./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/rfi000_power.opt_pso.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/rfi000_power.opt_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/rfi000_power.opt_pso.opt_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/rfi000_power.opt_pso.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 16:33:38,450 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 16:33:38,526 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 16:33:38,530 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 16:33:38,531 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 16:33:38,557 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 16:33:38,561 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 16:33:38,562 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 16:33:38,563 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 16:33:38,564 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 16:33:38,565 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 16:33:38,565 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 16:33:38,566 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 16:33:38,571 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 16:33:38,571 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 16:33:38,572 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 16:33:38,572 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 16:33:38,572 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 16:33:38,572 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 16:33:38,573 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 16:33:38,573 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 16:33:38,573 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 16:33:38,574 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 16:33:38,574 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 16:33:38,574 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 16:33:38,574 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 16:33:38,575 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 16:33:38,575 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 16:33:38,575 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 16:33:38,576 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 16:33:38,577 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 16:33:38,578 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 16:33:38,578 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:33:38,578 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 16:33:38,578 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 16:33:38,578 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 16:33:38,579 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 16:33:38,579 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 16:33:38,579 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 16:33:38,579 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 16:33:38,580 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 16:33:38,580 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 16:33:38,580 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 16:33:38,580 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 16:33:38,803 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 16:33:38,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 16:33:38,835 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 16:33:38,836 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 16:33:38,837 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 16:33:38,838 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi000_power.opt_pso.opt_rmo.opt.i [2024-06-20 16:33:39,995 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 16:33:40,232 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 16:33:40,232 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi000_power.opt_pso.opt_rmo.opt.i [2024-06-20 16:33:40,249 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96d8beb86/466b5a201df14c7593c8062544814b36/FLAG013d6e608 [2024-06-20 16:33:40,263 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96d8beb86/466b5a201df14c7593c8062544814b36 [2024-06-20 16:33:40,265 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 16:33:40,265 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 16:33:40,266 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/rfi000_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-20 16:33:40,417 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 16:33:40,419 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 16:33:40,421 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 16:33:40,421 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 16:33:40,425 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 16:33:40,426 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:33:40" (1/2) ... [2024-06-20 16:33:40,427 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a2a285d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:33:40, skipping insertion in model container [2024-06-20 16:33:40,427 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:33:40" (1/2) ... [2024-06-20 16:33:40,428 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@127551bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:33:40, skipping insertion in model container [2024-06-20 16:33:40,429 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:33:40" (2/2) ... [2024-06-20 16:33:40,429 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a2a285d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:33:40, skipping insertion in model container [2024-06-20 16:33:40,429 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:33:40" (2/2) ... [2024-06-20 16:33:40,430 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 16:33:40,494 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 16:33:40,496 INFO L97 edCorrectnessWitness]: Location invariant before [L803-L803] ((((((((((((((! multithreaded || x$read_delayed_var == 0) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! 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 || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((((0 <= x$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_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 2) && __unbuffered_p1_EBX <= 127) && ((__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1) || __unbuffered_p1_EBX == 2)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) [2024-06-20 16:33:40,496 INFO L97 edCorrectnessWitness]: Location invariant before [L804-L804] ((((((((((((((! multithreaded || x$read_delayed_var == 0) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! 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$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 2) && __unbuffered_p1_EBX <= 127) && ((__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1) || __unbuffered_p1_EBX == 2)))) && (! 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))) [2024-06-20 16:33:40,496 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 16:33:40,496 INFO L106 edCorrectnessWitness]: ghost_update [L801-L801] multithreaded = 1; [2024-06-20 16:33:40,543 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 16:33:40,896 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:33:40,907 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 16:33:41,064 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:33:41,105 INFO L206 MainTranslator]: Completed translation [2024-06-20 16:33:41,106 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:33:41 WrapperNode [2024-06-20 16:33:41,106 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 16:33:41,108 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 16:33:41,108 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 16:33:41,108 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 16:33:41,115 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:33:41" (1/1) ... [2024-06-20 16:33:41,145 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:33:41" (1/1) ... [2024-06-20 16:33:41,191 INFO L138 Inliner]: procedures = 174, calls = 38, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 138 [2024-06-20 16:33:41,192 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 16:33:41,195 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 16:33:41,195 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 16:33:41,195 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 16:33:41,205 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:33:41" (1/1) ... [2024-06-20 16:33:41,206 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:33:41" (1/1) ... [2024-06-20 16:33:41,224 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:33:41" (1/1) ... [2024-06-20 16:33:41,271 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-20 16:33:41,283 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:33:41" (1/1) ... [2024-06-20 16:33:41,283 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:33:41" (1/1) ... [2024-06-20 16:33:41,293 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:33:41" (1/1) ... [2024-06-20 16:33:41,297 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:33:41" (1/1) ... [2024-06-20 16:33:41,300 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:33:41" (1/1) ... [2024-06-20 16:33:41,307 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:33:41" (1/1) ... [2024-06-20 16:33:41,310 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 16:33:41,314 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 16:33:41,314 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 16:33:41,314 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 16:33:41,315 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:33:41" (1/1) ... [2024-06-20 16:33:41,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:33:41,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 16:33:41,377 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-20 16:33:41,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-20 16:33:41,415 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 16:33:41,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 16:33:41,416 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 16:33:41,416 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 16:33:41,416 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 16:33:41,416 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 16:33:41,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 16:33:41,417 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 16:33:41,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 16:33:41,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 16:33:41,421 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 16:33:41,529 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 16:33:41,531 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 16:33:41,818 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 16:33:41,818 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 16:33:41,947 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 16:33:41,948 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 16:33:41,951 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:33:41 BoogieIcfgContainer [2024-06-20 16:33:41,951 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 16:33:41,953 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 16:33:41,953 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 16:33:41,956 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 16:33:41,956 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 04:33:40" (1/4) ... [2024-06-20 16:33:41,958 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8c33ed6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:33:41, skipping insertion in model container [2024-06-20 16:33:41,958 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:33:40" (2/4) ... [2024-06-20 16:33:41,958 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8c33ed6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:33:41, skipping insertion in model container [2024-06-20 16:33:41,958 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:33:41" (3/4) ... [2024-06-20 16:33:41,959 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8c33ed6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:33:41, skipping insertion in model container [2024-06-20 16:33:41,959 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:33:41" (4/4) ... [2024-06-20 16:33:41,960 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi000_power.opt_pso.opt_rmo.opt.i [2024-06-20 16:33:41,975 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 16:33:41,975 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-20 16:33:41,975 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 16:33:42,020 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 16:33:42,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 31 transitions, 70 flow [2024-06-20 16:33:42,091 INFO L124 PetriNetUnfolderBase]: 0/29 cut-off events. [2024-06-20 16:33:42,092 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:33:42,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 29 events. 0/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 38 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 16:33:42,093 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 31 transitions, 70 flow [2024-06-20 16:33:42,096 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 23 transitions, 52 flow [2024-06-20 16:33:42,103 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 16:33:42,110 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;@4e18afc6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 16:33:42,110 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-20 16:33:42,115 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 16:33:42,116 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 16:33:42,116 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:33:42,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:42,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 16:33:42,117 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:33:42,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:42,122 INFO L85 PathProgramCache]: Analyzing trace with hash 328598881, now seen corresponding path program 1 times [2024-06-20 16:33:42,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:42,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389369265] [2024-06-20 16:33:42,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:42,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:42,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:43,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:43,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:43,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389369265] [2024-06-20 16:33:43,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389369265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:43,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:43,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 16:33:43,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648151196] [2024-06-20 16:33:43,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:43,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 16:33:43,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:43,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 16:33:43,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 16:33:43,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-20 16:33:43,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:43,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:43,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-20 16:33:43,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:43,457 INFO L124 PetriNetUnfolderBase]: 162/316 cut-off events. [2024-06-20 16:33:43,457 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-06-20 16:33:43,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 627 conditions, 316 events. 162/316 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1171 event pairs, 97 based on Foata normal form. 1/303 useless extension candidates. Maximal degree in co-relation 616. Up to 288 conditions per place. [2024-06-20 16:33:43,464 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 21 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2024-06-20 16:33:43,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 29 transitions, 115 flow [2024-06-20 16:33:43,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 16:33:43,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 16:33:43,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2024-06-20 16:33:43,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5698924731182796 [2024-06-20 16:33:43,477 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 52 flow. Second operand 3 states and 53 transitions. [2024-06-20 16:33:43,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 29 transitions, 115 flow [2024-06-20 16:33:43,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 29 transitions, 112 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-20 16:33:43,482 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 71 flow [2024-06-20 16:33:43,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=31, PETRI_TRANSITIONS=25} [2024-06-20 16:33:43,486 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2024-06-20 16:33:43,487 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 71 flow [2024-06-20 16:33:43,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:43,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:43,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:43,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 16:33:43,488 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:33:43,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:43,490 INFO L85 PathProgramCache]: Analyzing trace with hash -2044034496, now seen corresponding path program 1 times [2024-06-20 16:33:43,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:43,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075882706] [2024-06-20 16:33:43,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:43,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:43,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:44,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:44,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:44,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075882706] [2024-06-20 16:33:44,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075882706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:44,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:44,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 16:33:44,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730105045] [2024-06-20 16:33:44,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:44,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 16:33:44,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:44,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 16:33:44,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 16:33:44,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-20 16:33:44,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 71 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:44,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:44,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-20 16:33:44,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:44,225 INFO L124 PetriNetUnfolderBase]: 213/381 cut-off events. [2024-06-20 16:33:44,225 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2024-06-20 16:33:44,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 877 conditions, 381 events. 213/381 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1345 event pairs, 109 based on Foata normal form. 2/382 useless extension candidates. Maximal degree in co-relation 865. Up to 364 conditions per place. [2024-06-20 16:33:44,231 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 27 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2024-06-20 16:33:44,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 35 transitions, 161 flow [2024-06-20 16:33:44,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 16:33:44,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 16:33:44,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2024-06-20 16:33:44,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-20 16:33:44,236 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 71 flow. Second operand 4 states and 62 transitions. [2024-06-20 16:33:44,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 35 transitions, 161 flow [2024-06-20 16:33:44,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:33:44,240 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 95 flow [2024-06-20 16:33:44,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2024-06-20 16:33:44,242 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2024-06-20 16:33:44,242 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 95 flow [2024-06-20 16:33:44,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:44,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:44,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:44,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 16:33:44,244 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:33:44,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:44,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1059440774, now seen corresponding path program 1 times [2024-06-20 16:33:44,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:44,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909424271] [2024-06-20 16:33:44,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:44,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:44,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:44,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:44,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:44,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909424271] [2024-06-20 16:33:44,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909424271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:44,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:44,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 16:33:44,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577254194] [2024-06-20 16:33:44,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:44,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 16:33:44,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:44,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 16:33:44,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 16:33:44,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-20 16:33:44,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 95 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:44,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:44,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-20 16:33:44,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:45,096 INFO L124 PetriNetUnfolderBase]: 207/371 cut-off events. [2024-06-20 16:33:45,097 INFO L125 PetriNetUnfolderBase]: For 219/219 co-relation queries the response was YES. [2024-06-20 16:33:45,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 944 conditions, 371 events. 207/371 cut-off events. For 219/219 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1274 event pairs, 61 based on Foata normal form. 4/374 useless extension candidates. Maximal degree in co-relation 930. Up to 336 conditions per place. [2024-06-20 16:33:45,099 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 32 selfloop transitions, 7 changer transitions 0/42 dead transitions. [2024-06-20 16:33:45,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 42 transitions, 213 flow [2024-06-20 16:33:45,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:33:45,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:33:45,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 76 transitions. [2024-06-20 16:33:45,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49032258064516127 [2024-06-20 16:33:45,101 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 95 flow. Second operand 5 states and 76 transitions. [2024-06-20 16:33:45,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 42 transitions, 213 flow [2024-06-20 16:33:45,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 42 transitions, 204 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-20 16:33:45,103 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 119 flow [2024-06-20 16:33:45,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=119, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2024-06-20 16:33:45,104 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2024-06-20 16:33:45,104 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 119 flow [2024-06-20 16:33:45,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:45,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:45,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:45,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 16:33:45,105 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)] === [2024-06-20 16:33:45,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:45,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1503579947, now seen corresponding path program 1 times [2024-06-20 16:33:45,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:45,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906218838] [2024-06-20 16:33:45,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:45,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:45,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:46,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:46,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:46,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906218838] [2024-06-20 16:33:46,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906218838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:46,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:46,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:33:46,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107952927] [2024-06-20 16:33:46,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:46,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:33:46,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:46,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:33:46,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:33:46,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-20 16:33:46,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 119 flow. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:46,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:46,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-20 16:33:46,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:46,378 INFO L124 PetriNetUnfolderBase]: 203/363 cut-off events. [2024-06-20 16:33:46,378 INFO L125 PetriNetUnfolderBase]: For 359/359 co-relation queries the response was YES. [2024-06-20 16:33:46,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1005 conditions, 363 events. 203/363 cut-off events. For 359/359 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1228 event pairs, 36 based on Foata normal form. 4/366 useless extension candidates. Maximal degree in co-relation 990. Up to 310 conditions per place. [2024-06-20 16:33:46,381 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 32 selfloop transitions, 8 changer transitions 0/43 dead transitions. [2024-06-20 16:33:46,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 43 transitions, 227 flow [2024-06-20 16:33:46,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:33:46,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:33:46,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 84 transitions. [2024-06-20 16:33:46,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-06-20 16:33:46,386 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 119 flow. Second operand 6 states and 84 transitions. [2024-06-20 16:33:46,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 43 transitions, 227 flow [2024-06-20 16:33:46,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 43 transitions, 212 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-20 16:33:46,390 INFO L231 Difference]: Finished difference. Result has 39 places, 28 transitions, 116 flow [2024-06-20 16:33:46,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=116, PETRI_PLACES=39, PETRI_TRANSITIONS=28} [2024-06-20 16:33:46,391 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 9 predicate places. [2024-06-20 16:33:46,391 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 28 transitions, 116 flow [2024-06-20 16:33:46,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:46,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:46,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:46,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 16:33:46,393 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:33:46,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:46,393 INFO L85 PathProgramCache]: Analyzing trace with hash -57901863, now seen corresponding path program 1 times [2024-06-20 16:33:46,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:46,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032589911] [2024-06-20 16:33:46,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:46,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:46,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:47,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:47,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:47,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032589911] [2024-06-20 16:33:47,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032589911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:47,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:47,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:33:47,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926906771] [2024-06-20 16:33:47,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:47,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:33:47,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:47,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:33:47,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:33:47,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-20 16:33:47,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 28 transitions, 116 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:47,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:47,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-20 16:33:47,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:47,296 INFO L124 PetriNetUnfolderBase]: 147/294 cut-off events. [2024-06-20 16:33:47,296 INFO L125 PetriNetUnfolderBase]: For 377/377 co-relation queries the response was YES. [2024-06-20 16:33:47,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 821 conditions, 294 events. 147/294 cut-off events. For 377/377 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1053 event pairs, 53 based on Foata normal form. 1/288 useless extension candidates. Maximal degree in co-relation 804. Up to 259 conditions per place. [2024-06-20 16:33:47,298 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 25 selfloop transitions, 6 changer transitions 0/35 dead transitions. [2024-06-20 16:33:47,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 35 transitions, 196 flow [2024-06-20 16:33:47,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:33:47,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:33:47,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 63 transitions. [2024-06-20 16:33:47,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4064516129032258 [2024-06-20 16:33:47,300 INFO L175 Difference]: Start difference. First operand has 39 places, 28 transitions, 116 flow. Second operand 5 states and 63 transitions. [2024-06-20 16:33:47,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 35 transitions, 196 flow [2024-06-20 16:33:47,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 35 transitions, 176 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-20 16:33:47,303 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 123 flow [2024-06-20 16:33:47,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=123, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2024-06-20 16:33:47,303 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2024-06-20 16:33:47,304 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 123 flow [2024-06-20 16:33:47,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:47,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:47,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:47,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 16:33:47,305 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:33:47,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:47,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1794956527, now seen corresponding path program 1 times [2024-06-20 16:33:47,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:47,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644351442] [2024-06-20 16:33:47,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:47,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:47,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:48,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:48,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644351442] [2024-06-20 16:33:48,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644351442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:48,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:48,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:33:48,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897298210] [2024-06-20 16:33:48,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:48,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:33:48,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:48,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:33:48,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:33:48,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:48,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 123 flow. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:48,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:48,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:48,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:48,276 INFO L124 PetriNetUnfolderBase]: 203/365 cut-off events. [2024-06-20 16:33:48,277 INFO L125 PetriNetUnfolderBase]: For 708/710 co-relation queries the response was YES. [2024-06-20 16:33:48,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1105 conditions, 365 events. 203/365 cut-off events. For 708/710 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1261 event pairs, 74 based on Foata normal form. 4/368 useless extension candidates. Maximal degree in co-relation 1086. Up to 327 conditions per place. [2024-06-20 16:33:48,280 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 29 selfloop transitions, 12 changer transitions 0/43 dead transitions. [2024-06-20 16:33:48,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 253 flow [2024-06-20 16:33:48,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:33:48,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:33:48,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 68 transitions. [2024-06-20 16:33:48,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2024-06-20 16:33:48,282 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 123 flow. Second operand 6 states and 68 transitions. [2024-06-20 16:33:48,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 253 flow [2024-06-20 16:33:48,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 242 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-20 16:33:48,286 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 180 flow [2024-06-20 16:33:48,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=180, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2024-06-20 16:33:48,288 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 14 predicate places. [2024-06-20 16:33:48,289 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 180 flow [2024-06-20 16:33:48,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:48,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:48,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:48,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 16:33:48,289 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:33:48,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:48,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1239073528, now seen corresponding path program 1 times [2024-06-20 16:33:48,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:48,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622850732] [2024-06-20 16:33:48,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:48,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:48,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:49,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:49,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:49,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622850732] [2024-06-20 16:33:49,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622850732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:49,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:49,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:33:49,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443649602] [2024-06-20 16:33:49,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:49,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:33:49,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:49,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:33:49,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:33:49,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:49,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 180 flow. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:49,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:49,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:49,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:49,232 INFO L124 PetriNetUnfolderBase]: 210/377 cut-off events. [2024-06-20 16:33:49,232 INFO L125 PetriNetUnfolderBase]: For 1014/1014 co-relation queries the response was YES. [2024-06-20 16:33:49,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1298 conditions, 377 events. 210/377 cut-off events. For 1014/1014 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1294 event pairs, 75 based on Foata normal form. 1/377 useless extension candidates. Maximal degree in co-relation 1277. Up to 354 conditions per place. [2024-06-20 16:33:49,235 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 38 selfloop transitions, 11 changer transitions 0/51 dead transitions. [2024-06-20 16:33:49,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 51 transitions, 336 flow [2024-06-20 16:33:49,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:33:49,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:33:49,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 75 transitions. [2024-06-20 16:33:49,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3456221198156682 [2024-06-20 16:33:49,238 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 180 flow. Second operand 7 states and 75 transitions. [2024-06-20 16:33:49,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 51 transitions, 336 flow [2024-06-20 16:33:49,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 51 transitions, 322 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-20 16:33:49,242 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 235 flow [2024-06-20 16:33:49,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=235, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2024-06-20 16:33:49,243 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 20 predicate places. [2024-06-20 16:33:49,244 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 235 flow [2024-06-20 16:33:49,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:49,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:49,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:49,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 16:33:49,244 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:33:49,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:49,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1646536706, now seen corresponding path program 2 times [2024-06-20 16:33:49,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:49,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005015555] [2024-06-20 16:33:49,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:49,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:49,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:49,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:49,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:49,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005015555] [2024-06-20 16:33:49,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005015555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:49,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:49,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:33:49,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288214457] [2024-06-20 16:33:49,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:49,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:33:49,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:49,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:33:49,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:33:49,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:49,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 235 flow. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:49,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:49,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:49,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:50,180 INFO L124 PetriNetUnfolderBase]: 213/382 cut-off events. [2024-06-20 16:33:50,180 INFO L125 PetriNetUnfolderBase]: For 1348/1348 co-relation queries the response was YES. [2024-06-20 16:33:50,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1410 conditions, 382 events. 213/382 cut-off events. For 1348/1348 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1317 event pairs, 74 based on Foata normal form. 1/382 useless extension candidates. Maximal degree in co-relation 1386. Up to 356 conditions per place. [2024-06-20 16:33:50,184 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 37 selfloop transitions, 12 changer transitions 0/51 dead transitions. [2024-06-20 16:33:50,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 51 transitions, 374 flow [2024-06-20 16:33:50,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:33:50,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:33:50,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 66 transitions. [2024-06-20 16:33:50,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-20 16:33:50,186 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 235 flow. Second operand 6 states and 66 transitions. [2024-06-20 16:33:50,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 51 transitions, 374 flow [2024-06-20 16:33:50,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 353 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-20 16:33:50,189 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 269 flow [2024-06-20 16:33:50,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=269, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2024-06-20 16:33:50,192 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 22 predicate places. [2024-06-20 16:33:50,192 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 269 flow [2024-06-20 16:33:50,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:50,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:50,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:50,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 16:33:50,193 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:33:50,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:50,194 INFO L85 PathProgramCache]: Analyzing trace with hash -390902398, now seen corresponding path program 3 times [2024-06-20 16:33:50,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:50,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368392513] [2024-06-20 16:33:50,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:50,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:50,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:50,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:50,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:50,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368392513] [2024-06-20 16:33:50,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368392513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:50,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:50,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:33:50,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047844805] [2024-06-20 16:33:50,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:50,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:33:50,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:50,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:33:50,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:33:50,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:50,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 269 flow. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:50,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:50,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:50,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:51,116 INFO L124 PetriNetUnfolderBase]: 208/375 cut-off events. [2024-06-20 16:33:51,116 INFO L125 PetriNetUnfolderBase]: For 1694/1696 co-relation queries the response was YES. [2024-06-20 16:33:51,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1418 conditions, 375 events. 208/375 cut-off events. For 1694/1696 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1290 event pairs, 77 based on Foata normal form. 4/378 useless extension candidates. Maximal degree in co-relation 1393. Up to 329 conditions per place. [2024-06-20 16:33:51,119 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 31 selfloop transitions, 16 changer transitions 0/49 dead transitions. [2024-06-20 16:33:51,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 49 transitions, 379 flow [2024-06-20 16:33:51,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:33:51,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:33:51,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 67 transitions. [2024-06-20 16:33:51,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3602150537634409 [2024-06-20 16:33:51,120 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 269 flow. Second operand 6 states and 67 transitions. [2024-06-20 16:33:51,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 49 transitions, 379 flow [2024-06-20 16:33:51,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 49 transitions, 349 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-20 16:33:51,129 INFO L231 Difference]: Finished difference. Result has 54 places, 43 transitions, 278 flow [2024-06-20 16:33:51,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=278, PETRI_PLACES=54, PETRI_TRANSITIONS=43} [2024-06-20 16:33:51,130 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 24 predicate places. [2024-06-20 16:33:51,130 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 43 transitions, 278 flow [2024-06-20 16:33:51,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:51,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:51,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:51,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 16:33:51,131 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:33:51,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:51,132 INFO L85 PathProgramCache]: Analyzing trace with hash 190923768, now seen corresponding path program 1 times [2024-06-20 16:33:51,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:51,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758003397] [2024-06-20 16:33:51,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:51,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:51,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:51,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:51,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:51,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758003397] [2024-06-20 16:33:51,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758003397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:51,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:51,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:33:51,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193554325] [2024-06-20 16:33:51,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:51,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:33:51,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:51,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:33:51,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:33:51,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:51,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 43 transitions, 278 flow. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:51,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:51,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:51,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:52,093 INFO L124 PetriNetUnfolderBase]: 209/377 cut-off events. [2024-06-20 16:33:52,093 INFO L125 PetriNetUnfolderBase]: For 1626/1628 co-relation queries the response was YES. [2024-06-20 16:33:52,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1423 conditions, 377 events. 209/377 cut-off events. For 1626/1628 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1318 event pairs, 75 based on Foata normal form. 4/380 useless extension candidates. Maximal degree in co-relation 1397. Up to 319 conditions per place. [2024-06-20 16:33:52,096 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 32 selfloop transitions, 22 changer transitions 0/56 dead transitions. [2024-06-20 16:33:52,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 56 transitions, 446 flow [2024-06-20 16:33:52,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:33:52,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:33:52,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2024-06-20 16:33:52,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35944700460829493 [2024-06-20 16:33:52,097 INFO L175 Difference]: Start difference. First operand has 54 places, 43 transitions, 278 flow. Second operand 7 states and 78 transitions. [2024-06-20 16:33:52,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 56 transitions, 446 flow [2024-06-20 16:33:52,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 56 transitions, 401 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 16:33:52,101 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 313 flow [2024-06-20 16:33:52,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=313, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-06-20 16:33:52,102 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 26 predicate places. [2024-06-20 16:33:52,102 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 313 flow [2024-06-20 16:33:52,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:52,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:52,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:52,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 16:33:52,103 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:33:52,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:52,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1947143788, now seen corresponding path program 1 times [2024-06-20 16:33:52,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:52,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811047703] [2024-06-20 16:33:52,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:52,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:52,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:52,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:52,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811047703] [2024-06-20 16:33:52,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811047703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:52,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:52,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:33:52,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083663393] [2024-06-20 16:33:52,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:52,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:33:52,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:52,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:33:52,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:33:52,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:52,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 313 flow. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:52,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:52,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:52,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:53,144 INFO L124 PetriNetUnfolderBase]: 215/386 cut-off events. [2024-06-20 16:33:53,145 INFO L125 PetriNetUnfolderBase]: For 1971/1971 co-relation queries the response was YES. [2024-06-20 16:33:53,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1538 conditions, 386 events. 215/386 cut-off events. For 1971/1971 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1347 event pairs, 50 based on Foata normal form. 2/387 useless extension candidates. Maximal degree in co-relation 1511. Up to 339 conditions per place. [2024-06-20 16:33:53,148 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 50 selfloop transitions, 14 changer transitions 0/66 dead transitions. [2024-06-20 16:33:53,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 66 transitions, 497 flow [2024-06-20 16:33:53,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:33:53,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:33:53,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 79 transitions. [2024-06-20 16:33:53,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3640552995391705 [2024-06-20 16:33:53,149 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 313 flow. Second operand 7 states and 79 transitions. [2024-06-20 16:33:53,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 66 transitions, 497 flow [2024-06-20 16:33:53,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 66 transitions, 472 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-20 16:33:53,154 INFO L231 Difference]: Finished difference. Result has 61 places, 52 transitions, 347 flow [2024-06-20 16:33:53,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=347, PETRI_PLACES=61, PETRI_TRANSITIONS=52} [2024-06-20 16:33:53,154 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 31 predicate places. [2024-06-20 16:33:53,155 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 52 transitions, 347 flow [2024-06-20 16:33:53,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:53,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:53,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:53,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 16:33:53,155 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:33:53,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:53,156 INFO L85 PathProgramCache]: Analyzing trace with hash 589797070, now seen corresponding path program 2 times [2024-06-20 16:33:53,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:53,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25293873] [2024-06-20 16:33:53,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:53,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:53,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:53,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:53,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:53,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25293873] [2024-06-20 16:33:53,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25293873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:53,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:53,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:33:53,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750431952] [2024-06-20 16:33:53,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:53,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:33:53,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:53,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:33:53,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:33:53,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:53,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 52 transitions, 347 flow. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:53,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:53,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:53,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:54,147 INFO L124 PetriNetUnfolderBase]: 226/404 cut-off events. [2024-06-20 16:33:54,147 INFO L125 PetriNetUnfolderBase]: For 2519/2519 co-relation queries the response was YES. [2024-06-20 16:33:54,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1747 conditions, 404 events. 226/404 cut-off events. For 2519/2519 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1428 event pairs, 50 based on Foata normal form. 2/405 useless extension candidates. Maximal degree in co-relation 1717. Up to 339 conditions per place. [2024-06-20 16:33:54,150 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 48 selfloop transitions, 19 changer transitions 0/69 dead transitions. [2024-06-20 16:33:54,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 69 transitions, 567 flow [2024-06-20 16:33:54,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:33:54,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:33:54,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 80 transitions. [2024-06-20 16:33:54,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3686635944700461 [2024-06-20 16:33:54,152 INFO L175 Difference]: Start difference. First operand has 61 places, 52 transitions, 347 flow. Second operand 7 states and 80 transitions. [2024-06-20 16:33:54,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 69 transitions, 567 flow [2024-06-20 16:33:54,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 69 transitions, 548 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-20 16:33:54,156 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 404 flow [2024-06-20 16:33:54,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=404, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2024-06-20 16:33:54,156 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 35 predicate places. [2024-06-20 16:33:54,156 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 404 flow [2024-06-20 16:33:54,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:54,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:54,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:54,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 16:33:54,157 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:33:54,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:54,158 INFO L85 PathProgramCache]: Analyzing trace with hash 89491234, now seen corresponding path program 3 times [2024-06-20 16:33:54,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:54,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588771648] [2024-06-20 16:33:54,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:54,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:54,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:54,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:54,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588771648] [2024-06-20 16:33:54,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588771648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:54,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:54,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:33:54,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726907443] [2024-06-20 16:33:54,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:54,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:33:54,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:54,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:33:54,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:33:54,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:54,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 404 flow. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:54,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:54,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:54,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:55,164 INFO L124 PetriNetUnfolderBase]: 228/410 cut-off events. [2024-06-20 16:33:55,165 INFO L125 PetriNetUnfolderBase]: For 3143/3143 co-relation queries the response was YES. [2024-06-20 16:33:55,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1830 conditions, 410 events. 228/410 cut-off events. For 3143/3143 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1474 event pairs, 59 based on Foata normal form. 4/413 useless extension candidates. Maximal degree in co-relation 1799. Up to 288 conditions per place. [2024-06-20 16:33:55,168 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 47 selfloop transitions, 22 changer transitions 0/71 dead transitions. [2024-06-20 16:33:55,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 71 transitions, 626 flow [2024-06-20 16:33:55,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:33:55,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:33:55,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2024-06-20 16:33:55,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3778801843317972 [2024-06-20 16:33:55,170 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 404 flow. Second operand 7 states and 82 transitions. [2024-06-20 16:33:55,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 71 transitions, 626 flow [2024-06-20 16:33:55,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 71 transitions, 605 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-20 16:33:55,174 INFO L231 Difference]: Finished difference. Result has 69 places, 61 transitions, 473 flow [2024-06-20 16:33:55,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=473, PETRI_PLACES=69, PETRI_TRANSITIONS=61} [2024-06-20 16:33:55,175 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 39 predicate places. [2024-06-20 16:33:55,175 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 61 transitions, 473 flow [2024-06-20 16:33:55,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:55,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:55,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:55,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 16:33:55,176 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:33:55,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:55,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1623670800, now seen corresponding path program 1 times [2024-06-20 16:33:55,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:55,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497528527] [2024-06-20 16:33:55,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:55,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:55,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:55,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:55,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:55,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497528527] [2024-06-20 16:33:55,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497528527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:55,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:55,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:33:55,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822587381] [2024-06-20 16:33:55,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:55,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:33:55,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:55,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:33:55,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:33:56,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:56,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 61 transitions, 473 flow. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:56,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:56,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:56,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:56,148 INFO L124 PetriNetUnfolderBase]: 229/411 cut-off events. [2024-06-20 16:33:56,148 INFO L125 PetriNetUnfolderBase]: For 3403/3407 co-relation queries the response was YES. [2024-06-20 16:33:56,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1938 conditions, 411 events. 229/411 cut-off events. For 3403/3407 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1463 event pairs, 51 based on Foata normal form. 6/416 useless extension candidates. Maximal degree in co-relation 1905. Up to 340 conditions per place. [2024-06-20 16:33:56,151 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 47 selfloop transitions, 26 changer transitions 0/75 dead transitions. [2024-06-20 16:33:56,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 75 transitions, 695 flow [2024-06-20 16:33:56,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:33:56,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:33:56,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 88 transitions. [2024-06-20 16:33:56,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-20 16:33:56,153 INFO L175 Difference]: Start difference. First operand has 69 places, 61 transitions, 473 flow. Second operand 8 states and 88 transitions. [2024-06-20 16:33:56,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 75 transitions, 695 flow [2024-06-20 16:33:56,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 75 transitions, 665 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-20 16:33:56,159 INFO L231 Difference]: Finished difference. Result has 74 places, 66 transitions, 537 flow [2024-06-20 16:33:56,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=443, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=537, PETRI_PLACES=74, PETRI_TRANSITIONS=66} [2024-06-20 16:33:56,160 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 44 predicate places. [2024-06-20 16:33:56,160 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 66 transitions, 537 flow [2024-06-20 16:33:56,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:56,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:56,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:56,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 16:33:56,161 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:33:56,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:56,161 INFO L85 PathProgramCache]: Analyzing trace with hash -757234403, now seen corresponding path program 1 times [2024-06-20 16:33:56,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:56,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354780816] [2024-06-20 16:33:56,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:56,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:56,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:57,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:57,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:57,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354780816] [2024-06-20 16:33:57,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354780816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:57,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:57,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:33:57,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417076036] [2024-06-20 16:33:57,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:57,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:33:57,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:57,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:33:57,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:33:57,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:57,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 66 transitions, 537 flow. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:57,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:57,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:57,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:57,539 INFO L124 PetriNetUnfolderBase]: 227/407 cut-off events. [2024-06-20 16:33:57,539 INFO L125 PetriNetUnfolderBase]: For 3676/3676 co-relation queries the response was YES. [2024-06-20 16:33:57,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2012 conditions, 407 events. 227/407 cut-off events. For 3676/3676 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1431 event pairs, 48 based on Foata normal form. 1/407 useless extension candidates. Maximal degree in co-relation 1977. Up to 357 conditions per place. [2024-06-20 16:33:57,543 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 62 selfloop transitions, 15 changer transitions 0/79 dead transitions. [2024-06-20 16:33:57,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 79 transitions, 729 flow [2024-06-20 16:33:57,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:33:57,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:33:57,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 79 transitions. [2024-06-20 16:33:57,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3640552995391705 [2024-06-20 16:33:57,544 INFO L175 Difference]: Start difference. First operand has 74 places, 66 transitions, 537 flow. Second operand 7 states and 79 transitions. [2024-06-20 16:33:57,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 79 transitions, 729 flow [2024-06-20 16:33:57,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 79 transitions, 692 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 16:33:57,550 INFO L231 Difference]: Finished difference. Result has 77 places, 66 transitions, 538 flow [2024-06-20 16:33:57,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=538, PETRI_PLACES=77, PETRI_TRANSITIONS=66} [2024-06-20 16:33:57,551 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 47 predicate places. [2024-06-20 16:33:57,551 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 66 transitions, 538 flow [2024-06-20 16:33:57,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:57,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:57,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:57,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 16:33:57,552 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:33:57,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:57,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1414675588, now seen corresponding path program 1 times [2024-06-20 16:33:57,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:57,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559940433] [2024-06-20 16:33:57,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:57,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:58,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:58,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:58,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559940433] [2024-06-20 16:33:58,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559940433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:58,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:58,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:33:58,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90487519] [2024-06-20 16:33:58,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:58,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:33:58,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:58,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:33:58,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:33:58,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:58,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 66 transitions, 538 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) [2024-06-20 16:33:58,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:58,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:58,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:58,450 INFO L124 PetriNetUnfolderBase]: 233/419 cut-off events. [2024-06-20 16:33:58,451 INFO L125 PetriNetUnfolderBase]: For 4339/4343 co-relation queries the response was YES. [2024-06-20 16:33:58,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2106 conditions, 419 events. 233/419 cut-off events. For 4339/4343 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1512 event pairs, 53 based on Foata normal form. 6/424 useless extension candidates. Maximal degree in co-relation 2069. Up to 362 conditions per place. [2024-06-20 16:33:58,454 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 63 selfloop transitions, 15 changer transitions 0/80 dead transitions. [2024-06-20 16:33:58,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 80 transitions, 746 flow [2024-06-20 16:33:58,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:33:58,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:33:58,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2024-06-20 16:33:58,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35944700460829493 [2024-06-20 16:33:58,456 INFO L175 Difference]: Start difference. First operand has 77 places, 66 transitions, 538 flow. Second operand 7 states and 78 transitions. [2024-06-20 16:33:58,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 80 transitions, 746 flow [2024-06-20 16:33:58,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 80 transitions, 708 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-20 16:33:58,463 INFO L231 Difference]: Finished difference. Result has 78 places, 68 transitions, 555 flow [2024-06-20 16:33:58,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=555, PETRI_PLACES=78, PETRI_TRANSITIONS=68} [2024-06-20 16:33:58,463 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 48 predicate places. [2024-06-20 16:33:58,463 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 68 transitions, 555 flow [2024-06-20 16:33:58,464 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) [2024-06-20 16:33:58,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:58,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:58,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 16:33:58,464 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:33:58,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:58,465 INFO L85 PathProgramCache]: Analyzing trace with hash -171606738, now seen corresponding path program 2 times [2024-06-20 16:33:58,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:58,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118647120] [2024-06-20 16:33:58,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:58,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:59,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:59,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:59,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118647120] [2024-06-20 16:33:59,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118647120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:59,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:59,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:33:59,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275153322] [2024-06-20 16:33:59,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:59,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:33:59,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:59,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:33:59,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:33:59,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:33:59,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 68 transitions, 555 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) [2024-06-20 16:33:59,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:59,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:33:59,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:59,363 INFO L124 PetriNetUnfolderBase]: 244/437 cut-off events. [2024-06-20 16:33:59,363 INFO L125 PetriNetUnfolderBase]: For 5045/5045 co-relation queries the response was YES. [2024-06-20 16:33:59,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2251 conditions, 437 events. 244/437 cut-off events. For 5045/5045 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1600 event pairs, 59 based on Foata normal form. 2/438 useless extension candidates. Maximal degree in co-relation 2213. Up to 307 conditions per place. [2024-06-20 16:33:59,367 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 53 selfloop transitions, 29 changer transitions 0/84 dead transitions. [2024-06-20 16:33:59,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 84 transitions, 853 flow [2024-06-20 16:33:59,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:33:59,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:33:59,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2024-06-20 16:33:59,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3824884792626728 [2024-06-20 16:33:59,370 INFO L175 Difference]: Start difference. First operand has 78 places, 68 transitions, 555 flow. Second operand 7 states and 83 transitions. [2024-06-20 16:33:59,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 84 transitions, 853 flow [2024-06-20 16:33:59,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 84 transitions, 818 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 16:33:59,380 INFO L231 Difference]: Finished difference. Result has 80 places, 72 transitions, 624 flow [2024-06-20 16:33:59,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=73, 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=7, PETRI_FLOW=624, PETRI_PLACES=80, PETRI_TRANSITIONS=72} [2024-06-20 16:33:59,381 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 50 predicate places. [2024-06-20 16:33:59,381 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 72 transitions, 624 flow [2024-06-20 16:33:59,381 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) [2024-06-20 16:33:59,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:59,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:59,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 16:33:59,382 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:33:59,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:59,382 INFO L85 PathProgramCache]: Analyzing trace with hash -171601158, now seen corresponding path program 3 times [2024-06-20 16:33:59,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:59,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077129558] [2024-06-20 16:33:59,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:59,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:00,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:00,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:00,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077129558] [2024-06-20 16:34:00,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077129558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:00,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:00,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:34:00,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120706504] [2024-06-20 16:34:00,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:00,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:34:00,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:00,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:34:00,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:34:00,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:00,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 72 transitions, 624 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) [2024-06-20 16:34:00,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:00,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:00,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:00,225 INFO L124 PetriNetUnfolderBase]: 240/431 cut-off events. [2024-06-20 16:34:00,225 INFO L125 PetriNetUnfolderBase]: For 5407/5407 co-relation queries the response was YES. [2024-06-20 16:34:00,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2268 conditions, 431 events. 240/431 cut-off events. For 5407/5407 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1571 event pairs, 56 based on Foata normal form. 2/432 useless extension candidates. Maximal degree in co-relation 2229. Up to 304 conditions per place. [2024-06-20 16:34:00,230 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 48 selfloop transitions, 33 changer transitions 0/83 dead transitions. [2024-06-20 16:34:00,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 83 transitions, 850 flow [2024-06-20 16:34:00,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:34:00,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:34:00,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2024-06-20 16:34:00,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3824884792626728 [2024-06-20 16:34:00,232 INFO L175 Difference]: Start difference. First operand has 80 places, 72 transitions, 624 flow. Second operand 7 states and 83 transitions. [2024-06-20 16:34:00,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 83 transitions, 850 flow [2024-06-20 16:34:00,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 83 transitions, 802 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-20 16:34:00,241 INFO L231 Difference]: Finished difference. Result has 84 places, 72 transitions, 647 flow [2024-06-20 16:34:00,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=647, PETRI_PLACES=84, PETRI_TRANSITIONS=72} [2024-06-20 16:34:00,242 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 54 predicate places. [2024-06-20 16:34:00,242 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 72 transitions, 647 flow [2024-06-20 16:34:00,242 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) [2024-06-20 16:34:00,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:00,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:00,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 16:34:00,243 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:00,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:00,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1205821353, now seen corresponding path program 1 times [2024-06-20 16:34:00,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:00,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607033113] [2024-06-20 16:34:00,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:00,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:00,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:00,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:00,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:00,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607033113] [2024-06-20 16:34:00,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607033113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:00,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:00,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:34:00,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030325247] [2024-06-20 16:34:00,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:00,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:34:00,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:00,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:34:00,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:34:01,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:01,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 72 transitions, 647 flow. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:01,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:01,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:01,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:01,229 INFO L124 PetriNetUnfolderBase]: 243/435 cut-off events. [2024-06-20 16:34:01,229 INFO L125 PetriNetUnfolderBase]: For 5886/5890 co-relation queries the response was YES. [2024-06-20 16:34:01,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2333 conditions, 435 events. 243/435 cut-off events. For 5886/5890 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1586 event pairs, 53 based on Foata normal form. 5/439 useless extension candidates. Maximal degree in co-relation 2293. Up to 376 conditions per place. [2024-06-20 16:34:01,233 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 57 selfloop transitions, 24 changer transitions 0/83 dead transitions. [2024-06-20 16:34:01,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 83 transitions, 879 flow [2024-06-20 16:34:01,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:34:01,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:34:01,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 86 transitions. [2024-06-20 16:34:01,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3467741935483871 [2024-06-20 16:34:01,236 INFO L175 Difference]: Start difference. First operand has 84 places, 72 transitions, 647 flow. Second operand 8 states and 86 transitions. [2024-06-20 16:34:01,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 83 transitions, 879 flow [2024-06-20 16:34:01,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 83 transitions, 797 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 16:34:01,247 INFO L231 Difference]: Finished difference. Result has 86 places, 74 transitions, 632 flow [2024-06-20 16:34:01,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=565, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=632, PETRI_PLACES=86, PETRI_TRANSITIONS=74} [2024-06-20 16:34:01,248 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 56 predicate places. [2024-06-20 16:34:01,248 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 74 transitions, 632 flow [2024-06-20 16:34:01,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:01,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:01,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:01,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 16:34:01,249 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:01,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:01,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1987658813, now seen corresponding path program 2 times [2024-06-20 16:34:01,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:01,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152918020] [2024-06-20 16:34:01,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:01,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:01,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:01,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:01,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:01,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152918020] [2024-06-20 16:34:01,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152918020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:01,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:01,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:34:01,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707865435] [2024-06-20 16:34:01,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:01,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:34:01,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:01,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:34:01,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:34:01,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:01,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 74 transitions, 632 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) [2024-06-20 16:34:01,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:01,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:01,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:02,068 INFO L124 PetriNetUnfolderBase]: 241/432 cut-off events. [2024-06-20 16:34:02,068 INFO L125 PetriNetUnfolderBase]: For 6164/6168 co-relation queries the response was YES. [2024-06-20 16:34:02,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2304 conditions, 432 events. 241/432 cut-off events. For 6164/6168 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1580 event pairs, 53 based on Foata normal form. 5/436 useless extension candidates. Maximal degree in co-relation 2263. Up to 374 conditions per place. [2024-06-20 16:34:02,073 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 57 selfloop transitions, 22 changer transitions 0/81 dead transitions. [2024-06-20 16:34:02,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 81 transitions, 808 flow [2024-06-20 16:34:02,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:34:02,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:34:02,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 77 transitions. [2024-06-20 16:34:02,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-20 16:34:02,075 INFO L175 Difference]: Start difference. First operand has 86 places, 74 transitions, 632 flow. Second operand 7 states and 77 transitions. [2024-06-20 16:34:02,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 81 transitions, 808 flow [2024-06-20 16:34:02,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 81 transitions, 754 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 16:34:02,086 INFO L231 Difference]: Finished difference. Result has 87 places, 74 transitions, 627 flow [2024-06-20 16:34:02,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=627, PETRI_PLACES=87, PETRI_TRANSITIONS=74} [2024-06-20 16:34:02,086 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 57 predicate places. [2024-06-20 16:34:02,086 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 74 transitions, 627 flow [2024-06-20 16:34:02,087 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) [2024-06-20 16:34:02,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:02,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:02,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 16:34:02,087 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:02,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:02,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1987381983, now seen corresponding path program 1 times [2024-06-20 16:34:02,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:02,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644201910] [2024-06-20 16:34:02,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:02,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:02,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:02,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:02,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644201910] [2024-06-20 16:34:02,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644201910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:02,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:02,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:02,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999321437] [2024-06-20 16:34:02,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:02,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:02,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:02,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:02,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:03,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:03,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 74 transitions, 627 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:03,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:03,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:03,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:03,212 INFO L124 PetriNetUnfolderBase]: 242/434 cut-off events. [2024-06-20 16:34:03,212 INFO L125 PetriNetUnfolderBase]: For 6776/6780 co-relation queries the response was YES. [2024-06-20 16:34:03,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2317 conditions, 434 events. 242/434 cut-off events. For 6776/6780 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1579 event pairs, 51 based on Foata normal form. 6/439 useless extension candidates. Maximal degree in co-relation 2275. Up to 356 conditions per place. [2024-06-20 16:34:03,216 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 55 selfloop transitions, 30 changer transitions 0/87 dead transitions. [2024-06-20 16:34:03,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 87 transitions, 883 flow [2024-06-20 16:34:03,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:03,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:03,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2024-06-20 16:34:03,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34767025089605735 [2024-06-20 16:34:03,218 INFO L175 Difference]: Start difference. First operand has 87 places, 74 transitions, 627 flow. Second operand 9 states and 97 transitions. [2024-06-20 16:34:03,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 87 transitions, 883 flow [2024-06-20 16:34:03,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 87 transitions, 827 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-20 16:34:03,228 INFO L231 Difference]: Finished difference. Result has 90 places, 77 transitions, 667 flow [2024-06-20 16:34:03,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=571, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=667, PETRI_PLACES=90, PETRI_TRANSITIONS=77} [2024-06-20 16:34:03,229 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 60 predicate places. [2024-06-20 16:34:03,229 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 77 transitions, 667 flow [2024-06-20 16:34:03,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:03,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:03,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:03,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 16:34:03,230 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:03,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:03,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1999489361, now seen corresponding path program 1 times [2024-06-20 16:34:03,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:03,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411131486] [2024-06-20 16:34:03,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:03,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:03,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:04,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:04,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:04,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411131486] [2024-06-20 16:34:04,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411131486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:04,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:04,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:04,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118579616] [2024-06-20 16:34:04,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:04,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:04,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:04,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:04,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:04,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:04,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 77 transitions, 667 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:04,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:04,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:04,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:04,348 INFO L124 PetriNetUnfolderBase]: 246/441 cut-off events. [2024-06-20 16:34:04,348 INFO L125 PetriNetUnfolderBase]: For 7289/7289 co-relation queries the response was YES. [2024-06-20 16:34:04,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2438 conditions, 441 events. 246/441 cut-off events. For 7289/7289 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1613 event pairs, 27 based on Foata normal form. 2/442 useless extension candidates. Maximal degree in co-relation 2395. Up to 374 conditions per place. [2024-06-20 16:34:04,353 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 78 selfloop transitions, 13 changer transitions 0/93 dead transitions. [2024-06-20 16:34:04,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 93 transitions, 901 flow [2024-06-20 16:34:04,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:34:04,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:34:04,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 85 transitions. [2024-06-20 16:34:04,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34274193548387094 [2024-06-20 16:34:04,355 INFO L175 Difference]: Start difference. First operand has 90 places, 77 transitions, 667 flow. Second operand 8 states and 85 transitions. [2024-06-20 16:34:04,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 93 transitions, 901 flow [2024-06-20 16:34:04,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 93 transitions, 827 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 16:34:04,365 INFO L231 Difference]: Finished difference. Result has 91 places, 78 transitions, 637 flow [2024-06-20 16:34:04,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=637, PETRI_PLACES=91, PETRI_TRANSITIONS=78} [2024-06-20 16:34:04,365 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 61 predicate places. [2024-06-20 16:34:04,365 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 78 transitions, 637 flow [2024-06-20 16:34:04,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:04,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:04,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:04,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 16:34:04,366 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:04,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:04,367 INFO L85 PathProgramCache]: Analyzing trace with hash -258752179, now seen corresponding path program 2 times [2024-06-20 16:34:04,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:04,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89836915] [2024-06-20 16:34:04,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:04,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:04,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:05,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:05,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:05,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89836915] [2024-06-20 16:34:05,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89836915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:05,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:05,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:05,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180422571] [2024-06-20 16:34:05,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:05,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:05,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:05,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:05,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:05,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:05,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 78 transitions, 637 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:05,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:05,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:05,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:05,555 INFO L124 PetriNetUnfolderBase]: 250/449 cut-off events. [2024-06-20 16:34:05,556 INFO L125 PetriNetUnfolderBase]: For 8029/8029 co-relation queries the response was YES. [2024-06-20 16:34:05,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2470 conditions, 449 events. 250/449 cut-off events. For 8029/8029 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1664 event pairs, 45 based on Foata normal form. 2/450 useless extension candidates. Maximal degree in co-relation 2426. Up to 391 conditions per place. [2024-06-20 16:34:05,559 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 76 selfloop transitions, 16 changer transitions 0/94 dead transitions. [2024-06-20 16:34:05,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 94 transitions, 877 flow [2024-06-20 16:34:05,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:34:05,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:34:05,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2024-06-20 16:34:05,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35080645161290325 [2024-06-20 16:34:05,562 INFO L175 Difference]: Start difference. First operand has 91 places, 78 transitions, 637 flow. Second operand 8 states and 87 transitions. [2024-06-20 16:34:05,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 94 transitions, 877 flow [2024-06-20 16:34:05,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 94 transitions, 843 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 16:34:05,573 INFO L231 Difference]: Finished difference. Result has 93 places, 79 transitions, 656 flow [2024-06-20 16:34:05,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=656, PETRI_PLACES=93, PETRI_TRANSITIONS=79} [2024-06-20 16:34:05,574 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 63 predicate places. [2024-06-20 16:34:05,574 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 79 transitions, 656 flow [2024-06-20 16:34:05,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:05,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:05,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:05,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 16:34:05,574 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:05,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:05,575 INFO L85 PathProgramCache]: Analyzing trace with hash -256070865, now seen corresponding path program 1 times [2024-06-20 16:34:05,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:05,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567267582] [2024-06-20 16:34:05,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:05,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:05,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:06,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:06,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:06,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567267582] [2024-06-20 16:34:06,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567267582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:06,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:06,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:34:06,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312181016] [2024-06-20 16:34:06,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:06,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:34:06,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:06,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:34:06,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:34:06,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:06,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 79 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) [2024-06-20 16:34:06,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:06,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:06,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:06,624 INFO L124 PetriNetUnfolderBase]: 248/447 cut-off events. [2024-06-20 16:34:06,624 INFO L125 PetriNetUnfolderBase]: For 8487/8491 co-relation queries the response was YES. [2024-06-20 16:34:06,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2468 conditions, 447 events. 248/447 cut-off events. For 8487/8491 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1673 event pairs, 47 based on Foata normal form. 5/451 useless extension candidates. Maximal degree in co-relation 2423. Up to 385 conditions per place. [2024-06-20 16:34:06,628 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 71 selfloop transitions, 18 changer transitions 0/91 dead transitions. [2024-06-20 16:34:06,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 91 transitions, 870 flow [2024-06-20 16:34:06,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:34:06,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:34:06,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2024-06-20 16:34:06,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35944700460829493 [2024-06-20 16:34:06,630 INFO L175 Difference]: Start difference. First operand has 93 places, 79 transitions, 656 flow. Second operand 7 states and 78 transitions. [2024-06-20 16:34:06,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 91 transitions, 870 flow [2024-06-20 16:34:06,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 91 transitions, 825 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 16:34:06,641 INFO L231 Difference]: Finished difference. Result has 94 places, 79 transitions, 655 flow [2024-06-20 16:34:06,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=655, PETRI_PLACES=94, PETRI_TRANSITIONS=79} [2024-06-20 16:34:06,641 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 64 predicate places. [2024-06-20 16:34:06,641 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 79 transitions, 655 flow [2024-06-20 16:34:06,642 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) [2024-06-20 16:34:06,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:06,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:06,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 16:34:06,642 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:06,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:06,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1400521525, now seen corresponding path program 1 times [2024-06-20 16:34:06,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:06,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357057215] [2024-06-20 16:34:06,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:06,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:06,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:07,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:07,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:07,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357057215] [2024-06-20 16:34:07,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357057215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:07,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:07,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:34:07,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993465428] [2024-06-20 16:34:07,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:07,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:34:07,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:07,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:34:07,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:34:07,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:07,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 79 transitions, 655 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) [2024-06-20 16:34:07,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:07,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:07,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:07,617 INFO L124 PetriNetUnfolderBase]: 254/458 cut-off events. [2024-06-20 16:34:07,617 INFO L125 PetriNetUnfolderBase]: For 9351/9355 co-relation queries the response was YES. [2024-06-20 16:34:07,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2521 conditions, 458 events. 254/458 cut-off events. For 9351/9355 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1732 event pairs, 50 based on Foata normal form. 6/463 useless extension candidates. Maximal degree in co-relation 2475. Up to 393 conditions per place. [2024-06-20 16:34:07,621 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 76 selfloop transitions, 17 changer transitions 0/95 dead transitions. [2024-06-20 16:34:07,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 95 transitions, 897 flow [2024-06-20 16:34:07,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:34:07,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:34:07,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2024-06-20 16:34:07,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35080645161290325 [2024-06-20 16:34:07,623 INFO L175 Difference]: Start difference. First operand has 94 places, 79 transitions, 655 flow. Second operand 8 states and 87 transitions. [2024-06-20 16:34:07,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 95 transitions, 897 flow [2024-06-20 16:34:07,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 95 transitions, 829 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 16:34:07,637 INFO L231 Difference]: Finished difference. Result has 95 places, 81 transitions, 644 flow [2024-06-20 16:34:07,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=644, PETRI_PLACES=95, PETRI_TRANSITIONS=81} [2024-06-20 16:34:07,638 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 65 predicate places. [2024-06-20 16:34:07,638 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 81 transitions, 644 flow [2024-06-20 16:34:07,638 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) [2024-06-20 16:34:07,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:07,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:07,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 16:34:07,639 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:07,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:07,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1024660835, now seen corresponding path program 2 times [2024-06-20 16:34:07,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:07,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305031241] [2024-06-20 16:34:07,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:07,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:07,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:08,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:08,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:08,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305031241] [2024-06-20 16:34:08,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305031241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:08,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:08,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:34:08,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193816853] [2024-06-20 16:34:08,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:08,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:34:08,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:08,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:34:08,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:34:08,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:08,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 81 transitions, 644 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) [2024-06-20 16:34:08,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:08,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:08,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:08,514 INFO L124 PetriNetUnfolderBase]: 270/484 cut-off events. [2024-06-20 16:34:08,514 INFO L125 PetriNetUnfolderBase]: For 9918/9918 co-relation queries the response was YES. [2024-06-20 16:34:08,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2678 conditions, 484 events. 270/484 cut-off events. For 9918/9918 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1841 event pairs, 52 based on Foata normal form. 2/485 useless extension candidates. Maximal degree in co-relation 2631. Up to 300 conditions per place. [2024-06-20 16:34:08,519 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 56 selfloop transitions, 43 changer transitions 0/101 dead transitions. [2024-06-20 16:34:08,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 101 transitions, 1028 flow [2024-06-20 16:34:08,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:34:08,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:34:08,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 96 transitions. [2024-06-20 16:34:08,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-20 16:34:08,520 INFO L175 Difference]: Start difference. First operand has 95 places, 81 transitions, 644 flow. Second operand 8 states and 96 transitions. [2024-06-20 16:34:08,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 101 transitions, 1028 flow [2024-06-20 16:34:08,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 101 transitions, 987 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 16:34:08,534 INFO L231 Difference]: Finished difference. Result has 97 places, 87 transitions, 752 flow [2024-06-20 16:34:08,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=752, PETRI_PLACES=97, PETRI_TRANSITIONS=87} [2024-06-20 16:34:08,534 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 67 predicate places. [2024-06-20 16:34:08,534 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 87 transitions, 752 flow [2024-06-20 16:34:08,535 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) [2024-06-20 16:34:08,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:08,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:08,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 16:34:08,535 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:08,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:08,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1024845285, now seen corresponding path program 3 times [2024-06-20 16:34:08,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:08,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394935815] [2024-06-20 16:34:08,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:08,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:08,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:09,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:09,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:09,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394935815] [2024-06-20 16:34:09,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394935815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:09,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:09,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:34:09,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184747813] [2024-06-20 16:34:09,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:09,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:34:09,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:09,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:34:09,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:34:09,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:09,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 87 transitions, 752 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) [2024-06-20 16:34:09,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:09,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:09,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:09,704 INFO L124 PetriNetUnfolderBase]: 274/490 cut-off events. [2024-06-20 16:34:09,704 INFO L125 PetriNetUnfolderBase]: For 10843/10843 co-relation queries the response was YES. [2024-06-20 16:34:09,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2840 conditions, 490 events. 274/490 cut-off events. For 10843/10843 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1874 event pairs, 44 based on Foata normal form. 2/491 useless extension candidates. Maximal degree in co-relation 2792. Up to 420 conditions per place. [2024-06-20 16:34:09,709 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 80 selfloop transitions, 20 changer transitions 0/102 dead transitions. [2024-06-20 16:34:09,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 102 transitions, 1008 flow [2024-06-20 16:34:09,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:34:09,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:34:09,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2024-06-20 16:34:09,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35080645161290325 [2024-06-20 16:34:09,711 INFO L175 Difference]: Start difference. First operand has 97 places, 87 transitions, 752 flow. Second operand 8 states and 87 transitions. [2024-06-20 16:34:09,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 102 transitions, 1008 flow [2024-06-20 16:34:09,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 102 transitions, 963 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-20 16:34:09,727 INFO L231 Difference]: Finished difference. Result has 102 places, 88 transitions, 769 flow [2024-06-20 16:34:09,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=707, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=769, PETRI_PLACES=102, PETRI_TRANSITIONS=88} [2024-06-20 16:34:09,728 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 72 predicate places. [2024-06-20 16:34:09,728 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 88 transitions, 769 flow [2024-06-20 16:34:09,728 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) [2024-06-20 16:34:09,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:09,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:09,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 16:34:09,729 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:09,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:09,729 INFO L85 PathProgramCache]: Analyzing trace with hash -845267487, now seen corresponding path program 3 times [2024-06-20 16:34:09,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:09,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646292405] [2024-06-20 16:34:09,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:09,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:09,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:10,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:10,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:10,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646292405] [2024-06-20 16:34:10,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646292405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:10,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:10,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:34:10,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111819928] [2024-06-20 16:34:10,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:10,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:34:10,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:10,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:34:10,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:34:10,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:10,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 88 transitions, 769 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) [2024-06-20 16:34:10,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:10,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:10,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:10,603 INFO L124 PetriNetUnfolderBase]: 280/502 cut-off events. [2024-06-20 16:34:10,603 INFO L125 PetriNetUnfolderBase]: For 11820/11820 co-relation queries the response was YES. [2024-06-20 16:34:10,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2930 conditions, 502 events. 280/502 cut-off events. For 11820/11820 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1959 event pairs, 49 based on Foata normal form. 2/503 useless extension candidates. Maximal degree in co-relation 2880. Up to 314 conditions per place. [2024-06-20 16:34:10,608 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 60 selfloop transitions, 42 changer transitions 0/104 dead transitions. [2024-06-20 16:34:10,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 104 transitions, 1131 flow [2024-06-20 16:34:10,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:34:10,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:34:10,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 96 transitions. [2024-06-20 16:34:10,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-20 16:34:10,612 INFO L175 Difference]: Start difference. First operand has 102 places, 88 transitions, 769 flow. Second operand 8 states and 96 transitions. [2024-06-20 16:34:10,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 104 transitions, 1131 flow [2024-06-20 16:34:10,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 104 transitions, 1079 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 16:34:10,631 INFO L231 Difference]: Finished difference. Result has 104 places, 90 transitions, 824 flow [2024-06-20 16:34:10,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=824, PETRI_PLACES=104, PETRI_TRANSITIONS=90} [2024-06-20 16:34:10,632 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 74 predicate places. [2024-06-20 16:34:10,632 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 90 transitions, 824 flow [2024-06-20 16:34:10,632 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) [2024-06-20 16:34:10,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:10,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:10,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 16:34:10,633 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:10,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:10,634 INFO L85 PathProgramCache]: Analyzing trace with hash -428734409, now seen corresponding path program 4 times [2024-06-20 16:34:10,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:10,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456959957] [2024-06-20 16:34:10,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:10,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:10,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:11,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:11,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:11,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456959957] [2024-06-20 16:34:11,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456959957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:11,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:11,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:34:11,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498676821] [2024-06-20 16:34:11,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:11,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:34:11,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:11,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:34:11,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:34:11,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:11,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 90 transitions, 824 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) [2024-06-20 16:34:11,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:11,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:11,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:11,504 INFO L124 PetriNetUnfolderBase]: 281/504 cut-off events. [2024-06-20 16:34:11,504 INFO L125 PetriNetUnfolderBase]: For 12348/12348 co-relation queries the response was YES. [2024-06-20 16:34:11,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2997 conditions, 504 events. 281/504 cut-off events. For 12348/12348 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1970 event pairs, 60 based on Foata normal form. 2/505 useless extension candidates. Maximal degree in co-relation 2946. Up to 317 conditions per place. [2024-06-20 16:34:11,512 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 63 selfloop transitions, 41 changer transitions 0/106 dead transitions. [2024-06-20 16:34:11,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 106 transitions, 1198 flow [2024-06-20 16:34:11,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:34:11,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:34:11,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 94 transitions. [2024-06-20 16:34:11,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3790322580645161 [2024-06-20 16:34:11,514 INFO L175 Difference]: Start difference. First operand has 104 places, 90 transitions, 824 flow. Second operand 8 states and 94 transitions. [2024-06-20 16:34:11,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 106 transitions, 1198 flow [2024-06-20 16:34:11,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 106 transitions, 1125 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-20 16:34:11,533 INFO L231 Difference]: Finished difference. Result has 107 places, 92 transitions, 860 flow [2024-06-20 16:34:11,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=753, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=860, PETRI_PLACES=107, PETRI_TRANSITIONS=92} [2024-06-20 16:34:11,534 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 77 predicate places. [2024-06-20 16:34:11,534 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 92 transitions, 860 flow [2024-06-20 16:34:11,534 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) [2024-06-20 16:34:11,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:11,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:11,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 16:34:11,535 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:11,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:11,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1037884951, now seen corresponding path program 4 times [2024-06-20 16:34:11,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:11,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057892892] [2024-06-20 16:34:11,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:11,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:11,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:12,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:12,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:12,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057892892] [2024-06-20 16:34:12,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057892892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:12,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:12,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:34:12,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600755264] [2024-06-20 16:34:12,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:12,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:34:12,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:12,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:34:12,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:34:12,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:12,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 92 transitions, 860 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) [2024-06-20 16:34:12,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:12,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:12,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:12,682 INFO L124 PetriNetUnfolderBase]: 282/507 cut-off events. [2024-06-20 16:34:12,683 INFO L125 PetriNetUnfolderBase]: For 13246/13246 co-relation queries the response was YES. [2024-06-20 16:34:12,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2985 conditions, 507 events. 282/507 cut-off events. For 13246/13246 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1986 event pairs, 55 based on Foata normal form. 4/510 useless extension candidates. Maximal degree in co-relation 2933. Up to 369 conditions per place. [2024-06-20 16:34:12,688 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 72 selfloop transitions, 30 changer transitions 0/104 dead transitions. [2024-06-20 16:34:12,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 104 transitions, 1100 flow [2024-06-20 16:34:12,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:34:12,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:34:12,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 90 transitions. [2024-06-20 16:34:12,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3629032258064516 [2024-06-20 16:34:12,689 INFO L175 Difference]: Start difference. First operand has 107 places, 92 transitions, 860 flow. Second operand 8 states and 90 transitions. [2024-06-20 16:34:12,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 104 transitions, 1100 flow [2024-06-20 16:34:12,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 104 transitions, 1050 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-20 16:34:12,710 INFO L231 Difference]: Finished difference. Result has 111 places, 93 transitions, 883 flow [2024-06-20 16:34:12,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=883, PETRI_PLACES=111, PETRI_TRANSITIONS=93} [2024-06-20 16:34:12,711 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 81 predicate places. [2024-06-20 16:34:12,711 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 93 transitions, 883 flow [2024-06-20 16:34:12,711 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) [2024-06-20 16:34:12,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:12,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:12,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 16:34:12,712 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:12,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:12,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1265964041, now seen corresponding path program 5 times [2024-06-20 16:34:12,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:12,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744554619] [2024-06-20 16:34:12,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:12,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:12,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:13,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:13,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:13,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744554619] [2024-06-20 16:34:13,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744554619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:13,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:13,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:34:13,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243193538] [2024-06-20 16:34:13,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:13,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:34:13,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:13,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:34:13,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:34:13,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:13,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 93 transitions, 883 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) [2024-06-20 16:34:13,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:13,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:13,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:13,598 INFO L124 PetriNetUnfolderBase]: 288/517 cut-off events. [2024-06-20 16:34:13,598 INFO L125 PetriNetUnfolderBase]: For 13460/13460 co-relation queries the response was YES. [2024-06-20 16:34:13,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3052 conditions, 517 events. 288/517 cut-off events. For 13460/13460 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2038 event pairs, 61 based on Foata normal form. 2/518 useless extension candidates. Maximal degree in co-relation 2999. Up to 326 conditions per place. [2024-06-20 16:34:13,602 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 64 selfloop transitions, 42 changer transitions 0/108 dead transitions. [2024-06-20 16:34:13,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 108 transitions, 1265 flow [2024-06-20 16:34:13,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:34:13,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:34:13,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 95 transitions. [2024-06-20 16:34:13,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38306451612903225 [2024-06-20 16:34:13,603 INFO L175 Difference]: Start difference. First operand has 111 places, 93 transitions, 883 flow. Second operand 8 states and 95 transitions. [2024-06-20 16:34:13,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 108 transitions, 1265 flow [2024-06-20 16:34:13,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 108 transitions, 1176 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-20 16:34:13,622 INFO L231 Difference]: Finished difference. Result has 112 places, 95 transitions, 905 flow [2024-06-20 16:34:13,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=794, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=905, PETRI_PLACES=112, PETRI_TRANSITIONS=95} [2024-06-20 16:34:13,623 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 82 predicate places. [2024-06-20 16:34:13,623 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 95 transitions, 905 flow [2024-06-20 16:34:13,623 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) [2024-06-20 16:34:13,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:13,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:13,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 16:34:13,623 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:13,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:13,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1265970799, now seen corresponding path program 1 times [2024-06-20 16:34:13,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:13,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536694143] [2024-06-20 16:34:13,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:13,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:13,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:14,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:14,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:14,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536694143] [2024-06-20 16:34:14,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536694143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:14,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:14,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:34:14,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952805294] [2024-06-20 16:34:14,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:14,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:34:14,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:14,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:34:14,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:34:14,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:14,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 95 transitions, 905 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) [2024-06-20 16:34:14,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:14,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:14,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:14,397 INFO L124 PetriNetUnfolderBase]: 291/521 cut-off events. [2024-06-20 16:34:14,398 INFO L125 PetriNetUnfolderBase]: For 13866/13870 co-relation queries the response was YES. [2024-06-20 16:34:14,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3083 conditions, 521 events. 291/521 cut-off events. For 13866/13870 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2058 event pairs, 55 based on Foata normal form. 5/525 useless extension candidates. Maximal degree in co-relation 3030. Up to 448 conditions per place. [2024-06-20 16:34:14,402 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 77 selfloop transitions, 27 changer transitions 0/106 dead transitions. [2024-06-20 16:34:14,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 106 transitions, 1207 flow [2024-06-20 16:34:14,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:34:14,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:34:14,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 88 transitions. [2024-06-20 16:34:14,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-20 16:34:14,404 INFO L175 Difference]: Start difference. First operand has 112 places, 95 transitions, 905 flow. Second operand 8 states and 88 transitions. [2024-06-20 16:34:14,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 106 transitions, 1207 flow [2024-06-20 16:34:14,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 106 transitions, 1062 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-20 16:34:14,427 INFO L231 Difference]: Finished difference. Result has 112 places, 97 transitions, 833 flow [2024-06-20 16:34:14,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=760, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=833, PETRI_PLACES=112, PETRI_TRANSITIONS=97} [2024-06-20 16:34:14,428 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 82 predicate places. [2024-06-20 16:34:14,428 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 97 transitions, 833 flow [2024-06-20 16:34:14,428 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) [2024-06-20 16:34:14,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:14,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:14,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 16:34:14,429 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:14,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:14,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1265970551, now seen corresponding path program 6 times [2024-06-20 16:34:14,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:14,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872829398] [2024-06-20 16:34:14,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:14,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:14,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:15,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:15,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:15,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872829398] [2024-06-20 16:34:15,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872829398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:15,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:15,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:34:15,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775480575] [2024-06-20 16:34:15,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:15,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:34:15,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:15,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:34:15,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:34:15,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:15,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 97 transitions, 833 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) [2024-06-20 16:34:15,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:15,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:15,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:15,419 INFO L124 PetriNetUnfolderBase]: 297/532 cut-off events. [2024-06-20 16:34:15,419 INFO L125 PetriNetUnfolderBase]: For 14887/14887 co-relation queries the response was YES. [2024-06-20 16:34:15,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3033 conditions, 532 events. 297/532 cut-off events. For 14887/14887 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2117 event pairs, 61 based on Foata normal form. 2/533 useless extension candidates. Maximal degree in co-relation 2980. Up to 337 conditions per place. [2024-06-20 16:34:15,422 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 68 selfloop transitions, 43 changer transitions 0/113 dead transitions. [2024-06-20 16:34:15,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 113 transitions, 1233 flow [2024-06-20 16:34:15,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:34:15,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:34:15,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 96 transitions. [2024-06-20 16:34:15,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-20 16:34:15,423 INFO L175 Difference]: Start difference. First operand has 112 places, 97 transitions, 833 flow. Second operand 8 states and 96 transitions. [2024-06-20 16:34:15,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 113 transitions, 1233 flow [2024-06-20 16:34:15,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 113 transitions, 1167 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 16:34:15,441 INFO L231 Difference]: Finished difference. Result has 114 places, 99 transitions, 876 flow [2024-06-20 16:34:15,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=767, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=876, PETRI_PLACES=114, PETRI_TRANSITIONS=99} [2024-06-20 16:34:15,442 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 84 predicate places. [2024-06-20 16:34:15,442 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 99 transitions, 876 flow [2024-06-20 16:34:15,442 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) [2024-06-20 16:34:15,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:15,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:15,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 16:34:15,443 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:15,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:15,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1274244761, now seen corresponding path program 7 times [2024-06-20 16:34:15,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:15,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970179994] [2024-06-20 16:34:15,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:15,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:15,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:16,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:16,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:16,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970179994] [2024-06-20 16:34:16,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970179994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:16,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:16,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:16,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127428824] [2024-06-20 16:34:16,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:16,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:16,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:16,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:16,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:16,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:16,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 99 transitions, 876 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:16,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:16,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:16,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:16,434 INFO L124 PetriNetUnfolderBase]: 293/526 cut-off events. [2024-06-20 16:34:16,435 INFO L125 PetriNetUnfolderBase]: For 14916/14916 co-relation queries the response was YES. [2024-06-20 16:34:16,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3026 conditions, 526 events. 293/526 cut-off events. For 14916/14916 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2094 event pairs, 51 based on Foata normal form. 2/527 useless extension candidates. Maximal degree in co-relation 2972. Up to 334 conditions per place. [2024-06-20 16:34:16,438 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 60 selfloop transitions, 51 changer transitions 0/113 dead transitions. [2024-06-20 16:34:16,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 113 transitions, 1200 flow [2024-06-20 16:34:16,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:16,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:16,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 103 transitions. [2024-06-20 16:34:16,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36917562724014336 [2024-06-20 16:34:16,440 INFO L175 Difference]: Start difference. First operand has 114 places, 99 transitions, 876 flow. Second operand 9 states and 103 transitions. [2024-06-20 16:34:16,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 113 transitions, 1200 flow [2024-06-20 16:34:16,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 113 transitions, 1110 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 16:34:16,459 INFO L231 Difference]: Finished difference. Result has 118 places, 99 transitions, 893 flow [2024-06-20 16:34:16,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=893, PETRI_PLACES=118, PETRI_TRANSITIONS=99} [2024-06-20 16:34:16,460 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 88 predicate places. [2024-06-20 16:34:16,460 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 99 transitions, 893 flow [2024-06-20 16:34:16,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:16,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:16,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:16,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 16:34:16,461 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:16,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:16,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1274245009, now seen corresponding path program 2 times [2024-06-20 16:34:16,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:16,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106259351] [2024-06-20 16:34:16,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:16,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:17,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:17,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:17,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106259351] [2024-06-20 16:34:17,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106259351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:17,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:17,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:17,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567740063] [2024-06-20 16:34:17,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:17,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:17,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:17,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:17,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:17,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:17,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 99 transitions, 893 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:17,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:17,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:17,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:17,399 INFO L124 PetriNetUnfolderBase]: 296/530 cut-off events. [2024-06-20 16:34:17,400 INFO L125 PetriNetUnfolderBase]: For 15253/15257 co-relation queries the response was YES. [2024-06-20 16:34:17,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3091 conditions, 530 events. 296/530 cut-off events. For 15253/15257 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2104 event pairs, 54 based on Foata normal form. 5/534 useless extension candidates. Maximal degree in co-relation 3036. Up to 456 conditions per place. [2024-06-20 16:34:17,404 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 78 selfloop transitions, 31 changer transitions 0/111 dead transitions. [2024-06-20 16:34:17,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 111 transitions, 1213 flow [2024-06-20 16:34:17,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:17,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:17,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2024-06-20 16:34:17,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34767025089605735 [2024-06-20 16:34:17,405 INFO L175 Difference]: Start difference. First operand has 118 places, 99 transitions, 893 flow. Second operand 9 states and 97 transitions. [2024-06-20 16:34:17,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 111 transitions, 1213 flow [2024-06-20 16:34:17,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 111 transitions, 1091 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-20 16:34:17,426 INFO L231 Difference]: Finished difference. Result has 118 places, 101 transitions, 852 flow [2024-06-20 16:34:17,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=852, PETRI_PLACES=118, PETRI_TRANSITIONS=101} [2024-06-20 16:34:17,426 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 88 predicate places. [2024-06-20 16:34:17,426 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 101 transitions, 852 flow [2024-06-20 16:34:17,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:17,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:17,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:17,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 16:34:17,427 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:17,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:17,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1274541679, now seen corresponding path program 3 times [2024-06-20 16:34:17,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:17,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959436718] [2024-06-20 16:34:17,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:17,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:17,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:18,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:18,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:18,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959436718] [2024-06-20 16:34:18,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959436718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:18,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:18,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:18,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820494624] [2024-06-20 16:34:18,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:18,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:18,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:18,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:18,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:18,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:18,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 101 transitions, 852 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:18,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:18,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:18,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:18,453 INFO L124 PetriNetUnfolderBase]: 294/527 cut-off events. [2024-06-20 16:34:18,453 INFO L125 PetriNetUnfolderBase]: For 15452/15456 co-relation queries the response was YES. [2024-06-20 16:34:18,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2998 conditions, 527 events. 294/527 cut-off events. For 15452/15456 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2093 event pairs, 54 based on Foata normal form. 5/531 useless extension candidates. Maximal degree in co-relation 2942. Up to 454 conditions per place. [2024-06-20 16:34:18,456 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 77 selfloop transitions, 31 changer transitions 0/110 dead transitions. [2024-06-20 16:34:18,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 110 transitions, 1090 flow [2024-06-20 16:34:18,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:18,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:18,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 95 transitions. [2024-06-20 16:34:18,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34050179211469533 [2024-06-20 16:34:18,458 INFO L175 Difference]: Start difference. First operand has 118 places, 101 transitions, 852 flow. Second operand 9 states and 95 transitions. [2024-06-20 16:34:18,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 110 transitions, 1090 flow [2024-06-20 16:34:18,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 110 transitions, 1015 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 16:34:18,477 INFO L231 Difference]: Finished difference. Result has 120 places, 101 transitions, 844 flow [2024-06-20 16:34:18,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=844, PETRI_PLACES=120, PETRI_TRANSITIONS=101} [2024-06-20 16:34:18,478 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 90 predicate places. [2024-06-20 16:34:18,478 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 101 transitions, 844 flow [2024-06-20 16:34:18,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:18,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:18,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:18,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 16:34:18,478 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:18,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:18,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1479297979, now seen corresponding path program 1 times [2024-06-20 16:34:18,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:18,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233116540] [2024-06-20 16:34:18,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:18,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:18,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:19,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:19,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:19,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233116540] [2024-06-20 16:34:19,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233116540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:19,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:19,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:34:19,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375187384] [2024-06-20 16:34:19,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:19,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:34:19,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:19,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:34:19,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:34:19,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:19,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 101 transitions, 844 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:19,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:19,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:19,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:19,827 INFO L124 PetriNetUnfolderBase]: 332/610 cut-off events. [2024-06-20 16:34:19,827 INFO L125 PetriNetUnfolderBase]: For 24959/24959 co-relation queries the response was YES. [2024-06-20 16:34:19,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3282 conditions, 610 events. 332/610 cut-off events. For 24959/24959 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2552 event pairs, 55 based on Foata normal form. 16/625 useless extension candidates. Maximal degree in co-relation 3225. Up to 263 conditions per place. [2024-06-20 16:34:19,832 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 68 selfloop transitions, 61 changer transitions 0/131 dead transitions. [2024-06-20 16:34:19,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 131 transitions, 1440 flow [2024-06-20 16:34:19,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:34:19,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:34:19,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-20 16:34:19,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 16:34:19,833 INFO L175 Difference]: Start difference. First operand has 120 places, 101 transitions, 844 flow. Second operand 10 states and 124 transitions. [2024-06-20 16:34:19,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 131 transitions, 1440 flow [2024-06-20 16:34:19,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 131 transitions, 1373 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-20 16:34:19,853 INFO L231 Difference]: Finished difference. Result has 123 places, 109 transitions, 997 flow [2024-06-20 16:34:19,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=997, PETRI_PLACES=123, PETRI_TRANSITIONS=109} [2024-06-20 16:34:19,854 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 93 predicate places. [2024-06-20 16:34:19,854 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 109 transitions, 997 flow [2024-06-20 16:34:19,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:19,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:19,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:19,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 16:34:19,855 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:19,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:19,856 INFO L85 PathProgramCache]: Analyzing trace with hash 590399147, now seen corresponding path program 1 times [2024-06-20 16:34:19,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:19,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736632956] [2024-06-20 16:34:19,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:19,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:19,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:20,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:20,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:20,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736632956] [2024-06-20 16:34:20,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736632956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:20,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:20,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:20,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200606922] [2024-06-20 16:34:20,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:20,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:20,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:20,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:20,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:20,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:20,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 109 transitions, 997 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) [2024-06-20 16:34:20,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:20,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:20,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:21,004 INFO L124 PetriNetUnfolderBase]: 353/652 cut-off events. [2024-06-20 16:34:21,005 INFO L125 PetriNetUnfolderBase]: For 19106/19110 co-relation queries the response was YES. [2024-06-20 16:34:21,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3666 conditions, 652 events. 353/652 cut-off events. For 19106/19110 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2838 event pairs, 64 based on Foata normal form. 6/657 useless extension candidates. Maximal degree in co-relation 3607. Up to 575 conditions per place. [2024-06-20 16:34:21,010 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 114 selfloop transitions, 17 changer transitions 0/133 dead transitions. [2024-06-20 16:34:21,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 133 transitions, 1362 flow [2024-06-20 16:34:21,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:21,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:21,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 95 transitions. [2024-06-20 16:34:21,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34050179211469533 [2024-06-20 16:34:21,011 INFO L175 Difference]: Start difference. First operand has 123 places, 109 transitions, 997 flow. Second operand 9 states and 95 transitions. [2024-06-20 16:34:21,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 133 transitions, 1362 flow [2024-06-20 16:34:21,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 133 transitions, 1273 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-20 16:34:21,053 INFO L231 Difference]: Finished difference. Result has 131 places, 116 transitions, 1020 flow [2024-06-20 16:34:21,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1020, PETRI_PLACES=131, PETRI_TRANSITIONS=116} [2024-06-20 16:34:21,054 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 101 predicate places. [2024-06-20 16:34:21,054 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 116 transitions, 1020 flow [2024-06-20 16:34:21,054 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) [2024-06-20 16:34:21,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:21,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:21,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 16:34:21,055 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:21,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:21,055 INFO L85 PathProgramCache]: Analyzing trace with hash -548206885, now seen corresponding path program 2 times [2024-06-20 16:34:21,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:21,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841746004] [2024-06-20 16:34:21,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:21,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:21,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:21,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:21,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:21,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841746004] [2024-06-20 16:34:21,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841746004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:21,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:21,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:21,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782041034] [2024-06-20 16:34:21,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:21,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:21,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:21,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:21,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:21,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:21,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 116 transitions, 1020 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) [2024-06-20 16:34:21,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:21,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:21,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:22,089 INFO L124 PetriNetUnfolderBase]: 357/660 cut-off events. [2024-06-20 16:34:22,090 INFO L125 PetriNetUnfolderBase]: For 19870/19874 co-relation queries the response was YES. [2024-06-20 16:34:22,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3686 conditions, 660 events. 357/660 cut-off events. For 19870/19874 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2881 event pairs, 50 based on Foata normal form. 6/665 useless extension candidates. Maximal degree in co-relation 3622. Up to 549 conditions per place. [2024-06-20 16:34:22,094 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 109 selfloop transitions, 19 changer transitions 0/130 dead transitions. [2024-06-20 16:34:22,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 130 transitions, 1320 flow [2024-06-20 16:34:22,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:34:22,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:34:22,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 83 transitions. [2024-06-20 16:34:22,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3346774193548387 [2024-06-20 16:34:22,097 INFO L175 Difference]: Start difference. First operand has 131 places, 116 transitions, 1020 flow. Second operand 8 states and 83 transitions. [2024-06-20 16:34:22,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 130 transitions, 1320 flow [2024-06-20 16:34:22,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 130 transitions, 1286 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-20 16:34:22,143 INFO L231 Difference]: Finished difference. Result has 135 places, 117 transitions, 1042 flow [2024-06-20 16:34:22,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=986, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1042, PETRI_PLACES=135, PETRI_TRANSITIONS=117} [2024-06-20 16:34:22,144 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 105 predicate places. [2024-06-20 16:34:22,144 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 117 transitions, 1042 flow [2024-06-20 16:34:22,144 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) [2024-06-20 16:34:22,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:22,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:22,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 16:34:22,145 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:22,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:22,145 INFO L85 PathProgramCache]: Analyzing trace with hash -470221769, now seen corresponding path program 3 times [2024-06-20 16:34:22,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:22,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139585192] [2024-06-20 16:34:22,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:22,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:22,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:22,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:22,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:22,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139585192] [2024-06-20 16:34:22,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139585192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:22,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:22,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:22,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045411528] [2024-06-20 16:34:22,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:22,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:22,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:22,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:22,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:22,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:22,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 117 transitions, 1042 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) [2024-06-20 16:34:22,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:22,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:22,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:23,184 INFO L124 PetriNetUnfolderBase]: 368/681 cut-off events. [2024-06-20 16:34:23,185 INFO L125 PetriNetUnfolderBase]: For 22462/22466 co-relation queries the response was YES. [2024-06-20 16:34:23,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3904 conditions, 681 events. 368/681 cut-off events. For 22462/22466 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3024 event pairs, 75 based on Foata normal form. 6/686 useless extension candidates. Maximal degree in co-relation 3839. Up to 579 conditions per place. [2024-06-20 16:34:23,189 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 109 selfloop transitions, 22 changer transitions 0/133 dead transitions. [2024-06-20 16:34:23,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 133 transitions, 1442 flow [2024-06-20 16:34:23,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:34:23,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:34:23,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 88 transitions. [2024-06-20 16:34:23,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-20 16:34:23,197 INFO L175 Difference]: Start difference. First operand has 135 places, 117 transitions, 1042 flow. Second operand 8 states and 88 transitions. [2024-06-20 16:34:23,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 133 transitions, 1442 flow [2024-06-20 16:34:23,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 133 transitions, 1392 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 16:34:23,247 INFO L231 Difference]: Finished difference. Result has 137 places, 119 transitions, 1068 flow [2024-06-20 16:34:23,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=998, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1068, PETRI_PLACES=137, PETRI_TRANSITIONS=119} [2024-06-20 16:34:23,247 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 107 predicate places. [2024-06-20 16:34:23,248 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 119 transitions, 1068 flow [2024-06-20 16:34:23,248 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) [2024-06-20 16:34:23,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:23,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:23,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 16:34:23,248 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:23,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:23,249 INFO L85 PathProgramCache]: Analyzing trace with hash -470217894, now seen corresponding path program 1 times [2024-06-20 16:34:23,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:23,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131119546] [2024-06-20 16:34:23,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:23,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:23,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:24,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:24,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:24,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131119546] [2024-06-20 16:34:24,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131119546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:24,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:24,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:24,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215296172] [2024-06-20 16:34:24,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:24,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:24,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:24,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:24,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:24,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:24,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 119 transitions, 1068 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) [2024-06-20 16:34:24,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:24,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:24,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:24,349 INFO L124 PetriNetUnfolderBase]: 366/678 cut-off events. [2024-06-20 16:34:24,349 INFO L125 PetriNetUnfolderBase]: For 21142/21146 co-relation queries the response was YES. [2024-06-20 16:34:24,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3846 conditions, 678 events. 366/678 cut-off events. For 21142/21146 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3010 event pairs, 74 based on Foata normal form. 5/682 useless extension candidates. Maximal degree in co-relation 3780. Up to 592 conditions per place. [2024-06-20 16:34:24,354 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 105 selfloop transitions, 25 changer transitions 0/132 dead transitions. [2024-06-20 16:34:24,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 132 transitions, 1368 flow [2024-06-20 16:34:24,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:34:24,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:34:24,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2024-06-20 16:34:24,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35080645161290325 [2024-06-20 16:34:24,356 INFO L175 Difference]: Start difference. First operand has 137 places, 119 transitions, 1068 flow. Second operand 8 states and 87 transitions. [2024-06-20 16:34:24,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 132 transitions, 1368 flow [2024-06-20 16:34:24,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 132 transitions, 1326 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-20 16:34:24,410 INFO L231 Difference]: Finished difference. Result has 141 places, 119 transitions, 1084 flow [2024-06-20 16:34:24,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1026, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1084, PETRI_PLACES=141, PETRI_TRANSITIONS=119} [2024-06-20 16:34:24,410 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 111 predicate places. [2024-06-20 16:34:24,411 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 119 transitions, 1084 flow [2024-06-20 16:34:24,411 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) [2024-06-20 16:34:24,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:24,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:24,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 16:34:24,411 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:24,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:24,412 INFO L85 PathProgramCache]: Analyzing trace with hash -470218049, now seen corresponding path program 4 times [2024-06-20 16:34:24,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:24,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792807287] [2024-06-20 16:34:24,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:24,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:24,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:25,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:25,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:25,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792807287] [2024-06-20 16:34:25,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792807287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:25,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:25,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:25,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979304612] [2024-06-20 16:34:25,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:25,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:25,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:25,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:25,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:25,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:25,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 119 transitions, 1084 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) [2024-06-20 16:34:25,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:25,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:25,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:25,532 INFO L124 PetriNetUnfolderBase]: 363/673 cut-off events. [2024-06-20 16:34:25,532 INFO L125 PetriNetUnfolderBase]: For 21318/21322 co-relation queries the response was YES. [2024-06-20 16:34:25,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3803 conditions, 673 events. 363/673 cut-off events. For 21318/21322 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2984 event pairs, 73 based on Foata normal form. 6/678 useless extension candidates. Maximal degree in co-relation 3735. Up to 590 conditions per place. [2024-06-20 16:34:25,536 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 108 selfloop transitions, 22 changer transitions 0/132 dead transitions. [2024-06-20 16:34:25,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 132 transitions, 1382 flow [2024-06-20 16:34:25,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:34:25,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:34:25,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 86 transitions. [2024-06-20 16:34:25,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3467741935483871 [2024-06-20 16:34:25,537 INFO L175 Difference]: Start difference. First operand has 141 places, 119 transitions, 1084 flow. Second operand 8 states and 86 transitions. [2024-06-20 16:34:25,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 132 transitions, 1382 flow [2024-06-20 16:34:25,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 132 transitions, 1269 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-20 16:34:25,574 INFO L231 Difference]: Finished difference. Result has 140 places, 119 transitions, 1020 flow [2024-06-20 16:34:25,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=971, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1020, PETRI_PLACES=140, PETRI_TRANSITIONS=119} [2024-06-20 16:34:25,575 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 110 predicate places. [2024-06-20 16:34:25,575 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 119 transitions, 1020 flow [2024-06-20 16:34:25,575 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) [2024-06-20 16:34:25,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:25,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:25,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 16:34:25,576 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:25,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:25,577 INFO L85 PathProgramCache]: Analyzing trace with hash -466493027, now seen corresponding path program 1 times [2024-06-20 16:34:25,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:25,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225321363] [2024-06-20 16:34:25,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:25,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:25,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:26,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:26,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:26,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225321363] [2024-06-20 16:34:26,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225321363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:26,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:26,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:26,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371005132] [2024-06-20 16:34:26,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:26,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:26,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:26,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:26,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:26,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:26,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 119 transitions, 1020 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) [2024-06-20 16:34:26,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:26,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:26,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:26,450 INFO L124 PetriNetUnfolderBase]: 369/683 cut-off events. [2024-06-20 16:34:26,451 INFO L125 PetriNetUnfolderBase]: For 22209/22213 co-relation queries the response was YES. [2024-06-20 16:34:26,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3807 conditions, 683 events. 369/683 cut-off events. For 22209/22213 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3059 event pairs, 68 based on Foata normal form. 6/688 useless extension candidates. Maximal degree in co-relation 3738. Up to 600 conditions per place. [2024-06-20 16:34:26,454 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 113 selfloop transitions, 21 changer transitions 1/137 dead transitions. [2024-06-20 16:34:26,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 137 transitions, 1358 flow [2024-06-20 16:34:26,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:26,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:26,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-06-20 16:34:26,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34408602150537637 [2024-06-20 16:34:26,456 INFO L175 Difference]: Start difference. First operand has 140 places, 119 transitions, 1020 flow. Second operand 9 states and 96 transitions. [2024-06-20 16:34:26,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 137 transitions, 1358 flow [2024-06-20 16:34:26,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 137 transitions, 1311 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 16:34:26,493 INFO L231 Difference]: Finished difference. Result has 142 places, 120 transitions, 1033 flow [2024-06-20 16:34:26,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=973, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1033, PETRI_PLACES=142, PETRI_TRANSITIONS=120} [2024-06-20 16:34:26,494 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 112 predicate places. [2024-06-20 16:34:26,494 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 120 transitions, 1033 flow [2024-06-20 16:34:26,494 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) [2024-06-20 16:34:26,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:26,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:26,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 16:34:26,495 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:26,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:26,495 INFO L85 PathProgramCache]: Analyzing trace with hash -400291873, now seen corresponding path program 2 times [2024-06-20 16:34:26,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:26,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711755139] [2024-06-20 16:34:26,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:26,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:26,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:27,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:27,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:27,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711755139] [2024-06-20 16:34:27,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711755139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:27,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:27,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:27,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855549918] [2024-06-20 16:34:27,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:27,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:27,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:27,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:27,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:27,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:27,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 120 transitions, 1033 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) [2024-06-20 16:34:27,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:27,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:27,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:27,452 INFO L124 PetriNetUnfolderBase]: 377/699 cut-off events. [2024-06-20 16:34:27,452 INFO L125 PetriNetUnfolderBase]: For 25232/25236 co-relation queries the response was YES. [2024-06-20 16:34:27,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3914 conditions, 699 events. 377/699 cut-off events. For 25232/25236 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3138 event pairs, 71 based on Foata normal form. 5/703 useless extension candidates. Maximal degree in co-relation 3844. Up to 368 conditions per place. [2024-06-20 16:34:27,456 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 77 selfloop transitions, 63 changer transitions 1/143 dead transitions. [2024-06-20 16:34:27,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 143 transitions, 1602 flow [2024-06-20 16:34:27,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:27,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:27,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-06-20 16:34:27,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-06-20 16:34:27,458 INFO L175 Difference]: Start difference. First operand has 142 places, 120 transitions, 1033 flow. Second operand 9 states and 111 transitions. [2024-06-20 16:34:27,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 143 transitions, 1602 flow [2024-06-20 16:34:27,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 143 transitions, 1556 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 16:34:27,496 INFO L231 Difference]: Finished difference. Result has 144 places, 125 transitions, 1178 flow [2024-06-20 16:34:27,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=987, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1178, PETRI_PLACES=144, PETRI_TRANSITIONS=125} [2024-06-20 16:34:27,497 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 114 predicate places. [2024-06-20 16:34:27,497 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 125 transitions, 1178 flow [2024-06-20 16:34:27,497 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) [2024-06-20 16:34:27,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:27,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:27,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 16:34:27,498 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:27,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:27,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1181869863, now seen corresponding path program 3 times [2024-06-20 16:34:27,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:27,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077968563] [2024-06-20 16:34:27,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:27,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:27,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:28,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:28,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:28,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077968563] [2024-06-20 16:34:28,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077968563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:28,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:28,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:28,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66787567] [2024-06-20 16:34:28,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:28,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:28,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:28,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:28,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:28,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:28,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 125 transitions, 1178 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) [2024-06-20 16:34:28,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:28,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:28,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:28,400 INFO L124 PetriNetUnfolderBase]: 379/705 cut-off events. [2024-06-20 16:34:28,400 INFO L125 PetriNetUnfolderBase]: For 24758/24762 co-relation queries the response was YES. [2024-06-20 16:34:28,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4113 conditions, 705 events. 379/705 cut-off events. For 24758/24762 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3190 event pairs, 68 based on Foata normal form. 3/707 useless extension candidates. Maximal degree in co-relation 4042. Up to 370 conditions per place. [2024-06-20 16:34:28,404 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 81 selfloop transitions, 60 changer transitions 1/144 dead transitions. [2024-06-20 16:34:28,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 144 transitions, 1717 flow [2024-06-20 16:34:28,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:28,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:28,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 110 transitions. [2024-06-20 16:34:28,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3942652329749104 [2024-06-20 16:34:28,405 INFO L175 Difference]: Start difference. First operand has 144 places, 125 transitions, 1178 flow. Second operand 9 states and 110 transitions. [2024-06-20 16:34:28,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 144 transitions, 1717 flow [2024-06-20 16:34:28,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 144 transitions, 1648 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-20 16:34:28,448 INFO L231 Difference]: Finished difference. Result has 149 places, 126 transitions, 1249 flow [2024-06-20 16:34:28,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1109, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1249, PETRI_PLACES=149, PETRI_TRANSITIONS=126} [2024-06-20 16:34:28,449 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 119 predicate places. [2024-06-20 16:34:28,449 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 126 transitions, 1249 flow [2024-06-20 16:34:28,449 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) [2024-06-20 16:34:28,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:28,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:28,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 16:34:28,450 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:28,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:28,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1813475459, now seen corresponding path program 5 times [2024-06-20 16:34:28,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:28,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817426518] [2024-06-20 16:34:28,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:28,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:28,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:29,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:29,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:29,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817426518] [2024-06-20 16:34:29,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817426518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:29,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:29,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:29,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756351383] [2024-06-20 16:34:29,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:29,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:29,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:29,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:29,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:29,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:29,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 126 transitions, 1249 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) [2024-06-20 16:34:29,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:29,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:29,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:29,514 INFO L124 PetriNetUnfolderBase]: 379/709 cut-off events. [2024-06-20 16:34:29,514 INFO L125 PetriNetUnfolderBase]: For 26330/26334 co-relation queries the response was YES. [2024-06-20 16:34:29,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4251 conditions, 709 events. 379/709 cut-off events. For 26330/26334 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3252 event pairs, 70 based on Foata normal form. 3/711 useless extension candidates. Maximal degree in co-relation 4178. Up to 565 conditions per place. [2024-06-20 16:34:29,518 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 100 selfloop transitions, 37 changer transitions 0/139 dead transitions. [2024-06-20 16:34:29,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 139 transitions, 1571 flow [2024-06-20 16:34:29,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:34:29,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:34:29,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 90 transitions. [2024-06-20 16:34:29,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3629032258064516 [2024-06-20 16:34:29,519 INFO L175 Difference]: Start difference. First operand has 149 places, 126 transitions, 1249 flow. Second operand 8 states and 90 transitions. [2024-06-20 16:34:29,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 139 transitions, 1571 flow [2024-06-20 16:34:29,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 139 transitions, 1465 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 16:34:29,570 INFO L231 Difference]: Finished difference. Result has 151 places, 127 transitions, 1235 flow [2024-06-20 16:34:29,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1143, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1235, PETRI_PLACES=151, PETRI_TRANSITIONS=127} [2024-06-20 16:34:29,571 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 121 predicate places. [2024-06-20 16:34:29,571 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 127 transitions, 1235 flow [2024-06-20 16:34:29,571 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) [2024-06-20 16:34:29,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:29,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:29,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 16:34:29,572 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:29,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:29,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1813481411, now seen corresponding path program 4 times [2024-06-20 16:34:29,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:29,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3792675] [2024-06-20 16:34:29,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:29,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:29,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:30,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:30,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:30,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3792675] [2024-06-20 16:34:30,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3792675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:30,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:30,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:30,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225659978] [2024-06-20 16:34:30,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:30,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:30,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:30,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:30,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:30,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:30,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 127 transitions, 1235 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) [2024-06-20 16:34:30,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:30,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:30,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:30,559 INFO L124 PetriNetUnfolderBase]: 385/719 cut-off events. [2024-06-20 16:34:30,559 INFO L125 PetriNetUnfolderBase]: For 27417/27421 co-relation queries the response was YES. [2024-06-20 16:34:30,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4292 conditions, 719 events. 385/719 cut-off events. For 27417/27421 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3302 event pairs, 67 based on Foata normal form. 3/721 useless extension candidates. Maximal degree in co-relation 4218. Up to 380 conditions per place. [2024-06-20 16:34:30,567 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 85 selfloop transitions, 58 changer transitions 1/146 dead transitions. [2024-06-20 16:34:30,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 146 transitions, 1789 flow [2024-06-20 16:34:30,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:30,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:30,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 110 transitions. [2024-06-20 16:34:30,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3942652329749104 [2024-06-20 16:34:30,569 INFO L175 Difference]: Start difference. First operand has 151 places, 127 transitions, 1235 flow. Second operand 9 states and 110 transitions. [2024-06-20 16:34:30,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 146 transitions, 1789 flow [2024-06-20 16:34:30,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 146 transitions, 1707 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 16:34:30,640 INFO L231 Difference]: Finished difference. Result has 154 places, 128 transitions, 1290 flow [2024-06-20 16:34:30,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1153, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1290, PETRI_PLACES=154, PETRI_TRANSITIONS=128} [2024-06-20 16:34:30,640 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 124 predicate places. [2024-06-20 16:34:30,641 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 128 transitions, 1290 flow [2024-06-20 16:34:30,641 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) [2024-06-20 16:34:30,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:30,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:30,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 16:34:30,641 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:30,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:30,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1187584155, now seen corresponding path program 6 times [2024-06-20 16:34:30,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:30,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200551908] [2024-06-20 16:34:30,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:30,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:30,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:31,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:31,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:31,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200551908] [2024-06-20 16:34:31,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200551908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:31,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:31,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:31,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787352319] [2024-06-20 16:34:31,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:31,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:31,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:31,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:31,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:31,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:31,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 128 transitions, 1290 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) [2024-06-20 16:34:31,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:31,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:31,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:31,728 INFO L124 PetriNetUnfolderBase]: 385/723 cut-off events. [2024-06-20 16:34:31,729 INFO L125 PetriNetUnfolderBase]: For 28795/28799 co-relation queries the response was YES. [2024-06-20 16:34:31,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4373 conditions, 723 events. 385/723 cut-off events. For 28795/28799 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3345 event pairs, 70 based on Foata normal form. 3/725 useless extension candidates. Maximal degree in co-relation 4298. Up to 579 conditions per place. [2024-06-20 16:34:31,733 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 106 selfloop transitions, 33 changer transitions 0/141 dead transitions. [2024-06-20 16:34:31,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 141 transitions, 1618 flow [2024-06-20 16:34:31,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:34:31,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:34:31,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2024-06-20 16:34:31,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3588709677419355 [2024-06-20 16:34:31,734 INFO L175 Difference]: Start difference. First operand has 154 places, 128 transitions, 1290 flow. Second operand 8 states and 89 transitions. [2024-06-20 16:34:31,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 141 transitions, 1618 flow [2024-06-20 16:34:31,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 141 transitions, 1523 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 16:34:31,788 INFO L231 Difference]: Finished difference. Result has 156 places, 129 transitions, 1281 flow [2024-06-20 16:34:31,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1195, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1281, PETRI_PLACES=156, PETRI_TRANSITIONS=129} [2024-06-20 16:34:31,789 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 126 predicate places. [2024-06-20 16:34:31,789 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 129 transitions, 1281 flow [2024-06-20 16:34:31,789 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) [2024-06-20 16:34:31,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:31,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:31,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 16:34:31,789 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:31,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:31,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1187434053, now seen corresponding path program 5 times [2024-06-20 16:34:31,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:31,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915156755] [2024-06-20 16:34:31,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:31,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:31,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:32,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:32,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:32,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915156755] [2024-06-20 16:34:32,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915156755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:32,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:32,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:32,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235039964] [2024-06-20 16:34:32,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:32,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:32,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:32,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:32,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:32,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:32,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 129 transitions, 1281 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) [2024-06-20 16:34:32,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:32,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:32,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:32,646 INFO L124 PetriNetUnfolderBase]: 394/736 cut-off events. [2024-06-20 16:34:32,646 INFO L125 PetriNetUnfolderBase]: For 30982/30986 co-relation queries the response was YES. [2024-06-20 16:34:32,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4490 conditions, 736 events. 394/736 cut-off events. For 30982/30986 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3414 event pairs, 77 based on Foata normal form. 3/738 useless extension candidates. Maximal degree in co-relation 4414. Up to 395 conditions per place. [2024-06-20 16:34:32,651 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 86 selfloop transitions, 61 changer transitions 1/150 dead transitions. [2024-06-20 16:34:32,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 150 transitions, 1878 flow [2024-06-20 16:34:32,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:32,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:32,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 107 transitions. [2024-06-20 16:34:32,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835125448028674 [2024-06-20 16:34:32,652 INFO L175 Difference]: Start difference. First operand has 156 places, 129 transitions, 1281 flow. Second operand 9 states and 107 transitions. [2024-06-20 16:34:32,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 150 transitions, 1878 flow [2024-06-20 16:34:32,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 150 transitions, 1802 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 16:34:32,719 INFO L231 Difference]: Finished difference. Result has 160 places, 133 transitions, 1423 flow [2024-06-20 16:34:32,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1205, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1423, PETRI_PLACES=160, PETRI_TRANSITIONS=133} [2024-06-20 16:34:32,720 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 130 predicate places. [2024-06-20 16:34:32,720 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 133 transitions, 1423 flow [2024-06-20 16:34:32,720 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) [2024-06-20 16:34:32,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:32,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:32,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 16:34:32,720 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:32,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:32,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1187587875, now seen corresponding path program 7 times [2024-06-20 16:34:32,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:32,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211755382] [2024-06-20 16:34:32,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:32,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:32,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:33,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:33,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:33,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211755382] [2024-06-20 16:34:33,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211755382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:33,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:33,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:34:33,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154373423] [2024-06-20 16:34:33,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:33,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:34:33,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:33,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:34:33,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:34:33,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:33,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 133 transitions, 1423 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) [2024-06-20 16:34:33,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:33,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:33,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:33,653 INFO L124 PetriNetUnfolderBase]: 380/714 cut-off events. [2024-06-20 16:34:33,653 INFO L125 PetriNetUnfolderBase]: For 30333/30337 co-relation queries the response was YES. [2024-06-20 16:34:33,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4459 conditions, 714 events. 380/714 cut-off events. For 30333/30337 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3299 event pairs, 71 based on Foata normal form. 3/716 useless extension candidates. Maximal degree in co-relation 4381. Up to 534 conditions per place. [2024-06-20 16:34:33,658 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 107 selfloop transitions, 36 changer transitions 0/145 dead transitions. [2024-06-20 16:34:33,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 145 transitions, 1743 flow [2024-06-20 16:34:33,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:34:33,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:34:33,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2024-06-20 16:34:33,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3588709677419355 [2024-06-20 16:34:33,659 INFO L175 Difference]: Start difference. First operand has 160 places, 133 transitions, 1423 flow. Second operand 8 states and 89 transitions. [2024-06-20 16:34:33,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 145 transitions, 1743 flow [2024-06-20 16:34:33,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 145 transitions, 1679 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-20 16:34:33,717 INFO L231 Difference]: Finished difference. Result has 163 places, 133 transitions, 1436 flow [2024-06-20 16:34:33,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1359, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1436, PETRI_PLACES=163, PETRI_TRANSITIONS=133} [2024-06-20 16:34:33,717 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 133 predicate places. [2024-06-20 16:34:33,717 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 133 transitions, 1436 flow [2024-06-20 16:34:33,718 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) [2024-06-20 16:34:33,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:33,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:33,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 16:34:33,718 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:33,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:33,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1120159145, now seen corresponding path program 6 times [2024-06-20 16:34:33,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:33,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60316488] [2024-06-20 16:34:33,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:33,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:33,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:34,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:34,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:34,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60316488] [2024-06-20 16:34:34,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60316488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:34,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:34,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:34,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010584434] [2024-06-20 16:34:34,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:34,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:34,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:34,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:34,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:34,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:34,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 133 transitions, 1436 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) [2024-06-20 16:34:34,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:34,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:34,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:34,585 INFO L124 PetriNetUnfolderBase]: 386/724 cut-off events. [2024-06-20 16:34:34,586 INFO L125 PetriNetUnfolderBase]: For 31702/31706 co-relation queries the response was YES. [2024-06-20 16:34:34,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4509 conditions, 724 events. 386/724 cut-off events. For 31702/31706 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3351 event pairs, 79 based on Foata normal form. 3/726 useless extension candidates. Maximal degree in co-relation 4430. Up to 382 conditions per place. [2024-06-20 16:34:34,590 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 88 selfloop transitions, 62 changer transitions 0/152 dead transitions. [2024-06-20 16:34:34,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 152 transitions, 2098 flow [2024-06-20 16:34:34,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:34,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:34,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 113 transitions. [2024-06-20 16:34:34,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4050179211469534 [2024-06-20 16:34:34,591 INFO L175 Difference]: Start difference. First operand has 163 places, 133 transitions, 1436 flow. Second operand 9 states and 113 transitions. [2024-06-20 16:34:34,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 152 transitions, 2098 flow [2024-06-20 16:34:34,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 152 transitions, 2005 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-20 16:34:34,665 INFO L231 Difference]: Finished difference. Result has 165 places, 135 transitions, 1496 flow [2024-06-20 16:34:34,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1343, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1496, PETRI_PLACES=165, PETRI_TRANSITIONS=135} [2024-06-20 16:34:34,666 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 135 predicate places. [2024-06-20 16:34:34,666 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 135 transitions, 1496 flow [2024-06-20 16:34:34,666 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) [2024-06-20 16:34:34,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:34,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:34,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 16:34:34,666 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:34,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:34,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1120360955, now seen corresponding path program 7 times [2024-06-20 16:34:34,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:34,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694806463] [2024-06-20 16:34:34,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:34,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:34,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:35,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:35,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:35,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694806463] [2024-06-20 16:34:35,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694806463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:35,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:35,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:35,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892201519] [2024-06-20 16:34:35,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:35,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:35,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:35,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:35,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:35,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:35,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 135 transitions, 1496 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) [2024-06-20 16:34:35,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:35,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:35,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:35,557 INFO L124 PetriNetUnfolderBase]: 427/790 cut-off events. [2024-06-20 16:34:35,557 INFO L125 PetriNetUnfolderBase]: For 41970/41974 co-relation queries the response was YES. [2024-06-20 16:34:35,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5258 conditions, 790 events. 427/790 cut-off events. For 41970/41974 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3693 event pairs, 85 based on Foata normal form. 3/792 useless extension candidates. Maximal degree in co-relation 5179. Up to 408 conditions per place. [2024-06-20 16:34:35,562 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 95 selfloop transitions, 65 changer transitions 0/162 dead transitions. [2024-06-20 16:34:35,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 162 transitions, 2397 flow [2024-06-20 16:34:35,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:35,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:35,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-06-20 16:34:35,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121863799283154 [2024-06-20 16:34:35,564 INFO L175 Difference]: Start difference. First operand has 165 places, 135 transitions, 1496 flow. Second operand 9 states and 115 transitions. [2024-06-20 16:34:35,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 162 transitions, 2397 flow [2024-06-20 16:34:35,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 162 transitions, 2165 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-20 16:34:35,658 INFO L231 Difference]: Finished difference. Result has 166 places, 144 transitions, 1551 flow [2024-06-20 16:34:35,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1293, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1551, PETRI_PLACES=166, PETRI_TRANSITIONS=144} [2024-06-20 16:34:35,659 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 136 predicate places. [2024-06-20 16:34:35,659 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 144 transitions, 1551 flow [2024-06-20 16:34:35,659 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) [2024-06-20 16:34:35,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:35,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:35,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 16:34:35,660 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:35,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:35,660 INFO L85 PathProgramCache]: Analyzing trace with hash 590390145, now seen corresponding path program 8 times [2024-06-20 16:34:35,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:35,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237884851] [2024-06-20 16:34:35,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:35,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:35,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:36,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:36,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:36,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237884851] [2024-06-20 16:34:36,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237884851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:36,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:36,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:36,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408408240] [2024-06-20 16:34:36,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:36,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:36,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:36,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:36,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:36,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:36,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 144 transitions, 1551 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) [2024-06-20 16:34:36,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:36,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:36,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:36,563 INFO L124 PetriNetUnfolderBase]: 421/782 cut-off events. [2024-06-20 16:34:36,563 INFO L125 PetriNetUnfolderBase]: For 40593/40597 co-relation queries the response was YES. [2024-06-20 16:34:36,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4952 conditions, 782 events. 421/782 cut-off events. For 40593/40597 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3675 event pairs, 83 based on Foata normal form. 5/786 useless extension candidates. Maximal degree in co-relation 4873. Up to 407 conditions per place. [2024-06-20 16:34:36,568 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 94 selfloop transitions, 65 changer transitions 0/161 dead transitions. [2024-06-20 16:34:36,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 161 transitions, 2219 flow [2024-06-20 16:34:36,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:36,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:36,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 113 transitions. [2024-06-20 16:34:36,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4050179211469534 [2024-06-20 16:34:36,570 INFO L175 Difference]: Start difference. First operand has 166 places, 144 transitions, 1551 flow. Second operand 9 states and 113 transitions. [2024-06-20 16:34:36,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 161 transitions, 2219 flow [2024-06-20 16:34:36,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 161 transitions, 2104 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 16:34:36,641 INFO L231 Difference]: Finished difference. Result has 171 places, 144 transitions, 1574 flow [2024-06-20 16:34:36,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1436, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1574, PETRI_PLACES=171, PETRI_TRANSITIONS=144} [2024-06-20 16:34:36,642 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 141 predicate places. [2024-06-20 16:34:36,642 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 144 transitions, 1574 flow [2024-06-20 16:34:36,642 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) [2024-06-20 16:34:36,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:36,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:36,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 16:34:36,643 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:36,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:36,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1376868905, now seen corresponding path program 9 times [2024-06-20 16:34:36,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:36,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218827087] [2024-06-20 16:34:36,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:36,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:36,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:37,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:37,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:37,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218827087] [2024-06-20 16:34:37,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218827087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:37,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:37,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:34:37,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112675958] [2024-06-20 16:34:37,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:37,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:34:37,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:37,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:34:37,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:34:37,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:37,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 144 transitions, 1574 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:37,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:37,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:37,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:37,688 INFO L124 PetriNetUnfolderBase]: 460/846 cut-off events. [2024-06-20 16:34:37,688 INFO L125 PetriNetUnfolderBase]: For 49399/49403 co-relation queries the response was YES. [2024-06-20 16:34:37,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5602 conditions, 846 events. 460/846 cut-off events. For 49399/49403 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4009 event pairs, 80 based on Foata normal form. 5/850 useless extension candidates. Maximal degree in co-relation 5522. Up to 433 conditions per place. [2024-06-20 16:34:37,695 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 93 selfloop transitions, 78 changer transitions 0/173 dead transitions. [2024-06-20 16:34:37,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 173 transitions, 2514 flow [2024-06-20 16:34:37,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:34:37,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:34:37,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 126 transitions. [2024-06-20 16:34:37,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4064516129032258 [2024-06-20 16:34:37,696 INFO L175 Difference]: Start difference. First operand has 171 places, 144 transitions, 1574 flow. Second operand 10 states and 126 transitions. [2024-06-20 16:34:37,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 173 transitions, 2514 flow [2024-06-20 16:34:37,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 173 transitions, 2371 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 16:34:37,779 INFO L231 Difference]: Finished difference. Result has 175 places, 152 transitions, 1729 flow [2024-06-20 16:34:37,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1443, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1729, PETRI_PLACES=175, PETRI_TRANSITIONS=152} [2024-06-20 16:34:37,780 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 145 predicate places. [2024-06-20 16:34:37,780 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 152 transitions, 1729 flow [2024-06-20 16:34:37,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:37,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:37,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:37,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 16:34:37,780 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:37,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:37,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1120368674, now seen corresponding path program 1 times [2024-06-20 16:34:37,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:37,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217444748] [2024-06-20 16:34:37,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:37,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:37,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:38,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:38,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:38,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217444748] [2024-06-20 16:34:38,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217444748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:38,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:38,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:38,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649996818] [2024-06-20 16:34:38,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:38,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:38,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:38,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:38,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:38,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:38,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 152 transitions, 1729 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) [2024-06-20 16:34:38,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:38,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:38,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:38,803 INFO L124 PetriNetUnfolderBase]: 452/833 cut-off events. [2024-06-20 16:34:38,803 INFO L125 PetriNetUnfolderBase]: For 45680/45684 co-relation queries the response was YES. [2024-06-20 16:34:38,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5481 conditions, 833 events. 452/833 cut-off events. For 45680/45684 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3954 event pairs, 87 based on Foata normal form. 4/836 useless extension candidates. Maximal degree in co-relation 5399. Up to 506 conditions per place. [2024-06-20 16:34:38,811 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 103 selfloop transitions, 63 changer transitions 0/168 dead transitions. [2024-06-20 16:34:38,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 168 transitions, 2317 flow [2024-06-20 16:34:38,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:38,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:38,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-06-20 16:34:38,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3906810035842294 [2024-06-20 16:34:38,812 INFO L175 Difference]: Start difference. First operand has 175 places, 152 transitions, 1729 flow. Second operand 9 states and 109 transitions. [2024-06-20 16:34:38,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 168 transitions, 2317 flow [2024-06-20 16:34:38,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 168 transitions, 2140 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-20 16:34:38,907 INFO L231 Difference]: Finished difference. Result has 178 places, 152 transitions, 1687 flow [2024-06-20 16:34:38,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1552, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1687, PETRI_PLACES=178, PETRI_TRANSITIONS=152} [2024-06-20 16:34:38,908 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 148 predicate places. [2024-06-20 16:34:38,908 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 152 transitions, 1687 flow [2024-06-20 16:34:38,909 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) [2024-06-20 16:34:38,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:38,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:38,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 16:34:38,909 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:38,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:38,909 INFO L85 PathProgramCache]: Analyzing trace with hash 856087425, now seen corresponding path program 10 times [2024-06-20 16:34:38,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:38,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637442165] [2024-06-20 16:34:38,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:38,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:38,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:39,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:39,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:39,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637442165] [2024-06-20 16:34:39,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637442165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:39,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:39,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:34:39,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740631697] [2024-06-20 16:34:39,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:39,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:34:39,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:39,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:34:39,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:34:39,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:39,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 152 transitions, 1687 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:39,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:39,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:39,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:39,952 INFO L124 PetriNetUnfolderBase]: 446/825 cut-off events. [2024-06-20 16:34:39,953 INFO L125 PetriNetUnfolderBase]: For 42851/42855 co-relation queries the response was YES. [2024-06-20 16:34:39,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5168 conditions, 825 events. 446/825 cut-off events. For 42851/42855 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3918 event pairs, 80 based on Foata normal form. 5/829 useless extension candidates. Maximal degree in co-relation 5085. Up to 425 conditions per place. [2024-06-20 16:34:39,957 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 88 selfloop transitions, 82 changer transitions 0/172 dead transitions. [2024-06-20 16:34:39,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 172 transitions, 2415 flow [2024-06-20 16:34:39,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:34:39,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:34:39,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-20 16:34:39,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967741935483871 [2024-06-20 16:34:39,958 INFO L175 Difference]: Start difference. First operand has 178 places, 152 transitions, 1687 flow. Second operand 10 states and 123 transitions. [2024-06-20 16:34:39,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 172 transitions, 2415 flow [2024-06-20 16:34:40,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 172 transitions, 2253 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-20 16:34:40,035 INFO L231 Difference]: Finished difference. Result has 180 places, 153 transitions, 1713 flow [2024-06-20 16:34:40,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1529, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1713, PETRI_PLACES=180, PETRI_TRANSITIONS=153} [2024-06-20 16:34:40,036 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 150 predicate places. [2024-06-20 16:34:40,036 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 153 transitions, 1713 flow [2024-06-20 16:34:40,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:40,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:40,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:40,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 16:34:40,037 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:40,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:40,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1386392384, now seen corresponding path program 2 times [2024-06-20 16:34:40,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:40,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81202652] [2024-06-20 16:34:40,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:40,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:40,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:40,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:40,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:40,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81202652] [2024-06-20 16:34:40,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81202652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:40,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:40,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:34:40,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797929432] [2024-06-20 16:34:40,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:40,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:34:40,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:40,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:34:40,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:34:41,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:41,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 153 transitions, 1713 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:41,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:41,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:41,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:41,297 INFO L124 PetriNetUnfolderBase]: 442/818 cut-off events. [2024-06-20 16:34:41,297 INFO L125 PetriNetUnfolderBase]: For 38330/38334 co-relation queries the response was YES. [2024-06-20 16:34:41,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5155 conditions, 818 events. 442/818 cut-off events. For 38330/38334 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3884 event pairs, 103 based on Foata normal form. 5/822 useless extension candidates. Maximal degree in co-relation 5071. Up to 732 conditions per place. [2024-06-20 16:34:41,302 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 127 selfloop transitions, 36 changer transitions 0/165 dead transitions. [2024-06-20 16:34:41,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 165 transitions, 2081 flow [2024-06-20 16:34:41,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:34:41,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:34:41,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 112 transitions. [2024-06-20 16:34:41,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3284457478005865 [2024-06-20 16:34:41,303 INFO L175 Difference]: Start difference. First operand has 180 places, 153 transitions, 1713 flow. Second operand 11 states and 112 transitions. [2024-06-20 16:34:41,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 165 transitions, 2081 flow [2024-06-20 16:34:41,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 165 transitions, 1845 flow, removed 15 selfloop flow, removed 11 redundant places. [2024-06-20 16:34:41,392 INFO L231 Difference]: Finished difference. Result has 180 places, 154 transitions, 1571 flow [2024-06-20 16:34:41,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1480, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1571, PETRI_PLACES=180, PETRI_TRANSITIONS=154} [2024-06-20 16:34:41,392 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 150 predicate places. [2024-06-20 16:34:41,392 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 154 transitions, 1571 flow [2024-06-20 16:34:41,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:41,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:41,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:41,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 16:34:41,393 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:41,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:41,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1376861465, now seen corresponding path program 11 times [2024-06-20 16:34:41,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:41,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516201710] [2024-06-20 16:34:41,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:41,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:41,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:42,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:42,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:42,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516201710] [2024-06-20 16:34:42,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516201710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:42,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:42,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:34:42,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568485089] [2024-06-20 16:34:42,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:42,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:34:42,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:42,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:34:42,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:34:42,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:42,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 154 transitions, 1571 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:42,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:42,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:42,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:42,440 INFO L124 PetriNetUnfolderBase]: 438/812 cut-off events. [2024-06-20 16:34:42,440 INFO L125 PetriNetUnfolderBase]: For 37699/37703 co-relation queries the response was YES. [2024-06-20 16:34:42,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4825 conditions, 812 events. 438/812 cut-off events. For 37699/37703 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3839 event pairs, 72 based on Foata normal form. 3/814 useless extension candidates. Maximal degree in co-relation 4742. Up to 420 conditions per place. [2024-06-20 16:34:42,445 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 87 selfloop transitions, 83 changer transitions 0/172 dead transitions. [2024-06-20 16:34:42,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 172 transitions, 2185 flow [2024-06-20 16:34:42,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:34:42,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:34:42,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-20 16:34:42,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967741935483871 [2024-06-20 16:34:42,446 INFO L175 Difference]: Start difference. First operand has 180 places, 154 transitions, 1571 flow. Second operand 10 states and 123 transitions. [2024-06-20 16:34:42,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 172 transitions, 2185 flow [2024-06-20 16:34:42,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 172 transitions, 2099 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-20 16:34:42,524 INFO L231 Difference]: Finished difference. Result has 181 places, 154 transitions, 1656 flow [2024-06-20 16:34:42,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1485, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1656, PETRI_PLACES=181, PETRI_TRANSITIONS=154} [2024-06-20 16:34:42,525 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 151 predicate places. [2024-06-20 16:34:42,525 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 154 transitions, 1656 flow [2024-06-20 16:34:42,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:42,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:42,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:42,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 16:34:42,525 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:42,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:42,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1376869184, now seen corresponding path program 3 times [2024-06-20 16:34:42,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:42,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617352627] [2024-06-20 16:34:42,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:42,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:43,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:43,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:43,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617352627] [2024-06-20 16:34:43,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617352627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:43,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:43,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:34:43,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673448314] [2024-06-20 16:34:43,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:43,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:34:43,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:43,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:34:43,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:34:43,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:43,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 154 transitions, 1656 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:43,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:43,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:43,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:43,726 INFO L124 PetriNetUnfolderBase]: 430/799 cut-off events. [2024-06-20 16:34:43,727 INFO L125 PetriNetUnfolderBase]: For 36150/36154 co-relation queries the response was YES. [2024-06-20 16:34:43,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4746 conditions, 799 events. 430/799 cut-off events. For 36150/36154 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3790 event pairs, 70 based on Foata normal form. 4/802 useless extension candidates. Maximal degree in co-relation 4662. Up to 482 conditions per place. [2024-06-20 16:34:43,734 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 98 selfloop transitions, 71 changer transitions 0/171 dead transitions. [2024-06-20 16:34:43,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 171 transitions, 2158 flow [2024-06-20 16:34:43,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:34:43,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:34:43,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-20 16:34:43,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38387096774193546 [2024-06-20 16:34:43,735 INFO L175 Difference]: Start difference. First operand has 181 places, 154 transitions, 1656 flow. Second operand 10 states and 119 transitions. [2024-06-20 16:34:43,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 171 transitions, 2158 flow [2024-06-20 16:34:43,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 171 transitions, 1933 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-20 16:34:43,813 INFO L231 Difference]: Finished difference. Result has 182 places, 154 transitions, 1581 flow [2024-06-20 16:34:43,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1431, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1581, PETRI_PLACES=182, PETRI_TRANSITIONS=154} [2024-06-20 16:34:43,814 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 152 predicate places. [2024-06-20 16:34:43,814 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 154 transitions, 1581 flow [2024-06-20 16:34:43,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:43,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:43,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:43,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 16:34:43,815 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:43,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:43,815 INFO L85 PathProgramCache]: Analyzing trace with hash -256679860, now seen corresponding path program 1 times [2024-06-20 16:34:43,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:43,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488313333] [2024-06-20 16:34:43,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:43,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:43,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:44,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:44,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:44,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488313333] [2024-06-20 16:34:44,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488313333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:44,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:44,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:34:44,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274440454] [2024-06-20 16:34:44,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:44,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:34:44,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:44,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:34:44,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:34:44,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:44,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 154 transitions, 1581 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:44,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:44,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:44,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:44,835 INFO L124 PetriNetUnfolderBase]: 434/807 cut-off events. [2024-06-20 16:34:44,835 INFO L125 PetriNetUnfolderBase]: For 35540/35544 co-relation queries the response was YES. [2024-06-20 16:34:44,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4704 conditions, 807 events. 434/807 cut-off events. For 35540/35544 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3851 event pairs, 67 based on Foata normal form. 6/812 useless extension candidates. Maximal degree in co-relation 4619. Up to 684 conditions per place. [2024-06-20 16:34:44,840 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 148 selfloop transitions, 20 changer transitions 0/170 dead transitions. [2024-06-20 16:34:44,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 170 transitions, 1963 flow [2024-06-20 16:34:44,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:44,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:44,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 91 transitions. [2024-06-20 16:34:44,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32616487455197135 [2024-06-20 16:34:44,841 INFO L175 Difference]: Start difference. First operand has 182 places, 154 transitions, 1581 flow. Second operand 9 states and 91 transitions. [2024-06-20 16:34:44,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 170 transitions, 1963 flow [2024-06-20 16:34:44,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 170 transitions, 1796 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-20 16:34:44,917 INFO L231 Difference]: Finished difference. Result has 182 places, 155 transitions, 1469 flow [2024-06-20 16:34:44,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1414, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1469, PETRI_PLACES=182, PETRI_TRANSITIONS=155} [2024-06-20 16:34:44,917 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 152 predicate places. [2024-06-20 16:34:44,917 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 155 transitions, 1469 flow [2024-06-20 16:34:44,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:44,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:44,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:44,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 16:34:44,918 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:44,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:44,918 INFO L85 PathProgramCache]: Analyzing trace with hash 26372012, now seen corresponding path program 2 times [2024-06-20 16:34:44,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:44,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868763758] [2024-06-20 16:34:44,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:44,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:44,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:45,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:45,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:45,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868763758] [2024-06-20 16:34:45,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868763758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:45,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:45,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:34:45,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657398411] [2024-06-20 16:34:45,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:45,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:34:45,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:45,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:34:45,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:34:45,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:45,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 155 transitions, 1469 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:45,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:45,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:45,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:46,034 INFO L124 PetriNetUnfolderBase]: 445/828 cut-off events. [2024-06-20 16:34:46,034 INFO L125 PetriNetUnfolderBase]: For 39776/39780 co-relation queries the response was YES. [2024-06-20 16:34:46,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4790 conditions, 828 events. 445/828 cut-off events. For 39776/39780 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4000 event pairs, 91 based on Foata normal form. 6/833 useless extension candidates. Maximal degree in co-relation 4704. Up to 695 conditions per place. [2024-06-20 16:34:46,039 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 146 selfloop transitions, 25 changer transitions 0/173 dead transitions. [2024-06-20 16:34:46,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 173 transitions, 1989 flow [2024-06-20 16:34:46,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:46,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:46,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 98 transitions. [2024-06-20 16:34:46,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35125448028673834 [2024-06-20 16:34:46,040 INFO L175 Difference]: Start difference. First operand has 182 places, 155 transitions, 1469 flow. Second operand 9 states and 98 transitions. [2024-06-20 16:34:46,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 173 transitions, 1989 flow [2024-06-20 16:34:46,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 173 transitions, 1946 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 16:34:46,124 INFO L231 Difference]: Finished difference. Result has 184 places, 157 transitions, 1502 flow [2024-06-20 16:34:46,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1426, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1502, PETRI_PLACES=184, PETRI_TRANSITIONS=157} [2024-06-20 16:34:46,125 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 154 predicate places. [2024-06-20 16:34:46,125 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 157 transitions, 1502 flow [2024-06-20 16:34:46,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:46,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:46,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:46,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 16:34:46,126 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:46,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:46,126 INFO L85 PathProgramCache]: Analyzing trace with hash 26487332, now seen corresponding path program 3 times [2024-06-20 16:34:46,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:46,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188800637] [2024-06-20 16:34:46,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:46,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:46,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:46,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:46,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:46,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188800637] [2024-06-20 16:34:46,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188800637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:46,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:46,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:34:46,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370133763] [2024-06-20 16:34:46,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:46,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:34:46,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:46,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:34:46,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:34:46,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:46,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 157 transitions, 1502 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:46,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:46,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:46,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:47,230 INFO L124 PetriNetUnfolderBase]: 449/836 cut-off events. [2024-06-20 16:34:47,230 INFO L125 PetriNetUnfolderBase]: For 41292/41296 co-relation queries the response was YES. [2024-06-20 16:34:47,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4862 conditions, 836 events. 449/836 cut-off events. For 41292/41296 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4046 event pairs, 89 based on Foata normal form. 6/841 useless extension candidates. Maximal degree in co-relation 4775. Up to 723 conditions per place. [2024-06-20 16:34:47,237 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 146 selfloop transitions, 26 changer transitions 0/174 dead transitions. [2024-06-20 16:34:47,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 174 transitions, 2020 flow [2024-06-20 16:34:47,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:47,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:47,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2024-06-20 16:34:47,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34767025089605735 [2024-06-20 16:34:47,238 INFO L175 Difference]: Start difference. First operand has 184 places, 157 transitions, 1502 flow. Second operand 9 states and 97 transitions. [2024-06-20 16:34:47,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 174 transitions, 2020 flow [2024-06-20 16:34:47,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 174 transitions, 1974 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 16:34:47,339 INFO L231 Difference]: Finished difference. Result has 188 places, 158 transitions, 1524 flow [2024-06-20 16:34:47,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1460, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1524, PETRI_PLACES=188, PETRI_TRANSITIONS=158} [2024-06-20 16:34:47,340 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 158 predicate places. [2024-06-20 16:34:47,340 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 158 transitions, 1524 flow [2024-06-20 16:34:47,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:47,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:47,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:47,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 16:34:47,341 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:47,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:47,341 INFO L85 PathProgramCache]: Analyzing trace with hash 26491982, now seen corresponding path program 4 times [2024-06-20 16:34:47,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:47,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851512930] [2024-06-20 16:34:47,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:47,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:47,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:48,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:48,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:48,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851512930] [2024-06-20 16:34:48,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851512930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:48,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:48,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:34:48,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404016332] [2024-06-20 16:34:48,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:48,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:34:48,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:48,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:34:48,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:34:48,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:48,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 158 transitions, 1524 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:48,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:48,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:48,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:48,441 INFO L124 PetriNetUnfolderBase]: 446/831 cut-off events. [2024-06-20 16:34:48,441 INFO L125 PetriNetUnfolderBase]: For 39041/39045 co-relation queries the response was YES. [2024-06-20 16:34:48,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4763 conditions, 831 events. 446/831 cut-off events. For 39041/39045 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4016 event pairs, 90 based on Foata normal form. 6/836 useless extension candidates. Maximal degree in co-relation 4674. Up to 737 conditions per place. [2024-06-20 16:34:48,447 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 145 selfloop transitions, 26 changer transitions 0/173 dead transitions. [2024-06-20 16:34:48,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 173 transitions, 1910 flow [2024-06-20 16:34:48,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:48,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:48,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 95 transitions. [2024-06-20 16:34:48,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34050179211469533 [2024-06-20 16:34:48,448 INFO L175 Difference]: Start difference. First operand has 188 places, 158 transitions, 1524 flow. Second operand 9 states and 95 transitions. [2024-06-20 16:34:48,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 173 transitions, 1910 flow [2024-06-20 16:34:48,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 173 transitions, 1849 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 16:34:48,554 INFO L231 Difference]: Finished difference. Result has 190 places, 158 transitions, 1520 flow [2024-06-20 16:34:48,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1463, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1520, PETRI_PLACES=190, PETRI_TRANSITIONS=158} [2024-06-20 16:34:48,554 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 160 predicate places. [2024-06-20 16:34:48,555 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 158 transitions, 1520 flow [2024-06-20 16:34:48,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:48,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:48,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:48,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 16:34:48,555 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:48,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:48,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1600642740, now seen corresponding path program 1 times [2024-06-20 16:34:48,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:48,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150115852] [2024-06-20 16:34:48,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:48,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:48,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:49,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:49,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:49,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150115852] [2024-06-20 16:34:49,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150115852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:49,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:49,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:34:49,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265545437] [2024-06-20 16:34:49,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:49,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:34:49,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:49,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:34:49,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:34:49,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:49,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 158 transitions, 1520 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:49,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:49,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:49,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:49,838 INFO L124 PetriNetUnfolderBase]: 441/816 cut-off events. [2024-06-20 16:34:49,838 INFO L125 PetriNetUnfolderBase]: For 36544/36548 co-relation queries the response was YES. [2024-06-20 16:34:49,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4647 conditions, 816 events. 441/816 cut-off events. For 36544/36548 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 3916 event pairs, 88 based on Foata normal form. 5/820 useless extension candidates. Maximal degree in co-relation 4557. Up to 719 conditions per place. [2024-06-20 16:34:49,844 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 140 selfloop transitions, 27 changer transitions 4/173 dead transitions. [2024-06-20 16:34:49,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 173 transitions, 1908 flow [2024-06-20 16:34:49,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:49,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:49,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-06-20 16:34:49,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34408602150537637 [2024-06-20 16:34:49,845 INFO L175 Difference]: Start difference. First operand has 190 places, 158 transitions, 1520 flow. Second operand 9 states and 96 transitions. [2024-06-20 16:34:49,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 173 transitions, 1908 flow [2024-06-20 16:34:49,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 173 transitions, 1847 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 16:34:49,935 INFO L231 Difference]: Finished difference. Result has 191 places, 154 transitions, 1472 flow [2024-06-20 16:34:49,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1459, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1472, PETRI_PLACES=191, PETRI_TRANSITIONS=154} [2024-06-20 16:34:49,936 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 161 predicate places. [2024-06-20 16:34:49,936 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 154 transitions, 1472 flow [2024-06-20 16:34:49,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:49,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:49,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:49,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 16:34:49,937 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:49,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:49,937 INFO L85 PathProgramCache]: Analyzing trace with hash 475617560, now seen corresponding path program 5 times [2024-06-20 16:34:49,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:49,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529111515] [2024-06-20 16:34:49,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:49,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:49,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:50,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:50,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:50,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529111515] [2024-06-20 16:34:50,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529111515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:50,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:50,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:34:50,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588271513] [2024-06-20 16:34:50,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:50,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:34:50,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:50,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:34:50,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:34:50,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:50,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 154 transitions, 1472 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:50,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:50,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:50,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:51,203 INFO L124 PetriNetUnfolderBase]: 428/789 cut-off events. [2024-06-20 16:34:51,204 INFO L125 PetriNetUnfolderBase]: For 39625/39629 co-relation queries the response was YES. [2024-06-20 16:34:51,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4578 conditions, 789 events. 428/789 cut-off events. For 39625/39629 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3779 event pairs, 63 based on Foata normal form. 3/791 useless extension candidates. Maximal degree in co-relation 4487. Up to 580 conditions per place. [2024-06-20 16:34:51,208 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 112 selfloop transitions, 55 changer transitions 0/169 dead transitions. [2024-06-20 16:34:51,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 169 transitions, 1860 flow [2024-06-20 16:34:51,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:51,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:51,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-06-20 16:34:51,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2024-06-20 16:34:51,210 INFO L175 Difference]: Start difference. First operand has 191 places, 154 transitions, 1472 flow. Second operand 9 states and 102 transitions. [2024-06-20 16:34:51,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 169 transitions, 1860 flow [2024-06-20 16:34:51,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 169 transitions, 1684 flow, removed 6 selfloop flow, removed 13 redundant places. [2024-06-20 16:34:51,302 INFO L231 Difference]: Finished difference. Result has 187 places, 155 transitions, 1424 flow [2024-06-20 16:34:51,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1296, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1424, PETRI_PLACES=187, PETRI_TRANSITIONS=155} [2024-06-20 16:34:51,303 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 157 predicate places. [2024-06-20 16:34:51,303 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 155 transitions, 1424 flow [2024-06-20 16:34:51,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:51,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:51,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:51,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 16:34:51,303 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:51,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:51,304 INFO L85 PathProgramCache]: Analyzing trace with hash 469188470, now seen corresponding path program 6 times [2024-06-20 16:34:51,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:51,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862937639] [2024-06-20 16:34:51,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:51,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:51,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:52,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:52,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:52,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862937639] [2024-06-20 16:34:52,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862937639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:52,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:52,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:52,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537192097] [2024-06-20 16:34:52,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:52,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:52,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:52,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:52,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:52,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:52,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 155 transitions, 1424 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) [2024-06-20 16:34:52,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:52,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:52,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:52,313 INFO L124 PetriNetUnfolderBase]: 432/797 cut-off events. [2024-06-20 16:34:52,314 INFO L125 PetriNetUnfolderBase]: For 38465/38469 co-relation queries the response was YES. [2024-06-20 16:34:52,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4564 conditions, 797 events. 432/797 cut-off events. For 38465/38469 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3829 event pairs, 65 based on Foata normal form. 3/799 useless extension candidates. Maximal degree in co-relation 4473. Up to 588 conditions per place. [2024-06-20 16:34:52,319 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 116 selfloop transitions, 52 changer transitions 0/170 dead transitions. [2024-06-20 16:34:52,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 170 transitions, 1816 flow [2024-06-20 16:34:52,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:52,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:52,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-06-20 16:34:52,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2024-06-20 16:34:52,320 INFO L175 Difference]: Start difference. First operand has 187 places, 155 transitions, 1424 flow. Second operand 9 states and 102 transitions. [2024-06-20 16:34:52,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 170 transitions, 1816 flow [2024-06-20 16:34:52,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 170 transitions, 1698 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 16:34:52,425 INFO L231 Difference]: Finished difference. Result has 189 places, 156 transitions, 1430 flow [2024-06-20 16:34:52,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1306, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1430, PETRI_PLACES=189, PETRI_TRANSITIONS=156} [2024-06-20 16:34:52,425 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 159 predicate places. [2024-06-20 16:34:52,425 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 156 transitions, 1430 flow [2024-06-20 16:34:52,425 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) [2024-06-20 16:34:52,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:52,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:52,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 16:34:52,426 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:52,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:52,426 INFO L85 PathProgramCache]: Analyzing trace with hash 469183820, now seen corresponding path program 7 times [2024-06-20 16:34:52,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:52,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994251468] [2024-06-20 16:34:52,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:52,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:52,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:53,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:53,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:53,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994251468] [2024-06-20 16:34:53,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994251468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:53,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:53,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:53,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427715802] [2024-06-20 16:34:53,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:53,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:53,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:53,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:53,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:53,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:53,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 156 transitions, 1430 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) [2024-06-20 16:34:53,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:53,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:53,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:53,452 INFO L124 PetriNetUnfolderBase]: 436/805 cut-off events. [2024-06-20 16:34:53,452 INFO L125 PetriNetUnfolderBase]: For 39823/39827 co-relation queries the response was YES. [2024-06-20 16:34:53,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4607 conditions, 805 events. 436/805 cut-off events. For 39823/39827 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 3881 event pairs, 65 based on Foata normal form. 3/807 useless extension candidates. Maximal degree in co-relation 4515. Up to 576 conditions per place. [2024-06-20 16:34:53,457 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 115 selfloop transitions, 54 changer transitions 0/171 dead transitions. [2024-06-20 16:34:53,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 171 transitions, 1824 flow [2024-06-20 16:34:53,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:53,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:53,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-06-20 16:34:53,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2024-06-20 16:34:53,459 INFO L175 Difference]: Start difference. First operand has 189 places, 156 transitions, 1430 flow. Second operand 9 states and 102 transitions. [2024-06-20 16:34:53,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 171 transitions, 1824 flow [2024-06-20 16:34:53,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 171 transitions, 1710 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-20 16:34:53,550 INFO L231 Difference]: Finished difference. Result has 191 places, 157 transitions, 1446 flow [2024-06-20 16:34:53,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1316, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1446, PETRI_PLACES=191, PETRI_TRANSITIONS=157} [2024-06-20 16:34:53,551 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 161 predicate places. [2024-06-20 16:34:53,551 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 157 transitions, 1446 flow [2024-06-20 16:34:53,551 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) [2024-06-20 16:34:53,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:53,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:53,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 16:34:53,551 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:53,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:53,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1839602766, now seen corresponding path program 8 times [2024-06-20 16:34:53,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:53,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558602034] [2024-06-20 16:34:53,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:53,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:53,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:54,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:54,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:54,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558602034] [2024-06-20 16:34:54,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558602034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:54,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:54,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:34:54,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209087280] [2024-06-20 16:34:54,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:54,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:34:54,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:54,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:34:54,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:34:54,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:54,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 157 transitions, 1446 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:54,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:54,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:54,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:54,790 INFO L124 PetriNetUnfolderBase]: 440/813 cut-off events. [2024-06-20 16:34:54,791 INFO L125 PetriNetUnfolderBase]: For 41161/41165 co-relation queries the response was YES. [2024-06-20 16:34:54,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4670 conditions, 813 events. 440/813 cut-off events. For 41161/41165 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3930 event pairs, 73 based on Foata normal form. 3/815 useless extension candidates. Maximal degree in co-relation 4577. Up to 604 conditions per place. [2024-06-20 16:34:54,795 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 121 selfloop transitions, 49 changer transitions 0/172 dead transitions. [2024-06-20 16:34:54,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 172 transitions, 1846 flow [2024-06-20 16:34:54,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:54,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:54,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 100 transitions. [2024-06-20 16:34:54,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35842293906810035 [2024-06-20 16:34:54,796 INFO L175 Difference]: Start difference. First operand has 191 places, 157 transitions, 1446 flow. Second operand 9 states and 100 transitions. [2024-06-20 16:34:54,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 172 transitions, 1846 flow [2024-06-20 16:34:54,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 172 transitions, 1726 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-20 16:34:54,892 INFO L231 Difference]: Finished difference. Result has 193 places, 158 transitions, 1448 flow [2024-06-20 16:34:54,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1326, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1448, PETRI_PLACES=193, PETRI_TRANSITIONS=158} [2024-06-20 16:34:54,893 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 163 predicate places. [2024-06-20 16:34:54,893 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 158 transitions, 1448 flow [2024-06-20 16:34:54,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:54,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:54,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:54,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 16:34:54,894 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:54,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:54,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1839598116, now seen corresponding path program 9 times [2024-06-20 16:34:54,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:54,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221621055] [2024-06-20 16:34:54,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:54,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:54,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:55,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:55,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:55,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221621055] [2024-06-20 16:34:55,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221621055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:55,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:55,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:55,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344834235] [2024-06-20 16:34:55,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:55,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:55,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:55,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:55,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:55,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:55,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 158 transitions, 1448 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) [2024-06-20 16:34:55,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:55,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:55,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:56,052 INFO L124 PetriNetUnfolderBase]: 444/821 cut-off events. [2024-06-20 16:34:56,052 INFO L125 PetriNetUnfolderBase]: For 42449/42453 co-relation queries the response was YES. [2024-06-20 16:34:56,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4713 conditions, 821 events. 444/821 cut-off events. For 42449/42453 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 3983 event pairs, 73 based on Foata normal form. 3/823 useless extension candidates. Maximal degree in co-relation 4619. Up to 598 conditions per place. [2024-06-20 16:34:56,057 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 121 selfloop transitions, 50 changer transitions 0/173 dead transitions. [2024-06-20 16:34:56,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 173 transitions, 1850 flow [2024-06-20 16:34:56,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:56,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:56,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2024-06-20 16:34:56,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36200716845878134 [2024-06-20 16:34:56,058 INFO L175 Difference]: Start difference. First operand has 193 places, 158 transitions, 1448 flow. Second operand 9 states and 101 transitions. [2024-06-20 16:34:56,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 173 transitions, 1850 flow [2024-06-20 16:34:56,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 173 transitions, 1738 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-20 16:34:56,151 INFO L231 Difference]: Finished difference. Result has 195 places, 159 transitions, 1462 flow [2024-06-20 16:34:56,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1336, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1462, PETRI_PLACES=195, PETRI_TRANSITIONS=159} [2024-06-20 16:34:56,151 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 165 predicate places. [2024-06-20 16:34:56,151 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 159 transitions, 1462 flow [2024-06-20 16:34:56,151 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) [2024-06-20 16:34:56,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:56,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:56,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 16:34:56,152 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:56,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:56,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1839482796, now seen corresponding path program 10 times [2024-06-20 16:34:56,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:56,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552703366] [2024-06-20 16:34:56,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:56,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:56,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:57,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:57,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:57,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552703366] [2024-06-20 16:34:57,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552703366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:57,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:57,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:57,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081894959] [2024-06-20 16:34:57,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:57,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:57,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:57,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:57,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:57,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:57,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 159 transitions, 1462 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) [2024-06-20 16:34:57,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:57,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:57,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:57,310 INFO L124 PetriNetUnfolderBase]: 448/829 cut-off events. [2024-06-20 16:34:57,310 INFO L125 PetriNetUnfolderBase]: For 43840/43844 co-relation queries the response was YES. [2024-06-20 16:34:57,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4772 conditions, 829 events. 448/829 cut-off events. For 43840/43844 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 4050 event pairs, 77 based on Foata normal form. 3/831 useless extension candidates. Maximal degree in co-relation 4677. Up to 525 conditions per place. [2024-06-20 16:34:57,316 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 118 selfloop transitions, 55 changer transitions 0/175 dead transitions. [2024-06-20 16:34:57,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 175 transitions, 2000 flow [2024-06-20 16:34:57,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:57,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:57,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2024-06-20 16:34:57,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36200716845878134 [2024-06-20 16:34:57,317 INFO L175 Difference]: Start difference. First operand has 195 places, 159 transitions, 1462 flow. Second operand 9 states and 101 transitions. [2024-06-20 16:34:57,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 175 transitions, 2000 flow [2024-06-20 16:34:57,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 175 transitions, 1884 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 16:34:57,422 INFO L231 Difference]: Finished difference. Result has 197 places, 160 transitions, 1482 flow [2024-06-20 16:34:57,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1346, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1482, PETRI_PLACES=197, PETRI_TRANSITIONS=160} [2024-06-20 16:34:57,422 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 167 predicate places. [2024-06-20 16:34:57,422 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 160 transitions, 1482 flow [2024-06-20 16:34:57,423 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) [2024-06-20 16:34:57,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:57,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:57,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 16:34:57,423 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:57,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:57,423 INFO L85 PathProgramCache]: Analyzing trace with hash 365011872, now seen corresponding path program 11 times [2024-06-20 16:34:57,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:57,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954002834] [2024-06-20 16:34:57,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:57,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:57,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:58,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:58,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:58,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954002834] [2024-06-20 16:34:58,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954002834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:58,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:58,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:34:58,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020669805] [2024-06-20 16:34:58,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:58,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:34:58,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:58,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:34:58,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:34:58,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:58,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 160 transitions, 1482 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:58,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:58,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:58,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:58,668 INFO L124 PetriNetUnfolderBase]: 452/837 cut-off events. [2024-06-20 16:34:58,668 INFO L125 PetriNetUnfolderBase]: For 45337/45341 co-relation queries the response was YES. [2024-06-20 16:34:58,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4845 conditions, 837 events. 452/837 cut-off events. For 45337/45341 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4091 event pairs, 79 based on Foata normal form. 3/839 useless extension candidates. Maximal degree in co-relation 4749. Up to 601 conditions per place. [2024-06-20 16:34:58,678 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 123 selfloop transitions, 50 changer transitions 0/175 dead transitions. [2024-06-20 16:34:58,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 175 transitions, 2022 flow [2024-06-20 16:34:58,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:58,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:58,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 103 transitions. [2024-06-20 16:34:58,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36917562724014336 [2024-06-20 16:34:58,679 INFO L175 Difference]: Start difference. First operand has 197 places, 160 transitions, 1482 flow. Second operand 9 states and 103 transitions. [2024-06-20 16:34:58,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 175 transitions, 2022 flow [2024-06-20 16:34:58,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 175 transitions, 1888 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-20 16:34:58,784 INFO L231 Difference]: Finished difference. Result has 199 places, 161 transitions, 1476 flow [2024-06-20 16:34:58,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1355, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1476, PETRI_PLACES=199, PETRI_TRANSITIONS=161} [2024-06-20 16:34:58,784 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 169 predicate places. [2024-06-20 16:34:58,784 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 161 transitions, 1476 flow [2024-06-20 16:34:58,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:58,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:58,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:58,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 16:34:58,785 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:34:58,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:58,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1115559956, now seen corresponding path program 12 times [2024-06-20 16:34:58,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:58,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624088061] [2024-06-20 16:34:58,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:58,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:58,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:59,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:59,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:59,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624088061] [2024-06-20 16:34:59,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624088061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:59,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:59,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:34:59,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790623755] [2024-06-20 16:34:59,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:59,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:34:59,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:59,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:34:59,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:34:59,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:34:59,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 161 transitions, 1476 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:59,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:59,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:34:59,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:59,994 INFO L124 PetriNetUnfolderBase]: 456/845 cut-off events. [2024-06-20 16:34:59,994 INFO L125 PetriNetUnfolderBase]: For 46520/46524 co-relation queries the response was YES. [2024-06-20 16:34:59,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4815 conditions, 845 events. 456/845 cut-off events. For 46520/46524 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4155 event pairs, 79 based on Foata normal form. 3/847 useless extension candidates. Maximal degree in co-relation 4719. Up to 636 conditions per place. [2024-06-20 16:35:00,000 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 125 selfloop transitions, 48 changer transitions 0/175 dead transitions. [2024-06-20 16:35:00,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 175 transitions, 1879 flow [2024-06-20 16:35:00,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:35:00,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:35:00,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2024-06-20 16:35:00,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36200716845878134 [2024-06-20 16:35:00,001 INFO L175 Difference]: Start difference. First operand has 199 places, 161 transitions, 1476 flow. Second operand 9 states and 101 transitions. [2024-06-20 16:35:00,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 175 transitions, 1879 flow [2024-06-20 16:35:00,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 175 transitions, 1706 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-20 16:35:00,107 INFO L231 Difference]: Finished difference. Result has 199 places, 162 transitions, 1424 flow [2024-06-20 16:35:00,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1305, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1424, PETRI_PLACES=199, PETRI_TRANSITIONS=162} [2024-06-20 16:35:00,108 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 169 predicate places. [2024-06-20 16:35:00,108 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 162 transitions, 1424 flow [2024-06-20 16:35:00,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:00,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:00,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:00,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 16:35:00,108 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:00,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:00,109 INFO L85 PathProgramCache]: Analyzing trace with hash 905648336, now seen corresponding path program 13 times [2024-06-20 16:35:00,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:00,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519999229] [2024-06-20 16:35:00,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:00,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:00,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:01,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:01,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:01,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519999229] [2024-06-20 16:35:01,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519999229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:01,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:01,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:35:01,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097831388] [2024-06-20 16:35:01,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:01,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:35:01,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:01,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:35:01,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:35:01,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:01,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 162 transitions, 1424 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:01,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:01,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:01,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:01,407 INFO L124 PetriNetUnfolderBase]: 460/853 cut-off events. [2024-06-20 16:35:01,408 INFO L125 PetriNetUnfolderBase]: For 47851/47855 co-relation queries the response was YES. [2024-06-20 16:35:01,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4716 conditions, 853 events. 460/853 cut-off events. For 47851/47855 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 4224 event pairs, 79 based on Foata normal form. 3/855 useless extension candidates. Maximal degree in co-relation 4621. Up to 644 conditions per place. [2024-06-20 16:35:01,415 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 128 selfloop transitions, 47 changer transitions 0/177 dead transitions. [2024-06-20 16:35:01,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 177 transitions, 1835 flow [2024-06-20 16:35:01,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:35:01,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:35:01,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-06-20 16:35:01,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2024-06-20 16:35:01,417 INFO L175 Difference]: Start difference. First operand has 199 places, 162 transitions, 1424 flow. Second operand 9 states and 102 transitions. [2024-06-20 16:35:01,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 177 transitions, 1835 flow [2024-06-20 16:35:01,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 177 transitions, 1727 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-20 16:35:01,531 INFO L231 Difference]: Finished difference. Result has 201 places, 163 transitions, 1435 flow [2024-06-20 16:35:01,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1316, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1435, PETRI_PLACES=201, PETRI_TRANSITIONS=163} [2024-06-20 16:35:01,532 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 171 predicate places. [2024-06-20 16:35:01,532 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 163 transitions, 1435 flow [2024-06-20 16:35:01,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:01,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:01,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:01,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 16:35:01,532 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:01,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:01,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1435872850, now seen corresponding path program 1 times [2024-06-20 16:35:01,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:01,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967002924] [2024-06-20 16:35:01,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:01,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:01,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:02,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:02,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:02,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967002924] [2024-06-20 16:35:02,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967002924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:02,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:02,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:35:02,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063168066] [2024-06-20 16:35:02,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:02,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:35:02,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:02,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:35:02,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:35:02,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:02,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 163 transitions, 1435 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:02,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:02,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:02,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:02,687 INFO L124 PetriNetUnfolderBase]: 464/861 cut-off events. [2024-06-20 16:35:02,687 INFO L125 PetriNetUnfolderBase]: For 49190/49194 co-relation queries the response was YES. [2024-06-20 16:35:02,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4751 conditions, 861 events. 464/861 cut-off events. For 49190/49194 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 4272 event pairs, 101 based on Foata normal form. 6/866 useless extension candidates. Maximal degree in co-relation 4655. Up to 777 conditions per place. [2024-06-20 16:35:02,692 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 142 selfloop transitions, 32 changer transitions 0/176 dead transitions. [2024-06-20 16:35:02,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 176 transitions, 1829 flow [2024-06-20 16:35:02,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:02,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:02,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 103 transitions. [2024-06-20 16:35:02,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33225806451612905 [2024-06-20 16:35:02,693 INFO L175 Difference]: Start difference. First operand has 201 places, 163 transitions, 1435 flow. Second operand 10 states and 103 transitions. [2024-06-20 16:35:02,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 176 transitions, 1829 flow [2024-06-20 16:35:02,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 176 transitions, 1721 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-20 16:35:02,797 INFO L231 Difference]: Finished difference. Result has 205 places, 165 transitions, 1420 flow [2024-06-20 16:35:02,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1420, PETRI_PLACES=205, PETRI_TRANSITIONS=165} [2024-06-20 16:35:02,797 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 175 predicate places. [2024-06-20 16:35:02,797 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 165 transitions, 1420 flow [2024-06-20 16:35:02,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:02,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:02,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:02,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 16:35:02,798 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:02,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:02,798 INFO L85 PathProgramCache]: Analyzing trace with hash 18364284, now seen corresponding path program 1 times [2024-06-20 16:35:02,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:02,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286426603] [2024-06-20 16:35:02,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:02,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:02,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:03,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:03,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:03,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286426603] [2024-06-20 16:35:03,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286426603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:03,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:03,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:35:03,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234447383] [2024-06-20 16:35:03,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:03,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:35:03,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:03,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:35:03,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:35:03,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:03,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 165 transitions, 1420 flow. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:03,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:03,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:03,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:04,103 INFO L124 PetriNetUnfolderBase]: 460/855 cut-off events. [2024-06-20 16:35:04,103 INFO L125 PetriNetUnfolderBase]: For 45365/45369 co-relation queries the response was YES. [2024-06-20 16:35:04,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4544 conditions, 855 events. 460/855 cut-off events. For 45365/45369 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 4238 event pairs, 78 based on Foata normal form. 3/857 useless extension candidates. Maximal degree in co-relation 4446. Up to 477 conditions per place. [2024-06-20 16:35:04,112 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 98 selfloop transitions, 82 changer transitions 0/182 dead transitions. [2024-06-20 16:35:04,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 182 transitions, 1832 flow [2024-06-20 16:35:04,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:35:04,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:35:04,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-20 16:35:04,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724340175953079 [2024-06-20 16:35:04,114 INFO L175 Difference]: Start difference. First operand has 205 places, 165 transitions, 1420 flow. Second operand 11 states and 127 transitions. [2024-06-20 16:35:04,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 182 transitions, 1832 flow [2024-06-20 16:35:04,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 182 transitions, 1755 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 16:35:04,242 INFO L231 Difference]: Finished difference. Result has 209 places, 165 transitions, 1512 flow [2024-06-20 16:35:04,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1343, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1512, PETRI_PLACES=209, PETRI_TRANSITIONS=165} [2024-06-20 16:35:04,242 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 179 predicate places. [2024-06-20 16:35:04,242 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 165 transitions, 1512 flow [2024-06-20 16:35:04,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:04,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:04,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:04,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 16:35:04,243 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:04,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:04,243 INFO L85 PathProgramCache]: Analyzing trace with hash 779035728, now seen corresponding path program 2 times [2024-06-20 16:35:04,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:04,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723838349] [2024-06-20 16:35:04,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:04,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:04,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:05,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:05,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:05,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723838349] [2024-06-20 16:35:05,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723838349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:05,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:05,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:35:05,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619091394] [2024-06-20 16:35:05,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:05,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:35:05,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:05,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:35:05,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:35:05,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:05,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 165 transitions, 1512 flow. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:05,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:05,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:05,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:05,577 INFO L124 PetriNetUnfolderBase]: 464/863 cut-off events. [2024-06-20 16:35:05,577 INFO L125 PetriNetUnfolderBase]: For 46827/46831 co-relation queries the response was YES. [2024-06-20 16:35:05,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4721 conditions, 863 events. 464/863 cut-off events. For 46827/46831 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 4296 event pairs, 102 based on Foata normal form. 6/868 useless extension candidates. Maximal degree in co-relation 4622. Up to 771 conditions per place. [2024-06-20 16:35:05,583 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 140 selfloop transitions, 37 changer transitions 0/179 dead transitions. [2024-06-20 16:35:05,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 179 transitions, 1912 flow [2024-06-20 16:35:05,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:35:05,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:35:05,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 120 transitions. [2024-06-20 16:35:05,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3225806451612903 [2024-06-20 16:35:05,584 INFO L175 Difference]: Start difference. First operand has 209 places, 165 transitions, 1512 flow. Second operand 12 states and 120 transitions. [2024-06-20 16:35:05,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 179 transitions, 1912 flow [2024-06-20 16:35:05,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 179 transitions, 1739 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 16:35:05,689 INFO L231 Difference]: Finished difference. Result has 211 places, 166 transitions, 1433 flow [2024-06-20 16:35:05,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1339, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1433, PETRI_PLACES=211, PETRI_TRANSITIONS=166} [2024-06-20 16:35:05,689 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 181 predicate places. [2024-06-20 16:35:05,689 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 166 transitions, 1433 flow [2024-06-20 16:35:05,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:05,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:05,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:05,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 16:35:05,690 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:05,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:05,691 INFO L85 PathProgramCache]: Analyzing trace with hash 28848484, now seen corresponding path program 3 times [2024-06-20 16:35:05,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:05,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747651045] [2024-06-20 16:35:05,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:05,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:05,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:06,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:06,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:06,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747651045] [2024-06-20 16:35:06,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747651045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:06,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:06,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:35:06,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115832763] [2024-06-20 16:35:06,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:06,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:35:06,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:06,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:35:06,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:35:06,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:06,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 166 transitions, 1433 flow. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:06,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:06,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:06,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:07,086 INFO L124 PetriNetUnfolderBase]: 497/930 cut-off events. [2024-06-20 16:35:07,087 INFO L125 PetriNetUnfolderBase]: For 73731/73735 co-relation queries the response was YES. [2024-06-20 16:35:07,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5544 conditions, 930 events. 497/930 cut-off events. For 73731/73735 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4662 event pairs, 81 based on Foata normal form. 3/932 useless extension candidates. Maximal degree in co-relation 5444. Up to 519 conditions per place. [2024-06-20 16:35:07,098 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 109 selfloop transitions, 81 changer transitions 0/192 dead transitions. [2024-06-20 16:35:07,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 192 transitions, 2057 flow [2024-06-20 16:35:07,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:35:07,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:35:07,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 139 transitions. [2024-06-20 16:35:07,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3736559139784946 [2024-06-20 16:35:07,099 INFO L175 Difference]: Start difference. First operand has 211 places, 166 transitions, 1433 flow. Second operand 12 states and 139 transitions. [2024-06-20 16:35:07,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 192 transitions, 2057 flow [2024-06-20 16:35:07,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 192 transitions, 1973 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-20 16:35:07,258 INFO L231 Difference]: Finished difference. Result has 213 places, 167 transitions, 1533 flow [2024-06-20 16:35:07,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1349, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1533, PETRI_PLACES=213, PETRI_TRANSITIONS=167} [2024-06-20 16:35:07,259 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 183 predicate places. [2024-06-20 16:35:07,259 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 167 transitions, 1533 flow [2024-06-20 16:35:07,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:07,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:07,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:07,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 16:35:07,260 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:07,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:07,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1127293376, now seen corresponding path program 14 times [2024-06-20 16:35:07,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:07,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256182801] [2024-06-20 16:35:07,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:07,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:07,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:08,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:08,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:08,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256182801] [2024-06-20 16:35:08,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256182801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:08,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:08,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:35:08,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137650997] [2024-06-20 16:35:08,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:08,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:35:08,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:08,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:35:08,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:35:08,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:08,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 167 transitions, 1533 flow. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:08,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:08,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:08,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:08,705 INFO L124 PetriNetUnfolderBase]: 494/925 cut-off events. [2024-06-20 16:35:08,706 INFO L125 PetriNetUnfolderBase]: For 70662/70666 co-relation queries the response was YES. [2024-06-20 16:35:08,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5513 conditions, 925 events. 494/925 cut-off events. For 70662/70666 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4648 event pairs, 90 based on Foata normal form. 3/927 useless extension candidates. Maximal degree in co-relation 5412. Up to 716 conditions per place. [2024-06-20 16:35:08,716 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 125 selfloop transitions, 55 changer transitions 0/182 dead transitions. [2024-06-20 16:35:08,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 182 transitions, 1937 flow [2024-06-20 16:35:08,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:08,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:08,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-20 16:35:08,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-20 16:35:08,717 INFO L175 Difference]: Start difference. First operand has 213 places, 167 transitions, 1533 flow. Second operand 10 states and 110 transitions. [2024-06-20 16:35:08,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 182 transitions, 1937 flow [2024-06-20 16:35:08,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 182 transitions, 1745 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-20 16:35:08,844 INFO L231 Difference]: Finished difference. Result has 213 places, 167 transitions, 1455 flow [2024-06-20 16:35:08,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1341, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1455, PETRI_PLACES=213, PETRI_TRANSITIONS=167} [2024-06-20 16:35:08,845 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 183 predicate places. [2024-06-20 16:35:08,845 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 167 transitions, 1455 flow [2024-06-20 16:35:08,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:08,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:08,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:08,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 16:35:08,845 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:08,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:08,846 INFO L85 PathProgramCache]: Analyzing trace with hash -266726906, now seen corresponding path program 4 times [2024-06-20 16:35:08,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:08,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724138009] [2024-06-20 16:35:08,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:08,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:08,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:09,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:09,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:09,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724138009] [2024-06-20 16:35:09,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724138009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:09,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:09,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:35:09,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691481450] [2024-06-20 16:35:09,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:09,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:35:09,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:09,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:35:09,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:35:09,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:09,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 167 transitions, 1455 flow. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:09,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:09,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:09,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:10,158 INFO L124 PetriNetUnfolderBase]: 462/861 cut-off events. [2024-06-20 16:35:10,158 INFO L125 PetriNetUnfolderBase]: For 39581/39585 co-relation queries the response was YES. [2024-06-20 16:35:10,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4338 conditions, 861 events. 462/861 cut-off events. For 39581/39585 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4327 event pairs, 100 based on Foata normal form. 6/866 useless extension candidates. Maximal degree in co-relation 4236. Up to 777 conditions per place. [2024-06-20 16:35:10,164 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 144 selfloop transitions, 34 changer transitions 0/180 dead transitions. [2024-06-20 16:35:10,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 180 transitions, 1847 flow [2024-06-20 16:35:10,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:35:10,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:35:10,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 112 transitions. [2024-06-20 16:35:10,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3284457478005865 [2024-06-20 16:35:10,165 INFO L175 Difference]: Start difference. First operand has 213 places, 167 transitions, 1455 flow. Second operand 11 states and 112 transitions. [2024-06-20 16:35:10,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 180 transitions, 1847 flow [2024-06-20 16:35:10,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 180 transitions, 1686 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 16:35:10,271 INFO L231 Difference]: Finished difference. Result has 215 places, 168 transitions, 1377 flow [2024-06-20 16:35:10,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1294, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1377, PETRI_PLACES=215, PETRI_TRANSITIONS=168} [2024-06-20 16:35:10,272 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 185 predicate places. [2024-06-20 16:35:10,272 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 168 transitions, 1377 flow [2024-06-20 16:35:10,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:10,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:10,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:10,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 16:35:10,272 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:10,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:10,273 INFO L85 PathProgramCache]: Analyzing trace with hash -983332290, now seen corresponding path program 1 times [2024-06-20 16:35:10,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:10,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015035430] [2024-06-20 16:35:10,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:10,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:10,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:11,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:11,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:11,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015035430] [2024-06-20 16:35:11,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015035430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:11,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:11,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:35:11,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48667173] [2024-06-20 16:35:11,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:11,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:35:11,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:11,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:35:11,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:35:11,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:11,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 168 transitions, 1377 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:11,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:11,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:11,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:11,368 INFO L124 PetriNetUnfolderBase]: 466/869 cut-off events. [2024-06-20 16:35:11,368 INFO L125 PetriNetUnfolderBase]: For 40399/40403 co-relation queries the response was YES. [2024-06-20 16:35:11,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4248 conditions, 869 events. 466/869 cut-off events. For 40399/40403 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4375 event pairs, 71 based on Foata normal form. 6/874 useless extension candidates. Maximal degree in co-relation 4144. Up to 738 conditions per place. [2024-06-20 16:35:11,373 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 163 selfloop transitions, 21 changer transitions 0/186 dead transitions. [2024-06-20 16:35:11,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 186 transitions, 1793 flow [2024-06-20 16:35:11,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:11,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:11,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 99 transitions. [2024-06-20 16:35:11,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3193548387096774 [2024-06-20 16:35:11,375 INFO L175 Difference]: Start difference. First operand has 215 places, 168 transitions, 1377 flow. Second operand 10 states and 99 transitions. [2024-06-20 16:35:11,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 186 transitions, 1793 flow [2024-06-20 16:35:11,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 186 transitions, 1668 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-20 16:35:11,472 INFO L231 Difference]: Finished difference. Result has 216 places, 169 transitions, 1306 flow [2024-06-20 16:35:11,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1252, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1306, PETRI_PLACES=216, PETRI_TRANSITIONS=169} [2024-06-20 16:35:11,473 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 186 predicate places. [2024-06-20 16:35:11,473 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 169 transitions, 1306 flow [2024-06-20 16:35:11,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:11,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:11,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:11,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 16:35:11,473 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:11,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:11,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1919533984, now seen corresponding path program 2 times [2024-06-20 16:35:11,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:11,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331134443] [2024-06-20 16:35:11,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:11,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:11,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:12,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:12,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:12,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331134443] [2024-06-20 16:35:12,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331134443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:12,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:12,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:35:12,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840627053] [2024-06-20 16:35:12,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:12,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:35:12,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:12,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:35:12,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:35:12,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:12,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 169 transitions, 1306 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:12,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:12,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:12,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:12,755 INFO L124 PetriNetUnfolderBase]: 477/890 cut-off events. [2024-06-20 16:35:12,755 INFO L125 PetriNetUnfolderBase]: For 46831/46835 co-relation queries the response was YES. [2024-06-20 16:35:12,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4376 conditions, 890 events. 477/890 cut-off events. For 46831/46835 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 4514 event pairs, 92 based on Foata normal form. 6/895 useless extension candidates. Maximal degree in co-relation 4272. Up to 746 conditions per place. [2024-06-20 16:35:12,765 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 160 selfloop transitions, 27 changer transitions 0/189 dead transitions. [2024-06-20 16:35:12,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 189 transitions, 1896 flow [2024-06-20 16:35:12,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:12,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:12,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2024-06-20 16:35:12,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3419354838709677 [2024-06-20 16:35:12,766 INFO L175 Difference]: Start difference. First operand has 216 places, 169 transitions, 1306 flow. Second operand 10 states and 106 transitions. [2024-06-20 16:35:12,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 189 transitions, 1896 flow [2024-06-20 16:35:12,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 189 transitions, 1828 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-20 16:35:12,881 INFO L231 Difference]: Finished difference. Result has 217 places, 171 transitions, 1314 flow [2024-06-20 16:35:12,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1242, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1314, PETRI_PLACES=217, PETRI_TRANSITIONS=171} [2024-06-20 16:35:12,881 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 187 predicate places. [2024-06-20 16:35:12,881 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 171 transitions, 1314 flow [2024-06-20 16:35:12,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:12,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:12,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:12,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 16:35:12,882 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:12,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:12,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1919678134, now seen corresponding path program 3 times [2024-06-20 16:35:12,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:12,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260614973] [2024-06-20 16:35:12,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:12,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:12,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:13,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:13,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:13,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260614973] [2024-06-20 16:35:13,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260614973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:13,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:13,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:35:13,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113923644] [2024-06-20 16:35:13,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:13,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:35:13,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:13,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:35:13,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:35:13,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:13,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 171 transitions, 1314 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:13,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:13,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:13,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:14,211 INFO L124 PetriNetUnfolderBase]: 481/898 cut-off events. [2024-06-20 16:35:14,211 INFO L125 PetriNetUnfolderBase]: For 48146/48150 co-relation queries the response was YES. [2024-06-20 16:35:14,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4374 conditions, 898 events. 481/898 cut-off events. For 48146/48150 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 4558 event pairs, 94 based on Foata normal form. 6/903 useless extension candidates. Maximal degree in co-relation 4270. Up to 774 conditions per place. [2024-06-20 16:35:14,217 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 160 selfloop transitions, 28 changer transitions 0/190 dead transitions. [2024-06-20 16:35:14,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 190 transitions, 1902 flow [2024-06-20 16:35:14,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:14,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:14,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 105 transitions. [2024-06-20 16:35:14,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3387096774193548 [2024-06-20 16:35:14,218 INFO L175 Difference]: Start difference. First operand has 217 places, 171 transitions, 1314 flow. Second operand 10 states and 105 transitions. [2024-06-20 16:35:14,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 190 transitions, 1902 flow [2024-06-20 16:35:14,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 190 transitions, 1860 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 16:35:14,338 INFO L231 Difference]: Finished difference. Result has 221 places, 172 transitions, 1340 flow [2024-06-20 16:35:14,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1274, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1340, PETRI_PLACES=221, PETRI_TRANSITIONS=172} [2024-06-20 16:35:14,338 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 191 predicate places. [2024-06-20 16:35:14,338 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 172 transitions, 1340 flow [2024-06-20 16:35:14,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:14,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:14,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:14,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 16:35:14,339 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:14,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:14,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1915959064, now seen corresponding path program 4 times [2024-06-20 16:35:14,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:14,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197531508] [2024-06-20 16:35:14,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:14,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:14,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:15,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:15,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:15,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197531508] [2024-06-20 16:35:15,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197531508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:15,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:15,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:35:15,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427167978] [2024-06-20 16:35:15,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:15,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:35:15,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:15,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:35:15,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:35:15,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:15,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 172 transitions, 1340 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:15,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:15,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:15,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:15,579 INFO L124 PetriNetUnfolderBase]: 485/906 cut-off events. [2024-06-20 16:35:15,579 INFO L125 PetriNetUnfolderBase]: For 49502/49506 co-relation queries the response was YES. [2024-06-20 16:35:15,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4450 conditions, 906 events. 485/906 cut-off events. For 49502/49506 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 4605 event pairs, 96 based on Foata normal form. 6/911 useless extension candidates. Maximal degree in co-relation 4344. Up to 726 conditions per place. [2024-06-20 16:35:15,585 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 161 selfloop transitions, 28 changer transitions 0/191 dead transitions. [2024-06-20 16:35:15,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 191 transitions, 1928 flow [2024-06-20 16:35:15,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:15,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:15,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 107 transitions. [2024-06-20 16:35:15,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34516129032258064 [2024-06-20 16:35:15,586 INFO L175 Difference]: Start difference. First operand has 221 places, 172 transitions, 1340 flow. Second operand 10 states and 107 transitions. [2024-06-20 16:35:15,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 191 transitions, 1928 flow [2024-06-20 16:35:15,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 191 transitions, 1869 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-20 16:35:15,725 INFO L231 Difference]: Finished difference. Result has 223 places, 173 transitions, 1351 flow [2024-06-20 16:35:15,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1281, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1351, PETRI_PLACES=223, PETRI_TRANSITIONS=173} [2024-06-20 16:35:15,725 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 193 predicate places. [2024-06-20 16:35:15,725 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 173 transitions, 1351 flow [2024-06-20 16:35:15,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:15,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:15,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:15,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 16:35:15,726 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:15,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:15,726 INFO L85 PathProgramCache]: Analyzing trace with hash 821258310, now seen corresponding path program 5 times [2024-06-20 16:35:15,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:15,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521255212] [2024-06-20 16:35:15,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:15,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:15,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:16,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:16,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:16,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521255212] [2024-06-20 16:35:16,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521255212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:16,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:16,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:35:16,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626103243] [2024-06-20 16:35:16,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:16,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:35:16,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:16,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:35:16,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:35:16,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:16,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 173 transitions, 1351 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:16,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:16,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:16,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:16,853 INFO L124 PetriNetUnfolderBase]: 482/901 cut-off events. [2024-06-20 16:35:16,854 INFO L125 PetriNetUnfolderBase]: For 44570/44574 co-relation queries the response was YES. [2024-06-20 16:35:16,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4301 conditions, 901 events. 482/901 cut-off events. For 44570/44574 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 4603 event pairs, 95 based on Foata normal form. 6/906 useless extension candidates. Maximal degree in co-relation 4194. Up to 796 conditions per place. [2024-06-20 16:35:16,864 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 160 selfloop transitions, 28 changer transitions 0/190 dead transitions. [2024-06-20 16:35:16,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 190 transitions, 1777 flow [2024-06-20 16:35:16,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:16,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:16,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 103 transitions. [2024-06-20 16:35:16,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33225806451612905 [2024-06-20 16:35:16,865 INFO L175 Difference]: Start difference. First operand has 223 places, 173 transitions, 1351 flow. Second operand 10 states and 103 transitions. [2024-06-20 16:35:16,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 190 transitions, 1777 flow [2024-06-20 16:35:17,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 190 transitions, 1715 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-20 16:35:17,011 INFO L231 Difference]: Finished difference. Result has 225 places, 173 transitions, 1350 flow [2024-06-20 16:35:17,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1289, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1350, PETRI_PLACES=225, PETRI_TRANSITIONS=173} [2024-06-20 16:35:17,011 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 195 predicate places. [2024-06-20 16:35:17,011 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 173 transitions, 1350 flow [2024-06-20 16:35:17,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:17,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:17,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:17,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 16:35:17,012 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:17,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:17,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1866600990, now seen corresponding path program 6 times [2024-06-20 16:35:17,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:17,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612647644] [2024-06-20 16:35:17,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:17,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:17,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:17,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:17,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:17,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612647644] [2024-06-20 16:35:17,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612647644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:17,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:17,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:35:17,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675852670] [2024-06-20 16:35:17,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:17,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:35:17,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:17,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:35:17,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:35:17,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:17,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 173 transitions, 1350 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) [2024-06-20 16:35:17,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:17,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:17,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:18,182 INFO L124 PetriNetUnfolderBase]: 502/945 cut-off events. [2024-06-20 16:35:18,182 INFO L125 PetriNetUnfolderBase]: For 77426/77430 co-relation queries the response was YES. [2024-06-20 16:35:18,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4436 conditions, 945 events. 502/945 cut-off events. For 77426/77430 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 4852 event pairs, 88 based on Foata normal form. 13/957 useless extension candidates. Maximal degree in co-relation 4328. Up to 519 conditions per place. [2024-06-20 16:35:18,193 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 105 selfloop transitions, 80 changer transitions 7/194 dead transitions. [2024-06-20 16:35:18,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 194 transitions, 1816 flow [2024-06-20 16:35:18,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:18,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:18,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-06-20 16:35:18,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-20 16:35:18,194 INFO L175 Difference]: Start difference. First operand has 225 places, 173 transitions, 1350 flow. Second operand 10 states and 120 transitions. [2024-06-20 16:35:18,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 194 transitions, 1816 flow [2024-06-20 16:35:18,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 194 transitions, 1757 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-20 16:35:18,327 INFO L231 Difference]: Finished difference. Result has 226 places, 171 transitions, 1448 flow [2024-06-20 16:35:18,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1291, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1448, PETRI_PLACES=226, PETRI_TRANSITIONS=171} [2024-06-20 16:35:18,327 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 196 predicate places. [2024-06-20 16:35:18,327 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 171 transitions, 1448 flow [2024-06-20 16:35:18,327 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) [2024-06-20 16:35:18,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:18,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:18,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 16:35:18,328 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:18,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:18,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1866877696, now seen corresponding path program 1 times [2024-06-20 16:35:18,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:18,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689683027] [2024-06-20 16:35:18,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:18,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:18,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:19,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:19,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:19,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689683027] [2024-06-20 16:35:19,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689683027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:19,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:19,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:35:19,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826740040] [2024-06-20 16:35:19,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:19,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:35:19,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:19,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:35:19,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:35:19,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:19,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 171 transitions, 1448 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) [2024-06-20 16:35:19,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:19,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:19,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:19,421 INFO L124 PetriNetUnfolderBase]: 512/971 cut-off events. [2024-06-20 16:35:19,421 INFO L125 PetriNetUnfolderBase]: For 92578/92582 co-relation queries the response was YES. [2024-06-20 16:35:19,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5301 conditions, 971 events. 512/971 cut-off events. For 92578/92582 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 5012 event pairs, 92 based on Foata normal form. 9/979 useless extension candidates. Maximal degree in co-relation 5192. Up to 481 conditions per place. [2024-06-20 16:35:19,429 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 107 selfloop transitions, 79 changer transitions 6/194 dead transitions. [2024-06-20 16:35:19,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 194 transitions, 2080 flow [2024-06-20 16:35:19,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:19,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:19,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2024-06-20 16:35:19,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3903225806451613 [2024-06-20 16:35:19,431 INFO L175 Difference]: Start difference. First operand has 226 places, 171 transitions, 1448 flow. Second operand 10 states and 121 transitions. [2024-06-20 16:35:19,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 194 transitions, 2080 flow [2024-06-20 16:35:19,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 194 transitions, 1900 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-20 16:35:19,617 INFO L231 Difference]: Finished difference. Result has 227 places, 170 transitions, 1423 flow [2024-06-20 16:35:19,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1268, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1423, PETRI_PLACES=227, PETRI_TRANSITIONS=170} [2024-06-20 16:35:19,617 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 197 predicate places. [2024-06-20 16:35:19,617 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 170 transitions, 1423 flow [2024-06-20 16:35:19,618 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) [2024-06-20 16:35:19,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:19,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:19,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 16:35:19,618 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:19,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:19,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1905739706, now seen corresponding path program 7 times [2024-06-20 16:35:19,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:19,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205249596] [2024-06-20 16:35:19,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:19,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:19,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:20,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:20,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:20,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205249596] [2024-06-20 16:35:20,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205249596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:20,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:20,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:35:20,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910211974] [2024-06-20 16:35:20,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:20,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:35:20,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:20,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:35:20,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:35:20,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:20,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 170 transitions, 1423 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:20,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:20,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:20,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:20,961 INFO L124 PetriNetUnfolderBase]: 500/947 cut-off events. [2024-06-20 16:35:20,961 INFO L125 PetriNetUnfolderBase]: For 74886/74890 co-relation queries the response was YES. [2024-06-20 16:35:20,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5224 conditions, 947 events. 500/947 cut-off events. For 74886/74890 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 4886 event pairs, 94 based on Foata normal form. 3/949 useless extension candidates. Maximal degree in co-relation 5114. Up to 569 conditions per place. [2024-06-20 16:35:20,968 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 109 selfloop transitions, 76 changer transitions 0/187 dead transitions. [2024-06-20 16:35:20,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 187 transitions, 1853 flow [2024-06-20 16:35:20,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:20,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:20,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-06-20 16:35:20,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36774193548387096 [2024-06-20 16:35:20,970 INFO L175 Difference]: Start difference. First operand has 227 places, 170 transitions, 1423 flow. Second operand 10 states and 114 transitions. [2024-06-20 16:35:20,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 187 transitions, 1853 flow [2024-06-20 16:35:21,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 187 transitions, 1693 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-20 16:35:21,158 INFO L231 Difference]: Finished difference. Result has 227 places, 171 transitions, 1433 flow [2024-06-20 16:35:21,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1263, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1433, PETRI_PLACES=227, PETRI_TRANSITIONS=171} [2024-06-20 16:35:21,159 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 197 predicate places. [2024-06-20 16:35:21,159 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 171 transitions, 1433 flow [2024-06-20 16:35:21,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:21,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:21,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:21,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 16:35:21,159 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:21,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:21,160 INFO L85 PathProgramCache]: Analyzing trace with hash -807319882, now seen corresponding path program 8 times [2024-06-20 16:35:21,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:21,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681726538] [2024-06-20 16:35:21,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:21,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:21,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:22,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:22,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:22,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681726538] [2024-06-20 16:35:22,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681726538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:22,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:22,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:35:22,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738521105] [2024-06-20 16:35:22,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:22,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:35:22,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:22,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:35:22,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:35:22,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:22,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 171 transitions, 1433 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:22,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:22,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:22,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:22,417 INFO L124 PetriNetUnfolderBase]: 482/909 cut-off events. [2024-06-20 16:35:22,417 INFO L125 PetriNetUnfolderBase]: For 48128/48132 co-relation queries the response was YES. [2024-06-20 16:35:22,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4470 conditions, 909 events. 482/909 cut-off events. For 48128/48132 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 4675 event pairs, 80 based on Foata normal form. 3/911 useless extension candidates. Maximal degree in co-relation 4360. Up to 511 conditions per place. [2024-06-20 16:35:22,424 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 108 selfloop transitions, 78 changer transitions 0/188 dead transitions. [2024-06-20 16:35:22,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 188 transitions, 1865 flow [2024-06-20 16:35:22,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:22,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:22,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-20 16:35:22,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-20 16:35:22,425 INFO L175 Difference]: Start difference. First operand has 227 places, 171 transitions, 1433 flow. Second operand 10 states and 115 transitions. [2024-06-20 16:35:22,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 188 transitions, 1865 flow [2024-06-20 16:35:22,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 188 transitions, 1705 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-20 16:35:22,544 INFO L231 Difference]: Finished difference. Result has 229 places, 172 transitions, 1449 flow [2024-06-20 16:35:22,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1273, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1449, PETRI_PLACES=229, PETRI_TRANSITIONS=172} [2024-06-20 16:35:22,544 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 199 predicate places. [2024-06-20 16:35:22,545 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 172 transitions, 1449 flow [2024-06-20 16:35:22,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:22,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:22,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:22,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 16:35:22,545 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:22,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:22,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1006616092, now seen corresponding path program 9 times [2024-06-20 16:35:22,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:22,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683901016] [2024-06-20 16:35:22,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:22,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:22,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:23,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:23,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:23,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683901016] [2024-06-20 16:35:23,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683901016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:23,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:23,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:35:23,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489738878] [2024-06-20 16:35:23,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:23,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:35:23,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:23,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:35:23,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:35:23,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:23,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 172 transitions, 1449 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:23,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:23,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:23,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:23,874 INFO L124 PetriNetUnfolderBase]: 486/917 cut-off events. [2024-06-20 16:35:23,874 INFO L125 PetriNetUnfolderBase]: For 49347/49351 co-relation queries the response was YES. [2024-06-20 16:35:23,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4527 conditions, 917 events. 486/917 cut-off events. For 49347/49351 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 4711 event pairs, 84 based on Foata normal form. 3/919 useless extension candidates. Maximal degree in co-relation 4416. Up to 539 conditions per place. [2024-06-20 16:35:23,881 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 114 selfloop transitions, 73 changer transitions 0/189 dead transitions. [2024-06-20 16:35:23,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 189 transitions, 1887 flow [2024-06-20 16:35:23,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:23,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:23,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-06-20 16:35:23,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36774193548387096 [2024-06-20 16:35:23,882 INFO L175 Difference]: Start difference. First operand has 229 places, 172 transitions, 1449 flow. Second operand 10 states and 114 transitions. [2024-06-20 16:35:23,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 189 transitions, 1887 flow [2024-06-20 16:35:24,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 189 transitions, 1721 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-20 16:35:24,014 INFO L231 Difference]: Finished difference. Result has 231 places, 173 transitions, 1451 flow [2024-06-20 16:35:24,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1283, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1451, PETRI_PLACES=231, PETRI_TRANSITIONS=173} [2024-06-20 16:35:24,015 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 201 predicate places. [2024-06-20 16:35:24,015 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 173 transitions, 1451 flow [2024-06-20 16:35:24,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:24,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:24,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:24,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 16:35:24,016 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:24,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:24,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1536599922, now seen corresponding path program 10 times [2024-06-20 16:35:24,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:24,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183580385] [2024-06-20 16:35:24,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:24,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:24,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:24,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:24,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:24,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183580385] [2024-06-20 16:35:24,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183580385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:24,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:24,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:35:24,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223493436] [2024-06-20 16:35:24,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:24,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:35:24,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:24,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:35:24,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:35:24,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:24,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 173 transitions, 1451 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) [2024-06-20 16:35:24,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:24,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:24,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:25,234 INFO L124 PetriNetUnfolderBase]: 490/925 cut-off events. [2024-06-20 16:35:25,234 INFO L125 PetriNetUnfolderBase]: For 50532/50536 co-relation queries the response was YES. [2024-06-20 16:35:25,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4558 conditions, 925 events. 490/925 cut-off events. For 50532/50536 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 4780 event pairs, 84 based on Foata normal form. 3/927 useless extension candidates. Maximal degree in co-relation 4446. Up to 533 conditions per place. [2024-06-20 16:35:25,244 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 114 selfloop transitions, 74 changer transitions 0/190 dead transitions. [2024-06-20 16:35:25,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 190 transitions, 1891 flow [2024-06-20 16:35:25,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:25,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:25,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-20 16:35:25,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-20 16:35:25,246 INFO L175 Difference]: Start difference. First operand has 231 places, 173 transitions, 1451 flow. Second operand 10 states and 115 transitions. [2024-06-20 16:35:25,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 190 transitions, 1891 flow [2024-06-20 16:35:25,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 190 transitions, 1733 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-20 16:35:25,405 INFO L231 Difference]: Finished difference. Result has 233 places, 174 transitions, 1465 flow [2024-06-20 16:35:25,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1293, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1465, PETRI_PLACES=233, PETRI_TRANSITIONS=174} [2024-06-20 16:35:25,406 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 203 predicate places. [2024-06-20 16:35:25,406 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 174 transitions, 1465 flow [2024-06-20 16:35:25,406 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) [2024-06-20 16:35:25,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:25,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:25,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 16:35:25,406 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:25,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:25,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1536744072, now seen corresponding path program 11 times [2024-06-20 16:35:25,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:25,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922690810] [2024-06-20 16:35:25,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:25,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:25,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:26,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:26,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:26,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922690810] [2024-06-20 16:35:26,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922690810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:26,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:26,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:35:26,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295881216] [2024-06-20 16:35:26,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:26,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:35:26,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:26,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:35:26,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:35:26,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:26,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 174 transitions, 1465 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:26,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:26,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:26,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:26,656 INFO L124 PetriNetUnfolderBase]: 494/933 cut-off events. [2024-06-20 16:35:26,657 INFO L125 PetriNetUnfolderBase]: For 51899/51903 co-relation queries the response was YES. [2024-06-20 16:35:26,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4611 conditions, 933 events. 494/933 cut-off events. For 51899/51903 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 4862 event pairs, 86 based on Foata normal form. 3/935 useless extension candidates. Maximal degree in co-relation 4498. Up to 493 conditions per place. [2024-06-20 16:35:26,664 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 111 selfloop transitions, 78 changer transitions 0/191 dead transitions. [2024-06-20 16:35:26,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 191 transitions, 1907 flow [2024-06-20 16:35:26,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:26,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:26,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-20 16:35:26,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-20 16:35:26,665 INFO L175 Difference]: Start difference. First operand has 233 places, 174 transitions, 1465 flow. Second operand 10 states and 115 transitions. [2024-06-20 16:35:26,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 191 transitions, 1907 flow [2024-06-20 16:35:26,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 191 transitions, 1745 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-20 16:35:26,803 INFO L231 Difference]: Finished difference. Result has 235 places, 175 transitions, 1485 flow [2024-06-20 16:35:26,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1303, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1485, PETRI_PLACES=235, PETRI_TRANSITIONS=175} [2024-06-20 16:35:26,804 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 205 predicate places. [2024-06-20 16:35:26,804 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 175 transitions, 1485 flow [2024-06-20 16:35:26,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:26,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:26,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:26,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 16:35:26,804 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:26,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:26,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1761564920, now seen corresponding path program 12 times [2024-06-20 16:35:26,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:26,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076652028] [2024-06-20 16:35:26,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:26,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:26,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:27,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:27,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076652028] [2024-06-20 16:35:27,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076652028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:27,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:27,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:35:27,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514560921] [2024-06-20 16:35:27,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:27,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:35:27,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:27,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:35:27,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:35:27,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:27,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 175 transitions, 1485 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:27,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:27,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:27,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:28,191 INFO L124 PetriNetUnfolderBase]: 498/941 cut-off events. [2024-06-20 16:35:28,192 INFO L125 PetriNetUnfolderBase]: For 53254/53258 co-relation queries the response was YES. [2024-06-20 16:35:28,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4678 conditions, 941 events. 498/941 cut-off events. For 53254/53258 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 4917 event pairs, 92 based on Foata normal form. 3/943 useless extension candidates. Maximal degree in co-relation 4564. Up to 563 conditions per place. [2024-06-20 16:35:28,197 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 110 selfloop transitions, 80 changer transitions 0/192 dead transitions. [2024-06-20 16:35:28,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 192 transitions, 1935 flow [2024-06-20 16:35:28,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:28,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:28,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-06-20 16:35:28,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36129032258064514 [2024-06-20 16:35:28,198 INFO L175 Difference]: Start difference. First operand has 235 places, 175 transitions, 1485 flow. Second operand 10 states and 112 transitions. [2024-06-20 16:35:28,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 192 transitions, 1935 flow [2024-06-20 16:35:28,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 192 transitions, 1763 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-20 16:35:28,342 INFO L231 Difference]: Finished difference. Result has 237 places, 176 transitions, 1501 flow [2024-06-20 16:35:28,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1313, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1501, PETRI_PLACES=237, PETRI_TRANSITIONS=176} [2024-06-20 16:35:28,342 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 207 predicate places. [2024-06-20 16:35:28,342 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 176 transitions, 1501 flow [2024-06-20 16:35:28,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:28,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:28,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:28,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 16:35:28,343 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:28,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:28,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1761559340, now seen corresponding path program 13 times [2024-06-20 16:35:28,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:28,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361336165] [2024-06-20 16:35:28,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:28,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:28,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:29,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:29,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:29,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361336165] [2024-06-20 16:35:29,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361336165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:29,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:29,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:35:29,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189404255] [2024-06-20 16:35:29,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:29,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:35:29,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:29,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:35:29,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:35:29,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:29,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 176 transitions, 1501 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:29,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:29,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:29,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:29,583 INFO L124 PetriNetUnfolderBase]: 502/949 cut-off events. [2024-06-20 16:35:29,583 INFO L125 PetriNetUnfolderBase]: For 54526/54530 co-relation queries the response was YES. [2024-06-20 16:35:29,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4735 conditions, 949 events. 502/949 cut-off events. For 54526/54530 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 4980 event pairs, 92 based on Foata normal form. 3/951 useless extension candidates. Maximal degree in co-relation 4620. Up to 557 conditions per place. [2024-06-20 16:35:29,591 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 110 selfloop transitions, 81 changer transitions 0/193 dead transitions. [2024-06-20 16:35:29,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 193 transitions, 1953 flow [2024-06-20 16:35:29,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:29,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:29,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-20 16:35:29,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36451612903225805 [2024-06-20 16:35:29,592 INFO L175 Difference]: Start difference. First operand has 237 places, 176 transitions, 1501 flow. Second operand 10 states and 113 transitions. [2024-06-20 16:35:29,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 193 transitions, 1953 flow [2024-06-20 16:35:29,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 193 transitions, 1775 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-20 16:35:29,746 INFO L231 Difference]: Finished difference. Result has 239 places, 177 transitions, 1515 flow [2024-06-20 16:35:29,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1323, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1515, PETRI_PLACES=239, PETRI_TRANSITIONS=177} [2024-06-20 16:35:29,746 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 209 predicate places. [2024-06-20 16:35:29,746 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 177 transitions, 1515 flow [2024-06-20 16:35:29,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:29,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:29,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:29,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 16:35:29,747 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:29,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:29,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1761415190, now seen corresponding path program 14 times [2024-06-20 16:35:29,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:29,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220190768] [2024-06-20 16:35:29,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:29,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:29,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:30,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:30,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:30,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220190768] [2024-06-20 16:35:30,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220190768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:30,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:30,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:35:30,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828133737] [2024-06-20 16:35:30,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:30,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:35:30,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:30,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:35:30,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:35:30,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:30,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 177 transitions, 1515 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) [2024-06-20 16:35:30,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:30,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:30,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:31,062 INFO L124 PetriNetUnfolderBase]: 506/957 cut-off events. [2024-06-20 16:35:31,062 INFO L125 PetriNetUnfolderBase]: For 55854/55858 co-relation queries the response was YES. [2024-06-20 16:35:31,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4788 conditions, 957 events. 506/957 cut-off events. For 55854/55858 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5014 event pairs, 92 based on Foata normal form. 3/959 useless extension candidates. Maximal degree in co-relation 4672. Up to 543 conditions per place. [2024-06-20 16:35:31,069 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 110 selfloop transitions, 82 changer transitions 0/194 dead transitions. [2024-06-20 16:35:31,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 194 transitions, 1969 flow [2024-06-20 16:35:31,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:31,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:31,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-06-20 16:35:31,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36774193548387096 [2024-06-20 16:35:31,070 INFO L175 Difference]: Start difference. First operand has 239 places, 177 transitions, 1515 flow. Second operand 10 states and 114 transitions. [2024-06-20 16:35:31,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 194 transitions, 1969 flow [2024-06-20 16:35:31,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 194 transitions, 1787 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-20 16:35:31,220 INFO L231 Difference]: Finished difference. Result has 241 places, 178 transitions, 1529 flow [2024-06-20 16:35:31,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1333, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1529, PETRI_PLACES=241, PETRI_TRANSITIONS=178} [2024-06-20 16:35:31,220 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 211 predicate places. [2024-06-20 16:35:31,220 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 178 transitions, 1529 flow [2024-06-20 16:35:31,220 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) [2024-06-20 16:35:31,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:31,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:31,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 16:35:31,220 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:31,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:31,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1757840270, now seen corresponding path program 15 times [2024-06-20 16:35:31,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:31,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444105211] [2024-06-20 16:35:31,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:31,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:31,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:31,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:31,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:31,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444105211] [2024-06-20 16:35:31,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444105211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:31,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:31,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:35:31,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701727167] [2024-06-20 16:35:31,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:31,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:35:31,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:31,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:35:31,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:35:32,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:32,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 178 transitions, 1529 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) [2024-06-20 16:35:32,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:32,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:32,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:32,349 INFO L124 PetriNetUnfolderBase]: 539/1024 cut-off events. [2024-06-20 16:35:32,349 INFO L125 PetriNetUnfolderBase]: For 96564/96568 co-relation queries the response was YES. [2024-06-20 16:35:32,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5899 conditions, 1024 events. 539/1024 cut-off events. For 96564/96568 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5394 event pairs, 111 based on Foata normal form. 3/1026 useless extension candidates. Maximal degree in co-relation 5782. Up to 358 conditions per place. [2024-06-20 16:35:32,357 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 108 selfloop transitions, 90 changer transitions 0/200 dead transitions. [2024-06-20 16:35:32,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 200 transitions, 2199 flow [2024-06-20 16:35:32,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:32,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:32,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 118 transitions. [2024-06-20 16:35:32,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38064516129032255 [2024-06-20 16:35:32,358 INFO L175 Difference]: Start difference. First operand has 241 places, 178 transitions, 1529 flow. Second operand 10 states and 118 transitions. [2024-06-20 16:35:32,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 200 transitions, 2199 flow [2024-06-20 16:35:32,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 200 transitions, 2013 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-20 16:35:32,545 INFO L231 Difference]: Finished difference. Result has 243 places, 179 transitions, 1555 flow [2024-06-20 16:35:32,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1343, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1555, PETRI_PLACES=243, PETRI_TRANSITIONS=179} [2024-06-20 16:35:32,545 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 213 predicate places. [2024-06-20 16:35:32,546 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 179 transitions, 1555 flow [2024-06-20 16:35:32,546 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) [2024-06-20 16:35:32,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:32,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:32,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 16:35:32,546 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:32,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:32,547 INFO L85 PathProgramCache]: Analyzing trace with hash 222477406, now seen corresponding path program 16 times [2024-06-20 16:35:32,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:32,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175474789] [2024-06-20 16:35:32,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:32,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:32,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:33,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:33,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:33,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175474789] [2024-06-20 16:35:33,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175474789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:33,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:33,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:35:33,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333644027] [2024-06-20 16:35:33,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:33,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:35:33,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:33,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:35:33,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:35:33,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:33,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 179 transitions, 1555 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:33,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:33,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:33,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:33,844 INFO L124 PetriNetUnfolderBase]: 543/1032 cut-off events. [2024-06-20 16:35:33,844 INFO L125 PetriNetUnfolderBase]: For 98919/98923 co-relation queries the response was YES. [2024-06-20 16:35:33,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5988 conditions, 1032 events. 543/1032 cut-off events. For 98919/98923 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5448 event pairs, 113 based on Foata normal form. 3/1034 useless extension candidates. Maximal degree in co-relation 5870. Up to 506 conditions per place. [2024-06-20 16:35:33,852 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 117 selfloop transitions, 82 changer transitions 0/201 dead transitions. [2024-06-20 16:35:33,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 201 transitions, 2233 flow [2024-06-20 16:35:33,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:33,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:33,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-20 16:35:33,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 16:35:33,854 INFO L175 Difference]: Start difference. First operand has 243 places, 179 transitions, 1555 flow. Second operand 10 states and 124 transitions. [2024-06-20 16:35:33,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 201 transitions, 2233 flow [2024-06-20 16:35:34,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 201 transitions, 2051 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-20 16:35:34,072 INFO L231 Difference]: Finished difference. Result has 245 places, 180 transitions, 1571 flow [2024-06-20 16:35:34,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1376, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1571, PETRI_PLACES=245, PETRI_TRANSITIONS=180} [2024-06-20 16:35:34,073 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 215 predicate places. [2024-06-20 16:35:34,073 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 180 transitions, 1571 flow [2024-06-20 16:35:34,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:34,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:34,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:34,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 16:35:34,073 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:34,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:34,073 INFO L85 PathProgramCache]: Analyzing trace with hash 222627136, now seen corresponding path program 17 times [2024-06-20 16:35:34,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:34,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602673548] [2024-06-20 16:35:34,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:34,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:34,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:35,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:35,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:35,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602673548] [2024-06-20 16:35:35,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602673548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:35,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:35,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:35:35,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473355074] [2024-06-20 16:35:35,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:35,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:35:35,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:35,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:35:35,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:35:35,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:35,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 180 transitions, 1571 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) [2024-06-20 16:35:35,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:35,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:35,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:35,405 INFO L124 PetriNetUnfolderBase]: 547/1040 cut-off events. [2024-06-20 16:35:35,405 INFO L125 PetriNetUnfolderBase]: For 101077/101081 co-relation queries the response was YES. [2024-06-20 16:35:35,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6016 conditions, 1040 events. 547/1040 cut-off events. For 101077/101081 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 5502 event pairs, 115 based on Foata normal form. 3/1042 useless extension candidates. Maximal degree in co-relation 5898. Up to 662 conditions per place. [2024-06-20 16:35:35,412 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 115 selfloop transitions, 80 changer transitions 0/197 dead transitions. [2024-06-20 16:35:35,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 197 transitions, 2038 flow [2024-06-20 16:35:35,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:35,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:35,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 118 transitions. [2024-06-20 16:35:35,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38064516129032255 [2024-06-20 16:35:35,413 INFO L175 Difference]: Start difference. First operand has 245 places, 180 transitions, 1571 flow. Second operand 10 states and 118 transitions. [2024-06-20 16:35:35,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 197 transitions, 2038 flow [2024-06-20 16:35:35,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 197 transitions, 1830 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-20 16:35:35,679 INFO L231 Difference]: Finished difference. Result has 247 places, 181 transitions, 1558 flow [2024-06-20 16:35:35,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1365, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1558, PETRI_PLACES=247, PETRI_TRANSITIONS=181} [2024-06-20 16:35:35,680 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 217 predicate places. [2024-06-20 16:35:35,680 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 181 transitions, 1558 flow [2024-06-20 16:35:35,680 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) [2024-06-20 16:35:35,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:35,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:35,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 16:35:35,680 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:35,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:35,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1440031132, now seen corresponding path program 18 times [2024-06-20 16:35:35,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:35,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89429300] [2024-06-20 16:35:35,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:35,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:35,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:36,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:36,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:36,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89429300] [2024-06-20 16:35:36,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89429300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:36,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:36,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:35:36,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386333054] [2024-06-20 16:35:36,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:36,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:35:36,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:36,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:35:36,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:35:36,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:36,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 181 transitions, 1558 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:36,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:36,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:36,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:37,078 INFO L124 PetriNetUnfolderBase]: 551/1048 cut-off events. [2024-06-20 16:35:37,079 INFO L125 PetriNetUnfolderBase]: For 103286/103290 co-relation queries the response was YES. [2024-06-20 16:35:37,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6039 conditions, 1048 events. 551/1048 cut-off events. For 103286/103290 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 5575 event pairs, 113 based on Foata normal form. 3/1050 useless extension candidates. Maximal degree in co-relation 5920. Up to 656 conditions per place. [2024-06-20 16:35:37,088 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 115 selfloop transitions, 81 changer transitions 0/198 dead transitions. [2024-06-20 16:35:37,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 198 transitions, 2025 flow [2024-06-20 16:35:37,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:37,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:37,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-20 16:35:37,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38387096774193546 [2024-06-20 16:35:37,090 INFO L175 Difference]: Start difference. First operand has 247 places, 181 transitions, 1558 flow. Second operand 10 states and 119 transitions. [2024-06-20 16:35:37,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 198 transitions, 2025 flow [2024-06-20 16:35:37,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 198 transitions, 1843 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-20 16:35:37,345 INFO L231 Difference]: Finished difference. Result has 249 places, 182 transitions, 1573 flow [2024-06-20 16:35:37,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1376, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1573, PETRI_PLACES=249, PETRI_TRANSITIONS=182} [2024-06-20 16:35:37,346 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 219 predicate places. [2024-06-20 16:35:37,346 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 182 transitions, 1573 flow [2024-06-20 16:35:37,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:37,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:37,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:37,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 16:35:37,346 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:37,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:37,346 INFO L85 PathProgramCache]: Analyzing trace with hash 228199262, now seen corresponding path program 2 times [2024-06-20 16:35:37,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:37,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329805076] [2024-06-20 16:35:37,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:37,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:37,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:38,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:38,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:38,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329805076] [2024-06-20 16:35:38,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329805076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:38,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:38,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:35:38,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143298621] [2024-06-20 16:35:38,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:38,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:35:38,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:38,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:35:38,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:35:38,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:38,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 182 transitions, 1573 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:38,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:38,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:38,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:38,682 INFO L124 PetriNetUnfolderBase]: 573/1094 cut-off events. [2024-06-20 16:35:38,682 INFO L125 PetriNetUnfolderBase]: For 139627/139631 co-relation queries the response was YES. [2024-06-20 16:35:38,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6178 conditions, 1094 events. 573/1094 cut-off events. For 139627/139631 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 5882 event pairs, 119 based on Foata normal form. 11/1104 useless extension candidates. Maximal degree in co-relation 6058. Up to 666 conditions per place. [2024-06-20 16:35:38,692 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 112 selfloop transitions, 76 changer transitions 16/206 dead transitions. [2024-06-20 16:35:38,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 206 transitions, 2075 flow [2024-06-20 16:35:38,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:35:38,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:35:38,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-06-20 16:35:38,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3841642228739003 [2024-06-20 16:35:38,693 INFO L175 Difference]: Start difference. First operand has 249 places, 182 transitions, 1573 flow. Second operand 11 states and 131 transitions. [2024-06-20 16:35:38,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 206 transitions, 2075 flow [2024-06-20 16:35:38,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 206 transitions, 1885 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-20 16:35:38,918 INFO L231 Difference]: Finished difference. Result has 252 places, 178 transitions, 1512 flow [2024-06-20 16:35:38,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1387, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1512, PETRI_PLACES=252, PETRI_TRANSITIONS=178} [2024-06-20 16:35:38,918 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 222 predicate places. [2024-06-20 16:35:38,918 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 178 transitions, 1512 flow [2024-06-20 16:35:38,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:38,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:38,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:38,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 16:35:38,919 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:38,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:38,920 INFO L85 PathProgramCache]: Analyzing trace with hash 421928926, now seen corresponding path program 19 times [2024-06-20 16:35:38,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:38,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520795516] [2024-06-20 16:35:38,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:38,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:38,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:39,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:39,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:39,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520795516] [2024-06-20 16:35:39,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520795516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:39,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:39,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:35:39,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754272868] [2024-06-20 16:35:39,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:39,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:35:39,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:39,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:35:39,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:35:39,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:39,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 178 transitions, 1512 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:39,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:39,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:39,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:40,242 INFO L124 PetriNetUnfolderBase]: 541/1034 cut-off events. [2024-06-20 16:35:40,242 INFO L125 PetriNetUnfolderBase]: For 107520/107524 co-relation queries the response was YES. [2024-06-20 16:35:40,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5975 conditions, 1034 events. 541/1034 cut-off events. For 107520/107524 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5512 event pairs, 119 based on Foata normal form. 3/1036 useless extension candidates. Maximal degree in co-relation 5854. Up to 668 conditions per place. [2024-06-20 16:35:40,249 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 123 selfloop transitions, 70 changer transitions 0/195 dead transitions. [2024-06-20 16:35:40,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 195 transitions, 1977 flow [2024-06-20 16:35:40,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:40,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:40,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-20 16:35:40,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38387096774193546 [2024-06-20 16:35:40,251 INFO L175 Difference]: Start difference. First operand has 252 places, 178 transitions, 1512 flow. Second operand 10 states and 119 transitions. [2024-06-20 16:35:40,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 195 transitions, 1977 flow [2024-06-20 16:35:40,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 195 transitions, 1815 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-20 16:35:40,498 INFO L231 Difference]: Finished difference. Result has 247 places, 179 transitions, 1527 flow [2024-06-20 16:35:40,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1352, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1527, PETRI_PLACES=247, PETRI_TRANSITIONS=179} [2024-06-20 16:35:40,499 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 217 predicate places. [2024-06-20 16:35:40,499 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 179 transitions, 1527 flow [2024-06-20 16:35:40,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:40,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:40,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:40,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 16:35:40,500 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:40,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:40,500 INFO L85 PathProgramCache]: Analyzing trace with hash 421923346, now seen corresponding path program 20 times [2024-06-20 16:35:40,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:40,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629436329] [2024-06-20 16:35:40,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:40,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:40,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:41,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:41,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629436329] [2024-06-20 16:35:41,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629436329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:41,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:41,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:35:41,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972123661] [2024-06-20 16:35:41,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:41,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:35:41,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:41,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:35:41,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:35:41,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:41,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 179 transitions, 1527 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:41,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:41,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:41,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:41,975 INFO L124 PetriNetUnfolderBase]: 581/1114 cut-off events. [2024-06-20 16:35:41,976 INFO L125 PetriNetUnfolderBase]: For 154395/154399 co-relation queries the response was YES. [2024-06-20 16:35:41,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7365 conditions, 1114 events. 581/1114 cut-off events. For 154395/154399 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 6008 event pairs, 133 based on Foata normal form. 3/1116 useless extension candidates. Maximal degree in co-relation 7246. Up to 660 conditions per place. [2024-06-20 16:35:41,985 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 128 selfloop transitions, 72 changer transitions 0/202 dead transitions. [2024-06-20 16:35:41,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 202 transitions, 2245 flow [2024-06-20 16:35:41,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:41,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:41,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-20 16:35:41,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 16:35:41,986 INFO L175 Difference]: Start difference. First operand has 247 places, 179 transitions, 1527 flow. Second operand 10 states and 124 transitions. [2024-06-20 16:35:41,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 202 transitions, 2245 flow [2024-06-20 16:35:42,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 202 transitions, 2081 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-20 16:35:42,297 INFO L231 Difference]: Finished difference. Result has 249 places, 181 transitions, 1575 flow [2024-06-20 16:35:42,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1363, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1575, PETRI_PLACES=249, PETRI_TRANSITIONS=181} [2024-06-20 16:35:42,298 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 219 predicate places. [2024-06-20 16:35:42,298 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 181 transitions, 1575 flow [2024-06-20 16:35:42,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:42,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:42,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:42,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 16:35:42,299 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:42,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:42,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1240514016, now seen corresponding path program 3 times [2024-06-20 16:35:42,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:42,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120130230] [2024-06-20 16:35:42,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:42,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:42,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:43,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:43,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:43,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120130230] [2024-06-20 16:35:43,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120130230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:43,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:43,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:35:43,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603181392] [2024-06-20 16:35:43,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:43,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:35:43,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:43,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:35:43,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:35:43,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:43,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 181 transitions, 1575 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:43,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:43,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:43,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:43,614 INFO L124 PetriNetUnfolderBase]: 603/1160 cut-off events. [2024-06-20 16:35:43,615 INFO L125 PetriNetUnfolderBase]: For 191779/191783 co-relation queries the response was YES. [2024-06-20 16:35:43,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7518 conditions, 1160 events. 603/1160 cut-off events. For 191779/191783 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 6343 event pairs, 137 based on Foata normal form. 11/1170 useless extension candidates. Maximal degree in co-relation 7398. Up to 744 conditions per place. [2024-06-20 16:35:43,625 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 121 selfloop transitions, 66 changer transitions 16/205 dead transitions. [2024-06-20 16:35:43,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 205 transitions, 2075 flow [2024-06-20 16:35:43,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:35:43,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:35:43,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2024-06-20 16:35:43,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-20 16:35:43,628 INFO L175 Difference]: Start difference. First operand has 249 places, 181 transitions, 1575 flow. Second operand 11 states and 132 transitions. [2024-06-20 16:35:43,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 205 transitions, 2075 flow [2024-06-20 16:35:43,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 205 transitions, 1955 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-20 16:35:43,983 INFO L231 Difference]: Finished difference. Result has 254 places, 177 transitions, 1559 flow [2024-06-20 16:35:43,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1457, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1559, PETRI_PLACES=254, PETRI_TRANSITIONS=177} [2024-06-20 16:35:43,983 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 224 predicate places. [2024-06-20 16:35:43,983 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 177 transitions, 1559 flow [2024-06-20 16:35:43,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:43,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:43,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:43,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 16:35:43,984 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:43,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:43,985 INFO L85 PathProgramCache]: Analyzing trace with hash 429280576, now seen corresponding path program 21 times [2024-06-20 16:35:43,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:43,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448207085] [2024-06-20 16:35:43,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:43,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:43,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:44,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:44,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:44,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448207085] [2024-06-20 16:35:44,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448207085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:44,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:44,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:35:44,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243181316] [2024-06-20 16:35:44,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:44,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:35:44,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:44,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:35:44,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:35:44,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:44,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 177 transitions, 1559 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) [2024-06-20 16:35:44,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:44,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:44,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:45,150 INFO L124 PetriNetUnfolderBase]: 551/1064 cut-off events. [2024-06-20 16:35:45,151 INFO L125 PetriNetUnfolderBase]: For 151428/151432 co-relation queries the response was YES. [2024-06-20 16:35:45,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6134 conditions, 1064 events. 551/1064 cut-off events. For 151428/151432 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 5743 event pairs, 125 based on Foata normal form. 13/1076 useless extension candidates. Maximal degree in co-relation 6012. Up to 668 conditions per place. [2024-06-20 16:35:45,160 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 124 selfloop transitions, 64 changer transitions 7/197 dead transitions. [2024-06-20 16:35:45,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 197 transitions, 2021 flow [2024-06-20 16:35:45,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:45,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:45,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-06-20 16:35:45,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3935483870967742 [2024-06-20 16:35:45,161 INFO L175 Difference]: Start difference. First operand has 254 places, 177 transitions, 1559 flow. Second operand 10 states and 122 transitions. [2024-06-20 16:35:45,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 197 transitions, 2021 flow [2024-06-20 16:35:45,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 197 transitions, 1855 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-20 16:35:45,402 INFO L231 Difference]: Finished difference. Result has 249 places, 174 transitions, 1501 flow [2024-06-20 16:35:45,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1393, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1501, PETRI_PLACES=249, PETRI_TRANSITIONS=174} [2024-06-20 16:35:45,402 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 219 predicate places. [2024-06-20 16:35:45,402 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 174 transitions, 1501 flow [2024-06-20 16:35:45,403 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) [2024-06-20 16:35:45,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:45,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:45,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 16:35:45,403 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:45,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:45,403 INFO L85 PathProgramCache]: Analyzing trace with hash 2113134814, now seen corresponding path program 22 times [2024-06-20 16:35:45,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:45,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837472093] [2024-06-20 16:35:45,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:45,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:45,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:46,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:46,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:46,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837472093] [2024-06-20 16:35:46,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837472093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:46,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:46,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:35:46,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471706102] [2024-06-20 16:35:46,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:46,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:35:46,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:46,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:35:46,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:35:46,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:46,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 174 transitions, 1501 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:46,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:46,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:46,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:46,823 INFO L124 PetriNetUnfolderBase]: 547/1060 cut-off events. [2024-06-20 16:35:46,823 INFO L125 PetriNetUnfolderBase]: For 145084/145088 co-relation queries the response was YES. [2024-06-20 16:35:46,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6044 conditions, 1060 events. 547/1060 cut-off events. For 145084/145088 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5729 event pairs, 107 based on Foata normal form. 13/1072 useless extension candidates. Maximal degree in co-relation 5924. Up to 670 conditions per place. [2024-06-20 16:35:46,831 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 117 selfloop transitions, 71 changer transitions 7/197 dead transitions. [2024-06-20 16:35:46,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 197 transitions, 2000 flow [2024-06-20 16:35:46,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:35:46,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:35:46,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-20 16:35:46,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39296187683284456 [2024-06-20 16:35:46,832 INFO L175 Difference]: Start difference. First operand has 249 places, 174 transitions, 1501 flow. Second operand 11 states and 134 transitions. [2024-06-20 16:35:46,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 197 transitions, 2000 flow [2024-06-20 16:35:47,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 197 transitions, 1864 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-20 16:35:47,052 INFO L231 Difference]: Finished difference. Result has 250 places, 172 transitions, 1520 flow [2024-06-20 16:35:47,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1365, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1520, PETRI_PLACES=250, PETRI_TRANSITIONS=172} [2024-06-20 16:35:47,052 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 220 predicate places. [2024-06-20 16:35:47,052 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 172 transitions, 1520 flow [2024-06-20 16:35:47,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:47,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:47,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:47,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 16:35:47,053 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:47,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:47,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1233364176, now seen corresponding path program 4 times [2024-06-20 16:35:47,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:47,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585011824] [2024-06-20 16:35:47,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:47,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:47,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:48,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:48,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:48,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585011824] [2024-06-20 16:35:48,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585011824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:48,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:48,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:35:48,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015988454] [2024-06-20 16:35:48,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:48,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:35:48,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:48,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:35:48,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:35:48,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:48,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 172 transitions, 1520 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:48,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:48,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:48,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:48,572 INFO L124 PetriNetUnfolderBase]: 539/1048 cut-off events. [2024-06-20 16:35:48,572 INFO L125 PetriNetUnfolderBase]: For 139617/139621 co-relation queries the response was YES. [2024-06-20 16:35:48,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6035 conditions, 1048 events. 539/1048 cut-off events. For 139617/139621 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 5675 event pairs, 123 based on Foata normal form. 11/1058 useless extension candidates. Maximal degree in co-relation 5914. Up to 664 conditions per place. [2024-06-20 16:35:48,581 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 123 selfloop transitions, 59 changer transitions 9/193 dead transitions. [2024-06-20 16:35:48,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 193 transitions, 1976 flow [2024-06-20 16:35:48,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:35:48,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:35:48,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 128 transitions. [2024-06-20 16:35:48,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375366568914956 [2024-06-20 16:35:48,582 INFO L175 Difference]: Start difference. First operand has 250 places, 172 transitions, 1520 flow. Second operand 11 states and 128 transitions. [2024-06-20 16:35:48,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 193 transitions, 1976 flow [2024-06-20 16:35:48,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 193 transitions, 1801 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-20 16:35:48,795 INFO L231 Difference]: Finished difference. Result has 251 places, 169 transitions, 1446 flow [2024-06-20 16:35:48,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1345, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1446, PETRI_PLACES=251, PETRI_TRANSITIONS=169} [2024-06-20 16:35:48,796 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 221 predicate places. [2024-06-20 16:35:48,796 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 169 transitions, 1446 flow [2024-06-20 16:35:48,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:48,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:48,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:48,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 16:35:48,796 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:48,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:48,797 INFO L85 PathProgramCache]: Analyzing trace with hash 2105783164, now seen corresponding path program 23 times [2024-06-20 16:35:48,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:48,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518931536] [2024-06-20 16:35:48,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:48,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:48,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:49,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:49,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:49,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518931536] [2024-06-20 16:35:49,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518931536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:49,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:49,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 16:35:49,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10591126] [2024-06-20 16:35:49,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:49,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 16:35:49,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:49,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 16:35:49,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-20 16:35:49,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:49,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 169 transitions, 1446 flow. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:49,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:49,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:49,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:50,321 INFO L124 PetriNetUnfolderBase]: 517/1006 cut-off events. [2024-06-20 16:35:50,321 INFO L125 PetriNetUnfolderBase]: For 107490/107494 co-relation queries the response was YES. [2024-06-20 16:35:50,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5870 conditions, 1006 events. 517/1006 cut-off events. For 107490/107494 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5395 event pairs, 107 based on Foata normal form. 3/1008 useless extension candidates. Maximal degree in co-relation 5748. Up to 672 conditions per place. [2024-06-20 16:35:50,329 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 113 selfloop transitions, 73 changer transitions 0/188 dead transitions. [2024-06-20 16:35:50,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 188 transitions, 1905 flow [2024-06-20 16:35:50,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:35:50,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:35:50,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-20 16:35:50,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3782991202346041 [2024-06-20 16:35:50,330 INFO L175 Difference]: Start difference. First operand has 251 places, 169 transitions, 1446 flow. Second operand 11 states and 129 transitions. [2024-06-20 16:35:50,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 188 transitions, 1905 flow [2024-06-20 16:35:50,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 188 transitions, 1779 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-06-20 16:35:50,559 INFO L231 Difference]: Finished difference. Result has 249 places, 170 transitions, 1505 flow [2024-06-20 16:35:50,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1320, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1505, PETRI_PLACES=249, PETRI_TRANSITIONS=170} [2024-06-20 16:35:50,560 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 219 predicate places. [2024-06-20 16:35:50,560 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 170 transitions, 1505 flow [2024-06-20 16:35:50,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:50,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:50,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:50,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 16:35:50,560 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:50,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:50,560 INFO L85 PathProgramCache]: Analyzing trace with hash 429557282, now seen corresponding path program 5 times [2024-06-20 16:35:50,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:50,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33600986] [2024-06-20 16:35:50,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:50,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:50,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:51,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:51,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:51,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33600986] [2024-06-20 16:35:51,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33600986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:51,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:51,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:35:51,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146211893] [2024-06-20 16:35:51,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:51,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:35:51,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:51,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:35:51,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:35:51,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:51,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 170 transitions, 1505 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) [2024-06-20 16:35:51,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:51,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:51,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:51,642 INFO L124 PetriNetUnfolderBase]: 544/1067 cut-off events. [2024-06-20 16:35:51,642 INFO L125 PetriNetUnfolderBase]: For 160126/160130 co-relation queries the response was YES. [2024-06-20 16:35:51,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6639 conditions, 1067 events. 544/1067 cut-off events. For 160126/160130 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 5805 event pairs, 136 based on Foata normal form. 9/1075 useless extension candidates. Maximal degree in co-relation 6518. Up to 658 conditions per place. [2024-06-20 16:35:51,652 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 126 selfloop transitions, 56 changer transitions 8/192 dead transitions. [2024-06-20 16:35:51,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 192 transitions, 2147 flow [2024-06-20 16:35:51,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:35:51,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:35:51,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-06-20 16:35:51,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3935483870967742 [2024-06-20 16:35:51,652 INFO L175 Difference]: Start difference. First operand has 249 places, 170 transitions, 1505 flow. Second operand 10 states and 122 transitions. [2024-06-20 16:35:51,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 192 transitions, 2147 flow [2024-06-20 16:35:51,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 192 transitions, 1973 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-20 16:35:51,944 INFO L231 Difference]: Finished difference. Result has 250 places, 167 transitions, 1426 flow [2024-06-20 16:35:51,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1331, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1426, PETRI_PLACES=250, PETRI_TRANSITIONS=167} [2024-06-20 16:35:51,944 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 220 predicate places. [2024-06-20 16:35:51,944 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 167 transitions, 1426 flow [2024-06-20 16:35:51,945 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) [2024-06-20 16:35:51,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:51,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:51,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 16:35:51,945 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:51,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:51,945 INFO L85 PathProgramCache]: Analyzing trace with hash 2105777584, now seen corresponding path program 24 times [2024-06-20 16:35:51,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:51,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215967981] [2024-06-20 16:35:51,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:51,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:51,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:52,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:52,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:52,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215967981] [2024-06-20 16:35:52,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215967981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:52,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:52,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 16:35:52,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271025930] [2024-06-20 16:35:52,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:52,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 16:35:52,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:52,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 16:35:52,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-20 16:35:53,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:53,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 167 transitions, 1426 flow. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:53,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:53,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:53,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:53,371 INFO L124 PetriNetUnfolderBase]: 529/1034 cut-off events. [2024-06-20 16:35:53,371 INFO L125 PetriNetUnfolderBase]: For 136866/136870 co-relation queries the response was YES. [2024-06-20 16:35:53,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6512 conditions, 1034 events. 529/1034 cut-off events. For 136866/136870 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 5555 event pairs, 120 based on Foata normal form. 3/1036 useless extension candidates. Maximal degree in co-relation 6390. Up to 609 conditions per place. [2024-06-20 16:35:53,379 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 114 selfloop transitions, 75 changer transitions 0/191 dead transitions. [2024-06-20 16:35:53,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 191 transitions, 2107 flow [2024-06-20 16:35:53,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:35:53,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:35:53,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2024-06-20 16:35:53,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-20 16:35:53,380 INFO L175 Difference]: Start difference. First operand has 250 places, 167 transitions, 1426 flow. Second operand 11 states and 132 transitions. [2024-06-20 16:35:53,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 191 transitions, 2107 flow [2024-06-20 16:35:53,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 191 transitions, 1984 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-20 16:35:53,646 INFO L231 Difference]: Finished difference. Result has 248 places, 168 transitions, 1498 flow [2024-06-20 16:35:53,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1309, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1498, PETRI_PLACES=248, PETRI_TRANSITIONS=168} [2024-06-20 16:35:53,646 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 218 predicate places. [2024-06-20 16:35:53,646 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 168 transitions, 1498 flow [2024-06-20 16:35:53,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:53,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:53,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:53,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 16:35:53,647 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:53,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:53,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1608653278, now seen corresponding path program 6 times [2024-06-20 16:35:53,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:53,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222735647] [2024-06-20 16:35:53,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:53,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:53,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:54,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:54,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:54,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222735647] [2024-06-20 16:35:54,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222735647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:54,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:54,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:35:54,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250106158] [2024-06-20 16:35:54,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:54,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:35:54,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:54,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:35:54,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:35:54,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:54,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 168 transitions, 1498 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:54,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:54,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:54,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:54,853 INFO L124 PetriNetUnfolderBase]: 570/1121 cut-off events. [2024-06-20 16:35:54,854 INFO L125 PetriNetUnfolderBase]: For 200326/200330 co-relation queries the response was YES. [2024-06-20 16:35:54,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7702 conditions, 1121 events. 570/1121 cut-off events. For 200326/200330 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 6156 event pairs, 137 based on Foata normal form. 9/1129 useless extension candidates. Maximal degree in co-relation 7582. Up to 537 conditions per place. [2024-06-20 16:35:54,863 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 116 selfloop transitions, 68 changer transitions 10/196 dead transitions. [2024-06-20 16:35:54,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 196 transitions, 2172 flow [2024-06-20 16:35:54,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:35:54,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:35:54,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 142 transitions. [2024-06-20 16:35:54,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3817204301075269 [2024-06-20 16:35:54,864 INFO L175 Difference]: Start difference. First operand has 248 places, 168 transitions, 1498 flow. Second operand 12 states and 142 transitions. [2024-06-20 16:35:54,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 196 transitions, 2172 flow [2024-06-20 16:35:55,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 196 transitions, 1943 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-20 16:35:55,209 INFO L231 Difference]: Finished difference. Result has 250 places, 165 transitions, 1389 flow [2024-06-20 16:35:55,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1269, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1389, PETRI_PLACES=250, PETRI_TRANSITIONS=165} [2024-06-20 16:35:55,210 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 220 predicate places. [2024-06-20 16:35:55,210 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 165 transitions, 1389 flow [2024-06-20 16:35:55,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:55,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:55,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:55,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 16:35:55,210 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:55,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:55,210 INFO L85 PathProgramCache]: Analyzing trace with hash 2105992910, now seen corresponding path program 7 times [2024-06-20 16:35:55,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:55,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328075518] [2024-06-20 16:35:55,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:55,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:55,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:56,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:56,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:56,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328075518] [2024-06-20 16:35:56,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328075518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:56,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:56,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 16:35:56,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049308721] [2024-06-20 16:35:56,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:56,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 16:35:56,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:56,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 16:35:56,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-06-20 16:35:56,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:56,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 165 transitions, 1389 flow. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:56,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:56,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:56,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:56,735 INFO L124 PetriNetUnfolderBase]: 568/1115 cut-off events. [2024-06-20 16:35:56,735 INFO L125 PetriNetUnfolderBase]: For 212690/212694 co-relation queries the response was YES. [2024-06-20 16:35:56,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7540 conditions, 1115 events. 568/1115 cut-off events. For 212690/212694 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6099 event pairs, 145 based on Foata normal form. 11/1125 useless extension candidates. Maximal degree in co-relation 7420. Up to 780 conditions per place. [2024-06-20 16:35:56,744 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 115 selfloop transitions, 62 changer transitions 11/190 dead transitions. [2024-06-20 16:35:56,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 190 transitions, 1861 flow [2024-06-20 16:35:56,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:35:56,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:35:56,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 134 transitions. [2024-06-20 16:35:56,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3602150537634409 [2024-06-20 16:35:56,745 INFO L175 Difference]: Start difference. First operand has 250 places, 165 transitions, 1389 flow. Second operand 12 states and 134 transitions. [2024-06-20 16:35:56,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 190 transitions, 1861 flow [2024-06-20 16:35:57,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 190 transitions, 1727 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-20 16:35:57,181 INFO L231 Difference]: Finished difference. Result has 248 places, 164 transitions, 1382 flow [2024-06-20 16:35:57,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1259, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1382, PETRI_PLACES=248, PETRI_TRANSITIONS=164} [2024-06-20 16:35:57,181 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 218 predicate places. [2024-06-20 16:35:57,181 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 164 transitions, 1382 flow [2024-06-20 16:35:57,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:57,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:57,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:57,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 16:35:57,182 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:57,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:57,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1619704468, now seen corresponding path program 8 times [2024-06-20 16:35:57,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:57,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977064725] [2024-06-20 16:35:57,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:57,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:57,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:58,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:58,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:58,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977064725] [2024-06-20 16:35:58,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977064725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:58,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:58,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:35:58,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129507829] [2024-06-20 16:35:58,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:58,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:35:58,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:58,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:35:58,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:35:58,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:58,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 164 transitions, 1382 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:58,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:58,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:58,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:35:58,517 INFO L124 PetriNetUnfolderBase]: 526/1037 cut-off events. [2024-06-20 16:35:58,518 INFO L125 PetriNetUnfolderBase]: For 161856/161860 co-relation queries the response was YES. [2024-06-20 16:35:58,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6103 conditions, 1037 events. 526/1037 cut-off events. For 161856/161860 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5611 event pairs, 125 based on Foata normal form. 13/1049 useless extension candidates. Maximal degree in co-relation 5984. Up to 668 conditions per place. [2024-06-20 16:35:58,525 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 108 selfloop transitions, 69 changer transitions 7/186 dead transitions. [2024-06-20 16:35:58,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 186 transitions, 1828 flow [2024-06-20 16:35:58,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:35:58,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:35:58,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-20 16:35:58,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812316715542522 [2024-06-20 16:35:58,526 INFO L175 Difference]: Start difference. First operand has 248 places, 164 transitions, 1382 flow. Second operand 11 states and 130 transitions. [2024-06-20 16:35:58,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 186 transitions, 1828 flow [2024-06-20 16:35:58,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 186 transitions, 1683 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-20 16:35:58,831 INFO L231 Difference]: Finished difference. Result has 247 places, 161 transitions, 1357 flow [2024-06-20 16:35:58,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1237, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1357, PETRI_PLACES=247, PETRI_TRANSITIONS=161} [2024-06-20 16:35:58,832 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 217 predicate places. [2024-06-20 16:35:58,832 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 161 transitions, 1357 flow [2024-06-20 16:35:58,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:58,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:35:58,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:35:58,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 16:35:58,832 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:35:58,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:35:58,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1924457098, now seen corresponding path program 9 times [2024-06-20 16:35:58,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:35:58,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614542522] [2024-06-20 16:35:58,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:35:58,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:35:58,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:35:59,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:35:59,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:35:59,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614542522] [2024-06-20 16:35:59,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614542522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:35:59,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:35:59,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:35:59,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180985594] [2024-06-20 16:35:59,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:35:59,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:35:59,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:35:59,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:35:59,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:35:59,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:35:59,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 161 transitions, 1357 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:35:59,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:35:59,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:35:59,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:00,095 INFO L124 PetriNetUnfolderBase]: 529/1050 cut-off events. [2024-06-20 16:36:00,095 INFO L125 PetriNetUnfolderBase]: For 169332/169336 co-relation queries the response was YES. [2024-06-20 16:36:00,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6632 conditions, 1050 events. 529/1050 cut-off events. For 169332/169336 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5688 event pairs, 130 based on Foata normal form. 9/1058 useless extension candidates. Maximal degree in co-relation 6514. Up to 622 conditions per place. [2024-06-20 16:36:00,104 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 111 selfloop transitions, 64 changer transitions 10/187 dead transitions. [2024-06-20 16:36:00,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 187 transitions, 2007 flow [2024-06-20 16:36:00,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:36:00,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:36:00,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2024-06-20 16:36:00,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-20 16:36:00,105 INFO L175 Difference]: Start difference. First operand has 247 places, 161 transitions, 1357 flow. Second operand 11 states and 132 transitions. [2024-06-20 16:36:00,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 187 transitions, 2007 flow [2024-06-20 16:36:00,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 187 transitions, 1793 flow, removed 3 selfloop flow, removed 13 redundant places. [2024-06-20 16:36:00,418 INFO L231 Difference]: Finished difference. Result has 245 places, 156 transitions, 1243 flow [2024-06-20 16:36:00,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1143, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1243, PETRI_PLACES=245, PETRI_TRANSITIONS=156} [2024-06-20 16:36:00,419 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 215 predicate places. [2024-06-20 16:36:00,419 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 156 transitions, 1243 flow [2024-06-20 16:36:00,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:00,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:00,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:00,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 16:36:00,419 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:00,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:00,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1933663168, now seen corresponding path program 10 times [2024-06-20 16:36:00,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:00,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598721] [2024-06-20 16:36:00,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:00,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:00,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:01,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:36:01,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:01,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598721] [2024-06-20 16:36:01,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:01,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:01,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:36:01,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567590198] [2024-06-20 16:36:01,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:01,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:36:01,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:01,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:36:01,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:36:01,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:01,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 156 transitions, 1243 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:01,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:01,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:01,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:01,778 INFO L124 PetriNetUnfolderBase]: 508/1011 cut-off events. [2024-06-20 16:36:01,778 INFO L125 PetriNetUnfolderBase]: For 164452/164456 co-relation queries the response was YES. [2024-06-20 16:36:01,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6029 conditions, 1011 events. 508/1011 cut-off events. For 164452/164456 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5426 event pairs, 130 based on Foata normal form. 11/1021 useless extension candidates. Maximal degree in co-relation 5910. Up to 676 conditions per place. [2024-06-20 16:36:01,786 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 104 selfloop transitions, 61 changer transitions 11/178 dead transitions. [2024-06-20 16:36:01,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 178 transitions, 1673 flow [2024-06-20 16:36:01,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:36:01,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:36:01,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 125 transitions. [2024-06-20 16:36:01,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36656891495601174 [2024-06-20 16:36:01,787 INFO L175 Difference]: Start difference. First operand has 245 places, 156 transitions, 1243 flow. Second operand 11 states and 125 transitions. [2024-06-20 16:36:01,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 178 transitions, 1673 flow [2024-06-20 16:36:02,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 178 transitions, 1506 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-20 16:36:02,111 INFO L231 Difference]: Finished difference. Result has 240 places, 153 transitions, 1183 flow [2024-06-20 16:36:02,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1078, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1183, PETRI_PLACES=240, PETRI_TRANSITIONS=153} [2024-06-20 16:36:02,112 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 210 predicate places. [2024-06-20 16:36:02,112 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 153 transitions, 1183 flow [2024-06-20 16:36:02,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:02,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:02,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:02,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 16:36:02,112 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:02,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:02,113 INFO L85 PathProgramCache]: Analyzing trace with hash 2113411520, now seen corresponding path program 11 times [2024-06-20 16:36:02,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:02,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107808700] [2024-06-20 16:36:02,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:02,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:02,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:02,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:36:02,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:02,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107808700] [2024-06-20 16:36:02,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107808700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:02,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:02,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:36:02,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74063716] [2024-06-20 16:36:02,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:02,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:36:02,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:02,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:36:02,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:36:02,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:02,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 153 transitions, 1183 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:02,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:02,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:02,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:03,309 INFO L124 PetriNetUnfolderBase]: 509/1022 cut-off events. [2024-06-20 16:36:03,309 INFO L125 PetriNetUnfolderBase]: For 173731/173735 co-relation queries the response was YES. [2024-06-20 16:36:03,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6426 conditions, 1022 events. 509/1022 cut-off events. For 173731/173735 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5516 event pairs, 137 based on Foata normal form. 9/1030 useless extension candidates. Maximal degree in co-relation 6310. Up to 603 conditions per place. [2024-06-20 16:36:03,317 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 110 selfloop transitions, 57 changer transitions 8/177 dead transitions. [2024-06-20 16:36:03,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 177 transitions, 1793 flow [2024-06-20 16:36:03,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:36:03,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:36:03,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-20 16:36:03,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36950146627565983 [2024-06-20 16:36:03,318 INFO L175 Difference]: Start difference. First operand has 240 places, 153 transitions, 1183 flow. Second operand 11 states and 126 transitions. [2024-06-20 16:36:03,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 177 transitions, 1793 flow [2024-06-20 16:36:03,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 177 transitions, 1663 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-20 16:36:03,624 INFO L231 Difference]: Finished difference. Result has 238 places, 150 transitions, 1153 flow [2024-06-20 16:36:03,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1153, PETRI_PLACES=238, PETRI_TRANSITIONS=150} [2024-06-20 16:36:03,624 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 208 predicate places. [2024-06-20 16:36:03,624 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 150 transitions, 1153 flow [2024-06-20 16:36:03,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:03,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:03,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:03,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 16:36:03,624 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:03,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:03,625 INFO L85 PathProgramCache]: Analyzing trace with hash 2113142750, now seen corresponding path program 12 times [2024-06-20 16:36:03,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:03,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217897361] [2024-06-20 16:36:03,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:03,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:03,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:04,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:36:04,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:04,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217897361] [2024-06-20 16:36:04,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217897361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:04,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:04,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:36:04,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290171169] [2024-06-20 16:36:04,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:04,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:36:04,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:04,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:36:04,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:36:04,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:04,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 150 transitions, 1153 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:04,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:04,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:04,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:04,949 INFO L124 PetriNetUnfolderBase]: 492/991 cut-off events. [2024-06-20 16:36:04,949 INFO L125 PetriNetUnfolderBase]: For 162090/162094 co-relation queries the response was YES. [2024-06-20 16:36:04,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5913 conditions, 991 events. 492/991 cut-off events. For 162090/162094 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5310 event pairs, 139 based on Foata normal form. 11/1001 useless extension candidates. Maximal degree in co-relation 5798. Up to 656 conditions per place. [2024-06-20 16:36:04,957 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 102 selfloop transitions, 55 changer transitions 11/170 dead transitions. [2024-06-20 16:36:04,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 170 transitions, 1551 flow [2024-06-20 16:36:04,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:36:04,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:36:04,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 121 transitions. [2024-06-20 16:36:04,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-20 16:36:04,958 INFO L175 Difference]: Start difference. First operand has 238 places, 150 transitions, 1153 flow. Second operand 11 states and 121 transitions. [2024-06-20 16:36:04,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 170 transitions, 1551 flow [2024-06-20 16:36:05,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 170 transitions, 1435 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-20 16:36:05,214 INFO L231 Difference]: Finished difference. Result has 235 places, 146 transitions, 1122 flow [2024-06-20 16:36:05,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1122, PETRI_PLACES=235, PETRI_TRANSITIONS=146} [2024-06-20 16:36:05,214 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 205 predicate places. [2024-06-20 16:36:05,214 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 146 transitions, 1122 flow [2024-06-20 16:36:05,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:05,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:05,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:05,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 16:36:05,215 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:05,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:05,215 INFO L85 PathProgramCache]: Analyzing trace with hash -548209909, now seen corresponding path program 1 times [2024-06-20 16:36:05,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:05,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746318929] [2024-06-20 16:36:05,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:05,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:05,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:06,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:36:06,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:06,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746318929] [2024-06-20 16:36:06,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746318929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:06,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:06,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 16:36:06,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554295463] [2024-06-20 16:36:06,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:06,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 16:36:06,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:06,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 16:36:06,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-20 16:36:06,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:06,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 146 transitions, 1122 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:06,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:06,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:06,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:06,589 INFO L124 PetriNetUnfolderBase]: 474/961 cut-off events. [2024-06-20 16:36:06,589 INFO L125 PetriNetUnfolderBase]: For 142916/142920 co-relation queries the response was YES. [2024-06-20 16:36:06,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5773 conditions, 961 events. 474/961 cut-off events. For 142916/142920 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5130 event pairs, 135 based on Foata normal form. 10/970 useless extension candidates. Maximal degree in co-relation 5660. Up to 806 conditions per place. [2024-06-20 16:36:06,601 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 127 selfloop transitions, 11 changer transitions 27/167 dead transitions. [2024-06-20 16:36:06,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 167 transitions, 1506 flow [2024-06-20 16:36:06,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:36:06,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:36:06,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 108 transitions. [2024-06-20 16:36:06,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31671554252199413 [2024-06-20 16:36:06,602 INFO L175 Difference]: Start difference. First operand has 235 places, 146 transitions, 1122 flow. Second operand 11 states and 108 transitions. [2024-06-20 16:36:06,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 167 transitions, 1506 flow [2024-06-20 16:36:06,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 167 transitions, 1355 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-20 16:36:06,862 INFO L231 Difference]: Finished difference. Result has 232 places, 136 transitions, 923 flow [2024-06-20 16:36:06,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=973, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=923, PETRI_PLACES=232, PETRI_TRANSITIONS=136} [2024-06-20 16:36:06,863 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 202 predicate places. [2024-06-20 16:36:06,863 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 136 transitions, 923 flow [2024-06-20 16:36:06,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:06,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:06,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:06,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 16:36:06,863 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:06,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:06,863 INFO L85 PathProgramCache]: Analyzing trace with hash -426258997, now seen corresponding path program 2 times [2024-06-20 16:36:06,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:06,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541635914] [2024-06-20 16:36:06,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:06,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:06,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:07,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:36:07,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:07,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541635914] [2024-06-20 16:36:07,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541635914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:07,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:07,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:36:07,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552121583] [2024-06-20 16:36:07,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:07,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:36:07,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:07,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:36:07,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:36:07,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:07,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 136 transitions, 923 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:07,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:07,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:07,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:08,128 INFO L124 PetriNetUnfolderBase]: 430/877 cut-off events. [2024-06-20 16:36:08,129 INFO L125 PetriNetUnfolderBase]: For 133232/133236 co-relation queries the response was YES. [2024-06-20 16:36:08,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5195 conditions, 877 events. 430/877 cut-off events. For 133232/133236 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4577 event pairs, 84 based on Foata normal form. 7/883 useless extension candidates. Maximal degree in co-relation 5095. Up to 266 conditions per place. [2024-06-20 16:36:08,134 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 74 selfloop transitions, 52 changer transitions 22/150 dead transitions. [2024-06-20 16:36:08,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 150 transitions, 1249 flow [2024-06-20 16:36:08,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:36:08,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:36:08,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 94 transitions. [2024-06-20 16:36:08,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3032258064516129 [2024-06-20 16:36:08,135 INFO L175 Difference]: Start difference. First operand has 232 places, 136 transitions, 923 flow. Second operand 10 states and 94 transitions. [2024-06-20 16:36:08,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 150 transitions, 1249 flow [2024-06-20 16:36:08,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 150 transitions, 1215 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-20 16:36:08,312 INFO L231 Difference]: Finished difference. Result has 218 places, 124 transitions, 931 flow [2024-06-20 16:36:08,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=931, PETRI_PLACES=218, PETRI_TRANSITIONS=124} [2024-06-20 16:36:08,312 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 188 predicate places. [2024-06-20 16:36:08,313 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 124 transitions, 931 flow [2024-06-20 16:36:08,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:08,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:08,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:08,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 16:36:08,313 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:08,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:08,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1753076219, now seen corresponding path program 3 times [2024-06-20 16:36:08,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:08,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792880137] [2024-06-20 16:36:08,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:08,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:08,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:09,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:36:09,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:09,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792880137] [2024-06-20 16:36:09,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792880137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:09,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:09,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 16:36:09,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736039774] [2024-06-20 16:36:09,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:09,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 16:36:09,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:09,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 16:36:09,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-20 16:36:09,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:09,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 124 transitions, 931 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:09,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:09,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:09,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:09,629 INFO L124 PetriNetUnfolderBase]: 388/803 cut-off events. [2024-06-20 16:36:09,629 INFO L125 PetriNetUnfolderBase]: For 118412/118416 co-relation queries the response was YES. [2024-06-20 16:36:09,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4948 conditions, 803 events. 388/803 cut-off events. For 118412/118416 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4136 event pairs, 109 based on Foata normal form. 10/812 useless extension candidates. Maximal degree in co-relation 4853. Up to 634 conditions per place. [2024-06-20 16:36:09,635 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 108 selfloop transitions, 19 changer transitions 13/142 dead transitions. [2024-06-20 16:36:09,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 142 transitions, 1255 flow [2024-06-20 16:36:09,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:36:09,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:36:09,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 108 transitions. [2024-06-20 16:36:09,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31671554252199413 [2024-06-20 16:36:09,636 INFO L175 Difference]: Start difference. First operand has 218 places, 124 transitions, 931 flow. Second operand 11 states and 108 transitions. [2024-06-20 16:36:09,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 142 transitions, 1255 flow [2024-06-20 16:36:09,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 142 transitions, 1133 flow, removed 9 selfloop flow, removed 14 redundant places. [2024-06-20 16:36:09,799 INFO L231 Difference]: Finished difference. Result has 203 places, 119 transitions, 821 flow [2024-06-20 16:36:09,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=821, PETRI_PLACES=203, PETRI_TRANSITIONS=119} [2024-06-20 16:36:09,799 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 173 predicate places. [2024-06-20 16:36:09,799 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 119 transitions, 821 flow [2024-06-20 16:36:09,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:09,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:09,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:09,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 16:36:09,799 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:09,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:09,800 INFO L85 PathProgramCache]: Analyzing trace with hash -310794847, now seen corresponding path program 4 times [2024-06-20 16:36:09,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:09,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035993908] [2024-06-20 16:36:09,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:09,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:09,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:10,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:36:10,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:10,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035993908] [2024-06-20 16:36:10,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035993908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:10,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:10,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 16:36:10,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048637295] [2024-06-20 16:36:10,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:10,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 16:36:10,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:10,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 16:36:10,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-06-20 16:36:10,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:10,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 119 transitions, 821 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:10,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:10,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:10,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:11,197 INFO L124 PetriNetUnfolderBase]: 372/775 cut-off events. [2024-06-20 16:36:11,197 INFO L125 PetriNetUnfolderBase]: For 96054/96058 co-relation queries the response was YES. [2024-06-20 16:36:11,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4522 conditions, 775 events. 372/775 cut-off events. For 96054/96058 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3951 event pairs, 113 based on Foata normal form. 10/784 useless extension candidates. Maximal degree in co-relation 4435. Up to 646 conditions per place. [2024-06-20 16:36:11,201 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 105 selfloop transitions, 17 changer transitions 13/137 dead transitions. [2024-06-20 16:36:11,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 137 transitions, 1139 flow [2024-06-20 16:36:11,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:36:11,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:36:11,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 105 transitions. [2024-06-20 16:36:11,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30791788856304986 [2024-06-20 16:36:11,202 INFO L175 Difference]: Start difference. First operand has 203 places, 119 transitions, 821 flow. Second operand 11 states and 105 transitions. [2024-06-20 16:36:11,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 137 transitions, 1139 flow [2024-06-20 16:36:11,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 137 transitions, 1093 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-20 16:36:11,345 INFO L231 Difference]: Finished difference. Result has 197 places, 114 transitions, 776 flow [2024-06-20 16:36:11,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=776, PETRI_PLACES=197, PETRI_TRANSITIONS=114} [2024-06-20 16:36:11,345 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 167 predicate places. [2024-06-20 16:36:11,345 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 114 transitions, 776 flow [2024-06-20 16:36:11,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:11,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:11,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:11,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 16:36:11,345 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:11,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:11,346 INFO L85 PathProgramCache]: Analyzing trace with hash -310967827, now seen corresponding path program 5 times [2024-06-20 16:36:11,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:11,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601772592] [2024-06-20 16:36:11,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:11,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:11,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:12,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:36:12,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:12,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601772592] [2024-06-20 16:36:12,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601772592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:12,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:12,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 16:36:12,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989168366] [2024-06-20 16:36:12,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:12,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 16:36:12,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:12,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 16:36:12,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-20 16:36:12,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:12,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 114 transitions, 776 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:12,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:12,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:12,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:12,709 INFO L124 PetriNetUnfolderBase]: 359/752 cut-off events. [2024-06-20 16:36:12,709 INFO L125 PetriNetUnfolderBase]: For 88312/88316 co-relation queries the response was YES. [2024-06-20 16:36:12,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4339 conditions, 752 events. 359/752 cut-off events. For 88312/88316 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3803 event pairs, 111 based on Foata normal form. 10/761 useless extension candidates. Maximal degree in co-relation 4255. Up to 626 conditions per place. [2024-06-20 16:36:12,714 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 92 selfloop transitions, 5 changer transitions 33/132 dead transitions. [2024-06-20 16:36:12,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 132 transitions, 1082 flow [2024-06-20 16:36:12,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:36:12,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:36:12,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 104 transitions. [2024-06-20 16:36:12,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30498533724340177 [2024-06-20 16:36:12,715 INFO L175 Difference]: Start difference. First operand has 197 places, 114 transitions, 776 flow. Second operand 11 states and 104 transitions. [2024-06-20 16:36:12,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 132 transitions, 1082 flow [2024-06-20 16:36:12,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 132 transitions, 1042 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-20 16:36:12,856 INFO L231 Difference]: Finished difference. Result has 192 places, 98 transitions, 624 flow [2024-06-20 16:36:12,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=624, PETRI_PLACES=192, PETRI_TRANSITIONS=98} [2024-06-20 16:36:12,857 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 162 predicate places. [2024-06-20 16:36:12,857 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 98 transitions, 624 flow [2024-06-20 16:36:12,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:12,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:12,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:12,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 16:36:12,857 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:12,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:12,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1279513727, now seen corresponding path program 6 times [2024-06-20 16:36:12,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:12,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152854587] [2024-06-20 16:36:12,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:12,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:12,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:14,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:36:14,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:14,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152854587] [2024-06-20 16:36:14,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152854587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:14,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:14,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 16:36:14,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624149536] [2024-06-20 16:36:14,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:14,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 16:36:14,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:14,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 16:36:14,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-20 16:36:14,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:14,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 98 transitions, 624 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:14,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:14,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:14,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:14,349 INFO L124 PetriNetUnfolderBase]: 318/667 cut-off events. [2024-06-20 16:36:14,350 INFO L125 PetriNetUnfolderBase]: For 83072/83072 co-relation queries the response was YES. [2024-06-20 16:36:14,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3928 conditions, 667 events. 318/667 cut-off events. For 83072/83072 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3323 event pairs, 96 based on Foata normal form. 6/672 useless extension candidates. Maximal degree in co-relation 3846. Up to 428 conditions per place. [2024-06-20 16:36:14,356 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 64 selfloop transitions, 37 changer transitions 11/114 dead transitions. [2024-06-20 16:36:14,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 114 transitions, 890 flow [2024-06-20 16:36:14,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:36:14,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:36:14,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 108 transitions. [2024-06-20 16:36:14,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31671554252199413 [2024-06-20 16:36:14,357 INFO L175 Difference]: Start difference. First operand has 192 places, 98 transitions, 624 flow. Second operand 11 states and 108 transitions. [2024-06-20 16:36:14,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 114 transitions, 890 flow [2024-06-20 16:36:14,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 114 transitions, 851 flow, removed 13 selfloop flow, removed 13 redundant places. [2024-06-20 16:36:14,463 INFO L231 Difference]: Finished difference. Result has 172 places, 95 transitions, 653 flow [2024-06-20 16:36:14,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=653, PETRI_PLACES=172, PETRI_TRANSITIONS=95} [2024-06-20 16:36:14,463 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 142 predicate places. [2024-06-20 16:36:14,463 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 95 transitions, 653 flow [2024-06-20 16:36:14,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:14,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:14,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:14,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 16:36:14,464 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:14,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:14,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1802156011, now seen corresponding path program 7 times [2024-06-20 16:36:14,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:14,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648542814] [2024-06-20 16:36:14,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:14,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:14,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:36:15,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:15,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648542814] [2024-06-20 16:36:15,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648542814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:15,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:15,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 16:36:15,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180581918] [2024-06-20 16:36:15,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:15,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 16:36:15,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:15,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 16:36:15,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-20 16:36:15,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:15,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 95 transitions, 653 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:15,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:15,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:15,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:15,943 INFO L124 PetriNetUnfolderBase]: 310/651 cut-off events. [2024-06-20 16:36:15,943 INFO L125 PetriNetUnfolderBase]: For 69113/69113 co-relation queries the response was YES. [2024-06-20 16:36:15,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3734 conditions, 651 events. 310/651 cut-off events. For 69113/69113 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3196 event pairs, 96 based on Foata normal form. 6/656 useless extension candidates. Maximal degree in co-relation 3660. Up to 418 conditions per place. [2024-06-20 16:36:15,947 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 65 selfloop transitions, 33 changer transitions 11/111 dead transitions. [2024-06-20 16:36:15,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 111 transitions, 905 flow [2024-06-20 16:36:15,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:36:15,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:36:15,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 107 transitions. [2024-06-20 16:36:15,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31378299120234604 [2024-06-20 16:36:15,948 INFO L175 Difference]: Start difference. First operand has 172 places, 95 transitions, 653 flow. Second operand 11 states and 107 transitions. [2024-06-20 16:36:15,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 111 transitions, 905 flow [2024-06-20 16:36:16,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 111 transitions, 825 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-20 16:36:16,019 INFO L231 Difference]: Finished difference. Result has 168 places, 92 transitions, 627 flow [2024-06-20 16:36:16,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=573, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=627, PETRI_PLACES=168, PETRI_TRANSITIONS=92} [2024-06-20 16:36:16,019 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 138 predicate places. [2024-06-20 16:36:16,019 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 92 transitions, 627 flow [2024-06-20 16:36:16,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:16,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:16,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:16,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 16:36:16,020 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:16,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:16,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1051439597, now seen corresponding path program 8 times [2024-06-20 16:36:16,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:16,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102144154] [2024-06-20 16:36:16,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:16,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:16,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:36:17,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:17,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102144154] [2024-06-20 16:36:17,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102144154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:17,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:17,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:36:17,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186209298] [2024-06-20 16:36:17,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:17,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:36:17,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:17,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:36:17,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:36:17,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:17,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 92 transitions, 627 flow. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:17,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:17,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:17,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:17,325 INFO L124 PetriNetUnfolderBase]: 300/633 cut-off events. [2024-06-20 16:36:17,326 INFO L125 PetriNetUnfolderBase]: For 64735/64735 co-relation queries the response was YES. [2024-06-20 16:36:17,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3606 conditions, 633 events. 300/633 cut-off events. For 64735/64735 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3090 event pairs, 94 based on Foata normal form. 6/638 useless extension candidates. Maximal degree in co-relation 3534. Up to 400 conditions per place. [2024-06-20 16:36:17,329 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 61 selfloop transitions, 31 changer transitions 14/108 dead transitions. [2024-06-20 16:36:17,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 108 transitions, 873 flow [2024-06-20 16:36:17,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:36:17,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:36:17,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 106 transitions. [2024-06-20 16:36:17,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31085043988269795 [2024-06-20 16:36:17,330 INFO L175 Difference]: Start difference. First operand has 168 places, 92 transitions, 627 flow. Second operand 11 states and 106 transitions. [2024-06-20 16:36:17,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 108 transitions, 873 flow [2024-06-20 16:36:17,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 108 transitions, 801 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-20 16:36:17,411 INFO L231 Difference]: Finished difference. Result has 164 places, 88 transitions, 600 flow [2024-06-20 16:36:17,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=600, PETRI_PLACES=164, PETRI_TRANSITIONS=88} [2024-06-20 16:36:17,411 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 134 predicate places. [2024-06-20 16:36:17,411 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 88 transitions, 600 flow [2024-06-20 16:36:17,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:17,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:17,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:17,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 16:36:17,412 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:17,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:17,412 INFO L85 PathProgramCache]: Analyzing trace with hash -389783027, now seen corresponding path program 9 times [2024-06-20 16:36:17,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:17,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251361582] [2024-06-20 16:36:17,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:17,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:17,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:18,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:36:18,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:18,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251361582] [2024-06-20 16:36:18,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251361582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:18,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:18,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:36:18,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777898591] [2024-06-20 16:36:18,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:18,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:36:18,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:18,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:36:18,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:36:18,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:18,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 88 transitions, 600 flow. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:18,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:18,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:18,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:18,895 INFO L124 PetriNetUnfolderBase]: 273/576 cut-off events. [2024-06-20 16:36:18,896 INFO L125 PetriNetUnfolderBase]: For 50455/50455 co-relation queries the response was YES. [2024-06-20 16:36:18,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3056 conditions, 576 events. 273/576 cut-off events. For 50455/50455 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2702 event pairs, 81 based on Foata normal form. 6/581 useless extension candidates. Maximal degree in co-relation 2986. Up to 347 conditions per place. [2024-06-20 16:36:18,899 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 57 selfloop transitions, 30 changer transitions 13/102 dead transitions. [2024-06-20 16:36:18,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 102 transitions, 830 flow [2024-06-20 16:36:18,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:36:18,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:36:18,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 98 transitions. [2024-06-20 16:36:18,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3161290322580645 [2024-06-20 16:36:18,899 INFO L175 Difference]: Start difference. First operand has 164 places, 88 transitions, 600 flow. Second operand 10 states and 98 transitions. [2024-06-20 16:36:18,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 102 transitions, 830 flow [2024-06-20 16:36:18,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 102 transitions, 760 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-20 16:36:18,967 INFO L231 Difference]: Finished difference. Result has 157 places, 82 transitions, 564 flow [2024-06-20 16:36:18,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=147, 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=10, PETRI_FLOW=564, PETRI_PLACES=157, PETRI_TRANSITIONS=82} [2024-06-20 16:36:18,967 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 127 predicate places. [2024-06-20 16:36:18,967 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 82 transitions, 564 flow [2024-06-20 16:36:18,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:18,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:18,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:18,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 16:36:18,967 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:18,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:18,968 INFO L85 PathProgramCache]: Analyzing trace with hash -389956007, now seen corresponding path program 10 times [2024-06-20 16:36:18,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:18,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384971987] [2024-06-20 16:36:18,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:18,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:18,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:20,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:36:20,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:20,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384971987] [2024-06-20 16:36:20,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384971987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:20,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:20,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 16:36:20,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251167086] [2024-06-20 16:36:20,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:20,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 16:36:20,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:20,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 16:36:20,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-20 16:36:20,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:20,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 82 transitions, 564 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:20,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:20,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:20,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:20,492 INFO L124 PetriNetUnfolderBase]: 253/540 cut-off events. [2024-06-20 16:36:20,493 INFO L125 PetriNetUnfolderBase]: For 45369/45369 co-relation queries the response was YES. [2024-06-20 16:36:20,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2881 conditions, 540 events. 253/540 cut-off events. For 45369/45369 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2509 event pairs, 79 based on Foata normal form. 6/545 useless extension candidates. Maximal degree in co-relation 2814. Up to 329 conditions per place. [2024-06-20 16:36:20,495 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 56 selfloop transitions, 26 changer transitions 14/98 dead transitions. [2024-06-20 16:36:20,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 98 transitions, 790 flow [2024-06-20 16:36:20,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:36:20,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:36:20,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 105 transitions. [2024-06-20 16:36:20,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30791788856304986 [2024-06-20 16:36:20,496 INFO L175 Difference]: Start difference. First operand has 157 places, 82 transitions, 564 flow. Second operand 11 states and 105 transitions. [2024-06-20 16:36:20,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 98 transitions, 790 flow [2024-06-20 16:36:20,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 98 transitions, 720 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-20 16:36:20,550 INFO L231 Difference]: Finished difference. Result has 150 places, 78 transitions, 530 flow [2024-06-20 16:36:20,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=530, PETRI_PLACES=150, PETRI_TRANSITIONS=78} [2024-06-20 16:36:20,550 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 120 predicate places. [2024-06-20 16:36:20,550 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 78 transitions, 530 flow [2024-06-20 16:36:20,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:20,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:20,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:20,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 16:36:20,551 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:20,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:20,551 INFO L85 PathProgramCache]: Analyzing trace with hash -836417247, now seen corresponding path program 11 times [2024-06-20 16:36:20,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:20,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019701882] [2024-06-20 16:36:20,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:20,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:20,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:21,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:36:21,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:21,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019701882] [2024-06-20 16:36:21,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019701882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:21,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:21,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:36:21,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961379966] [2024-06-20 16:36:21,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:21,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:36:21,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:21,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:36:21,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:36:21,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:21,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 78 transitions, 530 flow. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:21,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:21,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:21,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:21,790 INFO L124 PetriNetUnfolderBase]: 239/514 cut-off events. [2024-06-20 16:36:21,790 INFO L125 PetriNetUnfolderBase]: For 39072/39072 co-relation queries the response was YES. [2024-06-20 16:36:21,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2697 conditions, 514 events. 239/514 cut-off events. For 39072/39072 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2361 event pairs, 69 based on Foata normal form. 6/519 useless extension candidates. Maximal degree in co-relation 2634. Up to 263 conditions per place. [2024-06-20 16:36:21,793 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 49 selfloop transitions, 21 changer transitions 20/92 dead transitions. [2024-06-20 16:36:21,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 92 transitions, 740 flow [2024-06-20 16:36:21,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:36:21,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:36:21,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 98 transitions. [2024-06-20 16:36:21,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3161290322580645 [2024-06-20 16:36:21,794 INFO L175 Difference]: Start difference. First operand has 150 places, 78 transitions, 530 flow. Second operand 10 states and 98 transitions. [2024-06-20 16:36:21,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 92 transitions, 740 flow [2024-06-20 16:36:21,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 92 transitions, 680 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-20 16:36:21,854 INFO L231 Difference]: Finished difference. Result has 143 places, 66 transitions, 450 flow [2024-06-20 16:36:21,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=450, PETRI_PLACES=143, PETRI_TRANSITIONS=66} [2024-06-20 16:36:21,855 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 113 predicate places. [2024-06-20 16:36:21,855 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 66 transitions, 450 flow [2024-06-20 16:36:21,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:21,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:21,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:21,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 16:36:21,856 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:21,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:21,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1668226579, now seen corresponding path program 12 times [2024-06-20 16:36:21,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:21,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514788232] [2024-06-20 16:36:21,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:21,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:21,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:22,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:36:22,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:22,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514788232] [2024-06-20 16:36:22,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514788232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:22,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:22,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:36:22,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780218407] [2024-06-20 16:36:22,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:22,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:36:22,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:22,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:36:22,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:36:23,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:23,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 66 transitions, 450 flow. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:23,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:23,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:23,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:23,333 INFO L124 PetriNetUnfolderBase]: 202/443 cut-off events. [2024-06-20 16:36:23,333 INFO L125 PetriNetUnfolderBase]: For 34545/34545 co-relation queries the response was YES. [2024-06-20 16:36:23,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2416 conditions, 443 events. 202/443 cut-off events. For 34545/34545 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1951 event pairs, 69 based on Foata normal form. 6/448 useless extension candidates. Maximal degree in co-relation 2356. Up to 259 conditions per place. [2024-06-20 16:36:23,335 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 39 selfloop transitions, 16 changer transitions 23/80 dead transitions. [2024-06-20 16:36:23,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 80 transitions, 636 flow [2024-06-20 16:36:23,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:36:23,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:36:23,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 95 transitions. [2024-06-20 16:36:23,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3064516129032258 [2024-06-20 16:36:23,336 INFO L175 Difference]: Start difference. First operand has 143 places, 66 transitions, 450 flow. Second operand 10 states and 95 transitions. [2024-06-20 16:36:23,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 80 transitions, 636 flow [2024-06-20 16:36:23,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 80 transitions, 565 flow, removed 8 selfloop flow, removed 15 redundant places. [2024-06-20 16:36:23,373 INFO L231 Difference]: Finished difference. Result has 128 places, 53 transitions, 338 flow [2024-06-20 16:36:23,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=338, PETRI_PLACES=128, PETRI_TRANSITIONS=53} [2024-06-20 16:36:23,374 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 98 predicate places. [2024-06-20 16:36:23,374 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 53 transitions, 338 flow [2024-06-20 16:36:23,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:23,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:23,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:23,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 16:36:23,375 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:23,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:23,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1688665037, now seen corresponding path program 13 times [2024-06-20 16:36:23,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:23,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710535876] [2024-06-20 16:36:23,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:23,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:23,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:24,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:36:24,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:24,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710535876] [2024-06-20 16:36:24,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710535876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:24,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:24,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:36:24,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238527823] [2024-06-20 16:36:24,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:24,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:36:24,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:24,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:36:24,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:36:24,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:24,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 53 transitions, 338 flow. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:24,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:24,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:24,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:24,811 INFO L124 PetriNetUnfolderBase]: 166/363 cut-off events. [2024-06-20 16:36:24,811 INFO L125 PetriNetUnfolderBase]: For 25151/25151 co-relation queries the response was YES. [2024-06-20 16:36:24,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1975 conditions, 363 events. 166/363 cut-off events. For 25151/25151 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1548 event pairs, 58 based on Foata normal form. 6/369 useless extension candidates. Maximal degree in co-relation 1922. Up to 211 conditions per place. [2024-06-20 16:36:24,812 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 36 selfloop transitions, 14 changer transitions 14/66 dead transitions. [2024-06-20 16:36:24,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 66 transitions, 494 flow [2024-06-20 16:36:24,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:36:24,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:36:24,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 94 transitions. [2024-06-20 16:36:24,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3032258064516129 [2024-06-20 16:36:24,813 INFO L175 Difference]: Start difference. First operand has 128 places, 53 transitions, 338 flow. Second operand 10 states and 94 transitions. [2024-06-20 16:36:24,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 66 transitions, 494 flow [2024-06-20 16:36:24,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 66 transitions, 435 flow, removed 9 selfloop flow, removed 18 redundant places. [2024-06-20 16:36:24,834 INFO L231 Difference]: Finished difference. Result has 108 places, 45 transitions, 274 flow [2024-06-20 16:36:24,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=274, PETRI_PLACES=108, PETRI_TRANSITIONS=45} [2024-06-20 16:36:24,835 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 78 predicate places. [2024-06-20 16:36:24,835 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 45 transitions, 274 flow [2024-06-20 16:36:24,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:24,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:24,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:24,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 16:36:24,836 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:24,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:24,836 INFO L85 PathProgramCache]: Analyzing trace with hash 705062941, now seen corresponding path program 14 times [2024-06-20 16:36:24,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:24,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439971624] [2024-06-20 16:36:24,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:24,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:24,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:25,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:36:25,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:25,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439971624] [2024-06-20 16:36:25,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439971624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:25,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:25,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:36:25,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464219040] [2024-06-20 16:36:25,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:25,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:36:25,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:25,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:36:25,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:36:25,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:25,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 45 transitions, 274 flow. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:25,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:25,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:25,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:26,044 INFO L124 PetriNetUnfolderBase]: 125/280 cut-off events. [2024-06-20 16:36:26,044 INFO L125 PetriNetUnfolderBase]: For 13806/13806 co-relation queries the response was YES. [2024-06-20 16:36:26,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1383 conditions, 280 events. 125/280 cut-off events. For 13806/13806 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1087 event pairs, 47 based on Foata normal form. 6/286 useless extension candidates. Maximal degree in co-relation 1338. Up to 174 conditions per place. [2024-06-20 16:36:26,045 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 30 selfloop transitions, 11 changer transitions 15/58 dead transitions. [2024-06-20 16:36:26,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 58 transitions, 414 flow [2024-06-20 16:36:26,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:36:26,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:36:26,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 97 transitions. [2024-06-20 16:36:26,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2844574780058651 [2024-06-20 16:36:26,046 INFO L175 Difference]: Start difference. First operand has 108 places, 45 transitions, 274 flow. Second operand 11 states and 97 transitions. [2024-06-20 16:36:26,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 58 transitions, 414 flow [2024-06-20 16:36:26,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 58 transitions, 372 flow, removed 7 selfloop flow, removed 14 redundant places. [2024-06-20 16:36:26,055 INFO L231 Difference]: Finished difference. Result has 97 places, 40 transitions, 233 flow [2024-06-20 16:36:26,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=233, PETRI_PLACES=97, PETRI_TRANSITIONS=40} [2024-06-20 16:36:26,055 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 67 predicate places. [2024-06-20 16:36:26,055 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 40 transitions, 233 flow [2024-06-20 16:36:26,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:26,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:26,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:26,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 16:36:26,056 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:26,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:26,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1410868033, now seen corresponding path program 15 times [2024-06-20 16:36:26,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:26,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434881668] [2024-06-20 16:36:26,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:26,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:26,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:27,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:36:27,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:27,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434881668] [2024-06-20 16:36:27,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434881668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:27,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:27,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:36:27,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970052157] [2024-06-20 16:36:27,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:27,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:36:27,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:27,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:36:27,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:36:27,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:27,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 40 transitions, 233 flow. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:27,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:27,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:27,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:27,229 INFO L124 PetriNetUnfolderBase]: 115/258 cut-off events. [2024-06-20 16:36:27,230 INFO L125 PetriNetUnfolderBase]: For 9356/9356 co-relation queries the response was YES. [2024-06-20 16:36:27,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1199 conditions, 258 events. 115/258 cut-off events. For 9356/9356 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 966 event pairs, 16 based on Foata normal form. 6/264 useless extension candidates. Maximal degree in co-relation 1160. Up to 116 conditions per place. [2024-06-20 16:36:27,231 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 24 selfloop transitions, 13 changer transitions 14/53 dead transitions. [2024-06-20 16:36:27,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 53 transitions, 363 flow [2024-06-20 16:36:27,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:36:27,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:36:27,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 89 transitions. [2024-06-20 16:36:27,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2870967741935484 [2024-06-20 16:36:27,231 INFO L175 Difference]: Start difference. First operand has 97 places, 40 transitions, 233 flow. Second operand 10 states and 89 transitions. [2024-06-20 16:36:27,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 53 transitions, 363 flow [2024-06-20 16:36:27,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 53 transitions, 331 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-20 16:36:27,237 INFO L231 Difference]: Finished difference. Result has 87 places, 34 transitions, 202 flow [2024-06-20 16:36:27,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=202, PETRI_PLACES=87, PETRI_TRANSITIONS=34} [2024-06-20 16:36:27,238 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 57 predicate places. [2024-06-20 16:36:27,238 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 34 transitions, 202 flow [2024-06-20 16:36:27,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:27,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:27,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:27,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 16:36:27,238 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:27,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:27,239 INFO L85 PathProgramCache]: Analyzing trace with hash 2107593625, now seen corresponding path program 16 times [2024-06-20 16:36:27,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:27,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70500018] [2024-06-20 16:36:27,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:27,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:27,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:28,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:36:28,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:28,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70500018] [2024-06-20 16:36:28,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70500018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:28,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:28,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 16:36:28,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651922124] [2024-06-20 16:36:28,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:28,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 16:36:28,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:28,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 16:36:28,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-20 16:36:28,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:28,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 34 transitions, 202 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:28,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:28,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:28,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:28,632 INFO L124 PetriNetUnfolderBase]: 83/190 cut-off events. [2024-06-20 16:36:28,632 INFO L125 PetriNetUnfolderBase]: For 5164/5164 co-relation queries the response was YES. [2024-06-20 16:36:28,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 827 conditions, 190 events. 83/190 cut-off events. For 5164/5164 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 618 event pairs, 30 based on Foata normal form. 6/196 useless extension candidates. Maximal degree in co-relation 792. Up to 105 conditions per place. [2024-06-20 16:36:28,633 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 22 selfloop transitions, 9 changer transitions 14/47 dead transitions. [2024-06-20 16:36:28,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 47 transitions, 320 flow [2024-06-20 16:36:28,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:36:28,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:36:28,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 95 transitions. [2024-06-20 16:36:28,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2785923753665689 [2024-06-20 16:36:28,633 INFO L175 Difference]: Start difference. First operand has 87 places, 34 transitions, 202 flow. Second operand 11 states and 95 transitions. [2024-06-20 16:36:28,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 47 transitions, 320 flow [2024-06-20 16:36:28,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 47 transitions, 282 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-20 16:36:28,637 INFO L231 Difference]: Finished difference. Result has 78 places, 29 transitions, 159 flow [2024-06-20 16:36:28,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=159, PETRI_PLACES=78, PETRI_TRANSITIONS=29} [2024-06-20 16:36:28,638 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 48 predicate places. [2024-06-20 16:36:28,638 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 29 transitions, 159 flow [2024-06-20 16:36:28,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:28,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:28,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:28,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 16:36:28,639 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:28,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:28,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1082671113, now seen corresponding path program 17 times [2024-06-20 16:36:28,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:28,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701987949] [2024-06-20 16:36:28,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:28,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:28,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:29,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:36:29,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:29,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701987949] [2024-06-20 16:36:29,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701987949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:29,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:29,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 16:36:29,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026668967] [2024-06-20 16:36:29,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:29,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 16:36:29,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:29,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 16:36:29,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-20 16:36:29,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:29,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 29 transitions, 159 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:29,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:29,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:29,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:30,091 INFO L124 PetriNetUnfolderBase]: 58/135 cut-off events. [2024-06-20 16:36:30,091 INFO L125 PetriNetUnfolderBase]: For 2158/2158 co-relation queries the response was YES. [2024-06-20 16:36:30,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 135 events. 58/135 cut-off events. For 2158/2158 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 359 event pairs, 15 based on Foata normal form. 6/141 useless extension candidates. Maximal degree in co-relation 466. Up to 52 conditions per place. [2024-06-20 16:36:30,092 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 18 selfloop transitions, 7 changer transitions 15/42 dead transitions. [2024-06-20 16:36:30,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 42 transitions, 267 flow [2024-06-20 16:36:30,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:36:30,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:36:30,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 93 transitions. [2024-06-20 16:36:30,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2727272727272727 [2024-06-20 16:36:30,093 INFO L175 Difference]: Start difference. First operand has 78 places, 29 transitions, 159 flow. Second operand 11 states and 93 transitions. [2024-06-20 16:36:30,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 42 transitions, 267 flow [2024-06-20 16:36:30,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 42 transitions, 239 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-20 16:36:30,095 INFO L231 Difference]: Finished difference. Result has 68 places, 22 transitions, 114 flow [2024-06-20 16:36:30,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=114, PETRI_PLACES=68, PETRI_TRANSITIONS=22} [2024-06-20 16:36:30,095 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 38 predicate places. [2024-06-20 16:36:30,095 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 22 transitions, 114 flow [2024-06-20 16:36:30,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:30,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:36:30,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:30,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 16:36:30,095 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:36:30,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:36:30,096 INFO L85 PathProgramCache]: Analyzing trace with hash 997216991, now seen corresponding path program 18 times [2024-06-20 16:36:30,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:36:30,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937386352] [2024-06-20 16:36:30,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:36:30,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:36:30,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:36:31,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:36:31,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:36:31,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937386352] [2024-06-20 16:36:31,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937386352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:36:31,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:36:31,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-20 16:36:31,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114505996] [2024-06-20 16:36:31,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:36:31,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-20 16:36:31,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:36:31,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-20 16:36:31,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-06-20 16:36:31,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-20 16:36:31,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 22 transitions, 114 flow. Second operand has 14 states, 14 states have (on average 6.214285714285714) internal successors, (87), 14 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:31,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:36:31,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-20 16:36:31,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:36:31,539 INFO L124 PetriNetUnfolderBase]: 24/65 cut-off events. [2024-06-20 16:36:31,539 INFO L125 PetriNetUnfolderBase]: For 676/676 co-relation queries the response was YES. [2024-06-20 16:36:31,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 65 events. 24/65 cut-off events. For 676/676 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 90 event pairs, 0 based on Foata normal form. 6/71 useless extension candidates. Maximal degree in co-relation 172. Up to 24 conditions per place. [2024-06-20 16:36:31,540 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 0 selfloop transitions, 0 changer transitions 31/31 dead transitions. [2024-06-20 16:36:31,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 31 transitions, 160 flow [2024-06-20 16:36:31,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:36:31,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:36:31,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 90 transitions. [2024-06-20 16:36:31,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24193548387096775 [2024-06-20 16:36:31,540 INFO L175 Difference]: Start difference. First operand has 68 places, 22 transitions, 114 flow. Second operand 12 states and 90 transitions. [2024-06-20 16:36:31,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 31 transitions, 160 flow [2024-06-20 16:36:31,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 31 transitions, 126 flow, removed 1 selfloop flow, removed 17 redundant places. [2024-06-20 16:36:31,541 INFO L231 Difference]: Finished difference. Result has 52 places, 0 transitions, 0 flow [2024-06-20 16:36:31,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=0, PETRI_PLACES=52, PETRI_TRANSITIONS=0} [2024-06-20 16:36:31,541 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 22 predicate places. [2024-06-20 16:36:31,541 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 0 transitions, 0 flow [2024-06-20 16:36:31,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.214285714285714) internal successors, (87), 14 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:36:31,544 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-20 16:36:31,545 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-20 16:36:31,546 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-20 16:36:31,546 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-20 16:36:31,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 16:36:31,546 INFO L445 BasicCegarLoop]: Path program histogram: [24, 18, 14, 12, 11, 7, 7, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:36:31,549 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-20 16:36:31,549 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-20 16:36:31,553 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-20 16:36:31,553 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-20 16:36:31,553 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.06 04:36:31 BasicIcfg [2024-06-20 16:36:31,554 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-20 16:36:31,554 INFO L158 Benchmark]: Toolchain (without parser) took 171135.51ms. Allocated memory was 163.6MB in the beginning and 872.4MB in the end (delta: 708.8MB). Free memory was 101.0MB in the beginning and 528.4MB in the end (delta: -427.4MB). Peak memory consumption was 281.8MB. Max. memory is 16.1GB. [2024-06-20 16:36:31,554 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 163.6MB. Free memory was 124.2MB in the beginning and 124.1MB in the end (delta: 140.4kB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-20 16:36:31,554 INFO L158 Benchmark]: Witness Parser took 0.17ms. Allocated memory is still 163.6MB. Free memory is still 106.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-20 16:36:31,554 INFO L158 Benchmark]: CACSL2BoogieTranslator took 685.89ms. Allocated memory is still 163.6MB. Free memory was 100.7MB in the beginning and 67.8MB in the end (delta: 32.8MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2024-06-20 16:36:31,555 INFO L158 Benchmark]: Boogie Procedure Inliner took 86.28ms. Allocated memory is still 163.6MB. Free memory was 67.8MB in the beginning and 64.7MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-20 16:36:31,555 INFO L158 Benchmark]: Boogie Preprocessor took 118.21ms. Allocated memory is still 163.6MB. Free memory was 64.7MB in the beginning and 130.0MB in the end (delta: -65.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-06-20 16:36:31,555 INFO L158 Benchmark]: RCFGBuilder took 637.69ms. Allocated memory is still 163.6MB. Free memory was 130.0MB in the beginning and 80.4MB in the end (delta: 49.6MB). Peak memory consumption was 48.2MB. Max. memory is 16.1GB. [2024-06-20 16:36:31,555 INFO L158 Benchmark]: TraceAbstraction took 169600.69ms. Allocated memory was 163.6MB in the beginning and 872.4MB in the end (delta: 708.8MB). Free memory was 79.7MB in the beginning and 528.4MB in the end (delta: -448.7MB). Peak memory consumption was 260.8MB. Max. memory is 16.1GB. [2024-06-20 16:36:31,556 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 163.6MB. Free memory was 124.2MB in the beginning and 124.1MB in the end (delta: 140.4kB). There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.17ms. Allocated memory is still 163.6MB. Free memory is still 106.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 685.89ms. Allocated memory is still 163.6MB. Free memory was 100.7MB in the beginning and 67.8MB in the end (delta: 32.8MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 86.28ms. Allocated memory is still 163.6MB. Free memory was 67.8MB in the beginning and 64.7MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 118.21ms. Allocated memory is still 163.6MB. Free memory was 64.7MB in the beginning and 130.0MB in the end (delta: -65.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 637.69ms. Allocated memory is still 163.6MB. Free memory was 130.0MB in the beginning and 80.4MB in the end (delta: 49.6MB). Peak memory consumption was 48.2MB. Max. memory is 16.1GB. * TraceAbstraction took 169600.69ms. Allocated memory was 163.6MB in the beginning and 872.4MB in the end (delta: 708.8MB). Free memory was 79.7MB in the beginning and 528.4MB in the end (delta: -448.7MB). Peak memory consumption was 260.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 803]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 804]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 50 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 169.5s, OverallIterations: 133, TraceHistogramMax: 1, PathProgramHistogramMax: 24, EmptinessCheckTime: 0.0s, AutomataDifference: 57.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7857 SdHoareTripleChecker+Valid, 26.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6695 mSDsluCounter, 7431 SdHoareTripleChecker+Invalid, 22.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6575 mSDsCounter, 1687 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 39819 IncrementalHoareTripleChecker+Invalid, 41506 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1687 mSolverCounterUnsat, 856 mSDtfsCounter, 39819 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1373 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1356 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2991 ImplicationChecksByTransitivity, 38.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1729occurred in iteration=54, InterpolantAutomatonStates: 1225, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 109.8s InterpolantComputationTime, 2171 NumberOfCodeBlocks, 2171 NumberOfCodeBlocksAsserted, 133 NumberOfCheckSat, 2038 ConstructedInterpolants, 0 QuantifiedInterpolants, 90973 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 133 InterpolantComputations, 133 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-20 16:36:31,589 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