./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe029_power.opt_pso.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe029_power.opt_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe029_power.opt_pso.opt_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe029_power.opt_pso.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-03 20:17:39,169 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 20:17:39,243 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 20:17:39,250 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 20:17:39,250 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 20:17:39,283 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 20:17:39,283 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 20:17:39,284 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 20:17:39,284 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 20:17:39,287 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 20:17:39,288 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 20:17:39,288 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 20:17:39,289 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 20:17:39,290 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 20:17:39,290 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 20:17:39,290 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 20:17:39,291 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 20:17:39,291 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 20:17:39,291 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 20:17:39,291 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 20:17:39,292 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 20:17:39,292 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 20:17:39,292 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 20:17:39,293 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 20:17:39,293 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 20:17:39,293 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 20:17:39,293 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 20:17:39,294 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 20:17:39,294 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 20:17:39,294 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 20:17:39,295 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 20:17:39,295 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 20:17:39,296 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:17:39,296 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 20:17:39,296 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 20:17:39,296 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 20:17:39,296 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 20:17:39,297 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 20:17:39,297 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 20:17:39,297 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 20:17:39,297 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 20:17:39,297 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 20:17:39,298 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 20:17:39,298 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 20:17:39,502 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 20:17:39,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 20:17:39,527 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 20:17:39,527 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 20:17:39,528 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 20:17:39,529 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe029_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-03 20:17:39,660 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 20:17:39,660 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 20:17:39,661 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe029_power.opt_pso.opt_rmo.opt.i [2024-06-03 20:17:40,701 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 20:17:40,968 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 20:17:40,969 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe029_power.opt_pso.opt_rmo.opt.i [2024-06-03 20:17:40,989 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a92e9c6c5/caf2b3f9654a4925a0a4de5962ee6912/FLAGc2213b4ec [2024-06-03 20:17:41,005 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a92e9c6c5/caf2b3f9654a4925a0a4de5962ee6912 [2024-06-03 20:17:41,005 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 20:17:41,006 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 20:17:41,008 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 20:17:41,008 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 20:17:41,012 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 20:17:41,013 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:17:39" (1/2) ... [2024-06-03 20:17:41,013 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ae1244a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:17:41, skipping insertion in model container [2024-06-03 20:17:41,013 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:17:39" (1/2) ... [2024-06-03 20:17:41,015 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@39ab42c7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:17:41, skipping insertion in model container [2024-06-03 20:17:41,015 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:17:41" (2/2) ... [2024-06-03 20:17:41,015 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ae1244a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:17:41, skipping insertion in model container [2024-06-03 20:17:41,015 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:17:41" (2/2) ... [2024-06-03 20:17:41,015 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 20:17:41,055 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 20:17:41,056 INFO L97 edCorrectnessWitness]: Location invariant before [L794-L794] ((((((((((((! multithreaded || x$r_buff0_thd1 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0) [2024-06-03 20:17:41,057 INFO L97 edCorrectnessWitness]: Location invariant before [L793-L793] ((((((((((((! multithreaded || x$r_buff0_thd1 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0) [2024-06-03 20:17:41,057 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 20:17:41,057 INFO L106 edCorrectnessWitness]: ghost_update [L791-L791] multithreaded = 1; [2024-06-03 20:17:41,094 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 20:17:41,472 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:17:41,483 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 20:17:41,571 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:17:41,607 INFO L206 MainTranslator]: Completed translation [2024-06-03 20:17:41,608 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:17:41 WrapperNode [2024-06-03 20:17:41,608 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 20:17:41,609 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 20:17:41,609 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 20:17:41,609 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 20:17:41,613 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:17:41" (1/1) ... [2024-06-03 20:17:41,624 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:17:41" (1/1) ... [2024-06-03 20:17:41,646 INFO L138 Inliner]: procedures = 174, calls = 34, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 130 [2024-06-03 20:17:41,646 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 20:17:41,647 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 20:17:41,647 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 20:17:41,647 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 20:17:41,655 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:17:41" (1/1) ... [2024-06-03 20:17:41,655 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:17:41" (1/1) ... [2024-06-03 20:17:41,657 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:17:41" (1/1) ... [2024-06-03 20:17:41,668 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]. [2024-06-03 20:17:41,668 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:17:41" (1/1) ... [2024-06-03 20:17:41,669 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:17:41" (1/1) ... [2024-06-03 20:17:41,674 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:17:41" (1/1) ... [2024-06-03 20:17:41,675 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:17:41" (1/1) ... [2024-06-03 20:17:41,676 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:17:41" (1/1) ... [2024-06-03 20:17:41,677 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:17:41" (1/1) ... [2024-06-03 20:17:41,680 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 20:17:41,680 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 20:17:41,680 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 20:17:41,680 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 20:17:41,681 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:17:41" (1/1) ... [2024-06-03 20:17:41,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:17:41,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 20:17:41,701 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) [2024-06-03 20:17:41,717 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 [2024-06-03 20:17:41,732 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 20:17:41,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 20:17:41,732 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 20:17:41,732 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 20:17:41,733 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 20:17:41,733 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 20:17:41,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 20:17:41,733 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 20:17:41,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 20:17:41,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 20:17:41,734 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 20:17:41,821 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 20:17:41,822 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 20:17:42,101 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 20:17:42,105 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 20:17:42,246 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 20:17:42,247 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 20:17:42,248 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:17:42 BoogieIcfgContainer [2024-06-03 20:17:42,249 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 20:17:42,251 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 20:17:42,251 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 20:17:42,253 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 20:17:42,253 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:17:39" (1/4) ... [2024-06-03 20:17:42,254 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ac45ff9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:17:42, skipping insertion in model container [2024-06-03 20:17:42,254 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 08:17:41" (2/4) ... [2024-06-03 20:17:42,254 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ac45ff9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 08:17:42, skipping insertion in model container [2024-06-03 20:17:42,254 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:17:41" (3/4) ... [2024-06-03 20:17:42,254 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ac45ff9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 08:17:42, skipping insertion in model container [2024-06-03 20:17:42,255 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:17:42" (4/4) ... [2024-06-03 20:17:42,255 INFO L112 eAbstractionObserver]: Analyzing ICFG safe029_power.opt_pso.opt_rmo.opt.i [2024-06-03 20:17:42,298 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 20:17:42,299 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-03 20:17:42,299 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 20:17:42,329 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 20:17:42,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 30 transitions, 68 flow [2024-06-03 20:17:42,375 INFO L124 PetriNetUnfolderBase]: 0/28 cut-off events. [2024-06-03 20:17:42,375 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:17:42,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 28 events. 0/28 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 38 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 20:17:42,377 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 30 transitions, 68 flow [2024-06-03 20:17:42,379 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 22 transitions, 50 flow [2024-06-03 20:17:42,385 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 20:17:42,393 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;@67544dfa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 20:17:42,393 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-03 20:17:42,396 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 20:17:42,396 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 20:17:42,396 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:17:42,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:42,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 20:17:42,397 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)] === [2024-06-03 20:17:42,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:42,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1322329521, now seen corresponding path program 1 times [2024-06-03 20:17:42,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:42,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129827548] [2024-06-03 20:17:42,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:42,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:42,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:43,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:43,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:43,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129827548] [2024-06-03 20:17:43,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129827548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:43,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:43,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 20:17:43,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78915082] [2024-06-03 20:17:43,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:43,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 20:17:43,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:43,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 20:17:43,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 20:17:43,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-03 20:17:43,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:43,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:43,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-03 20:17:43,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:43,325 INFO L124 PetriNetUnfolderBase]: 162/297 cut-off events. [2024-06-03 20:17:43,325 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-06-03 20:17:43,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 610 conditions, 297 events. 162/297 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1013 event pairs, 97 based on Foata normal form. 1/291 useless extension candidates. Maximal degree in co-relation 596. Up to 288 conditions per place. [2024-06-03 20:17:43,330 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 23 selfloop transitions, 3 changer transitions 0/28 dead transitions. [2024-06-03 20:17:43,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 28 transitions, 117 flow [2024-06-03 20:17:43,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 20:17:43,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 20:17:43,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 46 transitions. [2024-06-03 20:17:43,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2024-06-03 20:17:43,341 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 50 flow. Second operand 3 states and 46 transitions. [2024-06-03 20:17:43,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 28 transitions, 117 flow [2024-06-03 20:17:43,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 28 transitions, 114 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-03 20:17:43,345 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 69 flow [2024-06-03 20:17:43,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2024-06-03 20:17:43,349 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2024-06-03 20:17:43,349 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 69 flow [2024-06-03 20:17:43,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:43,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:43,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:43,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 20:17:43,353 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)] === [2024-06-03 20:17:43,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:43,355 INFO L85 PathProgramCache]: Analyzing trace with hash -551185454, now seen corresponding path program 1 times [2024-06-03 20:17:43,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:43,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450917555] [2024-06-03 20:17:43,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:43,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:43,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:43,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:43,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:43,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450917555] [2024-06-03 20:17:43,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450917555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:43,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:43,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 20:17:43,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972748097] [2024-06-03 20:17:43,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:43,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 20:17:43,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:43,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 20:17:43,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 20:17:43,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-03 20:17:43,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 69 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 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) [2024-06-03 20:17:43,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:43,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-03 20:17:43,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:44,049 INFO L124 PetriNetUnfolderBase]: 159/292 cut-off events. [2024-06-03 20:17:44,049 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2024-06-03 20:17:44,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 682 conditions, 292 events. 159/292 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 991 event pairs, 79 based on Foata normal form. 2/292 useless extension candidates. Maximal degree in co-relation 667. Up to 274 conditions per place. [2024-06-03 20:17:44,054 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 27 selfloop transitions, 5 changer transitions 0/34 dead transitions. [2024-06-03 20:17:44,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 34 transitions, 159 flow [2024-06-03 20:17:44,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:17:44,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:17:44,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 58 transitions. [2024-06-03 20:17:44,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-06-03 20:17:44,057 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 69 flow. Second operand 4 states and 58 transitions. [2024-06-03 20:17:44,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 34 transitions, 159 flow [2024-06-03 20:17:44,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 34 transitions, 156 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 20:17:44,060 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 93 flow [2024-06-03 20:17:44,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=93, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2024-06-03 20:17:44,061 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 4 predicate places. [2024-06-03 20:17:44,061 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 93 flow [2024-06-03 20:17:44,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 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) [2024-06-03 20:17:44,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:44,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:44,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 20:17:44,063 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)] === [2024-06-03 20:17:44,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:44,067 INFO L85 PathProgramCache]: Analyzing trace with hash 79715222, now seen corresponding path program 1 times [2024-06-03 20:17:44,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:44,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856082117] [2024-06-03 20:17:44,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:44,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:44,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:44,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:44,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:44,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856082117] [2024-06-03 20:17:44,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856082117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:44,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:44,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:17:44,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141008274] [2024-06-03 20:17:44,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:44,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:17:44,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:44,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:17:44,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:17:44,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-03 20:17:44,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 93 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:44,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:44,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-03 20:17:44,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:44,713 INFO L124 PetriNetUnfolderBase]: 153/282 cut-off events. [2024-06-03 20:17:44,713 INFO L125 PetriNetUnfolderBase]: For 171/171 co-relation queries the response was YES. [2024-06-03 20:17:44,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 731 conditions, 282 events. 153/282 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 940 event pairs, 43 based on Foata normal form. 4/284 useless extension candidates. Maximal degree in co-relation 714. Up to 246 conditions per place. [2024-06-03 20:17:44,715 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 32 selfloop transitions, 7 changer transitions 0/41 dead transitions. [2024-06-03 20:17:44,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 41 transitions, 211 flow [2024-06-03 20:17:44,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:17:44,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:17:44,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 71 transitions. [2024-06-03 20:17:44,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47333333333333333 [2024-06-03 20:17:44,719 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 93 flow. Second operand 5 states and 71 transitions. [2024-06-03 20:17:44,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 41 transitions, 211 flow [2024-06-03 20:17:44,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 41 transitions, 202 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-03 20:17:44,721 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 117 flow [2024-06-03 20:17:44,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=117, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2024-06-03 20:17:44,723 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 7 predicate places. [2024-06-03 20:17:44,723 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 117 flow [2024-06-03 20:17:44,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:44,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:44,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:44,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 20:17:44,724 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)] === [2024-06-03 20:17:44,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:44,724 INFO L85 PathProgramCache]: Analyzing trace with hash -703047979, now seen corresponding path program 1 times [2024-06-03 20:17:44,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:44,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090813777] [2024-06-03 20:17:44,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:44,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:44,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:45,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:45,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:45,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090813777] [2024-06-03 20:17:45,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090813777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:45,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:45,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:17:45,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869567766] [2024-06-03 20:17:45,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:45,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:17:45,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:45,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:17:45,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:17:45,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-03 20:17:45,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 117 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 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) [2024-06-03 20:17:45,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:45,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-03 20:17:45,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:45,797 INFO L124 PetriNetUnfolderBase]: 149/274 cut-off events. [2024-06-03 20:17:45,797 INFO L125 PetriNetUnfolderBase]: For 269/269 co-relation queries the response was YES. [2024-06-03 20:17:45,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 774 conditions, 274 events. 149/274 cut-off events. For 269/269 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 907 event pairs, 24 based on Foata normal form. 4/276 useless extension candidates. Maximal degree in co-relation 756. Up to 220 conditions per place. [2024-06-03 20:17:45,799 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 32 selfloop transitions, 8 changer transitions 0/42 dead transitions. [2024-06-03 20:17:45,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 42 transitions, 225 flow [2024-06-03 20:17:45,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:17:45,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:17:45,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 78 transitions. [2024-06-03 20:17:45,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-03 20:17:45,806 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 117 flow. Second operand 6 states and 78 transitions. [2024-06-03 20:17:45,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 42 transitions, 225 flow [2024-06-03 20:17:45,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 42 transitions, 210 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-03 20:17:45,808 INFO L231 Difference]: Finished difference. Result has 38 places, 27 transitions, 114 flow [2024-06-03 20:17:45,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=114, PETRI_PLACES=38, PETRI_TRANSITIONS=27} [2024-06-03 20:17:45,809 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 9 predicate places. [2024-06-03 20:17:45,809 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 27 transitions, 114 flow [2024-06-03 20:17:45,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 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) [2024-06-03 20:17:45,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:45,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:45,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 20:17:45,809 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)] === [2024-06-03 20:17:45,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:45,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1322578618, now seen corresponding path program 1 times [2024-06-03 20:17:45,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:45,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130301271] [2024-06-03 20:17:45,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:45,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:45,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:46,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:46,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:46,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130301271] [2024-06-03 20:17:46,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130301271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:46,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:46,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:17:46,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721173953] [2024-06-03 20:17:46,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:46,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:17:46,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:46,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:17:46,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:17:46,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:17:46,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 27 transitions, 114 flow. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:46,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:46,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:17:46,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:46,411 INFO L124 PetriNetUnfolderBase]: 147/271 cut-off events. [2024-06-03 20:17:46,411 INFO L125 PetriNetUnfolderBase]: For 377/377 co-relation queries the response was YES. [2024-06-03 20:17:46,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 799 conditions, 271 events. 147/271 cut-off events. For 377/377 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 886 event pairs, 53 based on Foata normal form. 1/270 useless extension candidates. Maximal degree in co-relation 780. Up to 259 conditions per place. [2024-06-03 20:17:46,413 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 26 selfloop transitions, 6 changer transitions 0/34 dead transitions. [2024-06-03 20:17:46,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 34 transitions, 196 flow [2024-06-03 20:17:46,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:17:46,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:17:46,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 54 transitions. [2024-06-03 20:17:46,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36 [2024-06-03 20:17:46,416 INFO L175 Difference]: Start difference. First operand has 38 places, 27 transitions, 114 flow. Second operand 5 states and 54 transitions. [2024-06-03 20:17:46,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 34 transitions, 196 flow [2024-06-03 20:17:46,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 34 transitions, 176 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-03 20:17:46,420 INFO L231 Difference]: Finished difference. Result has 39 places, 29 transitions, 121 flow [2024-06-03 20:17:46,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=121, PETRI_PLACES=39, PETRI_TRANSITIONS=29} [2024-06-03 20:17:46,425 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 10 predicate places. [2024-06-03 20:17:46,425 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 29 transitions, 121 flow [2024-06-03 20:17:46,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:46,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:46,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:46,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 20:17:46,427 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)] === [2024-06-03 20:17:46,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:46,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1949736420, now seen corresponding path program 1 times [2024-06-03 20:17:46,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:46,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34385615] [2024-06-03 20:17:46,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:46,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:46,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:46,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:46,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:46,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34385615] [2024-06-03 20:17:46,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34385615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:46,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:46,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:17:46,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854343579] [2024-06-03 20:17:46,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:46,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:17:46,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:46,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:17:46,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:17:46,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:17:46,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 29 transitions, 121 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:46,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:46,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:17:46,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:47,064 INFO L124 PetriNetUnfolderBase]: 149/276 cut-off events. [2024-06-03 20:17:47,064 INFO L125 PetriNetUnfolderBase]: For 498/501 co-relation queries the response was YES. [2024-06-03 20:17:47,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 843 conditions, 276 events. 149/276 cut-off events. For 498/501 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 922 event pairs, 52 based on Foata normal form. 4/277 useless extension candidates. Maximal degree in co-relation 822. Up to 237 conditions per place. [2024-06-03 20:17:47,066 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 28 selfloop transitions, 12 changer transitions 0/42 dead transitions. [2024-06-03 20:17:47,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 249 flow [2024-06-03 20:17:47,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:17:47,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:17:47,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 67 transitions. [2024-06-03 20:17:47,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37222222222222223 [2024-06-03 20:17:47,067 INFO L175 Difference]: Start difference. First operand has 39 places, 29 transitions, 121 flow. Second operand 6 states and 67 transitions. [2024-06-03 20:17:47,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 249 flow [2024-06-03 20:17:47,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 238 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-03 20:17:47,069 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 178 flow [2024-06-03 20:17:47,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=178, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2024-06-03 20:17:47,070 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 14 predicate places. [2024-06-03 20:17:47,070 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 178 flow [2024-06-03 20:17:47,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:47,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:47,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:47,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 20:17:47,071 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)] === [2024-06-03 20:17:47,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:47,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1382704549, now seen corresponding path program 1 times [2024-06-03 20:17:47,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:47,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417645950] [2024-06-03 20:17:47,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:47,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:47,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:47,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:47,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:47,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417645950] [2024-06-03 20:17:47,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417645950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:47,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:47,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:17:47,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685857049] [2024-06-03 20:17:47,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:47,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:17:47,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:47,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:17:47,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:17:47,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:17:47,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 178 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:47,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:47,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:17:47,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:47,689 INFO L124 PetriNetUnfolderBase]: 156/288 cut-off events. [2024-06-03 20:17:47,690 INFO L125 PetriNetUnfolderBase]: For 702/702 co-relation queries the response was YES. [2024-06-03 20:17:47,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1012 conditions, 288 events. 156/288 cut-off events. For 702/702 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 959 event pairs, 51 based on Foata normal form. 1/287 useless extension candidates. Maximal degree in co-relation 989. Up to 264 conditions per place. [2024-06-03 20:17:47,692 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 37 selfloop transitions, 11 changer transitions 0/50 dead transitions. [2024-06-03 20:17:47,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 50 transitions, 332 flow [2024-06-03 20:17:47,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:17:47,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:17:47,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 74 transitions. [2024-06-03 20:17:47,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3523809523809524 [2024-06-03 20:17:47,693 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 178 flow. Second operand 7 states and 74 transitions. [2024-06-03 20:17:47,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 50 transitions, 332 flow [2024-06-03 20:17:47,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 50 transitions, 318 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-03 20:17:47,695 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 233 flow [2024-06-03 20:17:47,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=233, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2024-06-03 20:17:47,696 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 20 predicate places. [2024-06-03 20:17:47,696 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 233 flow [2024-06-03 20:17:47,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:47,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:47,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:47,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 20:17:47,697 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)] === [2024-06-03 20:17:47,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:47,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1164690619, now seen corresponding path program 2 times [2024-06-03 20:17:47,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:47,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10643374] [2024-06-03 20:17:47,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:47,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:47,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:48,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:48,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:48,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10643374] [2024-06-03 20:17:48,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10643374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:48,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:48,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:17:48,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296421925] [2024-06-03 20:17:48,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:48,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:17:48,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:48,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:17:48,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:17:48,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:17:48,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 233 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:48,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:48,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:17:48,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:48,327 INFO L124 PetriNetUnfolderBase]: 159/293 cut-off events. [2024-06-03 20:17:48,328 INFO L125 PetriNetUnfolderBase]: For 952/952 co-relation queries the response was YES. [2024-06-03 20:17:48,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1112 conditions, 293 events. 159/293 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 982 event pairs, 50 based on Foata normal form. 1/292 useless extension candidates. Maximal degree in co-relation 1086. Up to 266 conditions per place. [2024-06-03 20:17:48,330 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 36 selfloop transitions, 12 changer transitions 0/50 dead transitions. [2024-06-03 20:17:48,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 50 transitions, 370 flow [2024-06-03 20:17:48,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:17:48,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:17:48,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 65 transitions. [2024-06-03 20:17:48,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3611111111111111 [2024-06-03 20:17:48,331 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 233 flow. Second operand 6 states and 65 transitions. [2024-06-03 20:17:48,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 50 transitions, 370 flow [2024-06-03 20:17:48,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 50 transitions, 349 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-03 20:17:48,334 INFO L231 Difference]: Finished difference. Result has 51 places, 42 transitions, 267 flow [2024-06-03 20:17:48,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=267, PETRI_PLACES=51, PETRI_TRANSITIONS=42} [2024-06-03 20:17:48,335 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 22 predicate places. [2024-06-03 20:17:48,335 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 42 transitions, 267 flow [2024-06-03 20:17:48,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:48,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:48,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:48,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 20:17:48,336 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)] === [2024-06-03 20:17:48,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:48,337 INFO L85 PathProgramCache]: Analyzing trace with hash 312279589, now seen corresponding path program 3 times [2024-06-03 20:17:48,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:48,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056579189] [2024-06-03 20:17:48,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:48,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:48,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:48,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:48,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:48,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056579189] [2024-06-03 20:17:48,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056579189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:48,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:48,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:17:48,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024690846] [2024-06-03 20:17:48,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:48,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:17:48,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:48,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:17:48,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:17:48,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:17:48,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 42 transitions, 267 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:48,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:48,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:17:48,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:48,925 INFO L124 PetriNetUnfolderBase]: 154/286 cut-off events. [2024-06-03 20:17:48,925 INFO L125 PetriNetUnfolderBase]: For 1202/1205 co-relation queries the response was YES. [2024-06-03 20:17:48,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1108 conditions, 286 events. 154/286 cut-off events. For 1202/1205 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 960 event pairs, 53 based on Foata normal form. 4/286 useless extension candidates. Maximal degree in co-relation 1081. Up to 239 conditions per place. [2024-06-03 20:17:48,927 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 30 selfloop transitions, 16 changer transitions 0/48 dead transitions. [2024-06-03 20:17:48,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 48 transitions, 375 flow [2024-06-03 20:17:48,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:17:48,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:17:48,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 66 transitions. [2024-06-03 20:17:48,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-03 20:17:48,929 INFO L175 Difference]: Start difference. First operand has 51 places, 42 transitions, 267 flow. Second operand 6 states and 66 transitions. [2024-06-03 20:17:48,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 48 transitions, 375 flow [2024-06-03 20:17:48,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 48 transitions, 345 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-03 20:17:48,931 INFO L231 Difference]: Finished difference. Result has 53 places, 42 transitions, 276 flow [2024-06-03 20:17:48,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=276, PETRI_PLACES=53, PETRI_TRANSITIONS=42} [2024-06-03 20:17:48,932 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 24 predicate places. [2024-06-03 20:17:48,932 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 42 transitions, 276 flow [2024-06-03 20:17:48,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:48,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:48,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:48,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 20:17:48,933 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)] === [2024-06-03 20:17:48,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:48,933 INFO L85 PathProgramCache]: Analyzing trace with hash 312287525, now seen corresponding path program 1 times [2024-06-03 20:17:48,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:48,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086894675] [2024-06-03 20:17:48,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:48,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:48,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:49,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:49,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:49,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086894675] [2024-06-03 20:17:49,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086894675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:49,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:49,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:17:49,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935586848] [2024-06-03 20:17:49,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:49,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:17:49,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:49,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:17:49,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:17:49,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:17:49,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 42 transitions, 276 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) [2024-06-03 20:17:49,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:49,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:17:49,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:49,755 INFO L124 PetriNetUnfolderBase]: 173/319 cut-off events. [2024-06-03 20:17:49,756 INFO L125 PetriNetUnfolderBase]: For 1243/1243 co-relation queries the response was YES. [2024-06-03 20:17:49,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1202 conditions, 319 events. 173/319 cut-off events. For 1243/1243 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1115 event pairs, 38 based on Foata normal form. 4/318 useless extension candidates. Maximal degree in co-relation 1174. Up to 192 conditions per place. [2024-06-03 20:17:49,757 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 39 selfloop transitions, 23 changer transitions 0/64 dead transitions. [2024-06-03 20:17:49,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 64 transitions, 504 flow [2024-06-03 20:17:49,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:17:49,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:17:49,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 85 transitions. [2024-06-03 20:17:49,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-03 20:17:49,759 INFO L175 Difference]: Start difference. First operand has 53 places, 42 transitions, 276 flow. Second operand 7 states and 85 transitions. [2024-06-03 20:17:49,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 64 transitions, 504 flow [2024-06-03 20:17:49,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 64 transitions, 459 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 20:17:49,763 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 352 flow [2024-06-03 20:17:49,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=352, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2024-06-03 20:17:49,764 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 27 predicate places. [2024-06-03 20:17:49,764 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 352 flow [2024-06-03 20:17:49,764 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) [2024-06-03 20:17:49,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:49,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:49,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 20:17:49,765 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)] === [2024-06-03 20:17:49,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:49,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1229324189, now seen corresponding path program 1 times [2024-06-03 20:17:49,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:49,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650399533] [2024-06-03 20:17:49,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:49,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:49,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:50,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:50,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:50,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650399533] [2024-06-03 20:17:50,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650399533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:50,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:50,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:17:50,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965356321] [2024-06-03 20:17:50,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:50,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:17:50,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:50,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:17:50,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:17:50,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:17:50,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 352 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) [2024-06-03 20:17:50,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:50,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:17:50,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:50,355 INFO L124 PetriNetUnfolderBase]: 183/335 cut-off events. [2024-06-03 20:17:50,356 INFO L125 PetriNetUnfolderBase]: For 1468/1468 co-relation queries the response was YES. [2024-06-03 20:17:50,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1415 conditions, 335 events. 183/335 cut-off events. For 1468/1468 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1178 event pairs, 33 based on Foata normal form. 2/335 useless extension candidates. Maximal degree in co-relation 1385. Up to 281 conditions per place. [2024-06-03 20:17:50,359 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 54 selfloop transitions, 17 changer transitions 0/73 dead transitions. [2024-06-03 20:17:50,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 73 transitions, 574 flow [2024-06-03 20:17:50,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:17:50,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:17:50,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2024-06-03 20:17:50,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3625 [2024-06-03 20:17:50,360 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 352 flow. Second operand 8 states and 87 transitions. [2024-06-03 20:17:50,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 73 transitions, 574 flow [2024-06-03 20:17:50,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 73 transitions, 550 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-03 20:17:50,367 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 423 flow [2024-06-03 20:17:50,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=423, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2024-06-03 20:17:50,367 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 35 predicate places. [2024-06-03 20:17:50,368 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 423 flow [2024-06-03 20:17:50,368 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) [2024-06-03 20:17:50,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:50,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:50,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 20:17:50,368 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)] === [2024-06-03 20:17:50,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:50,369 INFO L85 PathProgramCache]: Analyzing trace with hash -584554399, now seen corresponding path program 2 times [2024-06-03 20:17:50,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:50,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895500112] [2024-06-03 20:17:50,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:50,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:50,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:50,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:50,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:50,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895500112] [2024-06-03 20:17:50,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895500112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:50,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:50,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:17:50,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762424488] [2024-06-03 20:17:50,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:50,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:17:50,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:50,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:17:50,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:17:50,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:17:50,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 423 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) [2024-06-03 20:17:50,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:50,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:17:50,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:51,033 INFO L124 PetriNetUnfolderBase]: 189/345 cut-off events. [2024-06-03 20:17:51,034 INFO L125 PetriNetUnfolderBase]: For 1876/1876 co-relation queries the response was YES. [2024-06-03 20:17:51,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1605 conditions, 345 events. 189/345 cut-off events. For 1876/1876 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1212 event pairs, 32 based on Foata normal form. 2/345 useless extension candidates. Maximal degree in co-relation 1571. Up to 285 conditions per place. [2024-06-03 20:17:51,036 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 53 selfloop transitions, 18 changer transitions 0/73 dead transitions. [2024-06-03 20:17:51,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 73 transitions, 629 flow [2024-06-03 20:17:51,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:17:51,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:17:51,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2024-06-03 20:17:51,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37142857142857144 [2024-06-03 20:17:51,037 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 423 flow. Second operand 7 states and 78 transitions. [2024-06-03 20:17:51,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 73 transitions, 629 flow [2024-06-03 20:17:51,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 73 transitions, 607 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-03 20:17:51,042 INFO L231 Difference]: Finished difference. Result has 68 places, 60 transitions, 469 flow [2024-06-03 20:17:51,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=469, PETRI_PLACES=68, PETRI_TRANSITIONS=60} [2024-06-03 20:17:51,043 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 39 predicate places. [2024-06-03 20:17:51,043 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 60 transitions, 469 flow [2024-06-03 20:17:51,043 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) [2024-06-03 20:17:51,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:51,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:51,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 20:17:51,044 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)] === [2024-06-03 20:17:51,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:51,044 INFO L85 PathProgramCache]: Analyzing trace with hash 913601579, now seen corresponding path program 3 times [2024-06-03 20:17:51,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:51,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58535975] [2024-06-03 20:17:51,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:51,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:51,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:51,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:51,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:51,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58535975] [2024-06-03 20:17:51,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58535975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:51,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:51,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:17:51,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333391580] [2024-06-03 20:17:51,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:51,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:17:51,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:51,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:17:51,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:17:51,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:17:51,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 60 transitions, 469 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) [2024-06-03 20:17:51,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:51,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:17:51,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:51,732 INFO L124 PetriNetUnfolderBase]: 200/363 cut-off events. [2024-06-03 20:17:51,733 INFO L125 PetriNetUnfolderBase]: For 2422/2422 co-relation queries the response was YES. [2024-06-03 20:17:51,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1793 conditions, 363 events. 200/363 cut-off events. For 2422/2422 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1299 event pairs, 32 based on Foata normal form. 2/363 useless extension candidates. Maximal degree in co-relation 1758. Up to 285 conditions per place. [2024-06-03 20:17:51,735 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 53 selfloop transitions, 22 changer transitions 0/77 dead transitions. [2024-06-03 20:17:51,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 77 transitions, 735 flow [2024-06-03 20:17:51,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:17:51,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:17:51,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 79 transitions. [2024-06-03 20:17:51,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3761904761904762 [2024-06-03 20:17:51,736 INFO L175 Difference]: Start difference. First operand has 68 places, 60 transitions, 469 flow. Second operand 7 states and 79 transitions. [2024-06-03 20:17:51,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 77 transitions, 735 flow [2024-06-03 20:17:51,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 77 transitions, 683 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-03 20:17:51,741 INFO L231 Difference]: Finished difference. Result has 70 places, 64 transitions, 521 flow [2024-06-03 20:17:51,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=521, PETRI_PLACES=70, PETRI_TRANSITIONS=64} [2024-06-03 20:17:51,742 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 41 predicate places. [2024-06-03 20:17:51,742 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 64 transitions, 521 flow [2024-06-03 20:17:51,742 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) [2024-06-03 20:17:51,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:51,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:51,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 20:17:51,743 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)] === [2024-06-03 20:17:51,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:51,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1090733099, now seen corresponding path program 4 times [2024-06-03 20:17:51,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:51,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664163104] [2024-06-03 20:17:51,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:51,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:51,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:52,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:52,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:52,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664163104] [2024-06-03 20:17:52,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664163104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:52,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:52,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:17:52,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13539242] [2024-06-03 20:17:52,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:52,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:17:52,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:52,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:17:52,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:17:52,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:17:52,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 64 transitions, 521 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) [2024-06-03 20:17:52,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:52,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:17:52,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:52,390 INFO L124 PetriNetUnfolderBase]: 210/383 cut-off events. [2024-06-03 20:17:52,391 INFO L125 PetriNetUnfolderBase]: For 2702/2708 co-relation queries the response was YES. [2024-06-03 20:17:52,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1806 conditions, 383 events. 210/383 cut-off events. For 2702/2708 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1420 event pairs, 39 based on Foata normal form. 7/384 useless extension candidates. Maximal degree in co-relation 1770. Up to 193 conditions per place. [2024-06-03 20:17:52,393 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 50 selfloop transitions, 31 changer transitions 0/83 dead transitions. [2024-06-03 20:17:52,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 83 transitions, 807 flow [2024-06-03 20:17:52,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:17:52,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:17:52,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2024-06-03 20:17:52,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-03 20:17:52,394 INFO L175 Difference]: Start difference. First operand has 70 places, 64 transitions, 521 flow. Second operand 7 states and 87 transitions. [2024-06-03 20:17:52,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 83 transitions, 807 flow [2024-06-03 20:17:52,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 83 transitions, 785 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-03 20:17:52,399 INFO L231 Difference]: Finished difference. Result has 75 places, 71 transitions, 623 flow [2024-06-03 20:17:52,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=623, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2024-06-03 20:17:52,400 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 46 predicate places. [2024-06-03 20:17:52,400 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 623 flow [2024-06-03 20:17:52,400 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) [2024-06-03 20:17:52,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:52,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:52,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 20:17:52,400 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)] === [2024-06-03 20:17:52,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:52,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1090979363, now seen corresponding path program 1 times [2024-06-03 20:17:52,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:52,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807629464] [2024-06-03 20:17:52,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:52,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:52,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:53,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:53,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:53,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807629464] [2024-06-03 20:17:53,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807629464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:53,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:53,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:17:53,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656425026] [2024-06-03 20:17:53,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:53,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:17:53,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:53,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:17:53,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:17:53,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:17:53,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 623 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) [2024-06-03 20:17:53,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:53,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:17:53,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:53,331 INFO L124 PetriNetUnfolderBase]: 211/385 cut-off events. [2024-06-03 20:17:53,331 INFO L125 PetriNetUnfolderBase]: For 2783/2789 co-relation queries the response was YES. [2024-06-03 20:17:53,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1962 conditions, 385 events. 211/385 cut-off events. For 2783/2789 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1416 event pairs, 37 based on Foata normal form. 8/389 useless extension candidates. Maximal degree in co-relation 1923. Up to 319 conditions per place. [2024-06-03 20:17:53,334 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 57 selfloop transitions, 23 changer transitions 0/82 dead transitions. [2024-06-03 20:17:53,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 82 transitions, 824 flow [2024-06-03 20:17:53,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:17:53,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:17:53,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 83 transitions. [2024-06-03 20:17:53,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3458333333333333 [2024-06-03 20:17:53,335 INFO L175 Difference]: Start difference. First operand has 75 places, 71 transitions, 623 flow. Second operand 8 states and 83 transitions. [2024-06-03 20:17:53,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 82 transitions, 824 flow [2024-06-03 20:17:53,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 82 transitions, 781 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-03 20:17:53,341 INFO L231 Difference]: Finished difference. Result has 81 places, 73 transitions, 656 flow [2024-06-03 20:17:53,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=656, PETRI_PLACES=81, PETRI_TRANSITIONS=73} [2024-06-03 20:17:53,342 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 52 predicate places. [2024-06-03 20:17:53,342 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 73 transitions, 656 flow [2024-06-03 20:17:53,342 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) [2024-06-03 20:17:53,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:53,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:53,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 20:17:53,343 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)] === [2024-06-03 20:17:53,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:53,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1167356796, now seen corresponding path program 1 times [2024-06-03 20:17:53,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:53,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308627980] [2024-06-03 20:17:53,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:53,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:53,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:53,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:53,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:53,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308627980] [2024-06-03 20:17:53,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308627980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:53,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:53,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:17:53,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298523905] [2024-06-03 20:17:53,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:53,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:17:53,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:53,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:17:53,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:17:54,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:17:54,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 73 transitions, 656 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) [2024-06-03 20:17:54,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:54,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:17:54,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:54,233 INFO L124 PetriNetUnfolderBase]: 209/381 cut-off events. [2024-06-03 20:17:54,234 INFO L125 PetriNetUnfolderBase]: For 2572/2572 co-relation queries the response was YES. [2024-06-03 20:17:54,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1966 conditions, 381 events. 209/381 cut-off events. For 2572/2572 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1394 event pairs, 34 based on Foata normal form. 1/380 useless extension candidates. Maximal degree in co-relation 1925. Up to 318 conditions per place. [2024-06-03 20:17:54,237 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 66 selfloop transitions, 18 changer transitions 0/86 dead transitions. [2024-06-03 20:17:54,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 86 transitions, 868 flow [2024-06-03 20:17:54,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:17:54,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:17:54,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2024-06-03 20:17:54,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37142857142857144 [2024-06-03 20:17:54,239 INFO L175 Difference]: Start difference. First operand has 81 places, 73 transitions, 656 flow. Second operand 7 states and 78 transitions. [2024-06-03 20:17:54,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 86 transitions, 868 flow [2024-06-03 20:17:54,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 86 transitions, 809 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-03 20:17:54,247 INFO L231 Difference]: Finished difference. Result has 83 places, 73 transitions, 644 flow [2024-06-03 20:17:54,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=597, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=644, PETRI_PLACES=83, PETRI_TRANSITIONS=73} [2024-06-03 20:17:54,248 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 54 predicate places. [2024-06-03 20:17:54,248 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 73 transitions, 644 flow [2024-06-03 20:17:54,248 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) [2024-06-03 20:17:54,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:54,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:54,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 20:17:54,249 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)] === [2024-06-03 20:17:54,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:54,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1746840575, now seen corresponding path program 1 times [2024-06-03 20:17:54,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:54,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723280760] [2024-06-03 20:17:54,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:54,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:54,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:54,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:54,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:54,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723280760] [2024-06-03 20:17:54,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723280760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:54,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:54,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:17:54,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301099432] [2024-06-03 20:17:54,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:54,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:17:54,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:54,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:17:54,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:17:54,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:17:54,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 73 transitions, 644 flow. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:54,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:54,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:17:54,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:54,963 INFO L124 PetriNetUnfolderBase]: 215/393 cut-off events. [2024-06-03 20:17:54,963 INFO L125 PetriNetUnfolderBase]: For 3208/3214 co-relation queries the response was YES. [2024-06-03 20:17:54,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2008 conditions, 393 events. 215/393 cut-off events. For 3208/3214 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1474 event pairs, 40 based on Foata normal form. 6/394 useless extension candidates. Maximal degree in co-relation 1966. Up to 319 conditions per place. [2024-06-03 20:17:54,965 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 65 selfloop transitions, 19 changer transitions 0/86 dead transitions. [2024-06-03 20:17:54,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 86 transitions, 865 flow [2024-06-03 20:17:54,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:17:54,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:17:54,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 77 transitions. [2024-06-03 20:17:54,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-03 20:17:54,967 INFO L175 Difference]: Start difference. First operand has 83 places, 73 transitions, 644 flow. Second operand 7 states and 77 transitions. [2024-06-03 20:17:54,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 86 transitions, 865 flow [2024-06-03 20:17:54,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 86 transitions, 807 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 20:17:54,973 INFO L231 Difference]: Finished difference. Result has 83 places, 75 transitions, 649 flow [2024-06-03 20:17:54,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=649, PETRI_PLACES=83, PETRI_TRANSITIONS=75} [2024-06-03 20:17:54,973 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 54 predicate places. [2024-06-03 20:17:54,974 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 75 transitions, 649 flow [2024-06-03 20:17:54,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:54,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:54,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:54,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 20:17:54,974 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)] === [2024-06-03 20:17:54,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:54,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1163541781, now seen corresponding path program 2 times [2024-06-03 20:17:54,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:54,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104224995] [2024-06-03 20:17:54,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:54,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:54,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:55,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:55,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:55,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104224995] [2024-06-03 20:17:55,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104224995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:55,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:55,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:17:55,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332746224] [2024-06-03 20:17:55,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:55,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:17:55,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:55,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:17:55,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:17:55,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:17:55,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 75 transitions, 649 flow. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:55,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:55,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:17:55,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:55,679 INFO L124 PetriNetUnfolderBase]: 217/397 cut-off events. [2024-06-03 20:17:55,680 INFO L125 PetriNetUnfolderBase]: For 3312/3318 co-relation queries the response was YES. [2024-06-03 20:17:55,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1999 conditions, 397 events. 217/397 cut-off events. For 3312/3318 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1496 event pairs, 40 based on Foata normal form. 5/396 useless extension candidates. Maximal degree in co-relation 1957. Up to 196 conditions per place. [2024-06-03 20:17:55,682 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 47 selfloop transitions, 40 changer transitions 0/89 dead transitions. [2024-06-03 20:17:55,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 89 transitions, 940 flow [2024-06-03 20:17:55,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:17:55,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:17:55,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2024-06-03 20:17:55,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-06-03 20:17:55,684 INFO L175 Difference]: Start difference. First operand has 83 places, 75 transitions, 649 flow. Second operand 7 states and 86 transitions. [2024-06-03 20:17:55,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 89 transitions, 940 flow [2024-06-03 20:17:55,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 89 transitions, 902 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-03 20:17:55,690 INFO L231 Difference]: Finished difference. Result has 85 places, 77 transitions, 720 flow [2024-06-03 20:17:55,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=720, PETRI_PLACES=85, PETRI_TRANSITIONS=77} [2024-06-03 20:17:55,690 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 56 predicate places. [2024-06-03 20:17:55,691 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 77 transitions, 720 flow [2024-06-03 20:17:55,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:55,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:55,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:55,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 20:17:55,691 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)] === [2024-06-03 20:17:55,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:55,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1163547361, now seen corresponding path program 3 times [2024-06-03 20:17:55,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:55,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004185200] [2024-06-03 20:17:55,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:55,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:55,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:56,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:56,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:56,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004185200] [2024-06-03 20:17:56,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004185200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:56,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:56,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:17:56,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018209827] [2024-06-03 20:17:56,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:56,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:17:56,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:56,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:17:56,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:17:56,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:17:56,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 77 transitions, 720 flow. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:56,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:56,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:17:56,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:56,292 INFO L124 PetriNetUnfolderBase]: 217/397 cut-off events. [2024-06-03 20:17:56,292 INFO L125 PetriNetUnfolderBase]: For 3561/3567 co-relation queries the response was YES. [2024-06-03 20:17:56,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2094 conditions, 397 events. 217/397 cut-off events. For 3561/3567 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1507 event pairs, 37 based on Foata normal form. 3/394 useless extension candidates. Maximal degree in co-relation 2051. Up to 197 conditions per place. [2024-06-03 20:17:56,294 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 50 selfloop transitions, 38 changer transitions 0/90 dead transitions. [2024-06-03 20:17:56,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 90 transitions, 989 flow [2024-06-03 20:17:56,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:17:56,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:17:56,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2024-06-03 20:17:56,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-03 20:17:56,295 INFO L175 Difference]: Start difference. First operand has 85 places, 77 transitions, 720 flow. Second operand 7 states and 83 transitions. [2024-06-03 20:17:56,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 90 transitions, 989 flow [2024-06-03 20:17:56,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 90 transitions, 897 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-03 20:17:56,303 INFO L231 Difference]: Finished difference. Result has 87 places, 79 transitions, 735 flow [2024-06-03 20:17:56,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=630, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=735, PETRI_PLACES=87, PETRI_TRANSITIONS=79} [2024-06-03 20:17:56,304 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 58 predicate places. [2024-06-03 20:17:56,304 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 79 transitions, 735 flow [2024-06-03 20:17:56,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:56,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:56,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:56,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 20:17:56,304 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)] === [2024-06-03 20:17:56,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:56,305 INFO L85 PathProgramCache]: Analyzing trace with hash -539387324, now seen corresponding path program 1 times [2024-06-03 20:17:56,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:56,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351836004] [2024-06-03 20:17:56,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:56,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:56,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:56,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:56,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:56,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351836004] [2024-06-03 20:17:56,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351836004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:56,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:56,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:17:56,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708631851] [2024-06-03 20:17:56,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:56,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:17:56,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:56,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:17:56,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:17:57,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:17:57,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 79 transitions, 735 flow. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:57,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:57,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:17:57,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:57,172 INFO L124 PetriNetUnfolderBase]: 213/389 cut-off events. [2024-06-03 20:17:57,172 INFO L125 PetriNetUnfolderBase]: For 3481/3487 co-relation queries the response was YES. [2024-06-03 20:17:57,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2066 conditions, 389 events. 213/389 cut-off events. For 3481/3487 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1448 event pairs, 39 based on Foata normal form. 5/390 useless extension candidates. Maximal degree in co-relation 2022. Up to 330 conditions per place. [2024-06-03 20:17:57,175 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 65 selfloop transitions, 21 changer transitions 0/88 dead transitions. [2024-06-03 20:17:57,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 88 transitions, 938 flow [2024-06-03 20:17:57,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:17:57,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:17:57,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 83 transitions. [2024-06-03 20:17:57,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3458333333333333 [2024-06-03 20:17:57,176 INFO L175 Difference]: Start difference. First operand has 87 places, 79 transitions, 735 flow. Second operand 8 states and 83 transitions. [2024-06-03 20:17:57,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 88 transitions, 938 flow [2024-06-03 20:17:57,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 88 transitions, 880 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-03 20:17:57,184 INFO L231 Difference]: Finished difference. Result has 91 places, 80 transitions, 736 flow [2024-06-03 20:17:57,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=736, PETRI_PLACES=91, PETRI_TRANSITIONS=80} [2024-06-03 20:17:57,185 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 62 predicate places. [2024-06-03 20:17:57,185 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 80 transitions, 736 flow [2024-06-03 20:17:57,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:57,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:57,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:57,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 20:17:57,186 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)] === [2024-06-03 20:17:57,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:57,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1828382264, now seen corresponding path program 1 times [2024-06-03 20:17:57,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:57,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519943811] [2024-06-03 20:17:57,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:57,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:57,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:57,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:57,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:57,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519943811] [2024-06-03 20:17:57,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519943811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:57,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:57,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:17:57,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592292177] [2024-06-03 20:17:57,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:57,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:17:57,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:57,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:17:57,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:17:57,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:17:57,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 80 transitions, 736 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) [2024-06-03 20:17:57,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:57,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:17:57,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:58,076 INFO L124 PetriNetUnfolderBase]: 217/396 cut-off events. [2024-06-03 20:17:58,077 INFO L125 PetriNetUnfolderBase]: For 3827/3827 co-relation queries the response was YES. [2024-06-03 20:17:58,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2076 conditions, 396 events. 217/396 cut-off events. For 3827/3827 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1493 event pairs, 19 based on Foata normal form. 2/396 useless extension candidates. Maximal degree in co-relation 2031. Up to 322 conditions per place. [2024-06-03 20:17:58,079 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 80 selfloop transitions, 14 changer transitions 0/96 dead transitions. [2024-06-03 20:17:58,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 96 transitions, 974 flow [2024-06-03 20:17:58,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:17:58,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:17:58,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 84 transitions. [2024-06-03 20:17:58,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35 [2024-06-03 20:17:58,081 INFO L175 Difference]: Start difference. First operand has 91 places, 80 transitions, 736 flow. Second operand 8 states and 84 transitions. [2024-06-03 20:17:58,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 96 transitions, 974 flow [2024-06-03 20:17:58,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 96 transitions, 928 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 20:17:58,089 INFO L231 Difference]: Finished difference. Result has 93 places, 81 transitions, 730 flow [2024-06-03 20:17:58,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=690, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=730, PETRI_PLACES=93, PETRI_TRANSITIONS=81} [2024-06-03 20:17:58,090 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 64 predicate places. [2024-06-03 20:17:58,090 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 81 transitions, 730 flow [2024-06-03 20:17:58,090 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) [2024-06-03 20:17:58,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:58,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:58,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 20:17:58,091 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)] === [2024-06-03 20:17:58,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:58,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1679716326, now seen corresponding path program 1 times [2024-06-03 20:17:58,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:58,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607211278] [2024-06-03 20:17:58,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:58,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:58,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:58,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:58,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:58,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607211278] [2024-06-03 20:17:58,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607211278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:58,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:58,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:17:58,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606106998] [2024-06-03 20:17:58,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:58,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:17:58,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:58,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:17:58,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:17:58,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:17:58,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 81 transitions, 730 flow. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:58,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:58,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:17:58,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:58,869 INFO L124 PetriNetUnfolderBase]: 214/392 cut-off events. [2024-06-03 20:17:58,869 INFO L125 PetriNetUnfolderBase]: For 3934/3940 co-relation queries the response was YES. [2024-06-03 20:17:58,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2049 conditions, 392 events. 214/392 cut-off events. For 3934/3940 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1469 event pairs, 32 based on Foata normal form. 5/393 useless extension candidates. Maximal degree in co-relation 2003. Up to 313 conditions per place. [2024-06-03 20:17:58,872 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 70 selfloop transitions, 21 changer transitions 0/93 dead transitions. [2024-06-03 20:17:58,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 93 transitions, 956 flow [2024-06-03 20:17:58,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:17:58,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:17:58,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 77 transitions. [2024-06-03 20:17:58,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-03 20:17:58,873 INFO L175 Difference]: Start difference. First operand has 93 places, 81 transitions, 730 flow. Second operand 7 states and 77 transitions. [2024-06-03 20:17:58,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 93 transitions, 956 flow [2024-06-03 20:17:58,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 93 transitions, 924 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 20:17:58,882 INFO L231 Difference]: Finished difference. Result has 94 places, 81 transitions, 749 flow [2024-06-03 20:17:58,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=698, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=749, PETRI_PLACES=94, PETRI_TRANSITIONS=81} [2024-06-03 20:17:58,882 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 65 predicate places. [2024-06-03 20:17:58,882 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 81 transitions, 749 flow [2024-06-03 20:17:58,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:58,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:58,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:58,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 20:17:58,883 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)] === [2024-06-03 20:17:58,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:58,883 INFO L85 PathProgramCache]: Analyzing trace with hash 442491160, now seen corresponding path program 2 times [2024-06-03 20:17:58,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:58,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754973187] [2024-06-03 20:17:58,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:58,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:58,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:59,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:59,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:59,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754973187] [2024-06-03 20:17:59,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754973187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:59,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:59,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:17:59,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825565037] [2024-06-03 20:17:59,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:59,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:17:59,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:59,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:17:59,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:17:59,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:17:59,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 81 transitions, 749 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) [2024-06-03 20:17:59,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:59,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:17:59,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:59,906 INFO L124 PetriNetUnfolderBase]: 218/399 cut-off events. [2024-06-03 20:17:59,906 INFO L125 PetriNetUnfolderBase]: For 4498/4498 co-relation queries the response was YES. [2024-06-03 20:17:59,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2112 conditions, 399 events. 218/399 cut-off events. For 4498/4498 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1517 event pairs, 29 based on Foata normal form. 2/399 useless extension candidates. Maximal degree in co-relation 2065. Up to 326 conditions per place. [2024-06-03 20:17:59,908 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 76 selfloop transitions, 19 changer transitions 0/97 dead transitions. [2024-06-03 20:17:59,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 97 transitions, 995 flow [2024-06-03 20:17:59,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:17:59,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:17:59,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 86 transitions. [2024-06-03 20:17:59,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35833333333333334 [2024-06-03 20:17:59,910 INFO L175 Difference]: Start difference. First operand has 94 places, 81 transitions, 749 flow. Second operand 8 states and 86 transitions. [2024-06-03 20:17:59,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 97 transitions, 995 flow [2024-06-03 20:17:59,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 97 transitions, 906 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 20:17:59,919 INFO L231 Difference]: Finished difference. Result has 95 places, 82 transitions, 714 flow [2024-06-03 20:17:59,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=714, PETRI_PLACES=95, PETRI_TRANSITIONS=82} [2024-06-03 20:17:59,919 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 66 predicate places. [2024-06-03 20:17:59,919 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 82 transitions, 714 flow [2024-06-03 20:17:59,919 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) [2024-06-03 20:17:59,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:59,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:59,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 20:17:59,920 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)] === [2024-06-03 20:17:59,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:59,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1797803882, now seen corresponding path program 3 times [2024-06-03 20:17:59,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:59,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848644619] [2024-06-03 20:17:59,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:59,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:59,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:00,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:00,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:00,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848644619] [2024-06-03 20:18:00,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848644619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:00,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:00,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:18:00,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167087848] [2024-06-03 20:18:00,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:00,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:18:00,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:00,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:18:00,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:18:00,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:18:00,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 82 transitions, 714 flow. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:00,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:00,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:18:00,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:00,720 INFO L124 PetriNetUnfolderBase]: 222/407 cut-off events. [2024-06-03 20:18:00,720 INFO L125 PetriNetUnfolderBase]: For 4407/4407 co-relation queries the response was YES. [2024-06-03 20:18:00,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2104 conditions, 407 events. 222/407 cut-off events. For 4407/4407 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1555 event pairs, 29 based on Foata normal form. 2/407 useless extension candidates. Maximal degree in co-relation 2056. Up to 324 conditions per place. [2024-06-03 20:18:00,722 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 72 selfloop transitions, 23 changer transitions 0/97 dead transitions. [2024-06-03 20:18:00,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 97 transitions, 962 flow [2024-06-03 20:18:00,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:18:00,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:18:00,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 86 transitions. [2024-06-03 20:18:00,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35833333333333334 [2024-06-03 20:18:00,724 INFO L175 Difference]: Start difference. First operand has 95 places, 82 transitions, 714 flow. Second operand 8 states and 86 transitions. [2024-06-03 20:18:00,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 97 transitions, 962 flow [2024-06-03 20:18:00,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 97 transitions, 922 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 20:18:00,733 INFO L231 Difference]: Finished difference. Result has 97 places, 83 transitions, 736 flow [2024-06-03 20:18:00,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=674, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=736, PETRI_PLACES=97, PETRI_TRANSITIONS=83} [2024-06-03 20:18:00,733 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 68 predicate places. [2024-06-03 20:18:00,733 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 83 transitions, 736 flow [2024-06-03 20:18:00,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:00,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:00,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:00,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 20:18:00,734 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)] === [2024-06-03 20:18:00,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:00,734 INFO L85 PathProgramCache]: Analyzing trace with hash 459159490, now seen corresponding path program 1 times [2024-06-03 20:18:00,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:00,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605375871] [2024-06-03 20:18:00,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:00,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:00,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:01,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:01,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:01,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605375871] [2024-06-03 20:18:01,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605375871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:01,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:01,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:18:01,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422769599] [2024-06-03 20:18:01,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:01,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:18:01,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:01,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:18:01,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:18:01,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:18:01,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 83 transitions, 736 flow. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:01,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:01,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:18:01,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:01,594 INFO L124 PetriNetUnfolderBase]: 226/416 cut-off events. [2024-06-03 20:18:01,595 INFO L125 PetriNetUnfolderBase]: For 4986/4992 co-relation queries the response was YES. [2024-06-03 20:18:01,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2170 conditions, 416 events. 226/416 cut-off events. For 4986/4992 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1600 event pairs, 36 based on Foata normal form. 6/418 useless extension candidates. Maximal degree in co-relation 2121. Up to 328 conditions per place. [2024-06-03 20:18:01,597 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 72 selfloop transitions, 21 changer transitions 0/95 dead transitions. [2024-06-03 20:18:01,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 95 transitions, 1002 flow [2024-06-03 20:18:01,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:18:01,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:18:01,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 82 transitions. [2024-06-03 20:18:01,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3416666666666667 [2024-06-03 20:18:01,598 INFO L175 Difference]: Start difference. First operand has 97 places, 83 transitions, 736 flow. Second operand 8 states and 82 transitions. [2024-06-03 20:18:01,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 95 transitions, 1002 flow [2024-06-03 20:18:01,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 95 transitions, 950 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 20:18:01,608 INFO L231 Difference]: Finished difference. Result has 99 places, 84 transitions, 742 flow [2024-06-03 20:18:01,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=742, PETRI_PLACES=99, PETRI_TRANSITIONS=84} [2024-06-03 20:18:01,609 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 70 predicate places. [2024-06-03 20:18:01,609 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 84 transitions, 742 flow [2024-06-03 20:18:01,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:01,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:01,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:01,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 20:18:01,610 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)] === [2024-06-03 20:18:01,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:01,610 INFO L85 PathProgramCache]: Analyzing trace with hash 458862820, now seen corresponding path program 2 times [2024-06-03 20:18:01,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:01,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227823035] [2024-06-03 20:18:01,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:01,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:01,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:02,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:02,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:02,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227823035] [2024-06-03 20:18:02,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227823035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:02,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:02,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:18:02,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629926190] [2024-06-03 20:18:02,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:02,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:18:02,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:02,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:18:02,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:18:02,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:18:02,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 84 transitions, 742 flow. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:02,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:02,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:18:02,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:02,533 INFO L124 PetriNetUnfolderBase]: 223/411 cut-off events. [2024-06-03 20:18:02,533 INFO L125 PetriNetUnfolderBase]: For 4913/4919 co-relation queries the response was YES. [2024-06-03 20:18:02,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2117 conditions, 411 events. 223/411 cut-off events. For 4913/4919 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1583 event pairs, 37 based on Foata normal form. 6/413 useless extension candidates. Maximal degree in co-relation 2067. Up to 346 conditions per place. [2024-06-03 20:18:02,537 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 70 selfloop transitions, 22 changer transitions 0/94 dead transitions. [2024-06-03 20:18:02,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 94 transitions, 952 flow [2024-06-03 20:18:02,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:18:02,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:18:02,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 91 transitions. [2024-06-03 20:18:02,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.337037037037037 [2024-06-03 20:18:02,538 INFO L175 Difference]: Start difference. First operand has 99 places, 84 transitions, 742 flow. Second operand 9 states and 91 transitions. [2024-06-03 20:18:02,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 94 transitions, 952 flow [2024-06-03 20:18:02,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 94 transitions, 889 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-03 20:18:02,549 INFO L231 Difference]: Finished difference. Result has 102 places, 84 transitions, 727 flow [2024-06-03 20:18:02,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=679, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=727, PETRI_PLACES=102, PETRI_TRANSITIONS=84} [2024-06-03 20:18:02,550 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 73 predicate places. [2024-06-03 20:18:02,550 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 84 transitions, 727 flow [2024-06-03 20:18:02,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:02,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:02,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:02,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 20:18:02,551 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)] === [2024-06-03 20:18:02,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:02,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1171317538, now seen corresponding path program 1 times [2024-06-03 20:18:02,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:02,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362204709] [2024-06-03 20:18:02,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:02,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:03,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:03,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:03,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362204709] [2024-06-03 20:18:03,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362204709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:03,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:03,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:18:03,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299208704] [2024-06-03 20:18:03,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:03,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:18:03,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:03,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:18:03,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:18:03,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:18:03,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 84 transitions, 727 flow. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:03,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:03,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:18:03,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:03,513 INFO L124 PetriNetUnfolderBase]: 219/406 cut-off events. [2024-06-03 20:18:03,513 INFO L125 PetriNetUnfolderBase]: For 4700/4706 co-relation queries the response was YES. [2024-06-03 20:18:03,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2022 conditions, 406 events. 219/406 cut-off events. For 4700/4706 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1578 event pairs, 39 based on Foata normal form. 3/403 useless extension candidates. Maximal degree in co-relation 1972. Up to 214 conditions per place. [2024-06-03 20:18:03,516 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 57 selfloop transitions, 36 changer transitions 0/95 dead transitions. [2024-06-03 20:18:03,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 95 transitions, 953 flow [2024-06-03 20:18:03,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:18:03,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:18:03,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 92 transitions. [2024-06-03 20:18:03,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-03 20:18:03,518 INFO L175 Difference]: Start difference. First operand has 102 places, 84 transitions, 727 flow. Second operand 8 states and 92 transitions. [2024-06-03 20:18:03,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 95 transitions, 953 flow [2024-06-03 20:18:03,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 95 transitions, 889 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-03 20:18:03,529 INFO L231 Difference]: Finished difference. Result has 101 places, 84 transitions, 740 flow [2024-06-03 20:18:03,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=663, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=740, PETRI_PLACES=101, PETRI_TRANSITIONS=84} [2024-06-03 20:18:03,529 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 72 predicate places. [2024-06-03 20:18:03,529 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 84 transitions, 740 flow [2024-06-03 20:18:03,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:03,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:03,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:03,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 20:18:03,530 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)] === [2024-06-03 20:18:03,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:03,530 INFO L85 PathProgramCache]: Analyzing trace with hash 222502762, now seen corresponding path program 4 times [2024-06-03 20:18:03,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:03,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462413855] [2024-06-03 20:18:03,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:03,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:03,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:04,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:04,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:04,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462413855] [2024-06-03 20:18:04,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462413855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:04,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:04,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:18:04,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544060393] [2024-06-03 20:18:04,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:04,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:18:04,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:04,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:18:04,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:18:04,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:18:04,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 84 transitions, 740 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) [2024-06-03 20:18:04,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:04,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:18:04,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:04,480 INFO L124 PetriNetUnfolderBase]: 236/445 cut-off events. [2024-06-03 20:18:04,480 INFO L125 PetriNetUnfolderBase]: For 7838/7844 co-relation queries the response was YES. [2024-06-03 20:18:04,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2089 conditions, 445 events. 236/445 cut-off events. For 7838/7844 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1792 event pairs, 42 based on Foata normal form. 15/454 useless extension candidates. Maximal degree in co-relation 2039. Up to 199 conditions per place. [2024-06-03 20:18:04,483 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 57 selfloop transitions, 35 changer transitions 7/101 dead transitions. [2024-06-03 20:18:04,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 101 transitions, 1006 flow [2024-06-03 20:18:04,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:18:04,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:18:04,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 98 transitions. [2024-06-03 20:18:04,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-03 20:18:04,485 INFO L175 Difference]: Start difference. First operand has 101 places, 84 transitions, 740 flow. Second operand 8 states and 98 transitions. [2024-06-03 20:18:04,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 101 transitions, 1006 flow [2024-06-03 20:18:04,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 101 transitions, 923 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 20:18:04,498 INFO L231 Difference]: Finished difference. Result has 102 places, 82 transitions, 720 flow [2024-06-03 20:18:04,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=657, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=720, PETRI_PLACES=102, PETRI_TRANSITIONS=82} [2024-06-03 20:18:04,502 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 73 predicate places. [2024-06-03 20:18:04,502 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 82 transitions, 720 flow [2024-06-03 20:18:04,502 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) [2024-06-03 20:18:04,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:04,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:04,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 20:18:04,503 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)] === [2024-06-03 20:18:04,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:04,503 INFO L85 PathProgramCache]: Analyzing trace with hash -804516540, now seen corresponding path program 1 times [2024-06-03 20:18:04,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:04,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378381977] [2024-06-03 20:18:04,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:04,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:04,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:05,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:05,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:05,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378381977] [2024-06-03 20:18:05,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378381977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:05,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:05,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:18:05,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615808449] [2024-06-03 20:18:05,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:05,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:18:05,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:05,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:18:05,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:18:05,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:18:05,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 82 transitions, 720 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) [2024-06-03 20:18:05,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:05,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:18:05,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:05,311 INFO L124 PetriNetUnfolderBase]: 229/431 cut-off events. [2024-06-03 20:18:05,311 INFO L125 PetriNetUnfolderBase]: For 4952/4958 co-relation queries the response was YES. [2024-06-03 20:18:05,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2075 conditions, 431 events. 229/431 cut-off events. For 4952/4958 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1750 event pairs, 34 based on Foata normal form. 6/433 useless extension candidates. Maximal degree in co-relation 2024. Up to 353 conditions per place. [2024-06-03 20:18:05,314 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 84 selfloop transitions, 18 changer transitions 0/104 dead transitions. [2024-06-03 20:18:05,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 104 transitions, 1012 flow [2024-06-03 20:18:05,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:18:05,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:18:05,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 94 transitions. [2024-06-03 20:18:05,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34814814814814815 [2024-06-03 20:18:05,317 INFO L175 Difference]: Start difference. First operand has 102 places, 82 transitions, 720 flow. Second operand 9 states and 94 transitions. [2024-06-03 20:18:05,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 104 transitions, 1012 flow [2024-06-03 20:18:05,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 104 transitions, 881 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-03 20:18:05,330 INFO L231 Difference]: Finished difference. Result has 106 places, 88 transitions, 692 flow [2024-06-03 20:18:05,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=692, PETRI_PLACES=106, PETRI_TRANSITIONS=88} [2024-06-03 20:18:05,332 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 77 predicate places. [2024-06-03 20:18:05,332 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 88 transitions, 692 flow [2024-06-03 20:18:05,332 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) [2024-06-03 20:18:05,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:05,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:05,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 20:18:05,333 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)] === [2024-06-03 20:18:05,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:05,333 INFO L85 PathProgramCache]: Analyzing trace with hash 830450740, now seen corresponding path program 2 times [2024-06-03 20:18:05,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:05,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601033469] [2024-06-03 20:18:05,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:05,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:05,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:06,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:06,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:06,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601033469] [2024-06-03 20:18:06,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601033469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:06,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:06,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:18:06,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428199957] [2024-06-03 20:18:06,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:06,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:18:06,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:06,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:18:06,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:18:06,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:18:06,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 88 transitions, 692 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) [2024-06-03 20:18:06,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:06,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:18:06,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:06,263 INFO L124 PetriNetUnfolderBase]: 233/439 cut-off events. [2024-06-03 20:18:06,264 INFO L125 PetriNetUnfolderBase]: For 5047/5053 co-relation queries the response was YES. [2024-06-03 20:18:06,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2028 conditions, 439 events. 233/439 cut-off events. For 5047/5053 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1797 event pairs, 21 based on Foata normal form. 6/441 useless extension candidates. Maximal degree in co-relation 1974. Up to 327 conditions per place. [2024-06-03 20:18:06,266 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 81 selfloop transitions, 19 changer transitions 0/102 dead transitions. [2024-06-03 20:18:06,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 102 transitions, 936 flow [2024-06-03 20:18:06,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:18:06,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:18:06,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 82 transitions. [2024-06-03 20:18:06,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3416666666666667 [2024-06-03 20:18:06,269 INFO L175 Difference]: Start difference. First operand has 106 places, 88 transitions, 692 flow. Second operand 8 states and 82 transitions. [2024-06-03 20:18:06,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 102 transitions, 936 flow [2024-06-03 20:18:06,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 102 transitions, 904 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-03 20:18:06,282 INFO L231 Difference]: Finished difference. Result has 110 places, 89 transitions, 714 flow [2024-06-03 20:18:06,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=714, PETRI_PLACES=110, PETRI_TRANSITIONS=89} [2024-06-03 20:18:06,283 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 81 predicate places. [2024-06-03 20:18:06,283 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 89 transitions, 714 flow [2024-06-03 20:18:06,284 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) [2024-06-03 20:18:06,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:06,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:06,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 20:18:06,284 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)] === [2024-06-03 20:18:06,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:06,285 INFO L85 PathProgramCache]: Analyzing trace with hash -843400768, now seen corresponding path program 3 times [2024-06-03 20:18:06,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:06,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899207052] [2024-06-03 20:18:06,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:06,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:06,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:06,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:06,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:06,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899207052] [2024-06-03 20:18:06,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899207052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:06,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:06,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:18:06,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685470694] [2024-06-03 20:18:06,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:06,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:18:06,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:06,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:18:06,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:18:06,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:18:06,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 89 transitions, 714 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) [2024-06-03 20:18:06,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:06,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:18:06,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:07,174 INFO L124 PetriNetUnfolderBase]: 244/460 cut-off events. [2024-06-03 20:18:07,174 INFO L125 PetriNetUnfolderBase]: For 6161/6167 co-relation queries the response was YES. [2024-06-03 20:18:07,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2203 conditions, 460 events. 244/460 cut-off events. For 6161/6167 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1927 event pairs, 41 based on Foata normal form. 6/462 useless extension candidates. Maximal degree in co-relation 2148. Up to 347 conditions per place. [2024-06-03 20:18:07,177 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 80 selfloop transitions, 23 changer transitions 0/105 dead transitions. [2024-06-03 20:18:07,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 105 transitions, 1034 flow [2024-06-03 20:18:07,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:18:07,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:18:07,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2024-06-03 20:18:07,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3625 [2024-06-03 20:18:07,180 INFO L175 Difference]: Start difference. First operand has 110 places, 89 transitions, 714 flow. Second operand 8 states and 87 transitions. [2024-06-03 20:18:07,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 105 transitions, 1034 flow [2024-06-03 20:18:07,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 105 transitions, 986 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-03 20:18:07,193 INFO L231 Difference]: Finished difference. Result has 112 places, 91 transitions, 740 flow [2024-06-03 20:18:07,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=740, PETRI_PLACES=112, PETRI_TRANSITIONS=91} [2024-06-03 20:18:07,194 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 83 predicate places. [2024-06-03 20:18:07,194 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 91 transitions, 740 flow [2024-06-03 20:18:07,194 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) [2024-06-03 20:18:07,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:07,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:07,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 20:18:07,195 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)] === [2024-06-03 20:18:07,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:07,195 INFO L85 PathProgramCache]: Analyzing trace with hash 832328410, now seen corresponding path program 4 times [2024-06-03 20:18:07,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:07,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728569946] [2024-06-03 20:18:07,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:07,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:07,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:07,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:07,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:07,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728569946] [2024-06-03 20:18:07,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728569946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:07,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:07,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:18:07,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257836887] [2024-06-03 20:18:07,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:07,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:18:07,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:07,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:18:07,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:18:08,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:18:08,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 91 transitions, 740 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) [2024-06-03 20:18:08,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:08,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:18:08,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:08,262 INFO L124 PetriNetUnfolderBase]: 260/487 cut-off events. [2024-06-03 20:18:08,262 INFO L125 PetriNetUnfolderBase]: For 6272/6272 co-relation queries the response was YES. [2024-06-03 20:18:08,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2343 conditions, 487 events. 260/487 cut-off events. For 6272/6272 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2074 event pairs, 40 based on Foata normal form. 2/484 useless extension candidates. Maximal degree in co-relation 2287. Up to 408 conditions per place. [2024-06-03 20:18:08,265 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 85 selfloop transitions, 27 changer transitions 0/114 dead transitions. [2024-06-03 20:18:08,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 114 transitions, 1119 flow [2024-06-03 20:18:08,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:18:08,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:18:08,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 94 transitions. [2024-06-03 20:18:08,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34814814814814815 [2024-06-03 20:18:08,266 INFO L175 Difference]: Start difference. First operand has 112 places, 91 transitions, 740 flow. Second operand 9 states and 94 transitions. [2024-06-03 20:18:08,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 114 transitions, 1119 flow [2024-06-03 20:18:08,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 114 transitions, 1074 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-03 20:18:08,281 INFO L231 Difference]: Finished difference. Result has 121 places, 101 transitions, 910 flow [2024-06-03 20:18:08,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=705, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=910, PETRI_PLACES=121, PETRI_TRANSITIONS=101} [2024-06-03 20:18:08,282 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 92 predicate places. [2024-06-03 20:18:08,282 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 101 transitions, 910 flow [2024-06-03 20:18:08,282 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) [2024-06-03 20:18:08,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:08,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:08,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 20:18:08,283 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)] === [2024-06-03 20:18:08,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:08,283 INFO L85 PathProgramCache]: Analyzing trace with hash 2064011554, now seen corresponding path program 1 times [2024-06-03 20:18:08,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:08,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483820185] [2024-06-03 20:18:08,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:08,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:08,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:08,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:08,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:08,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483820185] [2024-06-03 20:18:08,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483820185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:08,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:08,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:18:08,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527876975] [2024-06-03 20:18:08,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:08,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:18:08,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:08,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:18:08,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:18:09,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:18:09,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 101 transitions, 910 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) [2024-06-03 20:18:09,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:09,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:18:09,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:09,218 INFO L124 PetriNetUnfolderBase]: 282/534 cut-off events. [2024-06-03 20:18:09,218 INFO L125 PetriNetUnfolderBase]: For 9682/9682 co-relation queries the response was YES. [2024-06-03 20:18:09,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2601 conditions, 534 events. 282/534 cut-off events. For 9682/9682 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2355 event pairs, 45 based on Foata normal form. 10/539 useless extension candidates. Maximal degree in co-relation 2539. Up to 400 conditions per place. [2024-06-03 20:18:09,222 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 84 selfloop transitions, 23 changer transitions 12/121 dead transitions. [2024-06-03 20:18:09,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 121 transitions, 1228 flow [2024-06-03 20:18:09,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:18:09,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:18:09,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2024-06-03 20:18:09,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3592592592592593 [2024-06-03 20:18:09,223 INFO L175 Difference]: Start difference. First operand has 121 places, 101 transitions, 910 flow. Second operand 9 states and 97 transitions. [2024-06-03 20:18:09,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 121 transitions, 1228 flow [2024-06-03 20:18:09,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 121 transitions, 1201 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-03 20:18:09,240 INFO L231 Difference]: Finished difference. Result has 128 places, 99 transitions, 911 flow [2024-06-03 20:18:09,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=883, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=911, PETRI_PLACES=128, PETRI_TRANSITIONS=99} [2024-06-03 20:18:09,240 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 99 predicate places. [2024-06-03 20:18:09,240 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 99 transitions, 911 flow [2024-06-03 20:18:09,241 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) [2024-06-03 20:18:09,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:09,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:09,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 20:18:09,241 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)] === [2024-06-03 20:18:09,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:09,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1471924532, now seen corresponding path program 2 times [2024-06-03 20:18:09,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:09,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373591256] [2024-06-03 20:18:09,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:09,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:09,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:09,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:09,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:09,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373591256] [2024-06-03 20:18:09,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373591256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:09,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:09,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:18:09,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379196246] [2024-06-03 20:18:09,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:09,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:18:09,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:09,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:18:09,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:18:09,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:18:09,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 99 transitions, 911 flow. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:09,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:09,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:18:09,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:10,059 INFO L124 PetriNetUnfolderBase]: 300/580 cut-off events. [2024-06-03 20:18:10,059 INFO L125 PetriNetUnfolderBase]: For 14403/14403 co-relation queries the response was YES. [2024-06-03 20:18:10,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3045 conditions, 580 events. 300/580 cut-off events. For 14403/14403 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2671 event pairs, 56 based on Foata normal form. 8/582 useless extension candidates. Maximal degree in co-relation 2981. Up to 223 conditions per place. [2024-06-03 20:18:10,062 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 66 selfloop transitions, 45 changer transitions 6/119 dead transitions. [2024-06-03 20:18:10,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 119 transitions, 1283 flow [2024-06-03 20:18:10,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:18:10,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:18:10,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 98 transitions. [2024-06-03 20:18:10,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-03 20:18:10,064 INFO L175 Difference]: Start difference. First operand has 128 places, 99 transitions, 911 flow. Second operand 8 states and 98 transitions. [2024-06-03 20:18:10,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 119 transitions, 1283 flow [2024-06-03 20:18:10,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 119 transitions, 1229 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-03 20:18:10,087 INFO L231 Difference]: Finished difference. Result has 126 places, 98 transitions, 947 flow [2024-06-03 20:18:10,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=859, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=947, PETRI_PLACES=126, PETRI_TRANSITIONS=98} [2024-06-03 20:18:10,089 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 97 predicate places. [2024-06-03 20:18:10,089 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 98 transitions, 947 flow [2024-06-03 20:18:10,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:10,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:10,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:10,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 20:18:10,090 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)] === [2024-06-03 20:18:10,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:10,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1471931972, now seen corresponding path program 3 times [2024-06-03 20:18:10,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:10,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210999700] [2024-06-03 20:18:10,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:10,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:10,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:10,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:10,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:10,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210999700] [2024-06-03 20:18:10,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210999700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:10,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:10,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:18:10,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797186337] [2024-06-03 20:18:10,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:10,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:18:10,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:10,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:18:10,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:18:10,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:18:10,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 98 transitions, 947 flow. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:10,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:10,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:18:10,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:10,839 INFO L124 PetriNetUnfolderBase]: 304/592 cut-off events. [2024-06-03 20:18:10,840 INFO L125 PetriNetUnfolderBase]: For 16039/16039 co-relation queries the response was YES. [2024-06-03 20:18:10,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3136 conditions, 592 events. 304/592 cut-off events. For 16039/16039 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2768 event pairs, 68 based on Foata normal form. 12/598 useless extension candidates. Maximal degree in co-relation 3073. Up to 348 conditions per place. [2024-06-03 20:18:10,843 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 60 selfloop transitions, 45 changer transitions 7/114 dead transitions. [2024-06-03 20:18:10,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 114 transitions, 1239 flow [2024-06-03 20:18:10,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:18:10,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:18:10,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 96 transitions. [2024-06-03 20:18:10,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-03 20:18:10,844 INFO L175 Difference]: Start difference. First operand has 126 places, 98 transitions, 947 flow. Second operand 8 states and 96 transitions. [2024-06-03 20:18:10,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 114 transitions, 1239 flow [2024-06-03 20:18:10,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 114 transitions, 1147 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-03 20:18:10,866 INFO L231 Difference]: Finished difference. Result has 126 places, 96 transitions, 940 flow [2024-06-03 20:18:10,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=855, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=940, PETRI_PLACES=126, PETRI_TRANSITIONS=96} [2024-06-03 20:18:10,866 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 97 predicate places. [2024-06-03 20:18:10,867 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 96 transitions, 940 flow [2024-06-03 20:18:10,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:10,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:10,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:10,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 20:18:10,867 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)] === [2024-06-03 20:18:10,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:10,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1477646264, now seen corresponding path program 5 times [2024-06-03 20:18:10,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:10,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025161002] [2024-06-03 20:18:10,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:10,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:10,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:11,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:11,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:11,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025161002] [2024-06-03 20:18:11,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025161002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:11,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:11,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:18:11,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622734759] [2024-06-03 20:18:11,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:11,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:18:11,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:11,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:18:11,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:18:11,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:18:11,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 96 transitions, 940 flow. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:11,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:11,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:18:11,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:11,823 INFO L124 PetriNetUnfolderBase]: 248/480 cut-off events. [2024-06-03 20:18:11,823 INFO L125 PetriNetUnfolderBase]: For 7433/7433 co-relation queries the response was YES. [2024-06-03 20:18:11,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2486 conditions, 480 events. 248/480 cut-off events. For 7433/7433 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2122 event pairs, 44 based on Foata normal form. 2/476 useless extension candidates. Maximal degree in co-relation 2423. Up to 284 conditions per place. [2024-06-03 20:18:11,825 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 66 selfloop transitions, 40 changer transitions 0/108 dead transitions. [2024-06-03 20:18:11,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 108 transitions, 1200 flow [2024-06-03 20:18:11,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:18:11,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:18:11,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2024-06-03 20:18:11,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37083333333333335 [2024-06-03 20:18:11,827 INFO L175 Difference]: Start difference. First operand has 126 places, 96 transitions, 940 flow. Second operand 8 states and 89 transitions. [2024-06-03 20:18:11,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 108 transitions, 1200 flow [2024-06-03 20:18:11,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 108 transitions, 1082 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 20:18:11,844 INFO L231 Difference]: Finished difference. Result has 127 places, 97 transitions, 920 flow [2024-06-03 20:18:11,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=920, PETRI_PLACES=127, PETRI_TRANSITIONS=97} [2024-06-03 20:18:11,844 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 98 predicate places. [2024-06-03 20:18:11,845 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 97 transitions, 920 flow [2024-06-03 20:18:11,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:11,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:11,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:11,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 20:18:11,845 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)] === [2024-06-03 20:18:11,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:11,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1477496162, now seen corresponding path program 4 times [2024-06-03 20:18:11,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:11,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832654847] [2024-06-03 20:18:11,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:11,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:11,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:12,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:12,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:12,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832654847] [2024-06-03 20:18:12,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832654847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:12,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:12,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:18:12,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437974821] [2024-06-03 20:18:12,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:12,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:18:12,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:12,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:18:12,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:18:12,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:18:12,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 97 transitions, 920 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) [2024-06-03 20:18:12,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:12,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:18:12,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:12,801 INFO L124 PetriNetUnfolderBase]: 270/526 cut-off events. [2024-06-03 20:18:12,802 INFO L125 PetriNetUnfolderBase]: For 11233/11233 co-relation queries the response was YES. [2024-06-03 20:18:12,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2613 conditions, 526 events. 270/526 cut-off events. For 11233/11233 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2395 event pairs, 48 based on Foata normal form. 10/530 useless extension candidates. Maximal degree in co-relation 2549. Up to 321 conditions per place. [2024-06-03 20:18:12,805 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 67 selfloop transitions, 36 changer transitions 11/116 dead transitions. [2024-06-03 20:18:12,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 116 transitions, 1232 flow [2024-06-03 20:18:12,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:18:12,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:18:12,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 100 transitions. [2024-06-03 20:18:12,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-03 20:18:12,806 INFO L175 Difference]: Start difference. First operand has 127 places, 97 transitions, 920 flow. Second operand 9 states and 100 transitions. [2024-06-03 20:18:12,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 116 transitions, 1232 flow [2024-06-03 20:18:12,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 116 transitions, 1140 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-03 20:18:12,825 INFO L231 Difference]: Finished difference. Result has 131 places, 96 transitions, 904 flow [2024-06-03 20:18:12,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=904, PETRI_PLACES=131, PETRI_TRANSITIONS=96} [2024-06-03 20:18:12,826 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 102 predicate places. [2024-06-03 20:18:12,826 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 96 transitions, 904 flow [2024-06-03 20:18:12,826 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) [2024-06-03 20:18:12,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:12,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:12,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 20:18:12,826 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)] === [2024-06-03 20:18:12,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:12,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1477649984, now seen corresponding path program 6 times [2024-06-03 20:18:12,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:12,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744145926] [2024-06-03 20:18:12,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:12,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:12,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:13,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:13,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:13,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744145926] [2024-06-03 20:18:13,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744145926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:13,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:13,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:18:13,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159595228] [2024-06-03 20:18:13,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:13,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:18:13,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:13,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:18:13,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:18:13,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:18:13,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 96 transitions, 904 flow. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:13,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:13,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:18:13,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:13,732 INFO L124 PetriNetUnfolderBase]: 241/471 cut-off events. [2024-06-03 20:18:13,732 INFO L125 PetriNetUnfolderBase]: For 7359/7359 co-relation queries the response was YES. [2024-06-03 20:18:13,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2351 conditions, 471 events. 241/471 cut-off events. For 7359/7359 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2085 event pairs, 43 based on Foata normal form. 2/467 useless extension candidates. Maximal degree in co-relation 2285. Up to 243 conditions per place. [2024-06-03 20:18:13,734 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 63 selfloop transitions, 42 changer transitions 0/107 dead transitions. [2024-06-03 20:18:13,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 107 transitions, 1146 flow [2024-06-03 20:18:13,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:18:13,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:18:13,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2024-06-03 20:18:13,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37083333333333335 [2024-06-03 20:18:13,737 INFO L175 Difference]: Start difference. First operand has 131 places, 96 transitions, 904 flow. Second operand 8 states and 89 transitions. [2024-06-03 20:18:13,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 107 transitions, 1146 flow [2024-06-03 20:18:13,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 107 transitions, 1068 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-03 20:18:13,754 INFO L231 Difference]: Finished difference. Result has 129 places, 96 transitions, 915 flow [2024-06-03 20:18:13,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=915, PETRI_PLACES=129, PETRI_TRANSITIONS=96} [2024-06-03 20:18:13,754 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 100 predicate places. [2024-06-03 20:18:13,754 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 96 transitions, 915 flow [2024-06-03 20:18:13,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:13,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:13,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:13,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 20:18:13,755 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)] === [2024-06-03 20:18:13,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:13,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1472133782, now seen corresponding path program 5 times [2024-06-03 20:18:13,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:13,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040170433] [2024-06-03 20:18:13,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:13,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:13,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:14,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:14,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:14,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040170433] [2024-06-03 20:18:14,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040170433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:14,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:14,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:18:14,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697518954] [2024-06-03 20:18:14,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:14,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:18:14,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:14,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:18:14,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:18:14,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:18:14,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 96 transitions, 915 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) [2024-06-03 20:18:14,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:14,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:18:14,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:14,675 INFO L124 PetriNetUnfolderBase]: 257/507 cut-off events. [2024-06-03 20:18:14,675 INFO L125 PetriNetUnfolderBase]: For 11013/11013 co-relation queries the response was YES. [2024-06-03 20:18:14,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2472 conditions, 507 events. 257/507 cut-off events. For 11013/11013 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2287 event pairs, 41 based on Foata normal form. 10/511 useless extension candidates. Maximal degree in co-relation 2407. Up to 280 conditions per place. [2024-06-03 20:18:14,678 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 59 selfloop transitions, 42 changer transitions 10/113 dead transitions. [2024-06-03 20:18:14,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 113 transitions, 1203 flow [2024-06-03 20:18:14,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:18:14,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:18:14,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-06-03 20:18:14,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37777777777777777 [2024-06-03 20:18:14,679 INFO L175 Difference]: Start difference. First operand has 129 places, 96 transitions, 915 flow. Second operand 9 states and 102 transitions. [2024-06-03 20:18:14,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 113 transitions, 1203 flow [2024-06-03 20:18:14,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 113 transitions, 1098 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-03 20:18:14,700 INFO L231 Difference]: Finished difference. Result has 131 places, 91 transitions, 858 flow [2024-06-03 20:18:14,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=858, PETRI_PLACES=131, PETRI_TRANSITIONS=91} [2024-06-03 20:18:14,700 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 102 predicate places. [2024-06-03 20:18:14,700 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 91 transitions, 858 flow [2024-06-03 20:18:14,701 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) [2024-06-03 20:18:14,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:14,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:14,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 20:18:14,701 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)] === [2024-06-03 20:18:14,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:14,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1951105990, now seen corresponding path program 6 times [2024-06-03 20:18:14,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:14,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842826863] [2024-06-03 20:18:14,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:14,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:14,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:15,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:15,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:15,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842826863] [2024-06-03 20:18:15,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842826863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:15,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:15,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:18:15,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677454692] [2024-06-03 20:18:15,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:15,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:18:15,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:15,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:18:15,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:18:15,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:18:15,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 91 transitions, 858 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) [2024-06-03 20:18:15,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:15,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:18:15,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:15,670 INFO L124 PetriNetUnfolderBase]: 243/489 cut-off events. [2024-06-03 20:18:15,670 INFO L125 PetriNetUnfolderBase]: For 11607/11607 co-relation queries the response was YES. [2024-06-03 20:18:15,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2346 conditions, 489 events. 243/489 cut-off events. For 11607/11607 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2230 event pairs, 55 based on Foata normal form. 10/493 useless extension candidates. Maximal degree in co-relation 2281. Up to 272 conditions per place. [2024-06-03 20:18:15,673 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 63 selfloop transitions, 33 changer transitions 9/107 dead transitions. [2024-06-03 20:18:15,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 107 transitions, 1128 flow [2024-06-03 20:18:15,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:18:15,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:18:15,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-06-03 20:18:15,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37777777777777777 [2024-06-03 20:18:15,674 INFO L175 Difference]: Start difference. First operand has 131 places, 91 transitions, 858 flow. Second operand 9 states and 102 transitions. [2024-06-03 20:18:15,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 107 transitions, 1128 flow [2024-06-03 20:18:15,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 107 transitions, 1010 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-03 20:18:15,692 INFO L231 Difference]: Finished difference. Result has 128 places, 88 transitions, 797 flow [2024-06-03 20:18:15,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=797, PETRI_PLACES=128, PETRI_TRANSITIONS=88} [2024-06-03 20:18:15,693 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 99 predicate places. [2024-06-03 20:18:15,693 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 88 transitions, 797 flow [2024-06-03 20:18:15,693 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) [2024-06-03 20:18:15,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:15,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:15,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 20:18:15,694 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)] === [2024-06-03 20:18:15,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:15,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1958465080, now seen corresponding path program 7 times [2024-06-03 20:18:15,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:15,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213527165] [2024-06-03 20:18:15,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:15,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:15,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:16,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:16,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:16,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213527165] [2024-06-03 20:18:16,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213527165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:16,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:16,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:18:16,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911843208] [2024-06-03 20:18:16,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:16,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:18:16,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:16,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:18:16,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:18:16,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:18:16,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 88 transitions, 797 flow. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:16,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:16,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:18:16,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:16,514 INFO L124 PetriNetUnfolderBase]: 244/500 cut-off events. [2024-06-03 20:18:16,515 INFO L125 PetriNetUnfolderBase]: For 13368/13368 co-relation queries the response was YES. [2024-06-03 20:18:16,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2446 conditions, 500 events. 244/500 cut-off events. For 13368/13368 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2294 event pairs, 64 based on Foata normal form. 8/502 useless extension candidates. Maximal degree in co-relation 2383. Up to 247 conditions per place. [2024-06-03 20:18:16,517 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 64 selfloop transitions, 30 changer transitions 9/105 dead transitions. [2024-06-03 20:18:16,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 105 transitions, 1121 flow [2024-06-03 20:18:16,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:18:16,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:18:16,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 97 transitions. [2024-06-03 20:18:16,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041666666666667 [2024-06-03 20:18:16,519 INFO L175 Difference]: Start difference. First operand has 128 places, 88 transitions, 797 flow. Second operand 8 states and 97 transitions. [2024-06-03 20:18:16,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 105 transitions, 1121 flow [2024-06-03 20:18:16,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 105 transitions, 1044 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-03 20:18:16,542 INFO L231 Difference]: Finished difference. Result has 125 places, 84 transitions, 763 flow [2024-06-03 20:18:16,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=724, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=763, PETRI_PLACES=125, PETRI_TRANSITIONS=84} [2024-06-03 20:18:16,542 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 96 predicate places. [2024-06-03 20:18:16,543 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 84 transitions, 763 flow [2024-06-03 20:18:16,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:16,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:16,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:16,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 20:18:16,543 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)] === [2024-06-03 20:18:16,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:16,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1958724550, now seen corresponding path program 8 times [2024-06-03 20:18:16,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:16,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450724909] [2024-06-03 20:18:16,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:16,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:16,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:17,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:17,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:17,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450724909] [2024-06-03 20:18:17,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450724909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:17,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:17,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:18:17,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663929959] [2024-06-03 20:18:17,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:17,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:18:17,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:17,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:18:17,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:18:17,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:18:17,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 84 transitions, 763 flow. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:17,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:17,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:18:17,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:17,244 INFO L124 PetriNetUnfolderBase]: 236/492 cut-off events. [2024-06-03 20:18:17,245 INFO L125 PetriNetUnfolderBase]: For 13477/13477 co-relation queries the response was YES. [2024-06-03 20:18:17,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2423 conditions, 492 events. 236/492 cut-off events. For 13477/13477 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2270 event pairs, 67 based on Foata normal form. 8/494 useless extension candidates. Maximal degree in co-relation 2361. Up to 189 conditions per place. [2024-06-03 20:18:17,247 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 62 selfloop transitions, 24 changer transitions 11/99 dead transitions. [2024-06-03 20:18:17,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 99 transitions, 1057 flow [2024-06-03 20:18:17,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:18:17,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:18:17,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2024-06-03 20:18:17,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37083333333333335 [2024-06-03 20:18:17,248 INFO L175 Difference]: Start difference. First operand has 125 places, 84 transitions, 763 flow. Second operand 8 states and 89 transitions. [2024-06-03 20:18:17,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 99 transitions, 1057 flow [2024-06-03 20:18:17,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 99 transitions, 985 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-03 20:18:17,268 INFO L231 Difference]: Finished difference. Result has 121 places, 79 transitions, 718 flow [2024-06-03 20:18:17,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=718, PETRI_PLACES=121, PETRI_TRANSITIONS=79} [2024-06-03 20:18:17,269 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 92 predicate places. [2024-06-03 20:18:17,269 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 79 transitions, 718 flow [2024-06-03 20:18:17,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:17,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:17,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:17,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 20:18:17,271 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)] === [2024-06-03 20:18:17,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:17,272 INFO L85 PathProgramCache]: Analyzing trace with hash -802638870, now seen corresponding path program 7 times [2024-06-03 20:18:17,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:17,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409447358] [2024-06-03 20:18:17,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:17,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:17,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:17,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:17,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:17,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409447358] [2024-06-03 20:18:17,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409447358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:17,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:17,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:18:17,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579913649] [2024-06-03 20:18:17,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:17,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:18:17,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:17,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:18:17,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:18:17,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-03 20:18:17,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 79 transitions, 718 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:17,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:17,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-03 20:18:17,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:18,164 INFO L124 PetriNetUnfolderBase]: 210/440 cut-off events. [2024-06-03 20:18:18,165 INFO L125 PetriNetUnfolderBase]: For 9632/9637 co-relation queries the response was YES. [2024-06-03 20:18:18,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2075 conditions, 440 events. 210/440 cut-off events. For 9632/9637 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1973 event pairs, 48 based on Foata normal form. 11/442 useless extension candidates. Maximal degree in co-relation 2015. Up to 239 conditions per place. [2024-06-03 20:18:18,167 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 44 selfloop transitions, 24 changer transitions 23/99 dead transitions. [2024-06-03 20:18:18,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 99 transitions, 1011 flow [2024-06-03 20:18:18,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:18:18,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:18:18,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 93 transitions. [2024-06-03 20:18:18,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-03 20:18:18,169 INFO L175 Difference]: Start difference. First operand has 121 places, 79 transitions, 718 flow. Second operand 8 states and 93 transitions. [2024-06-03 20:18:18,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 99 transitions, 1011 flow [2024-06-03 20:18:18,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 99 transitions, 940 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-03 20:18:18,185 INFO L231 Difference]: Finished difference. Result has 118 places, 68 transitions, 652 flow [2024-06-03 20:18:18,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=652, PETRI_PLACES=118, PETRI_TRANSITIONS=68} [2024-06-03 20:18:18,186 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 89 predicate places. [2024-06-03 20:18:18,186 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 68 transitions, 652 flow [2024-06-03 20:18:18,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:18,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:18,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:18,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 20:18:18,187 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)] === [2024-06-03 20:18:18,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:18,187 INFO L85 PathProgramCache]: Analyzing trace with hash 302991278, now seen corresponding path program 8 times [2024-06-03 20:18:18,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:18,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657602227] [2024-06-03 20:18:18,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:18,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:18,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:18,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:18,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:18,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657602227] [2024-06-03 20:18:18,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657602227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:18,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:18,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:18:18,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153123182] [2024-06-03 20:18:18,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:18,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:18:18,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:18,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:18:18,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:18:18,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:18:18,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 68 transitions, 652 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) [2024-06-03 20:18:18,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:18,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:18:18,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:18,996 INFO L124 PetriNetUnfolderBase]: 158/342 cut-off events. [2024-06-03 20:18:18,997 INFO L125 PetriNetUnfolderBase]: For 5578/5578 co-relation queries the response was YES. [2024-06-03 20:18:18,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1651 conditions, 342 events. 158/342 cut-off events. For 5578/5578 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1420 event pairs, 48 based on Foata normal form. 2/340 useless extension candidates. Maximal degree in co-relation 1592. Up to 266 conditions per place. [2024-06-03 20:18:18,998 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 54 selfloop transitions, 25 changer transitions 0/81 dead transitions. [2024-06-03 20:18:18,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 81 transitions, 846 flow [2024-06-03 20:18:19,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:18:19,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:18:19,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 93 transitions. [2024-06-03 20:18:19,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34444444444444444 [2024-06-03 20:18:19,021 INFO L175 Difference]: Start difference. First operand has 118 places, 68 transitions, 652 flow. Second operand 9 states and 93 transitions. [2024-06-03 20:18:19,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 81 transitions, 846 flow [2024-06-03 20:18:19,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 81 transitions, 797 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-03 20:18:19,031 INFO L231 Difference]: Finished difference. Result has 110 places, 68 transitions, 657 flow [2024-06-03 20:18:19,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=657, PETRI_PLACES=110, PETRI_TRANSITIONS=68} [2024-06-03 20:18:19,032 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 81 predicate places. [2024-06-03 20:18:19,032 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 68 transitions, 657 flow [2024-06-03 20:18:19,032 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) [2024-06-03 20:18:19,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:19,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:19,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 20:18:19,033 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)] === [2024-06-03 20:18:19,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:19,034 INFO L85 PathProgramCache]: Analyzing trace with hash -433711833, now seen corresponding path program 1 times [2024-06-03 20:18:19,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:19,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581191232] [2024-06-03 20:18:19,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:19,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:19,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:19,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:19,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:19,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581191232] [2024-06-03 20:18:19,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581191232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:19,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:19,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:18:19,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074446588] [2024-06-03 20:18:19,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:19,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:18:19,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:19,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:18:19,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:18:19,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:18:19,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 68 transitions, 657 flow. Second operand has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:19,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:19,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:18:19,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:19,834 INFO L124 PetriNetUnfolderBase]: 151/328 cut-off events. [2024-06-03 20:18:19,834 INFO L125 PetriNetUnfolderBase]: For 3820/3820 co-relation queries the response was YES. [2024-06-03 20:18:19,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1437 conditions, 328 events. 151/328 cut-off events. For 3820/3820 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1365 event pairs, 28 based on Foata normal form. 6/328 useless extension candidates. Maximal degree in co-relation 1383. Up to 183 conditions per place. [2024-06-03 20:18:19,836 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 46 selfloop transitions, 10 changer transitions 23/81 dead transitions. [2024-06-03 20:18:19,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 81 transitions, 845 flow [2024-06-03 20:18:19,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:18:19,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:18:19,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 81 transitions. [2024-06-03 20:18:19,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3375 [2024-06-03 20:18:19,837 INFO L175 Difference]: Start difference. First operand has 110 places, 68 transitions, 657 flow. Second operand 8 states and 81 transitions. [2024-06-03 20:18:19,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 81 transitions, 845 flow [2024-06-03 20:18:19,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 81 transitions, 763 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-03 20:18:19,844 INFO L231 Difference]: Finished difference. Result has 108 places, 57 transitions, 494 flow [2024-06-03 20:18:19,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=494, PETRI_PLACES=108, PETRI_TRANSITIONS=57} [2024-06-03 20:18:19,845 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 79 predicate places. [2024-06-03 20:18:19,845 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 57 transitions, 494 flow [2024-06-03 20:18:19,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:19,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:19,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:19,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 20:18:19,845 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)] === [2024-06-03 20:18:19,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:19,846 INFO L85 PathProgramCache]: Analyzing trace with hash -2093963089, now seen corresponding path program 2 times [2024-06-03 20:18:19,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:19,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029441064] [2024-06-03 20:18:19,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:19,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:19,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:20,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:20,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:20,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029441064] [2024-06-03 20:18:20,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029441064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:20,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:20,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:18:20,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441509052] [2024-06-03 20:18:20,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:20,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:18:20,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:20,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:18:20,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:18:20,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:18:20,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 57 transitions, 494 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) [2024-06-03 20:18:20,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:20,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:18:20,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:20,825 INFO L124 PetriNetUnfolderBase]: 112/257 cut-off events. [2024-06-03 20:18:20,825 INFO L125 PetriNetUnfolderBase]: For 3788/3788 co-relation queries the response was YES. [2024-06-03 20:18:20,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1098 conditions, 257 events. 112/257 cut-off events. For 3788/3788 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 974 event pairs, 11 based on Foata normal form. 6/259 useless extension candidates. Maximal degree in co-relation 1060. Up to 118 conditions per place. [2024-06-03 20:18:20,826 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 37 selfloop transitions, 14 changer transitions 18/71 dead transitions. [2024-06-03 20:18:20,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 71 transitions, 668 flow [2024-06-03 20:18:20,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:18:20,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:18:20,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 89 transitions. [2024-06-03 20:18:20,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3296296296296296 [2024-06-03 20:18:20,828 INFO L175 Difference]: Start difference. First operand has 108 places, 57 transitions, 494 flow. Second operand 9 states and 89 transitions. [2024-06-03 20:18:20,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 71 transitions, 668 flow [2024-06-03 20:18:20,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 71 transitions, 630 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-03 20:18:20,834 INFO L231 Difference]: Finished difference. Result has 98 places, 46 transitions, 370 flow [2024-06-03 20:18:20,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=370, PETRI_PLACES=98, PETRI_TRANSITIONS=46} [2024-06-03 20:18:20,835 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 69 predicate places. [2024-06-03 20:18:20,835 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 46 transitions, 370 flow [2024-06-03 20:18:20,835 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) [2024-06-03 20:18:20,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:20,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:20,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 20:18:20,835 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)] === [2024-06-03 20:18:20,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:20,836 INFO L85 PathProgramCache]: Analyzing trace with hash -375504063, now seen corresponding path program 3 times [2024-06-03 20:18:20,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:20,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495395770] [2024-06-03 20:18:20,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:20,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:20,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:21,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:21,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:21,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495395770] [2024-06-03 20:18:21,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495395770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:21,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:21,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:18:21,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103893475] [2024-06-03 20:18:21,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:21,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:18:21,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:21,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:18:21,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:18:21,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:18:21,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 46 transitions, 370 flow. Second operand has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:21,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:21,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:18:21,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:21,561 INFO L124 PetriNetUnfolderBase]: 89/212 cut-off events. [2024-06-03 20:18:21,562 INFO L125 PetriNetUnfolderBase]: For 2827/2827 co-relation queries the response was YES. [2024-06-03 20:18:21,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 888 conditions, 212 events. 89/212 cut-off events. For 2827/2827 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 759 event pairs, 26 based on Foata normal form. 6/214 useless extension candidates. Maximal degree in co-relation 854. Up to 72 conditions per place. [2024-06-03 20:18:21,563 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 24 selfloop transitions, 9 changer transitions 20/55 dead transitions. [2024-06-03 20:18:21,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 55 transitions, 496 flow [2024-06-03 20:18:21,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:18:21,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:18:21,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 76 transitions. [2024-06-03 20:18:21,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31666666666666665 [2024-06-03 20:18:21,564 INFO L175 Difference]: Start difference. First operand has 98 places, 46 transitions, 370 flow. Second operand 8 states and 76 transitions. [2024-06-03 20:18:21,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 55 transitions, 496 flow [2024-06-03 20:18:21,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 55 transitions, 421 flow, removed 6 selfloop flow, removed 15 redundant places. [2024-06-03 20:18:21,567 INFO L231 Difference]: Finished difference. Result has 85 places, 32 transitions, 213 flow [2024-06-03 20:18:21,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=213, PETRI_PLACES=85, PETRI_TRANSITIONS=32} [2024-06-03 20:18:21,568 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 56 predicate places. [2024-06-03 20:18:21,568 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 32 transitions, 213 flow [2024-06-03 20:18:21,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:21,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:21,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:21,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 20:18:21,569 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)] === [2024-06-03 20:18:21,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:21,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1437491401, now seen corresponding path program 4 times [2024-06-03 20:18:21,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:21,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895364442] [2024-06-03 20:18:21,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:21,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:21,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:22,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:22,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:22,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895364442] [2024-06-03 20:18:22,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895364442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:22,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:22,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:18:22,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021917366] [2024-06-03 20:18:22,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:22,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:18:22,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:22,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:18:22,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:18:22,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:18:22,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 32 transitions, 213 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) [2024-06-03 20:18:22,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:22,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:18:22,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:22,583 INFO L124 PetriNetUnfolderBase]: 62/152 cut-off events. [2024-06-03 20:18:22,583 INFO L125 PetriNetUnfolderBase]: For 2060/2060 co-relation queries the response was YES. [2024-06-03 20:18:22,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 591 conditions, 152 events. 62/152 cut-off events. For 2060/2060 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 445 event pairs, 7 based on Foata normal form. 6/154 useless extension candidates. Maximal degree in co-relation 561. Up to 38 conditions per place. [2024-06-03 20:18:22,583 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 18 selfloop transitions, 6 changer transitions 17/43 dead transitions. [2024-06-03 20:18:22,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 43 transitions, 319 flow [2024-06-03 20:18:22,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:18:22,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:18:22,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 79 transitions. [2024-06-03 20:18:22,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29259259259259257 [2024-06-03 20:18:22,585 INFO L175 Difference]: Start difference. First operand has 85 places, 32 transitions, 213 flow. Second operand 9 states and 79 transitions. [2024-06-03 20:18:22,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 43 transitions, 319 flow [2024-06-03 20:18:22,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 43 transitions, 271 flow, removed 10 selfloop flow, removed 16 redundant places. [2024-06-03 20:18:22,587 INFO L231 Difference]: Finished difference. Result has 65 places, 21 transitions, 111 flow [2024-06-03 20:18:22,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=111, PETRI_PLACES=65, PETRI_TRANSITIONS=21} [2024-06-03 20:18:22,588 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 36 predicate places. [2024-06-03 20:18:22,588 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 21 transitions, 111 flow [2024-06-03 20:18:22,588 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) [2024-06-03 20:18:22,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:22,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:22,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 20:18:22,589 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)] === [2024-06-03 20:18:22,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:22,589 INFO L85 PathProgramCache]: Analyzing trace with hash -782699907, now seen corresponding path program 5 times [2024-06-03 20:18:22,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:22,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391460157] [2024-06-03 20:18:22,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:22,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:22,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:23,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:23,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:23,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391460157] [2024-06-03 20:18:23,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391460157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:23,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:23,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:18:23,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479990743] [2024-06-03 20:18:23,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:23,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:18:23,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:23,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:18:23,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:18:23,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-06-03 20:18:23,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 21 transitions, 111 flow. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:23,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:23,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-06-03 20:18:23,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:23,558 INFO L124 PetriNetUnfolderBase]: 19/55 cut-off events. [2024-06-03 20:18:23,558 INFO L125 PetriNetUnfolderBase]: For 522/522 co-relation queries the response was YES. [2024-06-03 20:18:23,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 55 events. 19/55 cut-off events. For 522/522 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 6/60 useless extension candidates. Maximal degree in co-relation 154. Up to 24 conditions per place. [2024-06-03 20:18:23,559 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 0 selfloop transitions, 0 changer transitions 25/25 dead transitions. [2024-06-03 20:18:23,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 25 transitions, 139 flow [2024-06-03 20:18:23,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:18:23,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:18:23,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 64 transitions. [2024-06-03 20:18:23,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26666666666666666 [2024-06-03 20:18:23,559 INFO L175 Difference]: Start difference. First operand has 65 places, 21 transitions, 111 flow. Second operand 8 states and 64 transitions. [2024-06-03 20:18:23,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 25 transitions, 139 flow [2024-06-03 20:18:23,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 25 transitions, 103 flow, removed 2 selfloop flow, removed 18 redundant places. [2024-06-03 20:18:23,560 INFO L231 Difference]: Finished difference. Result has 44 places, 0 transitions, 0 flow [2024-06-03 20:18:23,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=44, PETRI_TRANSITIONS=0} [2024-06-03 20:18:23,561 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 15 predicate places. [2024-06-03 20:18:23,561 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 0 transitions, 0 flow [2024-06-03 20:18:23,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:23,563 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-03 20:18:23,564 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-03 20:18:23,564 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-03 20:18:23,564 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-03 20:18:23,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 20:18:23,565 INFO L445 BasicCegarLoop]: Path program histogram: [8, 8, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:23,567 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-03 20:18:23,567 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-03 20:18:23,570 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-03 20:18:23,570 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-03 20:18:23,571 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.06 08:18:23 BasicIcfg [2024-06-03 20:18:23,571 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-03 20:18:23,572 INFO L158 Benchmark]: Toolchain (without parser) took 42565.86ms. Allocated memory was 169.9MB in the beginning and 1.1GB in the end (delta: 954.2MB). Free memory was 138.8MB in the beginning and 827.5MB in the end (delta: -688.7MB). Peak memory consumption was 265.0MB. Max. memory is 16.1GB. [2024-06-03 20:18:23,572 INFO L158 Benchmark]: Witness Parser took 0.15ms. Allocated memory is still 169.9MB. Free memory is still 125.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-03 20:18:23,572 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 169.9MB. Free memory is still 138.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-03 20:18:23,572 INFO L158 Benchmark]: CACSL2BoogieTranslator took 599.96ms. Allocated memory is still 169.9MB. Free memory was 138.8MB in the beginning and 106.8MB in the end (delta: 32.0MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2024-06-03 20:18:23,572 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.91ms. Allocated memory is still 169.9MB. Free memory was 106.8MB in the beginning and 104.1MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-03 20:18:23,573 INFO L158 Benchmark]: Boogie Preprocessor took 32.80ms. Allocated memory is still 169.9MB. Free memory was 104.1MB in the beginning and 100.5MB in the end (delta: 3.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-03 20:18:23,573 INFO L158 Benchmark]: RCFGBuilder took 568.54ms. Allocated memory is still 169.9MB. Free memory was 100.5MB in the beginning and 50.7MB in the end (delta: 49.8MB). Peak memory consumption was 50.3MB. Max. memory is 16.1GB. [2024-06-03 20:18:23,573 INFO L158 Benchmark]: TraceAbstraction took 41320.75ms. Allocated memory was 169.9MB in the beginning and 1.1GB in the end (delta: 954.2MB). Free memory was 50.2MB in the beginning and 827.5MB in the end (delta: -777.4MB). Peak memory consumption was 176.9MB. Max. memory is 16.1GB. [2024-06-03 20:18:23,574 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.15ms. Allocated memory is still 169.9MB. Free memory is still 125.4MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.12ms. Allocated memory is still 169.9MB. Free memory is still 138.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 599.96ms. Allocated memory is still 169.9MB. Free memory was 138.8MB in the beginning and 106.8MB in the end (delta: 32.0MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.91ms. Allocated memory is still 169.9MB. Free memory was 106.8MB in the beginning and 104.1MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.80ms. Allocated memory is still 169.9MB. Free memory was 104.1MB in the beginning and 100.5MB in the end (delta: 3.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 568.54ms. Allocated memory is still 169.9MB. Free memory was 100.5MB in the beginning and 50.7MB in the end (delta: 49.8MB). Peak memory consumption was 50.3MB. Max. memory is 16.1GB. * TraceAbstraction took 41320.75ms. Allocated memory was 169.9MB in the beginning and 1.1GB in the end (delta: 954.2MB). Free memory was 50.2MB in the beginning and 827.5MB in the end (delta: -777.4MB). Peak memory consumption was 176.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 793]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 794]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 47 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: 41.2s, OverallIterations: 49, TraceHistogramMax: 1, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 11.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2231 SdHoareTripleChecker+Valid, 6.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1863 mSDsluCounter, 1384 SdHoareTripleChecker+Invalid, 5.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1195 mSDsCounter, 432 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9699 IncrementalHoareTripleChecker+Invalid, 10131 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 432 mSolverCounterUnsat, 189 mSDtfsCounter, 9699 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 395 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 390 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 9.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=947occurred in iteration=34, InterpolantAutomatonStates: 369, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 28.9s InterpolantComputationTime, 744 NumberOfCodeBlocks, 744 NumberOfCodeBlocksAsserted, 49 NumberOfCheckSat, 695 ConstructedInterpolants, 0 QuantifiedInterpolants, 27196 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 49 InterpolantComputations, 49 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! [2024-06-03 20:18:23,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE