4 times [2024-06-21 21:20:28,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:28,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324286923] [2024-06-21 21:20:28,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:28,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:28,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:29,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:29,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:29,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324286923] [2024-06-21 21:20:29,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324286923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:29,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:29,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:29,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171458559] [2024-06-21 21:20:29,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:29,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:29,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:29,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:29,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:29,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:29,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 184 transitions, 2028 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 21:20:29,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:29,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:29,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:29,482 INFO L124 PetriNetUnfolderBase]: 514/945 cut-off events. [2024-06-21 21:20:29,482 INFO L125 PetriNetUnfolderBase]: For 59550/59550 co-relation queries the response was YES. [2024-06-21 21:20:29,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5991 conditions, 945 events. 514/945 cut-off events. For 59550/59550 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4670 event pairs, 90 based on Foata normal form. 4/948 useless extension candidates. Maximal degree in co-relation 5898. Up to 794 conditions per place. [2024-06-21 21:20:29,488 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 151 selfloop transitions, 46 changer transitions 0/199 dead transitions. [2024-06-21 21:20:29,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 199 transitions, 2470 flow [2024-06-21 21:20:29,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:29,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:29,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 95 transitions. [2024-06-21 21:20:29,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34050179211469533 [2024-06-21 21:20:29,489 INFO L175 Difference]: Start difference. First operand has 205 places, 184 transitions, 2028 flow. Second operand 9 states and 95 transitions. [2024-06-21 21:20:29,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 199 transitions, 2470 flow [2024-06-21 21:20:29,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 199 transitions, 2424 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 21:20:29,646 INFO L231 Difference]: Finished difference. Result has 209 places, 185 transitions, 2094 flow [2024-06-21 21:20:29,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1982, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2094, PETRI_PLACES=209, PETRI_TRANSITIONS=185} [2024-06-21 21:20:29,648 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 179 predicate places. [2024-06-21 21:20:29,664 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 185 transitions, 2094 flow [2024-06-21 21:20:29,664 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 21:20:29,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:29,664 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 21:20:29,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 21:20:29,664 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:29,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:29,665 INFO L85 PathProgramCache]: Analyzing trace with hash 26492168, now seen corresponding path program 1 times [2024-06-21 21:20:29,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:29,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812760648] [2024-06-21 21:20:29,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:29,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:29,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:30,327 INFO 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 21:20:30,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:30,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812760648] [2024-06-21 21:20:30,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812760648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:30,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:30,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:30,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594931850] [2024-06-21 21:20:30,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:30,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:30,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:30,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:30,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:30,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:30,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 185 transitions, 2094 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 21:20:30,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:30,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:30,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:30,666 INFO L124 PetriNetUnfolderBase]: 509/930 cut-off events. [2024-06-21 21:20:30,667 INFO L125 PetriNetUnfolderBase]: For 53334/53334 co-relation queries the response was YES. [2024-06-21 21:20:30,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5988 conditions, 930 events. 509/930 cut-off events. For 53334/53334 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4562 event pairs, 89 based on Foata normal form. 1/930 useless extension candidates. Maximal degree in co-relation 5893. Up to 778 conditions per place. [2024-06-21 21:20:30,673 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 147 selfloop transitions, 46 changer transitions 4/199 dead transitions. [2024-06-21 21:20:30,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 199 transitions, 2528 flow [2024-06-21 21:20:30,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:30,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:30,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-06-21 21:20:30,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34408602150537637 [2024-06-21 21:20:30,674 INFO L175 Difference]: Start difference. First operand has 209 places, 185 transitions, 2094 flow. Second operand 9 states and 96 transitions. [2024-06-21 21:20:30,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 199 transitions, 2528 flow [2024-06-21 21:20:30,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 199 transitions, 2432 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 21:20:30,826 INFO L231 Difference]: Finished difference. Result has 211 places, 181 transitions, 2051 flow [2024-06-21 21:20:30,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1998, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2051, PETRI_PLACES=211, PETRI_TRANSITIONS=181} [2024-06-21 21:20:30,826 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 181 predicate places. [2024-06-21 21:20:30,826 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 181 transitions, 2051 flow [2024-06-21 21:20:30,827 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 21:20:30,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:30,827 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 21:20:30,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 21:20:30,827 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:30,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:30,827 INFO L85 PathProgramCache]: Analyzing trace with hash 475617560, now seen corresponding path program 5 times [2024-06-21 21:20:30,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:30,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219247493] [2024-06-21 21:20:30,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:30,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:30,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:31,501 INFO 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 21:20:31,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:31,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219247493] [2024-06-21 21:20:31,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219247493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:31,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:31,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:31,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69148711] [2024-06-21 21:20:31,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:31,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:31,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:31,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:31,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:31,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:31,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 181 transitions, 2051 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 21:20:31,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:31,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:31,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:31,815 INFO L124 PetriNetUnfolderBase]: 496/903 cut-off events. [2024-06-21 21:20:31,815 INFO L125 PetriNetUnfolderBase]: For 57055/57055 co-relation queries the response was YES. [2024-06-21 21:20:31,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5925 conditions, 903 events. 496/903 cut-off events. For 57055/57055 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4398 event pairs, 66 based on Foata normal form. 2/904 useless extension candidates. Maximal degree in co-relation 5829. Up to 637 conditions per place. [2024-06-21 21:20:31,822 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 118 selfloop transitions, 75 changer transitions 0/195 dead transitions. [2024-06-21 21:20:31,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 195 transitions, 2485 flow [2024-06-21 21:20:31,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:31,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:31,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-06-21 21:20:31,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2024-06-21 21:20:31,823 INFO L175 Difference]: Start difference. First operand has 211 places, 181 transitions, 2051 flow. Second operand 9 states and 102 transitions. [2024-06-21 21:20:31,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 195 transitions, 2485 flow [2024-06-21 21:20:31,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 195 transitions, 2244 flow, removed 8 selfloop flow, removed 13 redundant places. [2024-06-21 21:20:31,958 INFO L231 Difference]: Finished difference. Result has 207 places, 182 transitions, 1978 flow [2024-06-21 21:20:31,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1810, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1978, PETRI_PLACES=207, PETRI_TRANSITIONS=182} [2024-06-21 21:20:31,959 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 177 predicate places. [2024-06-21 21:20:31,959 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 182 transitions, 1978 flow [2024-06-21 21:20:31,959 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 21:20:31,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:31,959 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 21:20:31,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 21:20:31,959 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:31,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:31,960 INFO L85 PathProgramCache]: Analyzing trace with hash 2010305196, now seen corresponding path program 6 times [2024-06-21 21:20:31,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:31,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514169593] [2024-06-21 21:20:31,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:31,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:31,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:32,604 INFO 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 21:20:32,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:32,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514169593] [2024-06-21 21:20:32,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514169593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:32,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:32,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:32,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455284218] [2024-06-21 21:20:32,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:32,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:32,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:32,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:32,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:32,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:32,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 182 transitions, 1978 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 21:20:32,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:32,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:32,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:32,855 INFO L124 PetriNetUnfolderBase]: 500/911 cut-off events. [2024-06-21 21:20:32,856 INFO L125 PetriNetUnfolderBase]: For 55333/55333 co-relation queries the response was YES. [2024-06-21 21:20:32,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5873 conditions, 911 events. 500/911 cut-off events. For 55333/55333 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4455 event pairs, 68 based on Foata normal form. 2/912 useless extension candidates. Maximal degree in co-relation 5777. Up to 645 conditions per place. [2024-06-21 21:20:32,862 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 122 selfloop transitions, 72 changer transitions 0/196 dead transitions. [2024-06-21 21:20:32,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 196 transitions, 2416 flow [2024-06-21 21:20:32,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:32,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:32,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-06-21 21:20:32,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2024-06-21 21:20:32,867 INFO L175 Difference]: Start difference. First operand has 207 places, 182 transitions, 1978 flow. Second operand 9 states and 102 transitions. [2024-06-21 21:20:32,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 196 transitions, 2416 flow [2024-06-21 21:20:33,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 196 transitions, 2258 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 21:20:33,018 INFO L231 Difference]: Finished difference. Result has 209 places, 183 transitions, 1984 flow [2024-06-21 21:20:33,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1820, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1984, PETRI_PLACES=209, PETRI_TRANSITIONS=183} [2024-06-21 21:20:33,019 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 179 predicate places. [2024-06-21 21:20:33,019 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 183 transitions, 1984 flow [2024-06-21 21:20:33,019 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 21:20:33,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:33,019 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 21:20:33,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 21:20:33,020 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:33,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:33,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1157951088, now seen corresponding path program 7 times [2024-06-21 21:20:33,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:33,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005408736] [2024-06-21 21:20:33,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:33,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:33,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:33,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:33,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:33,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005408736] [2024-06-21 21:20:33,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005408736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:33,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:33,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:33,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986147864] [2024-06-21 21:20:33,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:33,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:33,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:33,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:33,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:33,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:33,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 183 transitions, 1984 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 21:20:33,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:33,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:33,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:33,898 INFO L124 PetriNetUnfolderBase]: 504/919 cut-off events. [2024-06-21 21:20:33,898 INFO L125 PetriNetUnfolderBase]: For 57165/57165 co-relation queries the response was YES. [2024-06-21 21:20:33,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5916 conditions, 919 events. 504/919 cut-off events. For 57165/57165 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 4516 event pairs, 68 based on Foata normal form. 2/920 useless extension candidates. Maximal degree in co-relation 5819. Up to 633 conditions per place. [2024-06-21 21:20:33,908 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 121 selfloop transitions, 74 changer transitions 0/197 dead transitions. [2024-06-21 21:20:33,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 197 transitions, 2424 flow [2024-06-21 21:20:33,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:33,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:33,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-06-21 21:20:33,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2024-06-21 21:20:33,909 INFO L175 Difference]: Start difference. First operand has 209 places, 183 transitions, 1984 flow. Second operand 9 states and 102 transitions. [2024-06-21 21:20:33,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 197 transitions, 2424 flow [2024-06-21 21:20:34,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 197 transitions, 2270 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 21:20:34,059 INFO L231 Difference]: Finished difference. Result has 211 places, 184 transitions, 2000 flow [2024-06-21 21:20:34,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1830, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2000, PETRI_PLACES=211, PETRI_TRANSITIONS=184} [2024-06-21 21:20:34,060 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 181 predicate places. [2024-06-21 21:20:34,060 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 184 transitions, 2000 flow [2024-06-21 21:20:34,060 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 21:20:34,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:34,060 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 21:20:34,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 21:20:34,060 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:34,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:34,061 INFO L85 PathProgramCache]: Analyzing trace with hash 298486040, now seen corresponding path program 8 times [2024-06-21 21:20:34,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:34,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176516004] [2024-06-21 21:20:34,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:34,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:34,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:34,839 INFO 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 21:20:34,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:34,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176516004] [2024-06-21 21:20:34,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176516004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:34,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:34,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:34,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240083639] [2024-06-21 21:20:34,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:34,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:34,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:34,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:34,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:34,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:34,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 184 transitions, 2000 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 21:20:34,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:34,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:34,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:35,228 INFO L124 PetriNetUnfolderBase]: 508/927 cut-off events. [2024-06-21 21:20:35,228 INFO L125 PetriNetUnfolderBase]: For 58943/58943 co-relation queries the response was YES. [2024-06-21 21:20:35,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5985 conditions, 927 events. 508/927 cut-off events. For 58943/58943 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4563 event pairs, 77 based on Foata normal form. 2/928 useless extension candidates. Maximal degree in co-relation 5887. Up to 661 conditions per place. [2024-06-21 21:20:35,236 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 129 selfloop transitions, 68 changer transitions 0/199 dead transitions. [2024-06-21 21:20:35,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 199 transitions, 2453 flow [2024-06-21 21:20:35,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:35,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:35,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2024-06-21 21:20:35,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35161290322580646 [2024-06-21 21:20:35,237 INFO L175 Difference]: Start difference. First operand has 211 places, 184 transitions, 2000 flow. Second operand 10 states and 109 transitions. [2024-06-21 21:20:35,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 199 transitions, 2453 flow [2024-06-21 21:20:35,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 199 transitions, 2293 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 21:20:35,392 INFO L231 Difference]: Finished difference. Result has 214 places, 185 transitions, 2000 flow [2024-06-21 21:20:35,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1840, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2000, PETRI_PLACES=214, PETRI_TRANSITIONS=185} [2024-06-21 21:20:35,392 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 184 predicate places. [2024-06-21 21:20:35,392 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 185 transitions, 2000 flow [2024-06-21 21:20:35,393 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 21:20:35,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:35,393 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 21:20:35,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 21:20:35,393 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:35,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:35,393 INFO L85 PathProgramCache]: Analyzing trace with hash 298481390, now seen corresponding path program 9 times [2024-06-21 21:20:35,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:35,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307469309] [2024-06-21 21:20:35,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:35,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:35,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:36,083 INFO 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 21:20:36,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:36,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307469309] [2024-06-21 21:20:36,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307469309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:36,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:36,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:36,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533947251] [2024-06-21 21:20:36,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:36,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:36,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:36,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:36,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:36,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:36,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 185 transitions, 2000 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 21:20:36,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:36,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:36,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:36,458 INFO L124 PetriNetUnfolderBase]: 512/935 cut-off events. [2024-06-21 21:20:36,458 INFO L125 PetriNetUnfolderBase]: For 60683/60683 co-relation queries the response was YES. [2024-06-21 21:20:36,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6026 conditions, 935 events. 512/935 cut-off events. For 60683/60683 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 4638 event pairs, 77 based on Foata normal form. 2/936 useless extension candidates. Maximal degree in co-relation 5927. Up to 655 conditions per place. [2024-06-21 21:20:36,465 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 129 selfloop transitions, 69 changer transitions 0/200 dead transitions. [2024-06-21 21:20:36,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 200 transitions, 2455 flow [2024-06-21 21:20:36,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:36,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:36,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 21:20:36,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 21:20:36,466 INFO L175 Difference]: Start difference. First operand has 214 places, 185 transitions, 2000 flow. Second operand 10 states and 110 transitions. [2024-06-21 21:20:36,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 200 transitions, 2455 flow [2024-06-21 21:20:36,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 200 transitions, 2305 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 21:20:36,636 INFO L231 Difference]: Finished difference. Result has 216 places, 186 transitions, 2014 flow [2024-06-21 21:20:36,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1850, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2014, PETRI_PLACES=216, PETRI_TRANSITIONS=186} [2024-06-21 21:20:36,636 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 186 predicate places. [2024-06-21 21:20:36,636 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 186 transitions, 2014 flow [2024-06-21 21:20:36,637 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 21:20:36,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:36,637 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 21:20:36,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 21:20:36,637 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:36,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:36,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1328768838, now seen corresponding path program 10 times [2024-06-21 21:20:36,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:36,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758308490] [2024-06-21 21:20:36,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:36,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:36,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:37,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:37,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:37,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758308490] [2024-06-21 21:20:37,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758308490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:37,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:37,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:37,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464105570] [2024-06-21 21:20:37,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:37,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:37,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:37,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:37,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:37,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:37,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 186 transitions, 2014 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 21:20:37,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:37,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:37,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:37,601 INFO L124 PetriNetUnfolderBase]: 516/943 cut-off events. [2024-06-21 21:20:37,601 INFO L125 PetriNetUnfolderBase]: For 62610/62610 co-relation queries the response was YES. [2024-06-21 21:20:37,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6091 conditions, 943 events. 516/943 cut-off events. For 62610/62610 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 4678 event pairs, 82 based on Foata normal form. 2/944 useless extension candidates. Maximal degree in co-relation 5991. Up to 580 conditions per place. [2024-06-21 21:20:37,607 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 129 selfloop transitions, 70 changer transitions 0/201 dead transitions. [2024-06-21 21:20:37,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 201 transitions, 2604 flow [2024-06-21 21:20:37,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:37,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:37,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2024-06-21 21:20:37,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36200716845878134 [2024-06-21 21:20:37,608 INFO L175 Difference]: Start difference. First operand has 216 places, 186 transitions, 2014 flow. Second operand 9 states and 101 transitions. [2024-06-21 21:20:37,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 201 transitions, 2604 flow [2024-06-21 21:20:37,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 201 transitions, 2450 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 21:20:37,757 INFO L231 Difference]: Finished difference. Result has 217 places, 187 transitions, 2026 flow [2024-06-21 21:20:37,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1860, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2026, PETRI_PLACES=217, PETRI_TRANSITIONS=187} [2024-06-21 21:20:37,758 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 187 predicate places. [2024-06-21 21:20:37,758 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 187 transitions, 2026 flow [2024-06-21 21:20:37,758 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 21:20:37,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:37,758 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 21:20:37,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 21:20:37,759 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:37,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:37,759 INFO L85 PathProgramCache]: Analyzing trace with hash 483570264, now seen corresponding path program 11 times [2024-06-21 21:20:37,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:37,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659705560] [2024-06-21 21:20:37,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:37,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:37,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:38,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:38,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:38,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659705560] [2024-06-21 21:20:38,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659705560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:38,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:38,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:20:38,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651029428] [2024-06-21 21:20:38,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:38,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:20:38,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:38,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:20:38,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:20:38,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:38,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 187 transitions, 2026 flow. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:38,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:38,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:38,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:38,791 INFO L124 PetriNetUnfolderBase]: 520/951 cut-off events. [2024-06-21 21:20:38,791 INFO L125 PetriNetUnfolderBase]: For 64528/64528 co-relation queries the response was YES. [2024-06-21 21:20:38,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6162 conditions, 951 events. 520/951 cut-off events. For 64528/64528 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 4734 event pairs, 75 based on Foata normal form. 2/952 useless extension candidates. Maximal degree in co-relation 6061. Up to 685 conditions per place. [2024-06-21 21:20:38,799 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 125 selfloop transitions, 75 changer transitions 0/202 dead transitions. [2024-06-21 21:20:38,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 202 transitions, 2488 flow [2024-06-21 21:20:38,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:38,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:38,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 21:20:38,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 21:20:38,801 INFO L175 Difference]: Start difference. First operand has 217 places, 187 transitions, 2026 flow. Second operand 10 states and 110 transitions. [2024-06-21 21:20:38,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 202 transitions, 2488 flow [2024-06-21 21:20:38,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 202 transitions, 2319 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 21:20:38,959 INFO L231 Difference]: Finished difference. Result has 220 places, 188 transitions, 2037 flow [2024-06-21 21:20:38,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1864, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2037, PETRI_PLACES=220, PETRI_TRANSITIONS=188} [2024-06-21 21:20:38,959 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 190 predicate places. [2024-06-21 21:20:38,959 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 188 transitions, 2037 flow [2024-06-21 21:20:38,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:38,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:38,960 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 21:20:38,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 21:20:38,960 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:38,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:38,960 INFO L85 PathProgramCache]: Analyzing trace with hash 768916398, now seen corresponding path program 1 times [2024-06-21 21:20:38,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:38,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343488483] [2024-06-21 21:20:38,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:38,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:38,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:39,701 INFO 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 21:20:39,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:39,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343488483] [2024-06-21 21:20:39,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343488483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:39,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:39,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:20:39,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659989318] [2024-06-21 21:20:39,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:39,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:20:39,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:39,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:20:39,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:20:39,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:39,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 188 transitions, 2037 flow. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:39,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:39,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:39,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:40,119 INFO L124 PetriNetUnfolderBase]: 539/994 cut-off events. [2024-06-21 21:20:40,120 INFO L125 PetriNetUnfolderBase]: For 90051/90051 co-relation queries the response was YES. [2024-06-21 21:20:40,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6116 conditions, 994 events. 539/994 cut-off events. For 90051/90051 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 5014 event pairs, 79 based on Foata normal form. 14/1007 useless extension candidates. Maximal degree in co-relation 6015. Up to 571 conditions per place. [2024-06-21 21:20:40,127 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 109 selfloop transitions, 93 changer transitions 8/212 dead transitions. [2024-06-21 21:20:40,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 212 transitions, 2564 flow [2024-06-21 21:20:40,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:20:40,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:20:40,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-21 21:20:40,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812316715542522 [2024-06-21 21:20:40,128 INFO L175 Difference]: Start difference. First operand has 220 places, 188 transitions, 2037 flow. Second operand 11 states and 130 transitions. [2024-06-21 21:20:40,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 212 transitions, 2564 flow [2024-06-21 21:20:40,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 212 transitions, 2329 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-21 21:20:40,265 INFO L231 Difference]: Finished difference. Result has 222 places, 188 transitions, 2010 flow [2024-06-21 21:20:40,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1806, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2010, PETRI_PLACES=222, PETRI_TRANSITIONS=188} [2024-06-21 21:20:40,266 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 192 predicate places. [2024-06-21 21:20:40,266 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 188 transitions, 2010 flow [2024-06-21 21:20:40,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:40,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:40,267 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 21:20:40,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 21:20:40,267 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:40,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:40,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1115559956, now seen corresponding path program 12 times [2024-06-21 21:20:40,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:40,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990315029] [2024-06-21 21:20:40,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:40,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:40,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:40,924 INFO 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 21:20:40,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:40,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990315029] [2024-06-21 21:20:40,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990315029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:40,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:40,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:40,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44903491] [2024-06-21 21:20:40,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:40,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:40,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:40,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:40,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:40,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:40,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 188 transitions, 2010 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 21:20:40,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:40,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:40,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:41,298 INFO L124 PetriNetUnfolderBase]: 517/952 cut-off events. [2024-06-21 21:20:41,298 INFO L125 PetriNetUnfolderBase]: For 64538/64538 co-relation queries the response was YES. [2024-06-21 21:20:41,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5901 conditions, 952 events. 517/952 cut-off events. For 64538/64538 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 4786 event pairs, 83 based on Foata normal form. 2/953 useless extension candidates. Maximal degree in co-relation 5800. Up to 686 conditions per place. [2024-06-21 21:20:41,304 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 136 selfloop transitions, 63 changer transitions 0/201 dead transitions. [2024-06-21 21:20:41,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 201 transitions, 2459 flow [2024-06-21 21:20:41,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:41,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:41,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2024-06-21 21:20:41,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36200716845878134 [2024-06-21 21:20:41,305 INFO L175 Difference]: Start difference. First operand has 222 places, 188 transitions, 2010 flow. Second operand 9 states and 101 transitions. [2024-06-21 21:20:41,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 201 transitions, 2459 flow [2024-06-21 21:20:41,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 201 transitions, 2259 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 21:20:41,443 INFO L231 Difference]: Finished difference. Result has 223 places, 189 transitions, 1961 flow [2024-06-21 21:20:41,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1810, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1961, PETRI_PLACES=223, PETRI_TRANSITIONS=189} [2024-06-21 21:20:41,444 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 193 predicate places. [2024-06-21 21:20:41,444 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 189 transitions, 1961 flow [2024-06-21 21:20:41,444 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 21:20:41,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:41,444 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 21:20:41,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 21:20:41,444 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:41,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:41,445 INFO L85 PathProgramCache]: Analyzing trace with hash 365011872, now seen corresponding path program 13 times [2024-06-21 21:20:41,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:41,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566658159] [2024-06-21 21:20:41,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:41,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:41,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:42,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:42,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:42,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566658159] [2024-06-21 21:20:42,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566658159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:42,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:42,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:42,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102238798] [2024-06-21 21:20:42,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:42,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:42,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:42,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:42,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:42,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:42,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 189 transitions, 1961 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 21:20:42,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:42,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:42,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:42,298 INFO L124 PetriNetUnfolderBase]: 521/960 cut-off events. [2024-06-21 21:20:42,298 INFO L125 PetriNetUnfolderBase]: For 64702/64702 co-relation queries the response was YES. [2024-06-21 21:20:42,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5858 conditions, 960 events. 521/960 cut-off events. For 64702/64702 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 4849 event pairs, 83 based on Foata normal form. 2/961 useless extension candidates. Maximal degree in co-relation 5756. Up to 659 conditions per place. [2024-06-21 21:20:42,306 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 134 selfloop transitions, 67 changer transitions 0/203 dead transitions. [2024-06-21 21:20:42,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 203 transitions, 2560 flow [2024-06-21 21:20:42,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:42,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:42,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 103 transitions. [2024-06-21 21:20:42,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36917562724014336 [2024-06-21 21:20:42,307 INFO L175 Difference]: Start difference. First operand has 223 places, 189 transitions, 1961 flow. Second operand 9 states and 103 transitions. [2024-06-21 21:20:42,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 203 transitions, 2560 flow [2024-06-21 21:20:42,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 203 transitions, 2420 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 21:20:42,484 INFO L231 Difference]: Finished difference. Result has 225 places, 190 transitions, 1980 flow [2024-06-21 21:20:42,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1821, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1980, PETRI_PLACES=225, PETRI_TRANSITIONS=190} [2024-06-21 21:20:42,484 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 195 predicate places. [2024-06-21 21:20:42,484 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 190 transitions, 1980 flow [2024-06-21 21:20:42,484 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 21:20:42,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:42,485 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 21:20:42,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 21:20:42,485 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:42,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:42,485 INFO L85 PathProgramCache]: Analyzing trace with hash 2112677806, now seen corresponding path program 1 times [2024-06-21 21:20:42,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:42,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808626096] [2024-06-21 21:20:42,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:42,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:42,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:43,049 INFO 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 21:20:43,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:43,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808626096] [2024-06-21 21:20:43,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808626096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:43,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:43,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:20:43,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400722208] [2024-06-21 21:20:43,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:43,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:20:43,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:43,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:20:43,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:20:43,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:43,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 190 transitions, 1980 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 21:20:43,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:43,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:43,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:43,344 INFO L124 PetriNetUnfolderBase]: 517/954 cut-off events. [2024-06-21 21:20:43,344 INFO L125 PetriNetUnfolderBase]: For 61025/61025 co-relation queries the response was YES. [2024-06-21 21:20:43,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5698 conditions, 954 events. 517/954 cut-off events. For 61025/61025 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 4822 event pairs, 93 based on Foata normal form. 2/955 useless extension candidates. Maximal degree in co-relation 5595. Up to 571 conditions per place. [2024-06-21 21:20:43,351 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 125 selfloop transitions, 76 changer transitions 0/203 dead transitions. [2024-06-21 21:20:43,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 203 transitions, 2420 flow [2024-06-21 21:20:43,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:43,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:43,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 107 transitions. [2024-06-21 21:20:43,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835125448028674 [2024-06-21 21:20:43,352 INFO L175 Difference]: Start difference. First operand has 225 places, 190 transitions, 1980 flow. Second operand 9 states and 107 transitions. [2024-06-21 21:20:43,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 203 transitions, 2420 flow [2024-06-21 21:20:43,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 203 transitions, 2247 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 21:20:43,508 INFO L231 Difference]: Finished difference. Result has 227 places, 190 transitions, 1969 flow [2024-06-21 21:20:43,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1807, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1969, PETRI_PLACES=227, PETRI_TRANSITIONS=190} [2024-06-21 21:20:43,508 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 197 predicate places. [2024-06-21 21:20:43,509 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 190 transitions, 1969 flow [2024-06-21 21:20:43,509 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 21:20:43,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:43,509 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 21:20:43,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 21:20:43,509 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:43,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:43,509 INFO L85 PathProgramCache]: Analyzing trace with hash 2119173236, now seen corresponding path program 2 times [2024-06-21 21:20:43,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:43,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059238885] [2024-06-21 21:20:43,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:43,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:43,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:44,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:44,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:44,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059238885] [2024-06-21 21:20:44,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059238885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:44,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:44,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:44,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495719263] [2024-06-21 21:20:44,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:44,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:44,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:44,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:44,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:44,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:44,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 190 transitions, 1969 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 21:20:44,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:44,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:44,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:44,578 INFO L124 PetriNetUnfolderBase]: 521/962 cut-off events. [2024-06-21 21:20:44,578 INFO L125 PetriNetUnfolderBase]: For 62502/62502 co-relation queries the response was YES. [2024-06-21 21:20:44,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5713 conditions, 962 events. 521/962 cut-off events. For 62502/62502 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 4885 event pairs, 111 based on Foata normal form. 2/963 useless extension candidates. Maximal degree in co-relation 5609. Up to 878 conditions per place. [2024-06-21 21:20:44,585 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 166 selfloop transitions, 33 changer transitions 0/201 dead transitions. [2024-06-21 21:20:44,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 201 transitions, 2403 flow [2024-06-21 21:20:44,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:44,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:44,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 103 transitions. [2024-06-21 21:20:44,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33225806451612905 [2024-06-21 21:20:44,587 INFO L175 Difference]: Start difference. First operand has 227 places, 190 transitions, 1969 flow. Second operand 10 states and 103 transitions. [2024-06-21 21:20:44,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 201 transitions, 2403 flow [2024-06-21 21:20:44,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 201 transitions, 2230 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 21:20:44,735 INFO L231 Difference]: Finished difference. Result has 229 places, 191 transitions, 1882 flow [2024-06-21 21:20:44,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1796, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1882, PETRI_PLACES=229, PETRI_TRANSITIONS=191} [2024-06-21 21:20:44,736 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 199 predicate places. [2024-06-21 21:20:44,736 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 191 transitions, 1882 flow [2024-06-21 21:20:44,736 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 21:20:44,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:44,736 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 21:20:44,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 21:20:44,736 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:44,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:44,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1121989046, now seen corresponding path program 14 times [2024-06-21 21:20:44,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:44,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738733811] [2024-06-21 21:20:44,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:44,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:44,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:45,340 INFO 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 21:20:45,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:45,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738733811] [2024-06-21 21:20:45,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738733811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:45,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:45,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:45,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835998805] [2024-06-21 21:20:45,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:45,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:45,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:45,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:45,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:45,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:45,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 191 transitions, 1882 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 21:20:45,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:45,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:45,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:45,638 INFO L124 PetriNetUnfolderBase]: 518/957 cut-off events. [2024-06-21 21:20:45,638 INFO L125 PetriNetUnfolderBase]: For 56820/56820 co-relation queries the response was YES. [2024-06-21 21:20:45,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5415 conditions, 957 events. 518/957 cut-off events. For 56820/56820 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 4851 event pairs, 82 based on Foata normal form. 2/958 useless extension candidates. Maximal degree in co-relation 5310. Up to 691 conditions per place. [2024-06-21 21:20:45,645 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 140 selfloop transitions, 62 changer transitions 0/204 dead transitions. [2024-06-21 21:20:45,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 204 transitions, 2322 flow [2024-06-21 21:20:45,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:20:45,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:20:45,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-06-21 21:20:45,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2024-06-21 21:20:45,646 INFO L175 Difference]: Start difference. First operand has 229 places, 191 transitions, 1882 flow. Second operand 9 states and 102 transitions. [2024-06-21 21:20:45,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 204 transitions, 2322 flow [2024-06-21 21:20:45,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 204 transitions, 2232 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 21:20:45,783 INFO L231 Difference]: Finished difference. Result has 230 places, 191 transitions, 1920 flow [2024-06-21 21:20:45,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1792, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1920, PETRI_PLACES=230, PETRI_TRANSITIONS=191} [2024-06-21 21:20:45,784 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 200 predicate places. [2024-06-21 21:20:45,784 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 191 transitions, 1920 flow [2024-06-21 21:20:45,784 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 21:20:45,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:45,785 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 21:20:45,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 21:20:45,785 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:45,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:45,785 INFO L85 PathProgramCache]: Analyzing trace with hash 779035728, now seen corresponding path program 3 times [2024-06-21 21:20:45,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:45,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826247225] [2024-06-21 21:20:45,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:45,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:45,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:46,513 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 21:20:46,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:46,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826247225] [2024-06-21 21:20:46,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826247225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:46,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:46,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:20:46,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158775671] [2024-06-21 21:20:46,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:46,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:20:46,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:46,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:20:46,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:20:46,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:46,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 191 transitions, 1920 flow. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:46,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:46,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:46,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:46,921 INFO L124 PetriNetUnfolderBase]: 522/965 cut-off events. [2024-06-21 21:20:46,922 INFO L125 PetriNetUnfolderBase]: For 58441/58441 co-relation queries the response was YES. [2024-06-21 21:20:46,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5511 conditions, 965 events. 522/965 cut-off events. For 58441/58441 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 4917 event pairs, 78 based on Foata normal form. 2/966 useless extension candidates. Maximal degree in co-relation 5405. Up to 583 conditions per place. [2024-06-21 21:20:46,927 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 109 selfloop transitions, 98 changer transitions 0/209 dead transitions. [2024-06-21 21:20:46,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 209 transitions, 2396 flow [2024-06-21 21:20:46,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:20:46,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:20:46,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 132 transitions. [2024-06-21 21:20:46,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 21:20:46,929 INFO L175 Difference]: Start difference. First operand has 230 places, 191 transitions, 1920 flow. Second operand 12 states and 132 transitions. [2024-06-21 21:20:46,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 209 transitions, 2396 flow [2024-06-21 21:20:47,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 209 transitions, 2261 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 21:20:47,076 INFO L231 Difference]: Finished difference. Result has 234 places, 192 transitions, 2003 flow [2024-06-21 21:20:47,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1785, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2003, PETRI_PLACES=234, PETRI_TRANSITIONS=192} [2024-06-21 21:20:47,077 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 204 predicate places. [2024-06-21 21:20:47,077 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 192 transitions, 2003 flow [2024-06-21 21:20:47,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:47,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:47,078 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 21:20:47,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 21:20:47,078 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:47,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:47,078 INFO L85 PathProgramCache]: Analyzing trace with hash 779391918, now seen corresponding path program 4 times [2024-06-21 21:20:47,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:47,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031703765] [2024-06-21 21:20:47,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:47,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:47,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:47,804 INFO 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 21:20:47,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:47,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031703765] [2024-06-21 21:20:47,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031703765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:47,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:47,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:20:47,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299321252] [2024-06-21 21:20:47,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:47,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:20:47,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:47,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:20:47,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:20:47,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:47,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 192 transitions, 2003 flow. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:47,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:47,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:47,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:48,183 INFO L124 PetriNetUnfolderBase]: 526/973 cut-off events. [2024-06-21 21:20:48,183 INFO L125 PetriNetUnfolderBase]: For 60056/60056 co-relation queries the response was YES. [2024-06-21 21:20:48,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5674 conditions, 973 events. 526/973 cut-off events. For 60056/60056 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 4989 event pairs, 104 based on Foata normal form. 2/974 useless extension candidates. Maximal degree in co-relation 5567. Up to 854 conditions per place. [2024-06-21 21:20:48,191 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 159 selfloop transitions, 45 changer transitions 0/206 dead transitions. [2024-06-21 21:20:48,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 206 transitions, 2457 flow [2024-06-21 21:20:48,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 21:20:48,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 21:20:48,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 127 transitions. [2024-06-21 21:20:48,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.315136476426799 [2024-06-21 21:20:48,192 INFO L175 Difference]: Start difference. First operand has 234 places, 192 transitions, 2003 flow. Second operand 13 states and 127 transitions. [2024-06-21 21:20:48,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 206 transitions, 2457 flow [2024-06-21 21:20:48,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 206 transitions, 2239 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-21 21:20:48,341 INFO L231 Difference]: Finished difference. Result has 236 places, 193 transitions, 1899 flow [2024-06-21 21:20:48,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1785, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1899, PETRI_PLACES=236, PETRI_TRANSITIONS=193} [2024-06-21 21:20:48,341 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 206 predicate places. [2024-06-21 21:20:48,341 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 193 transitions, 1899 flow [2024-06-21 21:20:48,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:48,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:48,342 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 21:20:48,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 21:20:48,342 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:48,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:48,342 INFO L85 PathProgramCache]: Analyzing trace with hash 483807848, now seen corresponding path program 2 times [2024-06-21 21:20:48,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:48,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640279338] [2024-06-21 21:20:48,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:48,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:48,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:48,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:48,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:48,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640279338] [2024-06-21 21:20:48,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640279338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:48,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:48,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:20:48,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787848353] [2024-06-21 21:20:48,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:48,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:20:48,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:48,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:20:48,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:20:49,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:49,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 193 transitions, 1899 flow. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:49,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:49,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:49,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:49,414 INFO L124 PetriNetUnfolderBase]: 532/983 cut-off events. [2024-06-21 21:20:49,415 INFO L125 PetriNetUnfolderBase]: For 61222/61222 co-relation queries the response was YES. [2024-06-21 21:20:49,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5575 conditions, 983 events. 532/983 cut-off events. For 61222/61222 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5045 event pairs, 80 based on Foata normal form. 2/984 useless extension candidates. Maximal degree in co-relation 5468. Up to 540 conditions per place. [2024-06-21 21:20:49,423 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 113 selfloop transitions, 98 changer transitions 0/213 dead transitions. [2024-06-21 21:20:49,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 213 transitions, 2553 flow [2024-06-21 21:20:49,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:20:49,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:20:49,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2024-06-21 21:20:49,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 21:20:49,432 INFO L175 Difference]: Start difference. First operand has 236 places, 193 transitions, 1899 flow. Second operand 11 states and 132 transitions. [2024-06-21 21:20:49,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 213 transitions, 2553 flow [2024-06-21 21:20:49,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 213 transitions, 2449 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-06-21 21:20:49,601 INFO L231 Difference]: Finished difference. Result has 236 places, 195 transitions, 2022 flow [2024-06-21 21:20:49,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1795, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2022, PETRI_PLACES=236, PETRI_TRANSITIONS=195} [2024-06-21 21:20:49,601 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 206 predicate places. [2024-06-21 21:20:49,601 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 195 transitions, 2022 flow [2024-06-21 21:20:49,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:49,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:49,602 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 21:20:49,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 21:20:49,602 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:49,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:49,602 INFO L85 PathProgramCache]: Analyzing trace with hash -266726906, now seen corresponding path program 5 times [2024-06-21 21:20:49,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:49,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801494979] [2024-06-21 21:20:49,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:49,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:49,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:50,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:50,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:50,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801494979] [2024-06-21 21:20:50,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801494979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:50,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:50,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:20:50,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129756862] [2024-06-21 21:20:50,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:50,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:20:50,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:50,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:20:50,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:20:50,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:50,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 195 transitions, 2022 flow. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:50,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:50,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:50,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:50,715 INFO L124 PetriNetUnfolderBase]: 529/978 cut-off events. [2024-06-21 21:20:50,716 INFO L125 PetriNetUnfolderBase]: For 57060/57060 co-relation queries the response was YES. [2024-06-21 21:20:50,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5528 conditions, 978 events. 529/978 cut-off events. For 57060/57060 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5012 event pairs, 113 based on Foata normal form. 2/979 useless extension candidates. Maximal degree in co-relation 5420. Up to 894 conditions per place. [2024-06-21 21:20:50,722 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 169 selfloop transitions, 35 changer transitions 0/206 dead transitions. [2024-06-21 21:20:50,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 206 transitions, 2454 flow [2024-06-21 21:20:50,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:20:50,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:20:50,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 112 transitions. [2024-06-21 21:20:50,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3284457478005865 [2024-06-21 21:20:50,723 INFO L175 Difference]: Start difference. First operand has 236 places, 195 transitions, 2022 flow. Second operand 11 states and 112 transitions. [2024-06-21 21:20:50,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 206 transitions, 2454 flow [2024-06-21 21:20:50,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 206 transitions, 2244 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 21:20:50,888 INFO L231 Difference]: Finished difference. Result has 238 places, 195 transitions, 1886 flow [2024-06-21 21:20:50,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1812, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1886, PETRI_PLACES=238, PETRI_TRANSITIONS=195} [2024-06-21 21:20:50,888 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 208 predicate places. [2024-06-21 21:20:50,888 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 195 transitions, 1886 flow [2024-06-21 21:20:50,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:50,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:50,889 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 21:20:50,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 21:20:50,889 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:50,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:50,889 INFO L85 PathProgramCache]: Analyzing trace with hash -266966226, now seen corresponding path program 3 times [2024-06-21 21:20:50,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:50,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042849489] [2024-06-21 21:20:50,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:50,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:50,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:51,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:51,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:51,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042849489] [2024-06-21 21:20:51,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042849489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:51,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:51,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:20:51,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793330612] [2024-06-21 21:20:51,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:51,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:20:51,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:51,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:20:51,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:20:51,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:51,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 195 transitions, 1886 flow. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:51,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:51,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:51,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:51,956 INFO L124 PetriNetUnfolderBase]: 525/972 cut-off events. [2024-06-21 21:20:51,957 INFO L125 PetriNetUnfolderBase]: For 51771/51771 co-relation queries the response was YES. [2024-06-21 21:20:51,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5172 conditions, 972 events. 525/972 cut-off events. For 51771/51771 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 4994 event pairs, 79 based on Foata normal form. 2/973 useless extension candidates. Maximal degree in co-relation 5063. Up to 532 conditions per place. [2024-06-21 21:20:51,964 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 108 selfloop transitions, 102 changer transitions 0/212 dead transitions. [2024-06-21 21:20:51,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 212 transitions, 2356 flow [2024-06-21 21:20:51,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:20:51,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:20:51,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-21 21:20:51,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812316715542522 [2024-06-21 21:20:51,965 INFO L175 Difference]: Start difference. First operand has 238 places, 195 transitions, 1886 flow. Second operand 11 states and 130 transitions. [2024-06-21 21:20:51,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 212 transitions, 2356 flow [2024-06-21 21:20:52,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 212 transitions, 2203 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-21 21:20:52,119 INFO L231 Difference]: Finished difference. Result has 239 places, 195 transitions, 1942 flow [2024-06-21 21:20:52,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1733, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1942, PETRI_PLACES=239, PETRI_TRANSITIONS=195} [2024-06-21 21:20:52,120 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 209 predicate places. [2024-06-21 21:20:52,120 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 195 transitions, 1942 flow [2024-06-21 21:20:52,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:52,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:52,120 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 21:20:52,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 21:20:52,120 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:52,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:52,121 INFO L85 PathProgramCache]: Analyzing trace with hash -626239476, now seen corresponding path program 15 times [2024-06-21 21:20:52,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:52,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766870450] [2024-06-21 21:20:52,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:52,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:52,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:52,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:52,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:52,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766870450] [2024-06-21 21:20:52,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766870450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:52,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:52,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:20:52,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150049657] [2024-06-21 21:20:52,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:52,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:20:52,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:52,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:20:52,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:20:52,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:52,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 195 transitions, 1942 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 21:20:52,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:52,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:52,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:53,040 INFO L124 PetriNetUnfolderBase]: 522/967 cut-off events. [2024-06-21 21:20:53,040 INFO L125 PetriNetUnfolderBase]: For 46775/46775 co-relation queries the response was YES. [2024-06-21 21:20:53,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5047 conditions, 967 events. 522/967 cut-off events. For 46775/46775 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 4966 event pairs, 86 based on Foata normal form. 2/968 useless extension candidates. Maximal degree in co-relation 4938. Up to 854 conditions per place. [2024-06-21 21:20:53,048 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 180 selfloop transitions, 32 changer transitions 0/214 dead transitions. [2024-06-21 21:20:53,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 214 transitions, 2435 flow [2024-06-21 21:20:53,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:53,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:53,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2024-06-21 21:20:53,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3419354838709677 [2024-06-21 21:20:53,049 INFO L175 Difference]: Start difference. First operand has 239 places, 195 transitions, 1942 flow. Second operand 10 states and 106 transitions. [2024-06-21 21:20:53,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 214 transitions, 2435 flow [2024-06-21 21:20:53,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 214 transitions, 2175 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-21 21:20:53,190 INFO L231 Difference]: Finished difference. Result has 237 places, 195 transitions, 1754 flow [2024-06-21 21:20:53,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1686, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1754, PETRI_PLACES=237, PETRI_TRANSITIONS=195} [2024-06-21 21:20:53,191 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 207 predicate places. [2024-06-21 21:20:53,191 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 195 transitions, 1754 flow [2024-06-21 21:20:53,191 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 21:20:53,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:53,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:53,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 21:20:53,191 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:53,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:53,192 INFO L85 PathProgramCache]: Analyzing trace with hash -983332290, now seen corresponding path program 1 times [2024-06-21 21:20:53,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:53,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983533681] [2024-06-21 21:20:53,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:53,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:53,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:53,843 INFO 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 21:20:53,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:53,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983533681] [2024-06-21 21:20:53,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983533681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:53,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:53,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:20:53,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123822889] [2024-06-21 21:20:53,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:53,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:20:53,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:53,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:20:53,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:20:53,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:53,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 195 transitions, 1754 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:53,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:53,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:53,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:54,194 INFO L124 PetriNetUnfolderBase]: 526/975 cut-off events. [2024-06-21 21:20:54,194 INFO L125 PetriNetUnfolderBase]: For 47688/47688 co-relation queries the response was YES. [2024-06-21 21:20:54,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4827 conditions, 975 events. 526/975 cut-off events. For 47688/47688 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5033 event pairs, 90 based on Foata normal form. 2/976 useless extension candidates. Maximal degree in co-relation 4718. Up to 861 conditions per place. [2024-06-21 21:20:54,201 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 187 selfloop transitions, 23 changer transitions 0/212 dead transitions. [2024-06-21 21:20:54,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 212 transitions, 2214 flow [2024-06-21 21:20:54,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:54,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:54,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 99 transitions. [2024-06-21 21:20:54,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3193548387096774 [2024-06-21 21:20:54,202 INFO L175 Difference]: Start difference. First operand has 237 places, 195 transitions, 1754 flow. Second operand 10 states and 99 transitions. [2024-06-21 21:20:54,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 212 transitions, 2214 flow [2024-06-21 21:20:54,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 212 transitions, 2047 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-06-21 21:20:54,316 INFO L231 Difference]: Finished difference. Result has 236 places, 196 transitions, 1643 flow [2024-06-21 21:20:54,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1587, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1643, PETRI_PLACES=236, PETRI_TRANSITIONS=196} [2024-06-21 21:20:54,317 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 206 predicate places. [2024-06-21 21:20:54,317 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 196 transitions, 1643 flow [2024-06-21 21:20:54,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:54,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:54,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:54,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 21:20:54,317 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:54,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:54,318 INFO L85 PathProgramCache]: Analyzing trace with hash 821258310, now seen corresponding path program 2 times [2024-06-21 21:20:54,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:54,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11681819] [2024-06-21 21:20:54,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:54,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:54,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:55,035 INFO 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 21:20:55,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:55,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11681819] [2024-06-21 21:20:55,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11681819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:55,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:55,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:20:55,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914845272] [2024-06-21 21:20:55,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:55,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:20:55,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:55,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:20:55,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:20:55,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:55,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 196 transitions, 1643 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:55,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:55,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:55,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:55,336 INFO L124 PetriNetUnfolderBase]: 530/983 cut-off events. [2024-06-21 21:20:55,336 INFO L125 PetriNetUnfolderBase]: For 48402/48402 co-relation queries the response was YES. [2024-06-21 21:20:55,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4686 conditions, 983 events. 530/983 cut-off events. For 48402/48402 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5086 event pairs, 89 based on Foata normal form. 2/984 useless extension candidates. Maximal degree in co-relation 4579. Up to 823 conditions per place. [2024-06-21 21:20:55,344 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 164 selfloop transitions, 47 changer transitions 0/213 dead transitions. [2024-06-21 21:20:55,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 213 transitions, 2115 flow [2024-06-21 21:20:55,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:55,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:55,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 103 transitions. [2024-06-21 21:20:55,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33225806451612905 [2024-06-21 21:20:55,345 INFO L175 Difference]: Start difference. First operand has 236 places, 196 transitions, 1643 flow. Second operand 10 states and 103 transitions. [2024-06-21 21:20:55,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 213 transitions, 2115 flow [2024-06-21 21:20:55,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 213 transitions, 2069 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 21:20:55,477 INFO L231 Difference]: Finished difference. Result has 238 places, 197 transitions, 1704 flow [2024-06-21 21:20:55,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1597, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1704, PETRI_PLACES=238, PETRI_TRANSITIONS=197} [2024-06-21 21:20:55,477 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 208 predicate places. [2024-06-21 21:20:55,478 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 197 transitions, 1704 flow [2024-06-21 21:20:55,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:55,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:55,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:55,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 21:20:55,478 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:55,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:55,478 INFO L85 PathProgramCache]: Analyzing trace with hash -907794604, now seen corresponding path program 3 times [2024-06-21 21:20:55,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:55,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312726421] [2024-06-21 21:20:55,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:55,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:55,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:56,099 INFO 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 21:20:56,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:56,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312726421] [2024-06-21 21:20:56,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312726421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:56,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:56,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:20:56,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568724531] [2024-06-21 21:20:56,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:56,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:20:56,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:56,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:20:56,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:20:56,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:56,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 197 transitions, 1704 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:56,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:56,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:56,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:56,491 INFO L124 PetriNetUnfolderBase]: 534/991 cut-off events. [2024-06-21 21:20:56,491 INFO L125 PetriNetUnfolderBase]: For 49561/49561 co-relation queries the response was YES. [2024-06-21 21:20:56,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4795 conditions, 991 events. 534/991 cut-off events. For 49561/49561 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5160 event pairs, 88 based on Foata normal form. 2/992 useless extension candidates. Maximal degree in co-relation 4687. Up to 803 conditions per place. [2024-06-21 21:20:56,498 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 166 selfloop transitions, 46 changer transitions 0/214 dead transitions. [2024-06-21 21:20:56,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 214 transitions, 2178 flow [2024-06-21 21:20:56,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:56,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:56,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 104 transitions. [2024-06-21 21:20:56,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33548387096774196 [2024-06-21 21:20:56,500 INFO L175 Difference]: Start difference. First operand has 238 places, 197 transitions, 1704 flow. Second operand 10 states and 104 transitions. [2024-06-21 21:20:56,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 214 transitions, 2178 flow [2024-06-21 21:20:56,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 214 transitions, 2083 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 21:20:56,622 INFO L231 Difference]: Finished difference. Result has 240 places, 198 transitions, 1716 flow [2024-06-21 21:20:56,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1609, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1716, PETRI_PLACES=240, PETRI_TRANSITIONS=198} [2024-06-21 21:20:56,623 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 210 predicate places. [2024-06-21 21:20:56,623 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 198 transitions, 1716 flow [2024-06-21 21:20:56,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:56,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:56,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:56,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 21:20:56,623 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:56,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:56,624 INFO L85 PathProgramCache]: Analyzing trace with hash 2067296318, now seen corresponding path program 4 times [2024-06-21 21:20:56,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:56,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360411547] [2024-06-21 21:20:56,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:56,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:56,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:57,261 INFO 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 21:20:57,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:57,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360411547] [2024-06-21 21:20:57,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360411547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:57,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:57,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:20:57,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801158025] [2024-06-21 21:20:57,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:57,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:20:57,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:57,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:20:57,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:20:57,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:57,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 198 transitions, 1716 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:57,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:57,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:57,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:57,621 INFO L124 PetriNetUnfolderBase]: 545/1012 cut-off events. [2024-06-21 21:20:57,621 INFO L125 PetriNetUnfolderBase]: For 57914/57914 co-relation queries the response was YES. [2024-06-21 21:20:57,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5064 conditions, 1012 events. 545/1012 cut-off events. For 57914/57914 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5278 event pairs, 93 based on Foata normal form. 2/1013 useless extension candidates. Maximal degree in co-relation 4955. Up to 721 conditions per place. [2024-06-21 21:20:57,628 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 172 selfloop transitions, 43 changer transitions 0/217 dead transitions. [2024-06-21 21:20:57,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 217 transitions, 2374 flow [2024-06-21 21:20:57,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:57,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:57,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 107 transitions. [2024-06-21 21:20:57,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34516129032258064 [2024-06-21 21:20:57,630 INFO L175 Difference]: Start difference. First operand has 240 places, 198 transitions, 1716 flow. Second operand 10 states and 107 transitions. [2024-06-21 21:20:57,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 217 transitions, 2374 flow [2024-06-21 21:20:57,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 217 transitions, 2279 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 21:20:57,810 INFO L231 Difference]: Finished difference. Result has 242 places, 200 transitions, 1733 flow [2024-06-21 21:20:57,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1621, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1733, PETRI_PLACES=242, PETRI_TRANSITIONS=200} [2024-06-21 21:20:57,811 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 212 predicate places. [2024-06-21 21:20:57,811 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 200 transitions, 1733 flow [2024-06-21 21:20:57,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:57,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:57,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:57,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 21:20:57,811 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:57,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:57,812 INFO L85 PathProgramCache]: Analyzing trace with hash 821108580, now seen corresponding path program 5 times [2024-06-21 21:20:57,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:57,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441312490] [2024-06-21 21:20:57,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:57,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:57,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:58,558 INFO 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 21:20:58,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:58,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441312490] [2024-06-21 21:20:58,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441312490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:58,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:58,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:20:58,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155220526] [2024-06-21 21:20:58,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:58,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:20:58,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:58,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:20:58,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:20:58,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:58,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 200 transitions, 1733 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:58,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:58,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:58,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:58,932 INFO L124 PetriNetUnfolderBase]: 542/1007 cut-off events. [2024-06-21 21:20:58,932 INFO L125 PetriNetUnfolderBase]: For 52122/52122 co-relation queries the response was YES. [2024-06-21 21:20:58,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4887 conditions, 1007 events. 542/1007 cut-off events. For 52122/52122 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5260 event pairs, 83 based on Foata normal form. 2/1008 useless extension candidates. Maximal degree in co-relation 4777. Up to 775 conditions per place. [2024-06-21 21:20:58,940 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 167 selfloop transitions, 47 changer transitions 0/216 dead transitions. [2024-06-21 21:20:58,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 216 transitions, 2201 flow [2024-06-21 21:20:58,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:20:58,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:20:58,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 105 transitions. [2024-06-21 21:20:58,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3387096774193548 [2024-06-21 21:20:58,941 INFO L175 Difference]: Start difference. First operand has 242 places, 200 transitions, 1733 flow. Second operand 10 states and 105 transitions. [2024-06-21 21:20:58,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 216 transitions, 2201 flow [2024-06-21 21:20:59,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 216 transitions, 2139 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 21:20:59,072 INFO L231 Difference]: Finished difference. Result has 246 places, 200 transitions, 1770 flow [2024-06-21 21:20:59,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1671, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1770, PETRI_PLACES=246, PETRI_TRANSITIONS=200} [2024-06-21 21:20:59,072 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 216 predicate places. [2024-06-21 21:20:59,072 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 200 transitions, 1770 flow [2024-06-21 21:20:59,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:59,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:59,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:59,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 21:20:59,073 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:20:59,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:59,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1898388056, now seen corresponding path program 6 times [2024-06-21 21:20:59,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:59,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386196764] [2024-06-21 21:20:59,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:59,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:59,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:59,817 INFO 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 21:20:59,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:59,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386196764] [2024-06-21 21:20:59,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386196764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:59,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:59,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:20:59,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996591315] [2024-06-21 21:20:59,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:59,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:20:59,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:59,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:20:59,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:20:59,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:20:59,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 200 transitions, 1770 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:59,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:59,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:20:59,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:00,156 INFO L124 PetriNetUnfolderBase]: 562/1051 cut-off events. [2024-06-21 21:21:00,156 INFO L125 PetriNetUnfolderBase]: For 90144/90144 co-relation queries the response was YES. [2024-06-21 21:21:00,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5100 conditions, 1051 events. 562/1051 cut-off events. For 90144/90144 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 5547 event pairs, 90 based on Foata normal form. 12/1062 useless extension candidates. Maximal degree in co-relation 4988. Up to 563 conditions per place. [2024-06-21 21:21:00,165 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 110 selfloop transitions, 101 changer transitions 7/220 dead transitions. [2024-06-21 21:21:00,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 220 transitions, 2284 flow [2024-06-21 21:21:00,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:00,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:00,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-06-21 21:21:00,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 21:21:00,166 INFO L175 Difference]: Start difference. First operand has 246 places, 200 transitions, 1770 flow. Second operand 10 states and 120 transitions. [2024-06-21 21:21:00,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 220 transitions, 2284 flow [2024-06-21 21:21:00,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 220 transitions, 2167 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 21:21:00,314 INFO L231 Difference]: Finished difference. Result has 247 places, 198 transitions, 1854 flow [2024-06-21 21:21:00,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1653, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1854, PETRI_PLACES=247, PETRI_TRANSITIONS=198} [2024-06-21 21:21:00,314 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 217 predicate places. [2024-06-21 21:21:00,314 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 198 transitions, 1854 flow [2024-06-21 21:21:00,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:00,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:00,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:00,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 21:21:00,315 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:00,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:00,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1898111350, now seen corresponding path program 1 times [2024-06-21 21:21:00,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:00,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633208514] [2024-06-21 21:21:00,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:00,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:00,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:00,833 INFO 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 21:21:00,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:00,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633208514] [2024-06-21 21:21:00,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633208514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:00,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:00,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:21:00,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213580628] [2024-06-21 21:21:00,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:00,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:21:00,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:00,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:21:00,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:21:00,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:00,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 198 transitions, 1854 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 21:21:00,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:00,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:00,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:01,157 INFO L124 PetriNetUnfolderBase]: 572/1077 cut-off events. [2024-06-21 21:21:01,157 INFO L125 PetriNetUnfolderBase]: For 107456/107456 co-relation queries the response was YES. [2024-06-21 21:21:01,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5999 conditions, 1077 events. 572/1077 cut-off events. For 107456/107456 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 5675 event pairs, 94 based on Foata normal form. 8/1084 useless extension candidates. Maximal degree in co-relation 5886. Up to 525 conditions per place. [2024-06-21 21:21:01,166 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 112 selfloop transitions, 100 changer transitions 6/220 dead transitions. [2024-06-21 21:21:01,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 220 transitions, 2546 flow [2024-06-21 21:21:01,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:01,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:01,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2024-06-21 21:21:01,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3903225806451613 [2024-06-21 21:21:01,167 INFO L175 Difference]: Start difference. First operand has 247 places, 198 transitions, 1854 flow. Second operand 10 states and 121 transitions. [2024-06-21 21:21:01,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 220 transitions, 2546 flow [2024-06-21 21:21:01,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 220 transitions, 2320 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 21:21:01,412 INFO L231 Difference]: Finished difference. Result has 248 places, 197 transitions, 1825 flow [2024-06-21 21:21:01,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1628, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1825, PETRI_PLACES=248, PETRI_TRANSITIONS=197} [2024-06-21 21:21:01,413 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 218 predicate places. [2024-06-21 21:21:01,413 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 197 transitions, 1825 flow [2024-06-21 21:21:01,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 21:21:01,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:01,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:01,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 21:21:01,414 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:01,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:01,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1859249340, now seen corresponding path program 7 times [2024-06-21 21:21:01,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:01,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418929877] [2024-06-21 21:21:01,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:01,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:01,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:02,116 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 21:21:02,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:02,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418929877] [2024-06-21 21:21:02,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418929877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:02,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:02,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:21:02,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440159284] [2024-06-21 21:21:02,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:02,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:21:02,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:02,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:21:02,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:21:02,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:02,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 197 transitions, 1825 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:02,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:02,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:02,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:02,529 INFO L124 PetriNetUnfolderBase]: 560/1053 cut-off events. [2024-06-21 21:21:02,529 INFO L125 PetriNetUnfolderBase]: For 86894/86894 co-relation queries the response was YES. [2024-06-21 21:21:02,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5916 conditions, 1053 events. 560/1053 cut-off events. For 86894/86894 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 5538 event pairs, 96 based on Foata normal form. 2/1054 useless extension candidates. Maximal degree in co-relation 5802. Up to 613 conditions per place. [2024-06-21 21:21:02,540 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 116 selfloop transitions, 95 changer transitions 0/213 dead transitions. [2024-06-21 21:21:02,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 213 transitions, 2303 flow [2024-06-21 21:21:02,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:02,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:02,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-06-21 21:21:02,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36774193548387096 [2024-06-21 21:21:02,541 INFO L175 Difference]: Start difference. First operand has 248 places, 197 transitions, 1825 flow. Second operand 10 states and 114 transitions. [2024-06-21 21:21:02,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 213 transitions, 2303 flow [2024-06-21 21:21:02,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 213 transitions, 2101 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 21:21:02,761 INFO L231 Difference]: Finished difference. Result has 248 places, 198 transitions, 1833 flow [2024-06-21 21:21:02,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1623, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1833, PETRI_PLACES=248, PETRI_TRANSITIONS=198} [2024-06-21 21:21:02,761 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 218 predicate places. [2024-06-21 21:21:02,761 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 198 transitions, 1833 flow [2024-06-21 21:21:02,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:02,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:02,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:02,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 21:21:02,762 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:02,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:02,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1859243760, now seen corresponding path program 8 times [2024-06-21 21:21:02,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:02,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577073575] [2024-06-21 21:21:02,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:02,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:02,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:03,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:03,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:03,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577073575] [2024-06-21 21:21:03,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577073575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:03,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:03,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:21:03,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705916] [2024-06-21 21:21:03,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:03,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:21:03,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:03,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:21:03,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:21:03,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:03,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 198 transitions, 1833 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:03,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:03,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:03,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:03,942 INFO L124 PetriNetUnfolderBase]: 542/1015 cut-off events. [2024-06-21 21:21:03,942 INFO L125 PetriNetUnfolderBase]: For 56074/56074 co-relation queries the response was YES. [2024-06-21 21:21:03,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5106 conditions, 1015 events. 542/1015 cut-off events. For 56074/56074 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5346 event pairs, 82 based on Foata normal form. 2/1016 useless extension candidates. Maximal degree in co-relation 4992. Up to 555 conditions per place. [2024-06-21 21:21:03,951 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 115 selfloop transitions, 97 changer transitions 0/214 dead transitions. [2024-06-21 21:21:03,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 214 transitions, 2313 flow [2024-06-21 21:21:03,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:03,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:03,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-21 21:21:03,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-21 21:21:03,952 INFO L175 Difference]: Start difference. First operand has 248 places, 198 transitions, 1833 flow. Second operand 10 states and 115 transitions. [2024-06-21 21:21:03,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 214 transitions, 2313 flow [2024-06-21 21:21:04,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 214 transitions, 2113 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 21:21:04,120 INFO L231 Difference]: Finished difference. Result has 250 places, 199 transitions, 1849 flow [2024-06-21 21:21:04,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1633, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1849, PETRI_PLACES=250, PETRI_TRANSITIONS=199} [2024-06-21 21:21:04,121 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 220 predicate places. [2024-06-21 21:21:04,121 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 199 transitions, 1849 flow [2024-06-21 21:21:04,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:04,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:04,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:04,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 21:21:04,121 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:04,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:04,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1659947550, now seen corresponding path program 9 times [2024-06-21 21:21:04,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:04,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781561382] [2024-06-21 21:21:04,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:04,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:04,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:04,770 INFO 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 21:21:04,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:04,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781561382] [2024-06-21 21:21:04,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781561382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:04,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:04,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:21:04,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624231897] [2024-06-21 21:21:04,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:04,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:21:04,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:04,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:21:04,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:21:04,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:04,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 199 transitions, 1849 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:04,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:04,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:04,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:05,119 INFO L124 PetriNetUnfolderBase]: 546/1023 cut-off events. [2024-06-21 21:21:05,119 INFO L125 PetriNetUnfolderBase]: For 57383/57383 co-relation queries the response was YES. [2024-06-21 21:21:05,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5163 conditions, 1023 events. 546/1023 cut-off events. For 57383/57383 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 5382 event pairs, 86 based on Foata normal form. 2/1024 useless extension candidates. Maximal degree in co-relation 5048. Up to 583 conditions per place. [2024-06-21 21:21:05,127 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 121 selfloop transitions, 92 changer transitions 0/215 dead transitions. [2024-06-21 21:21:05,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 215 transitions, 2335 flow [2024-06-21 21:21:05,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:05,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:05,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-06-21 21:21:05,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36774193548387096 [2024-06-21 21:21:05,129 INFO L175 Difference]: Start difference. First operand has 250 places, 199 transitions, 1849 flow. Second operand 10 states and 114 transitions. [2024-06-21 21:21:05,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 215 transitions, 2335 flow [2024-06-21 21:21:05,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 215 transitions, 2129 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 21:21:05,297 INFO L231 Difference]: Finished difference. Result has 252 places, 200 transitions, 1851 flow [2024-06-21 21:21:05,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1643, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1851, PETRI_PLACES=252, PETRI_TRANSITIONS=200} [2024-06-21 21:21:05,297 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 222 predicate places. [2024-06-21 21:21:05,297 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 200 transitions, 1851 flow [2024-06-21 21:21:05,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:05,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:05,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:05,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 21:21:05,298 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:05,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:05,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1536599922, now seen corresponding path program 10 times [2024-06-21 21:21:05,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:05,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199456598] [2024-06-21 21:21:05,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:05,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:05,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:05,964 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 21:21:05,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:05,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199456598] [2024-06-21 21:21:05,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199456598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:05,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:05,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:21:05,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160219108] [2024-06-21 21:21:05,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:05,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:21:05,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:05,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:21:05,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:21:06,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:06,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 200 transitions, 1851 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:06,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:06,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:06,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:06,356 INFO L124 PetriNetUnfolderBase]: 550/1031 cut-off events. [2024-06-21 21:21:06,357 INFO L125 PetriNetUnfolderBase]: For 58678/58678 co-relation queries the response was YES. [2024-06-21 21:21:06,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5188 conditions, 1031 events. 550/1031 cut-off events. For 58678/58678 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 5459 event pairs, 86 based on Foata normal form. 2/1032 useless extension candidates. Maximal degree in co-relation 5072. Up to 577 conditions per place. [2024-06-21 21:21:06,366 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 121 selfloop transitions, 93 changer transitions 0/216 dead transitions. [2024-06-21 21:21:06,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 216 transitions, 2339 flow [2024-06-21 21:21:06,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:06,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:06,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-21 21:21:06,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-21 21:21:06,367 INFO L175 Difference]: Start difference. First operand has 252 places, 200 transitions, 1851 flow. Second operand 10 states and 115 transitions. [2024-06-21 21:21:06,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 216 transitions, 2339 flow [2024-06-21 21:21:06,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 216 transitions, 2141 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 21:21:06,513 INFO L231 Difference]: Finished difference. Result has 254 places, 201 transitions, 1865 flow [2024-06-21 21:21:06,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1653, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1865, PETRI_PLACES=254, PETRI_TRANSITIONS=201} [2024-06-21 21:21:06,514 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 224 predicate places. [2024-06-21 21:21:06,514 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 201 transitions, 1865 flow [2024-06-21 21:21:06,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:06,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:06,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:06,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 21:21:06,515 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:06,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:06,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1006765822, now seen corresponding path program 11 times [2024-06-21 21:21:06,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:06,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107615069] [2024-06-21 21:21:06,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:06,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:06,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:07,287 INFO 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 21:21:07,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:07,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107615069] [2024-06-21 21:21:07,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107615069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:07,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:07,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:21:07,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748339655] [2024-06-21 21:21:07,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:07,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:21:07,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:07,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:21:07,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:21:07,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:07,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 201 transitions, 1865 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:07,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:07,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:07,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:07,708 INFO L124 PetriNetUnfolderBase]: 554/1039 cut-off events. [2024-06-21 21:21:07,708 INFO L125 PetriNetUnfolderBase]: For 60044/60044 co-relation queries the response was YES. [2024-06-21 21:21:07,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5241 conditions, 1039 events. 554/1039 cut-off events. For 60044/60044 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 5517 event pairs, 90 based on Foata normal form. 2/1040 useless extension candidates. Maximal degree in co-relation 5124. Up to 537 conditions per place. [2024-06-21 21:21:07,716 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 118 selfloop transitions, 97 changer transitions 0/217 dead transitions. [2024-06-21 21:21:07,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 217 transitions, 2355 flow [2024-06-21 21:21:07,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:07,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:07,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-21 21:21:07,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-21 21:21:07,718 INFO L175 Difference]: Start difference. First operand has 254 places, 201 transitions, 1865 flow. Second operand 10 states and 115 transitions. [2024-06-21 21:21:07,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 217 transitions, 2355 flow [2024-06-21 21:21:07,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 217 transitions, 2153 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 21:21:07,847 INFO L231 Difference]: Finished difference. Result has 256 places, 202 transitions, 1885 flow [2024-06-21 21:21:07,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1663, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1885, PETRI_PLACES=256, PETRI_TRANSITIONS=202} [2024-06-21 21:21:07,847 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 226 predicate places. [2024-06-21 21:21:07,848 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 202 transitions, 1885 flow [2024-06-21 21:21:07,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:07,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:07,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:07,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 21:21:07,848 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:07,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:07,849 INFO L85 PathProgramCache]: Analyzing trace with hash -2003424126, now seen corresponding path program 12 times [2024-06-21 21:21:07,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:07,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335525798] [2024-06-21 21:21:07,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:07,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:07,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:08,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:08,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:08,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335525798] [2024-06-21 21:21:08,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335525798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:08,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:08,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:21:08,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860510248] [2024-06-21 21:21:08,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:08,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:21:08,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:08,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:21:08,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:21:08,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:08,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 202 transitions, 1885 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:08,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:08,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:08,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:09,137 INFO L124 PetriNetUnfolderBase]: 558/1047 cut-off events. [2024-06-21 21:21:09,137 INFO L125 PetriNetUnfolderBase]: For 61566/61566 co-relation queries the response was YES. [2024-06-21 21:21:09,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5308 conditions, 1047 events. 558/1047 cut-off events. For 61566/61566 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 5590 event pairs, 95 based on Foata normal form. 2/1048 useless extension candidates. Maximal degree in co-relation 5190. Up to 607 conditions per place. [2024-06-21 21:21:09,144 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 119 selfloop transitions, 98 changer transitions 0/219 dead transitions. [2024-06-21 21:21:09,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 219 transitions, 2390 flow [2024-06-21 21:21:09,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:21:09,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:21:09,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 121 transitions. [2024-06-21 21:21:09,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 21:21:09,145 INFO L175 Difference]: Start difference. First operand has 256 places, 202 transitions, 1885 flow. Second operand 11 states and 121 transitions. [2024-06-21 21:21:09,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 219 transitions, 2390 flow [2024-06-21 21:21:09,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 219 transitions, 2178 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 21:21:09,295 INFO L231 Difference]: Finished difference. Result has 259 places, 203 transitions, 1899 flow [2024-06-21 21:21:09,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1673, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1899, PETRI_PLACES=259, PETRI_TRANSITIONS=203} [2024-06-21 21:21:09,301 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 229 predicate places. [2024-06-21 21:21:09,301 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 203 transitions, 1899 flow [2024-06-21 21:21:09,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:09,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:09,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:09,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 21:21:09,302 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:09,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:09,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1761559340, now seen corresponding path program 13 times [2024-06-21 21:21:09,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:09,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162113890] [2024-06-21 21:21:09,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:09,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:09,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:10,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:10,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:10,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162113890] [2024-06-21 21:21:10,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162113890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:10,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:10,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:21:10,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160093532] [2024-06-21 21:21:10,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:10,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:21:10,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:10,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:21:10,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:21:10,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:10,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 203 transitions, 1899 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:10,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:10,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:10,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:10,594 INFO L124 PetriNetUnfolderBase]: 562/1055 cut-off events. [2024-06-21 21:21:10,594 INFO L125 PetriNetUnfolderBase]: For 62872/62872 co-relation queries the response was YES. [2024-06-21 21:21:10,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5355 conditions, 1055 events. 562/1055 cut-off events. For 62872/62872 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 5656 event pairs, 97 based on Foata normal form. 2/1056 useless extension candidates. Maximal degree in co-relation 5236. Up to 601 conditions per place. [2024-06-21 21:21:10,603 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 119 selfloop transitions, 99 changer transitions 0/220 dead transitions. [2024-06-21 21:21:10,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 220 transitions, 2406 flow [2024-06-21 21:21:10,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:21:10,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:21:10,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-06-21 21:21:10,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35777126099706746 [2024-06-21 21:21:10,605 INFO L175 Difference]: Start difference. First operand has 259 places, 203 transitions, 1899 flow. Second operand 11 states and 122 transitions. [2024-06-21 21:21:10,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 220 transitions, 2406 flow [2024-06-21 21:21:10,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 220 transitions, 2190 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-21 21:21:10,776 INFO L231 Difference]: Finished difference. Result has 261 places, 204 transitions, 1913 flow [2024-06-21 21:21:10,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1683, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1913, PETRI_PLACES=261, PETRI_TRANSITIONS=204} [2024-06-21 21:21:10,776 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 231 predicate places. [2024-06-21 21:21:10,777 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 204 transitions, 1913 flow [2024-06-21 21:21:10,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:10,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:10,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:10,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 21:21:10,777 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:10,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:10,778 INFO L85 PathProgramCache]: Analyzing trace with hash 662989786, now seen corresponding path program 14 times [2024-06-21 21:21:10,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:10,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582881954] [2024-06-21 21:21:10,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:10,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:10,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:11,486 INFO 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 21:21:11,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:11,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582881954] [2024-06-21 21:21:11,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582881954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:11,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:11,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:21:11,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014902867] [2024-06-21 21:21:11,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:11,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:21:11,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:11,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:21:11,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:21:11,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:11,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 204 transitions, 1913 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:11,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:11,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:11,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:11,867 INFO L124 PetriNetUnfolderBase]: 566/1063 cut-off events. [2024-06-21 21:21:11,867 INFO L125 PetriNetUnfolderBase]: For 64287/64287 co-relation queries the response was YES. [2024-06-21 21:21:11,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5408 conditions, 1063 events. 566/1063 cut-off events. For 64287/64287 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 5713 event pairs, 100 based on Foata normal form. 2/1064 useless extension candidates. Maximal degree in co-relation 5288. Up to 587 conditions per place. [2024-06-21 21:21:11,879 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 121 selfloop transitions, 97 changer transitions 0/220 dead transitions. [2024-06-21 21:21:11,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 220 transitions, 2415 flow [2024-06-21 21:21:11,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:11,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:11,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-06-21 21:21:11,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36774193548387096 [2024-06-21 21:21:11,880 INFO L175 Difference]: Start difference. First operand has 261 places, 204 transitions, 1913 flow. Second operand 10 states and 114 transitions. [2024-06-21 21:21:11,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 220 transitions, 2415 flow [2024-06-21 21:21:12,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 220 transitions, 2195 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 21:21:12,065 INFO L231 Difference]: Finished difference. Result has 262 places, 205 transitions, 1921 flow [2024-06-21 21:21:12,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1693, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1921, PETRI_PLACES=262, PETRI_TRANSITIONS=205} [2024-06-21 21:21:12,066 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 232 predicate places. [2024-06-21 21:21:12,066 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 205 transitions, 1921 flow [2024-06-21 21:21:12,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:12,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:12,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:12,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 21:21:12,067 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:12,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:12,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1189393116, now seen corresponding path program 15 times [2024-06-21 21:21:12,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:12,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960094315] [2024-06-21 21:21:12,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:12,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:12,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:12,805 INFO 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 21:21:12,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:12,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960094315] [2024-06-21 21:21:12,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960094315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:12,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:12,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:21:12,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472309266] [2024-06-21 21:21:12,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:12,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:21:12,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:12,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:21:12,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:21:12,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:12,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 205 transitions, 1921 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:12,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:12,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:12,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:13,264 INFO L124 PetriNetUnfolderBase]: 599/1130 cut-off events. [2024-06-21 21:21:13,265 INFO L125 PetriNetUnfolderBase]: For 110780/110780 co-relation queries the response was YES. [2024-06-21 21:21:13,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6575 conditions, 1130 events. 599/1130 cut-off events. For 110780/110780 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 6097 event pairs, 121 based on Foata normal form. 2/1131 useless extension candidates. Maximal degree in co-relation 6454. Up to 400 conditions per place. [2024-06-21 21:21:13,276 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 120 selfloop transitions, 104 changer transitions 0/226 dead transitions. [2024-06-21 21:21:13,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 226 transitions, 2651 flow [2024-06-21 21:21:13,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:13,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:13,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 118 transitions. [2024-06-21 21:21:13,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38064516129032255 [2024-06-21 21:21:13,277 INFO L175 Difference]: Start difference. First operand has 262 places, 205 transitions, 1921 flow. Second operand 10 states and 118 transitions. [2024-06-21 21:21:13,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 226 transitions, 2651 flow [2024-06-21 21:21:13,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 226 transitions, 2433 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 21:21:13,598 INFO L231 Difference]: Finished difference. Result has 264 places, 206 transitions, 1945 flow [2024-06-21 21:21:13,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1703, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1945, PETRI_PLACES=264, PETRI_TRANSITIONS=206} [2024-06-21 21:21:13,598 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 234 predicate places. [2024-06-21 21:21:13,599 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 206 transitions, 1945 flow [2024-06-21 21:21:13,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:13,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:13,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:13,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 21:21:13,599 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:13,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:13,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1933671104, now seen corresponding path program 16 times [2024-06-21 21:21:13,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:13,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076396040] [2024-06-21 21:21:13,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:13,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:13,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:14,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:14,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:14,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076396040] [2024-06-21 21:21:14,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076396040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:14,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:14,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:21:14,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527333048] [2024-06-21 21:21:14,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:14,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:21:14,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:14,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:21:14,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:21:14,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:14,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 206 transitions, 1945 flow. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 21:21:14,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:14,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:14,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:14,944 INFO L124 PetriNetUnfolderBase]: 619/1174 cut-off events. [2024-06-21 21:21:14,945 INFO L125 PetriNetUnfolderBase]: For 159042/159042 co-relation queries the response was YES. [2024-06-21 21:21:14,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6764 conditions, 1174 events. 619/1174 cut-off events. For 159042/159042 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 6374 event pairs, 106 based on Foata normal form. 12/1185 useless extension candidates. Maximal degree in co-relation 6642. Up to 692 conditions per place. [2024-06-21 21:21:14,955 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 118 selfloop transitions, 102 changer transitions 8/230 dead transitions. [2024-06-21 21:21:14,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 230 transitions, 2509 flow [2024-06-21 21:21:14,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:21:14,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:21:14,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 139 transitions. [2024-06-21 21:21:14,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3736559139784946 [2024-06-21 21:21:14,956 INFO L175 Difference]: Start difference. First operand has 264 places, 206 transitions, 1945 flow. Second operand 12 states and 139 transitions. [2024-06-21 21:21:14,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 230 transitions, 2509 flow [2024-06-21 21:21:15,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 230 transitions, 2297 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-21 21:21:15,337 INFO L231 Difference]: Finished difference. Result has 268 places, 203 transitions, 1949 flow [2024-06-21 21:21:15,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1736, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1949, PETRI_PLACES=268, PETRI_TRANSITIONS=203} [2024-06-21 21:21:15,337 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 238 predicate places. [2024-06-21 21:21:15,337 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 203 transitions, 1949 flow [2024-06-21 21:21:15,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 21:21:15,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:15,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:15,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 21:21:15,338 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:15,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:15,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1619695168, now seen corresponding path program 2 times [2024-06-21 21:21:15,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:15,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710501259] [2024-06-21 21:21:15,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:15,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:15,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:15,934 INFO 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 21:21:15,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:15,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710501259] [2024-06-21 21:21:15,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710501259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:15,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:15,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:21:15,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895245876] [2024-06-21 21:21:15,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:15,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:21:15,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:15,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:21:15,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:21:15,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:15,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 203 transitions, 1949 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:15,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:15,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:15,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:16,380 INFO L124 PetriNetUnfolderBase]: 620/1185 cut-off events. [2024-06-21 21:21:16,381 INFO L125 PetriNetUnfolderBase]: For 170171/170171 co-relation queries the response was YES. [2024-06-21 21:21:16,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7329 conditions, 1185 events. 620/1185 cut-off events. For 170171/170171 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 6478 event pairs, 118 based on Foata normal form. 8/1192 useless extension candidates. Maximal degree in co-relation 7207. Up to 668 conditions per place. [2024-06-21 21:21:16,391 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 119 selfloop transitions, 94 changer transitions 11/226 dead transitions. [2024-06-21 21:21:16,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 226 transitions, 2665 flow [2024-06-21 21:21:16,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:21:16,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:21:16,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2024-06-21 21:21:16,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 21:21:16,408 INFO L175 Difference]: Start difference. First operand has 268 places, 203 transitions, 1949 flow. Second operand 11 states and 132 transitions. [2024-06-21 21:21:16,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 226 transitions, 2665 flow [2024-06-21 21:21:16,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 226 transitions, 2434 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-06-21 21:21:16,904 INFO L231 Difference]: Finished difference. Result has 268 places, 197 transitions, 1871 flow [2024-06-21 21:21:16,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1718, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1871, PETRI_PLACES=268, PETRI_TRANSITIONS=197} [2024-06-21 21:21:16,905 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 238 predicate places. [2024-06-21 21:21:16,905 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 197 transitions, 1871 flow [2024-06-21 21:21:16,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:16,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:16,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:16,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 21:21:16,906 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:16,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:16,906 INFO L85 PathProgramCache]: Analyzing trace with hash 2105999718, now seen corresponding path program 17 times [2024-06-21 21:21:16,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:16,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164786051] [2024-06-21 21:21:16,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:16,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:16,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:17,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:17,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:17,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164786051] [2024-06-21 21:21:17,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164786051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:17,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:17,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:21:17,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298993996] [2024-06-21 21:21:17,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:17,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:21:17,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:17,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:21:17,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:21:17,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:17,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 197 transitions, 1871 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:17,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:17,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:17,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:17,978 INFO L124 PetriNetUnfolderBase]: 598/1139 cut-off events. [2024-06-21 21:21:17,978 INFO L125 PetriNetUnfolderBase]: For 146072/146072 co-relation queries the response was YES. [2024-06-21 21:21:17,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7194 conditions, 1139 events. 598/1139 cut-off events. For 146072/146072 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6122 event pairs, 132 based on Foata normal form. 2/1140 useless extension candidates. Maximal degree in co-relation 7071. Up to 713 conditions per place. [2024-06-21 21:21:17,988 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 124 selfloop transitions, 87 changer transitions 0/213 dead transitions. [2024-06-21 21:21:17,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 213 transitions, 2366 flow [2024-06-21 21:21:17,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:17,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:17,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 118 transitions. [2024-06-21 21:21:17,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38064516129032255 [2024-06-21 21:21:17,989 INFO L175 Difference]: Start difference. First operand has 268 places, 197 transitions, 1871 flow. Second operand 10 states and 118 transitions. [2024-06-21 21:21:17,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 213 transitions, 2366 flow [2024-06-21 21:21:18,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 213 transitions, 2171 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-21 21:21:18,463 INFO L231 Difference]: Finished difference. Result has 261 places, 198 transitions, 1887 flow [2024-06-21 21:21:18,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1676, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1887, PETRI_PLACES=261, PETRI_TRANSITIONS=198} [2024-06-21 21:21:18,464 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 231 predicate places. [2024-06-21 21:21:18,464 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 198 transitions, 1887 flow [2024-06-21 21:21:18,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:18,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:18,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:18,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 21:21:18,465 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:18,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:18,465 INFO L85 PathProgramCache]: Analyzing trace with hash 222477406, now seen corresponding path program 18 times [2024-06-21 21:21:18,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:18,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960132707] [2024-06-21 21:21:18,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:18,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:18,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:19,140 INFO 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 21:21:19,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:19,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960132707] [2024-06-21 21:21:19,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960132707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:19,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:19,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:21:19,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257276458] [2024-06-21 21:21:19,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:19,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:21:19,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:19,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:21:19,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:21:19,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:19,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 198 transitions, 1887 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:19,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:19,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:19,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:19,568 INFO L124 PetriNetUnfolderBase]: 602/1147 cut-off events. [2024-06-21 21:21:19,568 INFO L125 PetriNetUnfolderBase]: For 138062/138062 co-relation queries the response was YES. [2024-06-21 21:21:19,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7163 conditions, 1147 events. 602/1147 cut-off events. For 138062/138062 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 6179 event pairs, 132 based on Foata normal form. 2/1148 useless extension candidates. Maximal degree in co-relation 7043. Up to 571 conditions per place. [2024-06-21 21:21:19,579 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 126 selfloop transitions, 91 changer transitions 0/219 dead transitions. [2024-06-21 21:21:19,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 219 transitions, 2608 flow [2024-06-21 21:21:19,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:19,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:19,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-21 21:21:19,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 21:21:19,580 INFO L175 Difference]: Start difference. First operand has 261 places, 198 transitions, 1887 flow. Second operand 10 states and 124 transitions. [2024-06-21 21:21:19,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 219 transitions, 2608 flow [2024-06-21 21:21:19,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 219 transitions, 2408 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 21:21:19,982 INFO L231 Difference]: Finished difference. Result has 263 places, 199 transitions, 1906 flow [2024-06-21 21:21:19,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1687, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1906, PETRI_PLACES=263, PETRI_TRANSITIONS=199} [2024-06-21 21:21:19,983 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 233 predicate places. [2024-06-21 21:21:19,983 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 199 transitions, 1906 flow [2024-06-21 21:21:19,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:19,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:19,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:19,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 21:21:19,983 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:19,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:19,984 INFO L85 PathProgramCache]: Analyzing trace with hash 222621556, now seen corresponding path program 19 times [2024-06-21 21:21:19,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:19,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944320869] [2024-06-21 21:21:19,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:19,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:19,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:20,648 INFO 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 21:21:20,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:20,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944320869] [2024-06-21 21:21:20,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944320869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:20,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:20,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:21:20,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614068343] [2024-06-21 21:21:20,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:20,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:21:20,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:20,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:21:20,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:21:20,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:20,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 199 transitions, 1906 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:20,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:20,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:20,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:21,174 INFO L124 PetriNetUnfolderBase]: 606/1155 cut-off events. [2024-06-21 21:21:21,174 INFO L125 PetriNetUnfolderBase]: For 141092/141092 co-relation queries the response was YES. [2024-06-21 21:21:21,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7240 conditions, 1155 events. 606/1155 cut-off events. For 141092/141092 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 6244 event pairs, 132 based on Foata normal form. 2/1156 useless extension candidates. Maximal degree in co-relation 7119. Up to 715 conditions per place. [2024-06-21 21:21:21,188 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 125 selfloop transitions, 88 changer transitions 0/215 dead transitions. [2024-06-21 21:21:21,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 215 transitions, 2407 flow [2024-06-21 21:21:21,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:21,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:21,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-21 21:21:21,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38387096774193546 [2024-06-21 21:21:21,189 INFO L175 Difference]: Start difference. First operand has 263 places, 199 transitions, 1906 flow. Second operand 10 states and 119 transitions. [2024-06-21 21:21:21,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 215 transitions, 2407 flow [2024-06-21 21:21:21,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 215 transitions, 2174 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 21:21:21,630 INFO L231 Difference]: Finished difference. Result has 265 places, 200 transitions, 1890 flow [2024-06-21 21:21:21,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1675, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1890, PETRI_PLACES=265, PETRI_TRANSITIONS=200} [2024-06-21 21:21:21,630 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 235 predicate places. [2024-06-21 21:21:21,630 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 200 transitions, 1890 flow [2024-06-21 21:21:21,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:21,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:21,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:21,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 21:21:21,631 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:21,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:21,632 INFO L85 PathProgramCache]: Analyzing trace with hash 228199262, now seen corresponding path program 3 times [2024-06-21 21:21:21,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:21,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988207211] [2024-06-21 21:21:21,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:21,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:21,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:22,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:22,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:22,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988207211] [2024-06-21 21:21:22,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988207211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:22,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:22,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:21:22,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587621127] [2024-06-21 21:21:22,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:22,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:21:22,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:22,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:21:22,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:21:22,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:22,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 200 transitions, 1890 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 21:21:22,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:22,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:22,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:22,706 INFO L124 PetriNetUnfolderBase]: 622/1191 cut-off events. [2024-06-21 21:21:22,706 INFO L125 PetriNetUnfolderBase]: For 181017/181017 co-relation queries the response was YES. [2024-06-21 21:21:22,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7287 conditions, 1191 events. 622/1191 cut-off events. For 181017/181017 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 6505 event pairs, 146 based on Foata normal form. 10/1200 useless extension candidates. Maximal degree in co-relation 7165. Up to 760 conditions per place. [2024-06-21 21:21:22,717 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 136 selfloop transitions, 71 changer transitions 10/219 dead transitions. [2024-06-21 21:21:22,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 219 transitions, 2390 flow [2024-06-21 21:21:22,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:22,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:22,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-21 21:21:22,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38387096774193546 [2024-06-21 21:21:22,718 INFO L175 Difference]: Start difference. First operand has 265 places, 200 transitions, 1890 flow. Second operand 10 states and 119 transitions. [2024-06-21 21:21:22,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 219 transitions, 2390 flow [2024-06-21 21:21:23,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 219 transitions, 2186 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 21:21:23,181 INFO L231 Difference]: Finished difference. Result has 267 places, 195 transitions, 1793 flow [2024-06-21 21:21:23,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1686, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1793, PETRI_PLACES=267, PETRI_TRANSITIONS=195} [2024-06-21 21:21:23,182 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 237 predicate places. [2024-06-21 21:21:23,182 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 195 transitions, 1793 flow [2024-06-21 21:21:23,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 21:21:23,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:23,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:23,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 21:21:23,182 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:23,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:23,183 INFO L85 PathProgramCache]: Analyzing trace with hash 429547982, now seen corresponding path program 4 times [2024-06-21 21:21:23,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:23,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951653628] [2024-06-21 21:21:23,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:23,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:23,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:23,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:23,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:23,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951653628] [2024-06-21 21:21:23,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951653628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:23,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:23,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:21:23,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768087739] [2024-06-21 21:21:23,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:23,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:21:23,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:23,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:21:23,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:21:23,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:23,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 195 transitions, 1793 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 21:21:23,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:23,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:23,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:24,086 INFO L124 PetriNetUnfolderBase]: 608/1177 cut-off events. [2024-06-21 21:21:24,087 INFO L125 PetriNetUnfolderBase]: For 193914/193914 co-relation queries the response was YES. [2024-06-21 21:21:24,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7194 conditions, 1177 events. 608/1177 cut-off events. For 193914/193914 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6474 event pairs, 146 based on Foata normal form. 12/1188 useless extension candidates. Maximal degree in co-relation 7071. Up to 725 conditions per place. [2024-06-21 21:21:24,097 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 132 selfloop transitions, 74 changer transitions 7/215 dead transitions. [2024-06-21 21:21:24,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 215 transitions, 2320 flow [2024-06-21 21:21:24,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:24,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:24,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2024-06-21 21:21:24,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3903225806451613 [2024-06-21 21:21:24,098 INFO L175 Difference]: Start difference. First operand has 267 places, 195 transitions, 1793 flow. Second operand 10 states and 121 transitions. [2024-06-21 21:21:24,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 215 transitions, 2320 flow [2024-06-21 21:21:24,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 215 transitions, 2168 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-06-21 21:21:24,473 INFO L231 Difference]: Finished difference. Result has 265 places, 193 transitions, 1810 flow [2024-06-21 21:21:24,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1641, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1810, PETRI_PLACES=265, PETRI_TRANSITIONS=193} [2024-06-21 21:21:24,473 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 235 predicate places. [2024-06-21 21:21:24,473 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 193 transitions, 1810 flow [2024-06-21 21:21:24,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 21:21:24,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:24,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:24,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 21:21:24,474 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:24,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:24,474 INFO L85 PathProgramCache]: Analyzing trace with hash 421928926, now seen corresponding path program 20 times [2024-06-21 21:21:24,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:24,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243688941] [2024-06-21 21:21:24,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:24,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:24,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:25,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:25,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:25,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243688941] [2024-06-21 21:21:25,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243688941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:25,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:25,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:21:25,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599288262] [2024-06-21 21:21:25,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:25,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:21:25,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:25,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:21:25,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:21:25,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:25,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 193 transitions, 1810 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:25,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:25,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:25,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:25,687 INFO L124 PetriNetUnfolderBase]: 588/1137 cut-off events. [2024-06-21 21:21:25,688 INFO L125 PetriNetUnfolderBase]: For 147004/147004 co-relation queries the response was YES. [2024-06-21 21:21:25,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7131 conditions, 1137 events. 588/1137 cut-off events. For 147004/147004 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 6213 event pairs, 144 based on Foata normal form. 2/1138 useless extension candidates. Maximal degree in co-relation 7009. Up to 733 conditions per place. [2024-06-21 21:21:25,697 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 134 selfloop transitions, 73 changer transitions 0/209 dead transitions. [2024-06-21 21:21:25,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 209 transitions, 2303 flow [2024-06-21 21:21:25,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:25,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:25,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2024-06-21 21:21:25,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741935483870968 [2024-06-21 21:21:25,698 INFO L175 Difference]: Start difference. First operand has 265 places, 193 transitions, 1810 flow. Second operand 10 states and 116 transitions. [2024-06-21 21:21:25,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 209 transitions, 2303 flow [2024-06-21 21:21:26,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 209 transitions, 2118 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-21 21:21:26,233 INFO L231 Difference]: Finished difference. Result has 266 places, 194 transitions, 1814 flow [2024-06-21 21:21:26,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1625, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1814, PETRI_PLACES=266, PETRI_TRANSITIONS=194} [2024-06-21 21:21:26,233 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 236 predicate places. [2024-06-21 21:21:26,243 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 194 transitions, 1814 flow [2024-06-21 21:21:26,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:26,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:26,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:26,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 21:21:26,244 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:26,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:26,244 INFO L85 PathProgramCache]: Analyzing trace with hash 421923346, now seen corresponding path program 21 times [2024-06-21 21:21:26,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:26,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678516319] [2024-06-21 21:21:26,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:26,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:26,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:27,016 INFO 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 21:21:27,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:27,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678516319] [2024-06-21 21:21:27,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678516319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:27,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:27,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:21:27,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109300848] [2024-06-21 21:21:27,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:27,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:21:27,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:27,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:21:27,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:21:27,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:27,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 194 transitions, 1814 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:27,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:27,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:27,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:27,424 INFO L124 PetriNetUnfolderBase]: 592/1145 cut-off events. [2024-06-21 21:21:27,425 INFO L125 PetriNetUnfolderBase]: For 150176/150176 co-relation queries the response was YES. [2024-06-21 21:21:27,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7182 conditions, 1145 events. 592/1145 cut-off events. For 150176/150176 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 6292 event pairs, 144 based on Foata normal form. 2/1146 useless extension candidates. Maximal degree in co-relation 7059. Up to 721 conditions per place. [2024-06-21 21:21:27,435 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 133 selfloop transitions, 75 changer transitions 0/210 dead transitions. [2024-06-21 21:21:27,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 210 transitions, 2309 flow [2024-06-21 21:21:27,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:27,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:27,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-21 21:21:27,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3774193548387097 [2024-06-21 21:21:27,436 INFO L175 Difference]: Start difference. First operand has 266 places, 194 transitions, 1814 flow. Second operand 10 states and 117 transitions. [2024-06-21 21:21:27,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 210 transitions, 2309 flow [2024-06-21 21:21:27,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 210 transitions, 2131 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-21 21:21:27,954 INFO L231 Difference]: Finished difference. Result has 268 places, 195 transitions, 1831 flow [2024-06-21 21:21:27,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1636, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1831, PETRI_PLACES=268, PETRI_TRANSITIONS=195} [2024-06-21 21:21:27,955 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 238 predicate places. [2024-06-21 21:21:27,955 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 195 transitions, 1831 flow [2024-06-21 21:21:27,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:27,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:27,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:27,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 21:21:27,955 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:27,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:27,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1608653278, now seen corresponding path program 5 times [2024-06-21 21:21:27,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:27,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550213188] [2024-06-21 21:21:27,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:27,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:27,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:28,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:28,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:28,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550213188] [2024-06-21 21:21:28,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550213188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:28,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:28,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:21:28,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087022248] [2024-06-21 21:21:28,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:28,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:21:28,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:28,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:21:28,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:21:28,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:28,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 195 transitions, 1831 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:28,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:28,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:28,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:28,968 INFO L124 PetriNetUnfolderBase]: 619/1206 cut-off events. [2024-06-21 21:21:28,969 INFO L125 PetriNetUnfolderBase]: For 212326/212326 co-relation queries the response was YES. [2024-06-21 21:21:28,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7921 conditions, 1206 events. 619/1206 cut-off events. For 212326/212326 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 6701 event pairs, 139 based on Foata normal form. 8/1213 useless extension candidates. Maximal degree in co-relation 7797. Up to 628 conditions per place. [2024-06-21 21:21:28,979 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 118 selfloop transitions, 89 changer transitions 11/220 dead transitions. [2024-06-21 21:21:28,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 220 transitions, 2545 flow [2024-06-21 21:21:28,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:21:28,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:21:28,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 137 transitions. [2024-06-21 21:21:28,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3682795698924731 [2024-06-21 21:21:28,980 INFO L175 Difference]: Start difference. First operand has 268 places, 195 transitions, 1831 flow. Second operand 12 states and 137 transitions. [2024-06-21 21:21:28,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 220 transitions, 2545 flow [2024-06-21 21:21:29,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 220 transitions, 2361 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 21:21:29,582 INFO L231 Difference]: Finished difference. Result has 272 places, 191 transitions, 1803 flow [2024-06-21 21:21:29,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1647, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1803, PETRI_PLACES=272, PETRI_TRANSITIONS=191} [2024-06-21 21:21:29,583 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 242 predicate places. [2024-06-21 21:21:29,583 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 191 transitions, 1803 flow [2024-06-21 21:21:29,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:29,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:29,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:29,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 21:21:29,584 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:29,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:29,584 INFO L85 PathProgramCache]: Analyzing trace with hash 429557282, now seen corresponding path program 6 times [2024-06-21 21:21:29,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:29,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186879699] [2024-06-21 21:21:29,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:29,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:29,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:30,041 INFO 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 21:21:30,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:30,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186879699] [2024-06-21 21:21:30,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186879699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:30,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:30,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:21:30,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030119483] [2024-06-21 21:21:30,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:30,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:21:30,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:30,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:21:30,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:21:30,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:30,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 191 transitions, 1803 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 21:21:30,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:30,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:30,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:30,376 INFO L124 PetriNetUnfolderBase]: 620/1209 cut-off events. [2024-06-21 21:21:30,376 INFO L125 PetriNetUnfolderBase]: For 246329/246329 co-relation queries the response was YES. [2024-06-21 21:21:30,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8528 conditions, 1209 events. 620/1209 cut-off events. For 246329/246329 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 6682 event pairs, 162 based on Foata normal form. 8/1216 useless extension candidates. Maximal degree in co-relation 8403. Up to 716 conditions per place. [2024-06-21 21:21:30,388 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 132 selfloop transitions, 70 changer transitions 8/212 dead transitions. [2024-06-21 21:21:30,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 212 transitions, 2493 flow [2024-06-21 21:21:30,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:30,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:30,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-21 21:21:30,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38387096774193546 [2024-06-21 21:21:30,389 INFO L175 Difference]: Start difference. First operand has 272 places, 191 transitions, 1803 flow. Second operand 10 states and 119 transitions. [2024-06-21 21:21:30,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 212 transitions, 2493 flow [2024-06-21 21:21:31,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 212 transitions, 2310 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-21 21:21:31,075 INFO L231 Difference]: Finished difference. Result has 266 places, 188 transitions, 1749 flow [2024-06-21 21:21:31,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1626, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1749, PETRI_PLACES=266, PETRI_TRANSITIONS=188} [2024-06-21 21:21:31,075 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 236 predicate places. [2024-06-21 21:21:31,075 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 188 transitions, 1749 flow [2024-06-21 21:21:31,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 21:21:31,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:31,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:31,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 21:21:31,076 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:31,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:31,076 INFO L85 PathProgramCache]: Analyzing trace with hash 2113134814, now seen corresponding path program 22 times [2024-06-21 21:21:31,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:31,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454227864] [2024-06-21 21:21:31,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:31,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:31,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:31,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:31,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:31,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454227864] [2024-06-21 21:21:31,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454227864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:31,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:31,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:21:31,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487839661] [2024-06-21 21:21:31,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:31,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:21:31,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:31,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:21:31,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:21:31,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:31,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 188 transitions, 1749 flow. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 21:21:31,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:31,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:31,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:32,075 INFO L124 PetriNetUnfolderBase]: 592/1153 cut-off events. [2024-06-21 21:21:32,075 INFO L125 PetriNetUnfolderBase]: For 208349/208349 co-relation queries the response was YES. [2024-06-21 21:21:32,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7310 conditions, 1153 events. 592/1153 cut-off events. For 208349/208349 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 6304 event pairs, 133 based on Foata normal form. 12/1164 useless extension candidates. Maximal degree in co-relation 7187. Up to 716 conditions per place. [2024-06-21 21:21:32,084 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 118 selfloop transitions, 83 changer transitions 7/210 dead transitions. [2024-06-21 21:21:32,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 210 transitions, 2278 flow [2024-06-21 21:21:32,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:21:32,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:21:32,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-21 21:21:32,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724340175953079 [2024-06-21 21:21:32,085 INFO L175 Difference]: Start difference. First operand has 266 places, 188 transitions, 1749 flow. Second operand 11 states and 127 transitions. [2024-06-21 21:21:32,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 210 transitions, 2278 flow [2024-06-21 21:21:32,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 210 transitions, 2135 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 21:21:32,546 INFO L231 Difference]: Finished difference. Result has 264 places, 186 transitions, 1799 flow [2024-06-21 21:21:32,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1606, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1799, PETRI_PLACES=264, PETRI_TRANSITIONS=186} [2024-06-21 21:21:32,547 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 234 predicate places. [2024-06-21 21:21:32,547 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 186 transitions, 1799 flow [2024-06-21 21:21:32,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 21:21:32,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:32,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:32,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 21:21:32,547 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:32,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:32,548 INFO L85 PathProgramCache]: Analyzing trace with hash 2113142750, now seen corresponding path program 7 times [2024-06-21 21:21:32,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:32,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354090034] [2024-06-21 21:21:32,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:32,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:32,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:33,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:33,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:33,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354090034] [2024-06-21 21:21:33,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354090034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:33,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:33,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:21:33,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702247184] [2024-06-21 21:21:33,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:33,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:21:33,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:33,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:21:33,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:21:33,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:33,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 186 transitions, 1799 flow. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 21:21:33,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:33,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:33,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:33,511 INFO L124 PetriNetUnfolderBase]: 584/1141 cut-off events. [2024-06-21 21:21:33,512 INFO L125 PetriNetUnfolderBase]: For 190943/190943 co-relation queries the response was YES. [2024-06-21 21:21:33,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7262 conditions, 1141 events. 584/1141 cut-off events. For 190943/190943 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6234 event pairs, 139 based on Foata normal form. 10/1150 useless extension candidates. Maximal degree in co-relation 7141. Up to 706 conditions per place. [2024-06-21 21:21:33,521 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 114 selfloop transitions, 77 changer transitions 16/209 dead transitions. [2024-06-21 21:21:33,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 209 transitions, 2291 flow [2024-06-21 21:21:33,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:21:33,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:21:33,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 135 transitions. [2024-06-21 21:21:33,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3629032258064516 [2024-06-21 21:21:33,522 INFO L175 Difference]: Start difference. First operand has 264 places, 186 transitions, 1799 flow. Second operand 12 states and 135 transitions. [2024-06-21 21:21:33,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 209 transitions, 2291 flow [2024-06-21 21:21:33,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 209 transitions, 2027 flow, removed 20 selfloop flow, removed 11 redundant places. [2024-06-21 21:21:33,990 INFO L231 Difference]: Finished difference. Result has 265 places, 180 transitions, 1654 flow [2024-06-21 21:21:33,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1535, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1654, PETRI_PLACES=265, PETRI_TRANSITIONS=180} [2024-06-21 21:21:33,991 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 235 predicate places. [2024-06-21 21:21:33,991 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 180 transitions, 1654 flow [2024-06-21 21:21:33,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 21:21:33,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:33,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:33,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 21:21:33,991 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:33,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:33,992 INFO L85 PathProgramCache]: Analyzing trace with hash 2113411520, now seen corresponding path program 8 times [2024-06-21 21:21:33,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:33,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872481235] [2024-06-21 21:21:33,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:33,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:33,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:34,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:34,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:34,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872481235] [2024-06-21 21:21:34,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872481235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:34,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:34,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:21:34,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798631008] [2024-06-21 21:21:34,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:34,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:21:34,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:34,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:21:34,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:21:34,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:34,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 180 transitions, 1654 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:34,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:34,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:34,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:34,940 INFO L124 PetriNetUnfolderBase]: 584/1149 cut-off events. [2024-06-21 21:21:34,940 INFO L125 PetriNetUnfolderBase]: For 222658/222658 co-relation queries the response was YES. [2024-06-21 21:21:34,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8037 conditions, 1149 events. 584/1149 cut-off events. For 222658/222658 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 6280 event pairs, 143 based on Foata normal form. 8/1156 useless extension candidates. Maximal degree in co-relation 7915. Up to 662 conditions per place. [2024-06-21 21:21:34,950 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 118 selfloop transitions, 75 changer transitions 9/204 dead transitions. [2024-06-21 21:21:34,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 204 transitions, 2369 flow [2024-06-21 21:21:34,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:21:34,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:21:34,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 125 transitions. [2024-06-21 21:21:34,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36656891495601174 [2024-06-21 21:21:34,951 INFO L175 Difference]: Start difference. First operand has 265 places, 180 transitions, 1654 flow. Second operand 11 states and 125 transitions. [2024-06-21 21:21:34,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 204 transitions, 2369 flow [2024-06-21 21:21:35,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 204 transitions, 2148 flow, removed 12 selfloop flow, removed 13 redundant places. [2024-06-21 21:21:35,388 INFO L231 Difference]: Finished difference. Result has 257 places, 176 transitions, 1575 flow [2024-06-21 21:21:35,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1445, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1575, PETRI_PLACES=257, PETRI_TRANSITIONS=176} [2024-06-21 21:21:35,388 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 227 predicate places. [2024-06-21 21:21:35,388 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 176 transitions, 1575 flow [2024-06-21 21:21:35,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:35,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:35,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:35,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 21:21:35,389 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:35,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:35,389 INFO L85 PathProgramCache]: Analyzing trace with hash 2105783164, now seen corresponding path program 23 times [2024-06-21 21:21:35,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:35,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494906999] [2024-06-21 21:21:35,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:35,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:35,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:36,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:36,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:36,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494906999] [2024-06-21 21:21:36,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494906999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:36,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:36,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:21:36,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232766842] [2024-06-21 21:21:36,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:36,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:21:36,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:36,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:21:36,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:21:36,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:36,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 176 transitions, 1575 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:36,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:36,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:36,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:36,404 INFO L124 PetriNetUnfolderBase]: 561/1100 cut-off events. [2024-06-21 21:21:36,405 INFO L125 PetriNetUnfolderBase]: For 173432/173432 co-relation queries the response was YES. [2024-06-21 21:21:36,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7440 conditions, 1100 events. 561/1100 cut-off events. For 173432/173432 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 5924 event pairs, 142 based on Foata normal form. 2/1101 useless extension candidates. Maximal degree in co-relation 7322. Up to 731 conditions per place. [2024-06-21 21:21:36,414 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 113 selfloop transitions, 79 changer transitions 0/194 dead transitions. [2024-06-21 21:21:36,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 194 transitions, 2046 flow [2024-06-21 21:21:36,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:21:36,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:21:36,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 119 transitions. [2024-06-21 21:21:36,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3489736070381232 [2024-06-21 21:21:36,415 INFO L175 Difference]: Start difference. First operand has 257 places, 176 transitions, 1575 flow. Second operand 11 states and 119 transitions. [2024-06-21 21:21:36,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 194 transitions, 2046 flow [2024-06-21 21:21:36,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 194 transitions, 1891 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-21 21:21:36,868 INFO L231 Difference]: Finished difference. Result has 252 places, 177 transitions, 1623 flow [2024-06-21 21:21:36,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1420, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1623, PETRI_PLACES=252, PETRI_TRANSITIONS=177} [2024-06-21 21:21:36,869 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 222 predicate places. [2024-06-21 21:21:36,869 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 177 transitions, 1623 flow [2024-06-21 21:21:36,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:36,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:36,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:36,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 21:21:36,869 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:36,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:36,871 INFO L85 PathProgramCache]: Analyzing trace with hash 313767610, now seen corresponding path program 24 times [2024-06-21 21:21:36,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:36,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327262654] [2024-06-21 21:21:36,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:36,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:36,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:37,675 INFO 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 21:21:37,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:37,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327262654] [2024-06-21 21:21:37,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327262654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:37,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:37,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:21:37,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438932198] [2024-06-21 21:21:37,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:37,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:21:37,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:37,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:21:37,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:21:37,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:37,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 177 transitions, 1623 flow. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 21:21:37,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:37,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:37,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:38,105 INFO L124 PetriNetUnfolderBase]: 558/1095 cut-off events. [2024-06-21 21:21:38,105 INFO L125 PetriNetUnfolderBase]: For 154544/154544 co-relation queries the response was YES. [2024-06-21 21:21:38,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7127 conditions, 1095 events. 558/1095 cut-off events. For 154544/154544 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 5922 event pairs, 136 based on Foata normal form. 2/1096 useless extension candidates. Maximal degree in co-relation 7012. Up to 706 conditions per place. [2024-06-21 21:21:38,113 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 109 selfloop transitions, 84 changer transitions 0/195 dead transitions. [2024-06-21 21:21:38,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 195 transitions, 2060 flow [2024-06-21 21:21:38,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:21:38,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:21:38,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 129 transitions. [2024-06-21 21:21:38,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3467741935483871 [2024-06-21 21:21:38,116 INFO L175 Difference]: Start difference. First operand has 252 places, 177 transitions, 1623 flow. Second operand 12 states and 129 transitions. [2024-06-21 21:21:38,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 195 transitions, 2060 flow [2024-06-21 21:21:38,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 195 transitions, 1844 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-21 21:21:38,443 INFO L231 Difference]: Finished difference. Result has 255 places, 177 transitions, 1579 flow [2024-06-21 21:21:38,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1407, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1579, PETRI_PLACES=255, PETRI_TRANSITIONS=177} [2024-06-21 21:21:38,443 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 225 predicate places. [2024-06-21 21:21:38,443 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 177 transitions, 1579 flow [2024-06-21 21:21:38,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 21:21:38,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:38,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:38,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 21:21:38,444 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:38,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:38,447 INFO L85 PathProgramCache]: Analyzing trace with hash -163970532, now seen corresponding path program 9 times [2024-06-21 21:21:38,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:38,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248384418] [2024-06-21 21:21:38,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:38,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:38,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:39,209 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 21:21:39,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:39,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248384418] [2024-06-21 21:21:39,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248384418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:39,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:39,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:21:39,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581440974] [2024-06-21 21:21:39,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:39,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:21:39,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:39,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:21:39,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:21:39,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:39,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 177 transitions, 1579 flow. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 21:21:39,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:39,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:39,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:39,624 INFO L124 PetriNetUnfolderBase]: 545/1072 cut-off events. [2024-06-21 21:21:39,624 INFO L125 PetriNetUnfolderBase]: For 147840/147840 co-relation queries the response was YES. [2024-06-21 21:21:39,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6070 conditions, 1072 events. 545/1072 cut-off events. For 147840/147840 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 5789 event pairs, 132 based on Foata normal form. 10/1081 useless extension candidates. Maximal degree in co-relation 5954. Up to 657 conditions per place. [2024-06-21 21:21:39,633 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 106 selfloop transitions, 73 changer transitions 16/197 dead transitions. [2024-06-21 21:21:39,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 197 transitions, 2027 flow [2024-06-21 21:21:39,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:21:39,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:21:39,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 127 transitions. [2024-06-21 21:21:39,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34139784946236557 [2024-06-21 21:21:39,634 INFO L175 Difference]: Start difference. First operand has 255 places, 177 transitions, 1579 flow. Second operand 12 states and 127 transitions. [2024-06-21 21:21:39,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 197 transitions, 2027 flow [2024-06-21 21:21:39,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 197 transitions, 1775 flow, removed 7 selfloop flow, removed 12 redundant places. [2024-06-21 21:21:39,905 INFO L231 Difference]: Finished difference. Result has 255 places, 170 transitions, 1433 flow [2024-06-21 21:21:39,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1433, PETRI_PLACES=255, PETRI_TRANSITIONS=170} [2024-06-21 21:21:39,905 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 225 predicate places. [2024-06-21 21:21:39,905 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 170 transitions, 1433 flow [2024-06-21 21:21:39,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 21:21:39,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:39,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:39,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 21:21:39,906 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:39,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:39,906 INFO L85 PathProgramCache]: Analyzing trace with hash -727079443, now seen corresponding path program 1 times [2024-06-21 21:21:39,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:39,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382678819] [2024-06-21 21:21:39,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:39,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:39,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:40,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:40,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:40,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382678819] [2024-06-21 21:21:40,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382678819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:40,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:40,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:21:40,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734311146] [2024-06-21 21:21:40,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:40,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:21:40,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:40,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:21:40,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:21:40,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:40,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 170 transitions, 1433 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:40,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:40,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:40,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:40,943 INFO L124 PetriNetUnfolderBase]: 517/1024 cut-off events. [2024-06-21 21:21:40,943 INFO L125 PetriNetUnfolderBase]: For 133370/133370 co-relation queries the response was YES. [2024-06-21 21:21:40,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5751 conditions, 1024 events. 517/1024 cut-off events. For 133370/133370 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5462 event pairs, 140 based on Foata normal form. 6/1029 useless extension candidates. Maximal degree in co-relation 5634. Up to 886 conditions per place. [2024-06-21 21:21:40,952 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 148 selfloop transitions, 11 changer transitions 26/187 dead transitions. [2024-06-21 21:21:40,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 187 transitions, 1843 flow [2024-06-21 21:21:40,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:40,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:40,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 98 transitions. [2024-06-21 21:21:40,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3161290322580645 [2024-06-21 21:21:40,953 INFO L175 Difference]: Start difference. First operand has 255 places, 170 transitions, 1433 flow. Second operand 10 states and 98 transitions. [2024-06-21 21:21:40,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 187 transitions, 1843 flow [2024-06-21 21:21:41,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 187 transitions, 1641 flow, removed 8 selfloop flow, removed 13 redundant places. [2024-06-21 21:21:41,283 INFO L231 Difference]: Finished difference. Result has 245 places, 160 transitions, 1191 flow [2024-06-21 21:21:41,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1233, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1191, PETRI_PLACES=245, PETRI_TRANSITIONS=160} [2024-06-21 21:21:41,283 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 215 predicate places. [2024-06-21 21:21:41,283 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 160 transitions, 1191 flow [2024-06-21 21:21:41,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:21:41,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:41,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:41,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 21:21:41,284 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:41,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:41,284 INFO L85 PathProgramCache]: Analyzing trace with hash -623987321, now seen corresponding path program 2 times [2024-06-21 21:21:41,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:41,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261085303] [2024-06-21 21:21:41,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:41,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:41,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:42,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:42,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:42,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261085303] [2024-06-21 21:21:42,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261085303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:42,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:42,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:21:42,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447744250] [2024-06-21 21:21:42,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:42,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:21:42,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:42,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:21:42,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:21:42,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:42,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 160 transitions, 1191 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 21:21:42,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:42,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:42,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:42,465 INFO L124 PetriNetUnfolderBase]: 483/964 cut-off events. [2024-06-21 21:21:42,465 INFO L125 PetriNetUnfolderBase]: For 119432/119432 co-relation queries the response was YES. [2024-06-21 21:21:42,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5177 conditions, 964 events. 483/964 cut-off events. For 119432/119432 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5105 event pairs, 113 based on Foata normal form. 6/969 useless extension candidates. Maximal degree in co-relation 5064. Up to 708 conditions per place. [2024-06-21 21:21:42,472 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 125 selfloop transitions, 34 changer transitions 17/178 dead transitions. [2024-06-21 21:21:42,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 178 transitions, 1587 flow [2024-06-21 21:21:42,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:21:42,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:21:42,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 109 transitions. [2024-06-21 21:21:42,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3196480938416422 [2024-06-21 21:21:42,473 INFO L175 Difference]: Start difference. First operand has 245 places, 160 transitions, 1191 flow. Second operand 11 states and 109 transitions. [2024-06-21 21:21:42,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 178 transitions, 1587 flow [2024-06-21 21:21:42,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 178 transitions, 1545 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-21 21:21:42,653 INFO L231 Difference]: Finished difference. Result has 234 places, 151 transitions, 1156 flow [2024-06-21 21:21:42,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1149, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1156, PETRI_PLACES=234, PETRI_TRANSITIONS=151} [2024-06-21 21:21:42,653 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 204 predicate places. [2024-06-21 21:21:42,653 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 151 transitions, 1156 flow [2024-06-21 21:21:42,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 21:21:42,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:42,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:42,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 21:21:42,654 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:42,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:42,654 INFO L85 PathProgramCache]: Analyzing trace with hash -426258997, now seen corresponding path program 3 times [2024-06-21 21:21:42,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:42,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244709030] [2024-06-21 21:21:42,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:42,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:42,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:43,501 INFO 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 21:21:43,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:43,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244709030] [2024-06-21 21:21:43,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244709030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:43,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:43,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:21:43,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853091940] [2024-06-21 21:21:43,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:43,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:21:43,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:43,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:21:43,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:21:43,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:43,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 151 transitions, 1156 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 21:21:43,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:43,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:43,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:43,899 INFO L124 PetriNetUnfolderBase]: 455/916 cut-off events. [2024-06-21 21:21:43,900 INFO L125 PetriNetUnfolderBase]: For 106443/106443 co-relation queries the response was YES. [2024-06-21 21:21:43,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4956 conditions, 916 events. 455/916 cut-off events. For 106443/106443 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4803 event pairs, 100 based on Foata normal form. 6/921 useless extension candidates. Maximal degree in co-relation 4850. Up to 648 conditions per place. [2024-06-21 21:21:43,906 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 123 selfloop transitions, 22 changer transitions 22/169 dead transitions. [2024-06-21 21:21:43,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 169 transitions, 1532 flow [2024-06-21 21:21:43,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:21:43,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:21:43,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 109 transitions. [2024-06-21 21:21:43,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3196480938416422 [2024-06-21 21:21:43,907 INFO L175 Difference]: Start difference. First operand has 234 places, 151 transitions, 1156 flow. Second operand 11 states and 109 transitions. [2024-06-21 21:21:43,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 169 transitions, 1532 flow [2024-06-21 21:21:44,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 169 transitions, 1448 flow, removed 5 selfloop flow, removed 13 redundant places. [2024-06-21 21:21:44,076 INFO L231 Difference]: Finished difference. Result has 225 places, 139 transitions, 1038 flow [2024-06-21 21:21:44,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1072, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1038, PETRI_PLACES=225, PETRI_TRANSITIONS=139} [2024-06-21 21:21:44,076 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 195 predicate places. [2024-06-21 21:21:44,076 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 139 transitions, 1038 flow [2024-06-21 21:21:44,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 21:21:44,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:44,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:44,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 21:21:44,077 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:44,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:44,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1923139667, now seen corresponding path program 4 times [2024-06-21 21:21:44,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:44,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844107221] [2024-06-21 21:21:44,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:44,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:44,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:44,945 INFO 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 21:21:44,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:44,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844107221] [2024-06-21 21:21:44,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844107221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:44,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:44,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:21:44,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458608016] [2024-06-21 21:21:44,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:44,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:21:44,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:44,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:21:44,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:21:45,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:45,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 139 transitions, 1038 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 21:21:45,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:45,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:45,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:45,306 INFO L124 PetriNetUnfolderBase]: 419/856 cut-off events. [2024-06-21 21:21:45,306 INFO L125 PetriNetUnfolderBase]: For 96579/96579 co-relation queries the response was YES. [2024-06-21 21:21:45,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4626 conditions, 856 events. 419/856 cut-off events. For 96579/96579 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4459 event pairs, 104 based on Foata normal form. 6/861 useless extension candidates. Maximal degree in co-relation 4524. Up to 644 conditions per place. [2024-06-21 21:21:45,313 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 117 selfloop transitions, 25 changer transitions 13/157 dead transitions. [2024-06-21 21:21:45,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 157 transitions, 1394 flow [2024-06-21 21:21:45,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:21:45,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:21:45,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 106 transitions. [2024-06-21 21:21:45,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31085043988269795 [2024-06-21 21:21:45,314 INFO L175 Difference]: Start difference. First operand has 225 places, 139 transitions, 1038 flow. Second operand 11 states and 106 transitions. [2024-06-21 21:21:45,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 157 transitions, 1394 flow [2024-06-21 21:21:45,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 157 transitions, 1336 flow, removed 7 selfloop flow, removed 13 redundant places. [2024-06-21 21:21:45,482 INFO L231 Difference]: Finished difference. Result has 213 places, 132 transitions, 985 flow [2024-06-21 21:21:45,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=980, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=985, PETRI_PLACES=213, PETRI_TRANSITIONS=132} [2024-06-21 21:21:45,483 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 183 predicate places. [2024-06-21 21:21:45,483 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 132 transitions, 985 flow [2024-06-21 21:21:45,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 21:21:45,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:45,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:45,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 21:21:45,483 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:45,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:45,484 INFO L85 PathProgramCache]: Analyzing trace with hash 219134477, now seen corresponding path program 5 times [2024-06-21 21:21:45,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:45,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844898318] [2024-06-21 21:21:45,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:45,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:45,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:46,379 INFO 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 21:21:46,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:46,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844898318] [2024-06-21 21:21:46,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844898318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:46,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:46,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:21:46,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284402538] [2024-06-21 21:21:46,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:46,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:21:46,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:46,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:21:46,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:21:46,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:46,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 132 transitions, 985 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 21:21:46,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:46,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:46,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:46,733 INFO L124 PetriNetUnfolderBase]: 399/824 cut-off events. [2024-06-21 21:21:46,733 INFO L125 PetriNetUnfolderBase]: For 82631/82631 co-relation queries the response was YES. [2024-06-21 21:21:46,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4394 conditions, 824 events. 399/824 cut-off events. For 82631/82631 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4286 event pairs, 106 based on Foata normal form. 6/829 useless extension candidates. Maximal degree in co-relation 4298. Up to 640 conditions per place. [2024-06-21 21:21:46,738 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 100 selfloop transitions, 5 changer transitions 43/150 dead transitions. [2024-06-21 21:21:46,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 150 transitions, 1329 flow [2024-06-21 21:21:46,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:21:46,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:21:46,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 104 transitions. [2024-06-21 21:21:46,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30498533724340177 [2024-06-21 21:21:46,739 INFO L175 Difference]: Start difference. First operand has 213 places, 132 transitions, 985 flow. Second operand 11 states and 104 transitions. [2024-06-21 21:21:46,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 150 transitions, 1329 flow [2024-06-21 21:21:46,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 150 transitions, 1273 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 21:21:46,892 INFO L231 Difference]: Finished difference. Result has 208 places, 106 transitions, 696 flow [2024-06-21 21:21:46,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=929, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=696, PETRI_PLACES=208, PETRI_TRANSITIONS=106} [2024-06-21 21:21:46,892 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 178 predicate places. [2024-06-21 21:21:46,892 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 106 transitions, 696 flow [2024-06-21 21:21:46,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 21:21:46,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:46,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:46,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 21:21:46,893 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:46,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:46,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1279513727, now seen corresponding path program 6 times [2024-06-21 21:21:46,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:46,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390530626] [2024-06-21 21:21:46,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:46,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:46,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:47,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:47,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:47,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390530626] [2024-06-21 21:21:47,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390530626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:47,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:47,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:21:47,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352833438] [2024-06-21 21:21:47,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:47,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:21:47,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:47,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:21:47,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:21:47,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:47,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 106 transitions, 696 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 21:21:47,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:47,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:47,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:48,119 INFO L124 PetriNetUnfolderBase]: 332/681 cut-off events. [2024-06-21 21:21:48,119 INFO L125 PetriNetUnfolderBase]: For 77760/77760 co-relation queries the response was YES. [2024-06-21 21:21:48,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3697 conditions, 681 events. 332/681 cut-off events. For 77760/77760 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3357 event pairs, 91 based on Foata normal form. 6/686 useless extension candidates. Maximal degree in co-relation 3615. Up to 435 conditions per place. [2024-06-21 21:21:48,124 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 69 selfloop transitions, 40 changer transitions 11/122 dead transitions. [2024-06-21 21:21:48,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 122 transitions, 978 flow [2024-06-21 21:21:48,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:21:48,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:21:48,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 109 transitions. [2024-06-21 21:21:48,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3196480938416422 [2024-06-21 21:21:48,125 INFO L175 Difference]: Start difference. First operand has 208 places, 106 transitions, 696 flow. Second operand 11 states and 109 transitions. [2024-06-21 21:21:48,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 122 transitions, 978 flow [2024-06-21 21:21:48,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 122 transitions, 922 flow, removed 12 selfloop flow, removed 16 redundant places. [2024-06-21 21:21:48,225 INFO L231 Difference]: Finished difference. Result has 178 places, 103 transitions, 714 flow [2024-06-21 21:21:48,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=648, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=714, PETRI_PLACES=178, PETRI_TRANSITIONS=103} [2024-06-21 21:21:48,225 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 148 predicate places. [2024-06-21 21:21:48,226 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 103 transitions, 714 flow [2024-06-21 21:21:48,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 21:21:48,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:48,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:48,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 21:21:48,226 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:48,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:48,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1051612577, now seen corresponding path program 7 times [2024-06-21 21:21:48,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:48,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407325790] [2024-06-21 21:21:48,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:48,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:48,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:49,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:49,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:49,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407325790] [2024-06-21 21:21:49,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407325790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:49,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:49,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:21:49,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629056601] [2024-06-21 21:21:49,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:49,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:21:49,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:49,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:21:49,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:21:49,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:49,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 103 transitions, 714 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 21:21:49,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:49,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:49,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:49,483 INFO L124 PetriNetUnfolderBase]: 324/665 cut-off events. [2024-06-21 21:21:49,484 INFO L125 PetriNetUnfolderBase]: For 65375/65375 co-relation queries the response was YES. [2024-06-21 21:21:49,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3535 conditions, 665 events. 324/665 cut-off events. For 65375/65375 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3246 event pairs, 91 based on Foata normal form. 6/670 useless extension candidates. Maximal degree in co-relation 3460. Up to 425 conditions per place. [2024-06-21 21:21:49,488 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 70 selfloop transitions, 36 changer transitions 11/119 dead transitions. [2024-06-21 21:21:49,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 119 transitions, 982 flow [2024-06-21 21:21:49,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:21:49,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:21:49,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 108 transitions. [2024-06-21 21:21:49,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31671554252199413 [2024-06-21 21:21:49,489 INFO L175 Difference]: Start difference. First operand has 178 places, 103 transitions, 714 flow. Second operand 11 states and 108 transitions. [2024-06-21 21:21:49,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 119 transitions, 982 flow [2024-06-21 21:21:49,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 119 transitions, 896 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 21:21:49,584 INFO L231 Difference]: Finished difference. Result has 174 places, 100 transitions, 688 flow [2024-06-21 21:21:49,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=688, PETRI_PLACES=174, PETRI_TRANSITIONS=100} [2024-06-21 21:21:49,584 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 144 predicate places. [2024-06-21 21:21:49,584 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 100 transitions, 688 flow [2024-06-21 21:21:49,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 21:21:49,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:49,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:49,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 21:21:49,585 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:49,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:49,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1493432187, now seen corresponding path program 8 times [2024-06-21 21:21:49,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:49,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185147188] [2024-06-21 21:21:49,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:49,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:49,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:50,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:50,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:50,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185147188] [2024-06-21 21:21:50,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185147188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:50,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:50,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:21:50,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606293893] [2024-06-21 21:21:50,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:50,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:21:50,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:50,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:21:50,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:21:50,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:50,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 100 transitions, 688 flow. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 21:21:50,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:50,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:50,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:50,687 INFO L124 PetriNetUnfolderBase]: 314/647 cut-off events. [2024-06-21 21:21:50,687 INFO L125 PetriNetUnfolderBase]: For 61553/61553 co-relation queries the response was YES. [2024-06-21 21:21:50,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3419 conditions, 647 events. 314/647 cut-off events. For 61553/61553 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3147 event pairs, 83 based on Foata normal form. 6/652 useless extension candidates. Maximal degree in co-relation 3346. Up to 359 conditions per place. [2024-06-21 21:21:50,691 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 62 selfloop transitions, 34 changer transitions 16/114 dead transitions. [2024-06-21 21:21:50,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 114 transitions, 942 flow [2024-06-21 21:21:50,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:50,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:50,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 100 transitions. [2024-06-21 21:21:50,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3225806451612903 [2024-06-21 21:21:50,692 INFO L175 Difference]: Start difference. First operand has 174 places, 100 transitions, 688 flow. Second operand 10 states and 100 transitions. [2024-06-21 21:21:50,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 114 transitions, 942 flow [2024-06-21 21:21:50,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 114 transitions, 864 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 21:21:50,769 INFO L231 Difference]: Finished difference. Result has 169 places, 90 transitions, 635 flow [2024-06-21 21:21:50,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=635, PETRI_PLACES=169, PETRI_TRANSITIONS=90} [2024-06-21 21:21:50,769 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 139 predicate places. [2024-06-21 21:21:50,770 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 90 transitions, 635 flow [2024-06-21 21:21:50,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 21:21:50,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:50,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:50,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 21:21:50,770 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:50,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:50,770 INFO L85 PathProgramCache]: Analyzing trace with hash -389783027, now seen corresponding path program 9 times [2024-06-21 21:21:50,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:50,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286080227] [2024-06-21 21:21:50,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:50,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:50,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:51,598 INFO 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 21:21:51,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:51,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286080227] [2024-06-21 21:21:51,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286080227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:51,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:51,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:21:51,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423753336] [2024-06-21 21:21:51,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:51,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:21:51,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:51,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:21:51,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:21:51,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:51,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 90 transitions, 635 flow. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 21:21:51,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:51,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:51,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:52,054 INFO L124 PetriNetUnfolderBase]: 267/554 cut-off events. [2024-06-21 21:21:52,054 INFO L125 PetriNetUnfolderBase]: For 46233/46233 co-relation queries the response was YES. [2024-06-21 21:21:52,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2765 conditions, 554 events. 267/554 cut-off events. For 46233/46233 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2545 event pairs, 72 based on Foata normal form. 6/559 useless extension candidates. Maximal degree in co-relation 2694. Up to 318 conditions per place. [2024-06-21 21:21:52,059 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 57 selfloop transitions, 29 changer transitions 16/104 dead transitions. [2024-06-21 21:21:52,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 104 transitions, 869 flow [2024-06-21 21:21:52,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:52,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:52,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 98 transitions. [2024-06-21 21:21:52,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3161290322580645 [2024-06-21 21:21:52,060 INFO L175 Difference]: Start difference. First operand has 169 places, 90 transitions, 635 flow. Second operand 10 states and 98 transitions. [2024-06-21 21:21:52,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 104 transitions, 869 flow [2024-06-21 21:21:52,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 104 transitions, 785 flow, removed 8 selfloop flow, removed 15 redundant places. [2024-06-21 21:21:52,123 INFO L231 Difference]: Finished difference. Result has 155 places, 82 transitions, 573 flow [2024-06-21 21:21:52,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=573, PETRI_PLACES=155, PETRI_TRANSITIONS=82} [2024-06-21 21:21:52,124 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 125 predicate places. [2024-06-21 21:21:52,124 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 82 transitions, 573 flow [2024-06-21 21:21:52,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 21:21:52,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:52,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:52,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 21:21:52,125 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:52,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:52,125 INFO L85 PathProgramCache]: Analyzing trace with hash -394424657, now seen corresponding path program 10 times [2024-06-21 21:21:52,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:52,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909054632] [2024-06-21 21:21:52,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:52,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:52,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:52,832 INFO 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 21:21:52,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:52,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909054632] [2024-06-21 21:21:52,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909054632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:52,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:52,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:21:52,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988100481] [2024-06-21 21:21:52,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:52,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:21:52,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:52,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:21:52,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:21:52,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:52,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 82 transitions, 573 flow. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 21:21:52,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:52,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:52,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:53,069 INFO L124 PetriNetUnfolderBase]: 239/502 cut-off events. [2024-06-21 21:21:53,069 INFO L125 PetriNetUnfolderBase]: For 36395/36395 co-relation queries the response was YES. [2024-06-21 21:21:53,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2476 conditions, 502 events. 239/502 cut-off events. For 36395/36395 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2237 event pairs, 64 based on Foata normal form. 6/507 useless extension candidates. Maximal degree in co-relation 2412. Up to 266 conditions per place. [2024-06-21 21:21:53,071 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 49 selfloop transitions, 19 changer transitions 26/96 dead transitions. [2024-06-21 21:21:53,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 96 transitions, 791 flow [2024-06-21 21:21:53,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:53,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:53,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 97 transitions. [2024-06-21 21:21:53,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31290322580645163 [2024-06-21 21:21:53,073 INFO L175 Difference]: Start difference. First operand has 155 places, 82 transitions, 573 flow. Second operand 10 states and 97 transitions. [2024-06-21 21:21:53,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 96 transitions, 791 flow [2024-06-21 21:21:53,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 96 transitions, 719 flow, removed 7 selfloop flow, removed 14 redundant places. [2024-06-21 21:21:53,116 INFO L231 Difference]: Finished difference. Result has 143 places, 67 transitions, 463 flow [2024-06-21 21:21:53,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=501, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=463, PETRI_PLACES=143, PETRI_TRANSITIONS=67} [2024-06-21 21:21:53,116 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 113 predicate places. [2024-06-21 21:21:53,117 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 67 transitions, 463 flow [2024-06-21 21:21:53,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 21:21:53,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:53,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:53,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 21:21:53,117 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:53,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:53,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1032974315, now seen corresponding path program 11 times [2024-06-21 21:21:53,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:53,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424200226] [2024-06-21 21:21:53,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:53,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:53,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:53,832 INFO 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 21:21:53,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:53,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424200226] [2024-06-21 21:21:53,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424200226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:53,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:53,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:21:53,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346513765] [2024-06-21 21:21:53,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:53,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:21:53,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:53,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:21:53,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:21:53,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:53,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 67 transitions, 463 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 21:21:53,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:53,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:53,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:54,023 INFO L124 PetriNetUnfolderBase]: 190/415 cut-off events. [2024-06-21 21:21:54,024 INFO L125 PetriNetUnfolderBase]: For 28853/28853 co-relation queries the response was YES. [2024-06-21 21:21:54,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2082 conditions, 415 events. 190/415 cut-off events. For 28853/28853 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1782 event pairs, 31 based on Foata normal form. 6/420 useless extension candidates. Maximal degree in co-relation 2024. Up to 132 conditions per place. [2024-06-21 21:21:54,025 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 31 selfloop transitions, 24 changer transitions 25/82 dead transitions. [2024-06-21 21:21:54,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 82 transitions, 655 flow [2024-06-21 21:21:54,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:21:54,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:21:54,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 100 transitions. [2024-06-21 21:21:54,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2932551319648094 [2024-06-21 21:21:54,026 INFO L175 Difference]: Start difference. First operand has 143 places, 67 transitions, 463 flow. Second operand 11 states and 100 transitions. [2024-06-21 21:21:54,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 82 transitions, 655 flow [2024-06-21 21:21:54,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 82 transitions, 586 flow, removed 9 selfloop flow, removed 15 redundant places. [2024-06-21 21:21:54,067 INFO L231 Difference]: Finished difference. Result has 127 places, 52 transitions, 353 flow [2024-06-21 21:21:54,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=353, PETRI_PLACES=127, PETRI_TRANSITIONS=52} [2024-06-21 21:21:54,067 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 97 predicate places. [2024-06-21 21:21:54,067 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 52 transitions, 353 flow [2024-06-21 21:21:54,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 21:21:54,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:54,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:54,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 21:21:54,068 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:54,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:54,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1688492057, now seen corresponding path program 12 times [2024-06-21 21:21:54,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:54,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510575960] [2024-06-21 21:21:54,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:54,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:54,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:54,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:54,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:54,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510575960] [2024-06-21 21:21:54,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510575960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:54,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:54,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:21:54,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896907232] [2024-06-21 21:21:54,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:54,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:21:54,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:54,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:21:54,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:21:55,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:55,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 52 transitions, 353 flow. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 21:21:55,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:55,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:55,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:55,242 INFO L124 PetriNetUnfolderBase]: 137/296 cut-off events. [2024-06-21 21:21:55,243 INFO L125 PetriNetUnfolderBase]: For 15125/15125 co-relation queries the response was YES. [2024-06-21 21:21:55,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1367 conditions, 296 events. 137/296 cut-off events. For 15125/15125 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1159 event pairs, 36 based on Foata normal form. 6/302 useless extension candidates. Maximal degree in co-relation 1317. Up to 157 conditions per place. [2024-06-21 21:21:55,244 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 32 selfloop transitions, 13 changer transitions 18/65 dead transitions. [2024-06-21 21:21:55,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 65 transitions, 507 flow [2024-06-21 21:21:55,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:21:55,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:21:55,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 93 transitions. [2024-06-21 21:21:55,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3 [2024-06-21 21:21:55,245 INFO L175 Difference]: Start difference. First operand has 127 places, 52 transitions, 353 flow. Second operand 10 states and 93 transitions. [2024-06-21 21:21:55,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 65 transitions, 507 flow [2024-06-21 21:21:55,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 65 transitions, 426 flow, removed 10 selfloop flow, removed 21 redundant places. [2024-06-21 21:21:55,256 INFO L231 Difference]: Finished difference. Result has 101 places, 42 transitions, 253 flow [2024-06-21 21:21:55,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=253, PETRI_PLACES=101, PETRI_TRANSITIONS=42} [2024-06-21 21:21:55,256 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 71 predicate places. [2024-06-21 21:21:55,256 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 42 transitions, 253 flow [2024-06-21 21:21:55,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 21:21:55,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:55,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:55,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 21:21:55,257 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:55,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:55,257 INFO L85 PathProgramCache]: Analyzing trace with hash 185739239, now seen corresponding path program 13 times [2024-06-21 21:21:55,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:55,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196151872] [2024-06-21 21:21:55,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:55,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:55,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:56,104 INFO 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 21:21:56,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:56,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196151872] [2024-06-21 21:21:56,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196151872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:56,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:56,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 21:21:56,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313916535] [2024-06-21 21:21:56,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:56,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 21:21:56,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:56,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 21:21:56,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-06-21 21:21:56,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:56,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 42 transitions, 253 flow. Second operand has 14 states, 14 states have (on average 6.214285714285714) internal successors, (87), 14 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 21:21:56,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:56,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:56,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:56,326 INFO L124 PetriNetUnfolderBase]: 93/208 cut-off events. [2024-06-21 21:21:56,326 INFO L125 PetriNetUnfolderBase]: For 6534/6534 co-relation queries the response was YES. [2024-06-21 21:21:56,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 792 conditions, 208 events. 93/208 cut-off events. For 6534/6534 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 700 event pairs, 25 based on Foata normal form. 6/214 useless extension candidates. Maximal degree in co-relation 752. Up to 114 conditions per place. [2024-06-21 21:21:56,327 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 28 selfloop transitions, 11 changer transitions 15/56 dead transitions. [2024-06-21 21:21:56,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 56 transitions, 391 flow [2024-06-21 21:21:56,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:21:56,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:21:56,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 103 transitions. [2024-06-21 21:21:56,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2768817204301075 [2024-06-21 21:21:56,328 INFO L175 Difference]: Start difference. First operand has 101 places, 42 transitions, 253 flow. Second operand 12 states and 103 transitions. [2024-06-21 21:21:56,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 56 transitions, 391 flow [2024-06-21 21:21:56,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 56 transitions, 349 flow, removed 8 selfloop flow, removed 14 redundant places. [2024-06-21 21:21:56,333 INFO L231 Difference]: Finished difference. Result has 88 places, 37 transitions, 210 flow [2024-06-21 21:21:56,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=210, PETRI_PLACES=88, PETRI_TRANSITIONS=37} [2024-06-21 21:21:56,333 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 58 predicate places. [2024-06-21 21:21:56,333 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 37 transitions, 210 flow [2024-06-21 21:21:56,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.214285714285714) internal successors, (87), 14 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 21:21:56,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:56,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:56,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 21:21:56,334 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:56,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:56,334 INFO L85 PathProgramCache]: Analyzing trace with hash 194723157, now seen corresponding path program 14 times [2024-06-21 21:21:56,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:56,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227069993] [2024-06-21 21:21:56,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:56,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:56,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:57,162 INFO 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 21:21:57,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:57,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227069993] [2024-06-21 21:21:57,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227069993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:57,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:57,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:21:57,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542492125] [2024-06-21 21:21:57,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:57,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:21:57,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:57,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:21:57,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:21:57,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:57,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 37 transitions, 210 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 21:21:57,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:57,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:57,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:57,371 INFO L124 PetriNetUnfolderBase]: 83/186 cut-off events. [2024-06-21 21:21:57,371 INFO L125 PetriNetUnfolderBase]: For 4048/4048 co-relation queries the response was YES. [2024-06-21 21:21:57,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 673 conditions, 186 events. 83/186 cut-off events. For 4048/4048 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 580 event pairs, 21 based on Foata normal form. 6/192 useless extension candidates. Maximal degree in co-relation 640. Up to 96 conditions per place. [2024-06-21 21:21:57,372 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 26 selfloop transitions, 9 changer transitions 15/52 dead transitions. [2024-06-21 21:21:57,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 52 transitions, 342 flow [2024-06-21 21:21:57,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:21:57,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:21:57,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 98 transitions. [2024-06-21 21:21:57,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2873900293255132 [2024-06-21 21:21:57,373 INFO L175 Difference]: Start difference. First operand has 88 places, 37 transitions, 210 flow. Second operand 11 states and 98 transitions. [2024-06-21 21:21:57,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 52 transitions, 342 flow [2024-06-21 21:21:57,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 52 transitions, 310 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-21 21:21:57,376 INFO L231 Difference]: Finished difference. Result has 77 places, 32 transitions, 176 flow [2024-06-21 21:21:57,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=176, PETRI_PLACES=77, PETRI_TRANSITIONS=32} [2024-06-21 21:21:57,377 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 47 predicate places. [2024-06-21 21:21:57,377 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 32 transitions, 176 flow [2024-06-21 21:21:57,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 21:21:57,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:57,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:57,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 21:21:57,377 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:57,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:57,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1688665037, now seen corresponding path program 15 times [2024-06-21 21:21:57,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:57,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268787150] [2024-06-21 21:21:57,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:57,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:57,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:58,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:58,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268787150] [2024-06-21 21:21:58,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268787150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:58,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:58,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:21:58,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798293527] [2024-06-21 21:21:58,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:58,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:21:58,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:58,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:21:58,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:21:58,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:58,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 32 transitions, 176 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 21:21:58,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:58,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:58,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:58,599 INFO L124 PetriNetUnfolderBase]: 70/159 cut-off events. [2024-06-21 21:21:58,600 INFO L125 PetriNetUnfolderBase]: For 2906/2906 co-relation queries the response was YES. [2024-06-21 21:21:58,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 571 conditions, 159 events. 70/159 cut-off events. For 2906/2906 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 456 event pairs, 19 based on Foata normal form. 6/165 useless extension candidates. Maximal degree in co-relation 542. Up to 78 conditions per place. [2024-06-21 21:21:58,600 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 21 selfloop transitions, 9 changer transitions 14/46 dead transitions. [2024-06-21 21:21:58,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 46 transitions, 294 flow [2024-06-21 21:21:58,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:21:58,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:21:58,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 95 transitions. [2024-06-21 21:21:58,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2785923753665689 [2024-06-21 21:21:58,608 INFO L175 Difference]: Start difference. First operand has 77 places, 32 transitions, 176 flow. Second operand 11 states and 95 transitions. [2024-06-21 21:21:58,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 46 transitions, 294 flow [2024-06-21 21:21:58,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 46 transitions, 266 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-21 21:21:58,611 INFO L231 Difference]: Finished difference. Result has 69 places, 28 transitions, 151 flow [2024-06-21 21:21:58,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=151, PETRI_PLACES=69, PETRI_TRANSITIONS=28} [2024-06-21 21:21:58,611 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 39 predicate places. [2024-06-21 21:21:58,611 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 28 transitions, 151 flow [2024-06-21 21:21:58,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 21:21:58,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:58,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:58,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 21:21:58,612 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:58,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:58,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1693133687, now seen corresponding path program 16 times [2024-06-21 21:21:58,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:58,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238203176] [2024-06-21 21:21:58,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:58,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:58,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:21:59,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:21:59,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:21:59,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238203176] [2024-06-21 21:21:59,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238203176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:21:59,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:21:59,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:21:59,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390838851] [2024-06-21 21:21:59,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:21:59,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:21:59,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:21:59,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:21:59,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:21:59,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:21:59,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 28 transitions, 151 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 21:21:59,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:21:59,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:21:59,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:21:59,730 INFO L124 PetriNetUnfolderBase]: 56/133 cut-off events. [2024-06-21 21:21:59,731 INFO L125 PetriNetUnfolderBase]: For 1942/1942 co-relation queries the response was YES. [2024-06-21 21:21:59,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473 conditions, 133 events. 56/133 cut-off events. For 1942/1942 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 341 event pairs, 6 based on Foata normal form. 6/139 useless extension candidates. Maximal degree in co-relation 448. Up to 38 conditions per place. [2024-06-21 21:21:59,731 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 18 selfloop transitions, 8 changer transitions 14/42 dead transitions. [2024-06-21 21:21:59,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 42 transitions, 261 flow [2024-06-21 21:21:59,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:21:59,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:21:59,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 98 transitions. [2024-06-21 21:21:59,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26344086021505375 [2024-06-21 21:21:59,732 INFO L175 Difference]: Start difference. First operand has 69 places, 28 transitions, 151 flow. Second operand 12 states and 98 transitions. [2024-06-21 21:21:59,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 42 transitions, 261 flow [2024-06-21 21:21:59,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 42 transitions, 235 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 21:21:59,734 INFO L231 Difference]: Finished difference. Result has 64 places, 22 transitions, 116 flow [2024-06-21 21:21:59,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=116, PETRI_PLACES=64, PETRI_TRANSITIONS=22} [2024-06-21 21:21:59,734 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 34 predicate places. [2024-06-21 21:21:59,734 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 22 transitions, 116 flow [2024-06-21 21:21:59,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 21:21:59,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:21:59,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:21:59,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 21:21:59,735 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:21:59,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:21:59,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1555383979, now seen corresponding path program 17 times [2024-06-21 21:21:59,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:21:59,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257465245] [2024-06-21 21:21:59,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:21:59,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:21:59,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:22:00,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:22:00,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:22:00,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257465245] [2024-06-21 21:22:00,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257465245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:22:00,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:22:00,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:22:00,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987334427] [2024-06-21 21:22:00,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:22:00,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:22:00,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:22:00,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:22:00,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:22:00,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 21:22:00,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 22 transitions, 116 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 21:22:00,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:22:00,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 21:22:00,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:22:00,927 INFO L124 PetriNetUnfolderBase]: 24/65 cut-off events. [2024-06-21 21:22:00,927 INFO L125 PetriNetUnfolderBase]: For 680/680 co-relation queries the response was YES. [2024-06-21 21:22:00,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 65 events. 24/65 cut-off events. For 680/680 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 90 event pairs, 0 based on Foata normal form. 6/71 useless extension candidates. Maximal degree in co-relation 175. Up to 24 conditions per place. [2024-06-21 21:22:00,927 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 0 selfloop transitions, 0 changer transitions 30/30 dead transitions. [2024-06-21 21:22:00,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 30 transitions, 158 flow [2024-06-21 21:22:00,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:22:00,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:22:00,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 84 transitions. [2024-06-21 21:22:00,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24633431085043989 [2024-06-21 21:22:00,928 INFO L175 Difference]: Start difference. First operand has 64 places, 22 transitions, 116 flow. Second operand 11 states and 84 transitions. [2024-06-21 21:22:00,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 30 transitions, 158 flow [2024-06-21 21:22:00,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 30 transitions, 122 flow, removed 1 selfloop flow, removed 18 redundant places. [2024-06-21 21:22:00,929 INFO L231 Difference]: Finished difference. Result has 47 places, 0 transitions, 0 flow [2024-06-21 21:22:00,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=0, PETRI_PLACES=47, PETRI_TRANSITIONS=0} [2024-06-21 21:22:00,929 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 17 predicate places. [2024-06-21 21:22:00,929 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 0 transitions, 0 flow [2024-06-21 21:22:00,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 21:22:00,932 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-21 21:22:00,932 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-21 21:22:00,933 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-21 21:22:00,936 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-21 21:22:00,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 21:22:00,937 INFO L445 BasicCegarLoop]: Path program histogram: [24, 17, 15, 11, 9, 7, 6, 6, 5, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:22:00,939 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-21 21:22:00,939 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-21 21:22:00,943 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-21 21:22:00,944 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-21 21:22:00,944 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.06 09:22:00 BasicIcfg [2024-06-21 21:22:00,944 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-21 21:22:00,945 INFO L158 Benchmark]: Toolchain (without parser) took 147959.26ms. Allocated memory was 172.0MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 105.4MB in the beginning and 1.1GB in the end (delta: -1.0GB). Peak memory consumption was 63.2MB. Max. memory is 16.1GB. [2024-06-21 21:22:00,945 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 172.0MB. Free memory is still 133.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 21:22:00,945 INFO L158 Benchmark]: Witness Parser took 0.13ms. Allocated memory is still 172.0MB. Free memory is still 110.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 21:22:00,945 INFO L158 Benchmark]: CACSL2BoogieTranslator took 538.34ms. Allocated memory is still 172.0MB. Free memory was 105.4MB in the beginning and 72.1MB in the end (delta: 33.3MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2024-06-21 21:22:00,946 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.39ms. Allocated memory is still 172.0MB. Free memory was 72.1MB in the beginning and 138.3MB in the end (delta: -66.2MB). Peak memory consumption was 10.7MB. Max. memory is 16.1GB. [2024-06-21 21:22:00,946 INFO L158 Benchmark]: Boogie Preprocessor took 84.62ms. Allocated memory was 172.0MB in the beginning and 230.7MB in the end (delta: 58.7MB). Free memory was 138.3MB in the beginning and 197.0MB in the end (delta: -58.7MB). Peak memory consumption was 8.9MB. Max. memory is 16.1GB. [2024-06-21 21:22:00,946 INFO L158 Benchmark]: RCFGBuilder took 578.08ms. Allocated memory is still 230.7MB. Free memory was 197.0MB in the beginning and 147.7MB in the end (delta: 49.3MB). Peak memory consumption was 50.3MB. Max. memory is 16.1GB. [2024-06-21 21:22:00,946 INFO L158 Benchmark]: TraceAbstraction took 146700.28ms. Allocated memory was 230.7MB in the beginning and 1.3GB in the end (delta: 1.0GB). Free memory was 147.7MB in the beginning and 1.1GB in the end (delta: -977.6MB). Peak memory consumption was 43.7MB. Max. memory is 16.1GB. [2024-06-21 21:22:00,947 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 172.0MB. Free memory is still 133.3MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.13ms. Allocated memory is still 172.0MB. Free memory is still 110.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 538.34ms. Allocated memory is still 172.0MB. Free memory was 105.4MB in the beginning and 72.1MB in the end (delta: 33.3MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 52.39ms. Allocated memory is still 172.0MB. Free memory was 72.1MB in the beginning and 138.3MB in the end (delta: -66.2MB). Peak memory consumption was 10.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 84.62ms. Allocated memory was 172.0MB in the beginning and 230.7MB in the end (delta: 58.7MB). Free memory was 138.3MB in the beginning and 197.0MB in the end (delta: -58.7MB). Peak memory consumption was 8.9MB. Max. memory is 16.1GB. * RCFGBuilder took 578.08ms. Allocated memory is still 230.7MB. Free memory was 197.0MB in the beginning and 147.7MB in the end (delta: 49.3MB). Peak memory consumption was 50.3MB. Max. memory is 16.1GB. * TraceAbstraction took 146700.28ms. Allocated memory was 230.7MB in the beginning and 1.3GB in the end (delta: 1.0GB). Free memory was 147.7MB in the beginning and 1.1GB in the end (delta: -977.6MB). Peak memory consumption was 43.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 803]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 804]: 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, 50 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: 146.6s, OverallIterations: 135, TraceHistogramMax: 1, PathProgramHistogramMax: 24, EmptinessCheckTime: 0.0s, AutomataDifference: 59.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7865 SdHoareTripleChecker+Valid, 23.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6623 mSDsluCounter, 7500 SdHoareTripleChecker+Invalid, 20.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6628 mSDsCounter, 1655 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 41440 IncrementalHoareTripleChecker+Invalid, 43095 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1655 mSolverCounterUnsat, 872 mSDtfsCounter, 41440 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1386 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1382 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3045 ImplicationChecksByTransitivity, 34.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2094occurred in iteration=65, InterpolantAutomatonStates: 1257, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 84.8s InterpolantComputationTime, 2193 NumberOfCodeBlocks, 2193 NumberOfCodeBlocksAsserted, 135 NumberOfCheckSat, 2058 ConstructedInterpolants, 0 QuantifiedInterpolants, 93329 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 135 InterpolantComputations, 135 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 21:22:00,975 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