./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix032.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix032.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix032.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix032.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 20:16:37,426 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:16:37,499 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:16:37,505 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:16:37,506 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:16:37,532 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:16:37,533 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:16:37,533 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:16:37,534 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:16:37,537 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:16:37,537 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:16:37,537 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:16:37,538 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:16:37,539 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:16:37,540 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:16:37,540 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:16:37,540 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:16:37,540 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:16:37,541 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:16:37,541 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:16:37,541 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:16:37,541 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:16:37,542 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:16:37,542 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:16:37,542 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:16:37,542 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:16:37,542 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:16:37,543 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:16:37,543 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:16:37,543 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:16:37,544 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:16:37,544 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:16:37,545 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:16:37,545 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:16:37,545 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:16:37,545 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:16:37,545 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:16:37,546 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:16:37,546 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:16:37,546 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:16:37,546 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:16:37,546 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:16:37,547 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:16:37,547 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:16:37,764 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:16:37,786 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:16:37,788 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:16:37,789 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:16:37,790 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:16:37,791 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix032.opt.yml/witness.yml [2024-06-27 20:16:37,989 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:16:37,989 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:16:37,990 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix032.opt.i [2024-06-27 20:16:39,031 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:16:39,313 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:16:39,316 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix032.opt.i [2024-06-27 20:16:39,329 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c96a741dc/86fdc8ff65334f53bf732116c93be980/FLAGd13388edc [2024-06-27 20:16:39,356 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c96a741dc/86fdc8ff65334f53bf732116c93be980 [2024-06-27 20:16:39,356 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:16:39,358 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:16:39,359 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:16:39,359 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:16:39,363 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:16:39,363 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:16:37" (1/2) ... [2024-06-27 20:16:39,364 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d44d2c7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:16:39, skipping insertion in model container [2024-06-27 20:16:39,364 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:16:37" (1/2) ... [2024-06-27 20:16:39,365 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7d0278c3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:16:39, skipping insertion in model container [2024-06-27 20:16:39,380 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:16:39" (2/2) ... [2024-06-27 20:16:39,381 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d44d2c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:16:39, skipping insertion in model container [2024-06-27 20:16:39,381 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:16:39" (2/2) ... [2024-06-27 20:16:39,381 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:16:39,464 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:16:39,465 INFO L97 edCorrectnessWitness]: Location invariant before [L850-L850] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0) [2024-06-27 20:16:39,465 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0) [2024-06-27 20:16:39,465 INFO L97 edCorrectnessWitness]: Location invariant before [L848-L848] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0) [2024-06-27 20:16:39,465 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:16:39,465 INFO L106 edCorrectnessWitness]: ghost_update [L846-L846] multithreaded = 1; [2024-06-27 20:16:39,507 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:16:39,881 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:16:39,891 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:16:40,003 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:16:40,048 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:16:40,049 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:16:40 WrapperNode [2024-06-27 20:16:40,049 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:16:40,050 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:16:40,050 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:16:40,050 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:16:40,055 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:16:40" (1/1) ... [2024-06-27 20:16:40,066 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:16:40" (1/1) ... [2024-06-27 20:16:40,091 INFO L138 Inliner]: procedures = 175, calls = 51, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 136 [2024-06-27 20:16:40,091 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:16:40,092 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:16:40,092 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:16:40,092 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:16:40,100 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:16:40" (1/1) ... [2024-06-27 20:16:40,100 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:16:40" (1/1) ... [2024-06-27 20:16:40,103 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:16:40" (1/1) ... [2024-06-27 20:16:40,119 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 20:16:40,119 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:16:40" (1/1) ... [2024-06-27 20:16:40,120 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:16:40" (1/1) ... [2024-06-27 20:16:40,127 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:16:40" (1/1) ... [2024-06-27 20:16:40,128 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:16:40" (1/1) ... [2024-06-27 20:16:40,130 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:16:40" (1/1) ... [2024-06-27 20:16:40,131 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:16:40" (1/1) ... [2024-06-27 20:16:40,134 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:16:40,134 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:16:40,134 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:16:40,134 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:16:40,135 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:16:40" (1/1) ... [2024-06-27 20:16:40,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:16:40,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:16:40,171 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 20:16:40,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 20:16:40,205 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:16:40,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:16:40,205 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:16:40,205 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:16:40,206 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:16:40,206 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:16:40,206 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:16:40,206 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:16:40,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:16:40,206 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:16:40,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:16:40,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:16:40,208 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 20:16:40,307 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:16:40,309 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:16:40,584 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:16:40,584 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:16:40,703 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:16:40,703 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:16:40,704 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:16:40 BoogieIcfgContainer [2024-06-27 20:16:40,704 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:16:40,706 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:16:40,706 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:16:40,708 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:16:40,709 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:16:37" (1/4) ... [2024-06-27 20:16:40,710 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24414ee5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:16:40, skipping insertion in model container [2024-06-27 20:16:40,710 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:16:39" (2/4) ... [2024-06-27 20:16:40,711 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24414ee5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:16:40, skipping insertion in model container [2024-06-27 20:16:40,711 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:16:40" (3/4) ... [2024-06-27 20:16:40,711 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24414ee5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:16:40, skipping insertion in model container [2024-06-27 20:16:40,711 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:16:40" (4/4) ... [2024-06-27 20:16:40,712 INFO L112 eAbstractionObserver]: Analyzing ICFG mix032.opt.i [2024-06-27 20:16:40,727 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:16:40,727 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 20:16:40,727 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:16:40,782 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:16:40,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-27 20:16:40,847 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-27 20:16:40,847 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:16:40,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 41 events. 0/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 20:16:40,850 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-27 20:16:40,853 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-27 20:16:40,865 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:16:40,870 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;@541c7c56, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:16:40,870 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 20:16:40,874 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:16:40,875 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 20:16:40,875 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:16:40,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:40,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:16:40,876 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:16:40,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:40,880 INFO L85 PathProgramCache]: Analyzing trace with hash 373099719, now seen corresponding path program 1 times [2024-06-27 20:16:40,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:40,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265212429] [2024-06-27 20:16:40,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:40,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:41,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:41,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:41,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:41,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265212429] [2024-06-27 20:16:41,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265212429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:41,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:41,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:16:41,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722895682] [2024-06-27 20:16:41,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:41,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:16:41,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:41,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:16:41,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:16:42,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-27 20:16:42,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 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) [2024-06-27 20:16:42,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:42,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-27 20:16:42,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:42,298 INFO L124 PetriNetUnfolderBase]: 1059/1731 cut-off events. [2024-06-27 20:16:42,299 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-06-27 20:16:42,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3395 conditions, 1731 events. 1059/1731 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 9218 event pairs, 698 based on Foata normal form. 1/1652 useless extension candidates. Maximal degree in co-relation 3383. Up to 1593 conditions per place. [2024-06-27 20:16:42,316 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 31 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-27 20:16:42,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 175 flow [2024-06-27 20:16:42,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:16:42,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:16:42,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2024-06-27 20:16:42,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6515151515151515 [2024-06-27 20:16:42,328 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 86 transitions. [2024-06-27 20:16:42,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 175 flow [2024-06-27 20:16:42,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 20:16:42,336 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-27 20:16:42,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-27 20:16:42,342 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-27 20:16:42,342 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-27 20:16:42,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 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) [2024-06-27 20:16:42,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:42,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:42,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:16:42,343 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:16:42,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:42,344 INFO L85 PathProgramCache]: Analyzing trace with hash 2066583910, now seen corresponding path program 1 times [2024-06-27 20:16:42,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:42,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319261162] [2024-06-27 20:16:42,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:42,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:42,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:43,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:43,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:43,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319261162] [2024-06-27 20:16:43,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319261162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:43,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:43,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:16:43,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907489536] [2024-06-27 20:16:43,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:43,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:16:43,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:43,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:16:43,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:16:43,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 44 [2024-06-27 20:16:43,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 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) [2024-06-27 20:16:43,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:43,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 44 [2024-06-27 20:16:43,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:43,472 INFO L124 PetriNetUnfolderBase]: 1215/1930 cut-off events. [2024-06-27 20:16:43,473 INFO L125 PetriNetUnfolderBase]: For 384/384 co-relation queries the response was YES. [2024-06-27 20:16:43,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4341 conditions, 1930 events. 1215/1930 cut-off events. For 384/384 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10145 event pairs, 648 based on Foata normal form. 3/1906 useless extension candidates. Maximal degree in co-relation 4329. Up to 1803 conditions per place. [2024-06-27 20:16:43,495 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 39 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-27 20:16:43,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 244 flow [2024-06-27 20:16:43,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:16:43,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:16:43,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-06-27 20:16:43,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6193181818181818 [2024-06-27 20:16:43,499 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 109 transitions. [2024-06-27 20:16:43,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 244 flow [2024-06-27 20:16:43,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:16:43,502 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2024-06-27 20:16:43,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-27 20:16:43,503 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-06-27 20:16:43,503 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2024-06-27 20:16:43,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 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) [2024-06-27 20:16:43,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:43,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:43,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:16:43,506 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:16:43,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:43,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1541329897, now seen corresponding path program 1 times [2024-06-27 20:16:43,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:43,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068213364] [2024-06-27 20:16:43,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:43,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:43,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:44,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:44,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:44,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068213364] [2024-06-27 20:16:44,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068213364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:44,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:44,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:16:44,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063039077] [2024-06-27 20:16:44,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:44,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:16:44,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:44,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:16:44,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:16:44,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-27 20:16:44,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:44,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:44,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-27 20:16:44,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:44,992 INFO L124 PetriNetUnfolderBase]: 1545/2413 cut-off events. [2024-06-27 20:16:44,992 INFO L125 PetriNetUnfolderBase]: For 1270/1270 co-relation queries the response was YES. [2024-06-27 20:16:44,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5985 conditions, 2413 events. 1545/2413 cut-off events. For 1270/1270 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12392 event pairs, 575 based on Foata normal form. 6/2381 useless extension candidates. Maximal degree in co-relation 5971. Up to 2233 conditions per place. [2024-06-27 20:16:45,003 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 51 selfloop transitions, 12 changer transitions 0/71 dead transitions. [2024-06-27 20:16:45,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 71 transitions, 356 flow [2024-06-27 20:16:45,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:16:45,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:16:45,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 20:16:45,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-27 20:16:45,006 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 6 states and 150 transitions. [2024-06-27 20:16:45,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 71 transitions, 356 flow [2024-06-27 20:16:45,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 71 transitions, 336 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 20:16:45,008 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 185 flow [2024-06-27 20:16:45,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=185, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2024-06-27 20:16:45,009 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 7 predicate places. [2024-06-27 20:16:45,009 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 185 flow [2024-06-27 20:16:45,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:45,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:45,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:45,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:16:45,010 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:16:45,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:45,010 INFO L85 PathProgramCache]: Analyzing trace with hash 760140791, now seen corresponding path program 1 times [2024-06-27 20:16:45,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:45,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692205537] [2024-06-27 20:16:45,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:45,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:45,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:45,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:45,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:45,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692205537] [2024-06-27 20:16:45,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692205537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:45,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:45,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:16:45,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775348242] [2024-06-27 20:16:45,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:45,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:16:45,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:45,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:16:45,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:16:45,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-27 20:16:45,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 185 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 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) [2024-06-27 20:16:45,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:45,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-27 20:16:45,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:46,040 INFO L124 PetriNetUnfolderBase]: 1333/2159 cut-off events. [2024-06-27 20:16:46,040 INFO L125 PetriNetUnfolderBase]: For 2120/2120 co-relation queries the response was YES. [2024-06-27 20:16:46,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5813 conditions, 2159 events. 1333/2159 cut-off events. For 2120/2120 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 11356 event pairs, 592 based on Foata normal form. 2/2113 useless extension candidates. Maximal degree in co-relation 5796. Up to 1980 conditions per place. [2024-06-27 20:16:46,052 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 43 selfloop transitions, 8 changer transitions 0/59 dead transitions. [2024-06-27 20:16:46,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 59 transitions, 329 flow [2024-06-27 20:16:46,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:16:46,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:16:46,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-06-27 20:16:46,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 20:16:46,054 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 185 flow. Second operand 5 states and 110 transitions. [2024-06-27 20:16:46,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 59 transitions, 329 flow [2024-06-27 20:16:46,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 302 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 20:16:46,057 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 202 flow [2024-06-27 20:16:46,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=202, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2024-06-27 20:16:46,058 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 9 predicate places. [2024-06-27 20:16:46,058 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 202 flow [2024-06-27 20:16:46,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 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) [2024-06-27 20:16:46,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:46,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:46,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:16:46,059 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:16:46,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:46,059 INFO L85 PathProgramCache]: Analyzing trace with hash 2077910643, now seen corresponding path program 1 times [2024-06-27 20:16:46,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:46,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163411863] [2024-06-27 20:16:46,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:46,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:46,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:46,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:46,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:46,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163411863] [2024-06-27 20:16:46,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163411863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:46,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:46,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:16:46,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286345875] [2024-06-27 20:16:46,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:46,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:16:46,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:46,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:16:46,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:16:46,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:16:46,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 202 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:46,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:46,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:16:46,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:47,280 INFO L124 PetriNetUnfolderBase]: 1571/2550 cut-off events. [2024-06-27 20:16:47,281 INFO L125 PetriNetUnfolderBase]: For 3658/3658 co-relation queries the response was YES. [2024-06-27 20:16:47,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7293 conditions, 2550 events. 1571/2550 cut-off events. For 3658/3658 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13586 event pairs, 706 based on Foata normal form. 2/2526 useless extension candidates. Maximal degree in co-relation 7274. Up to 2317 conditions per place. [2024-06-27 20:16:47,295 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 48 selfloop transitions, 11 changer transitions 0/66 dead transitions. [2024-06-27 20:16:47,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 66 transitions, 376 flow [2024-06-27 20:16:47,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:16:47,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:16:47,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-27 20:16:47,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4734848484848485 [2024-06-27 20:16:47,297 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 202 flow. Second operand 6 states and 125 transitions. [2024-06-27 20:16:47,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 66 transitions, 376 flow [2024-06-27 20:16:47,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 66 transitions, 356 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 20:16:47,306 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 236 flow [2024-06-27 20:16:47,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=236, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2024-06-27 20:16:47,307 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 12 predicate places. [2024-06-27 20:16:47,308 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 236 flow [2024-06-27 20:16:47,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:47,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:47,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:47,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:16:47,309 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:16:47,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:47,310 INFO L85 PathProgramCache]: Analyzing trace with hash 944682456, now seen corresponding path program 1 times [2024-06-27 20:16:47,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:47,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425613984] [2024-06-27 20:16:47,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:47,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:47,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:48,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:48,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:48,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425613984] [2024-06-27 20:16:48,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425613984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:48,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:48,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:16:48,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679003171] [2024-06-27 20:16:48,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:48,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:16:48,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:48,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:16:48,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:16:48,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:16:48,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 236 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:48,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:48,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:16:48,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:48,572 INFO L124 PetriNetUnfolderBase]: 1718/2720 cut-off events. [2024-06-27 20:16:48,572 INFO L125 PetriNetUnfolderBase]: For 6155/6161 co-relation queries the response was YES. [2024-06-27 20:16:48,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8524 conditions, 2720 events. 1718/2720 cut-off events. For 6155/6161 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14275 event pairs, 749 based on Foata normal form. 6/2709 useless extension candidates. Maximal degree in co-relation 8504. Up to 2498 conditions per place. [2024-06-27 20:16:48,589 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 53 selfloop transitions, 16 changer transitions 0/77 dead transitions. [2024-06-27 20:16:48,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 77 transitions, 484 flow [2024-06-27 20:16:48,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:16:48,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:16:48,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-27 20:16:48,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 20:16:48,591 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 236 flow. Second operand 6 states and 132 transitions. [2024-06-27 20:16:48,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 77 transitions, 484 flow [2024-06-27 20:16:48,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 77 transitions, 454 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 20:16:48,594 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 292 flow [2024-06-27 20:16:48,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=292, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2024-06-27 20:16:48,595 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 14 predicate places. [2024-06-27 20:16:48,595 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 292 flow [2024-06-27 20:16:48,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:48,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:48,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:48,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:16:48,596 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:16:48,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:48,596 INFO L85 PathProgramCache]: Analyzing trace with hash 363399090, now seen corresponding path program 2 times [2024-06-27 20:16:48,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:48,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534498335] [2024-06-27 20:16:48,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:48,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:48,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:49,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:49,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:49,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534498335] [2024-06-27 20:16:49,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534498335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:49,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:49,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:16:49,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437346034] [2024-06-27 20:16:49,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:49,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:16:49,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:49,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:16:49,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:16:49,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:16:49,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 292 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:49,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:49,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:16:49,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:49,770 INFO L124 PetriNetUnfolderBase]: 1713/2714 cut-off events. [2024-06-27 20:16:49,770 INFO L125 PetriNetUnfolderBase]: For 8331/8337 co-relation queries the response was YES. [2024-06-27 20:16:49,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9126 conditions, 2714 events. 1713/2714 cut-off events. For 8331/8337 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14268 event pairs, 752 based on Foata normal form. 6/2702 useless extension candidates. Maximal degree in co-relation 9105. Up to 2493 conditions per place. [2024-06-27 20:16:49,795 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 48 selfloop transitions, 16 changer transitions 0/72 dead transitions. [2024-06-27 20:16:49,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 72 transitions, 458 flow [2024-06-27 20:16:49,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:16:49,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:16:49,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-27 20:16:49,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4810606060606061 [2024-06-27 20:16:49,797 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 292 flow. Second operand 6 states and 127 transitions. [2024-06-27 20:16:49,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 72 transitions, 458 flow [2024-06-27 20:16:49,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 72 transitions, 424 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-27 20:16:49,802 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 298 flow [2024-06-27 20:16:49,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=298, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2024-06-27 20:16:49,803 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 18 predicate places. [2024-06-27 20:16:49,803 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 298 flow [2024-06-27 20:16:49,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:49,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:49,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:49,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:16:49,804 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:16:49,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:49,804 INFO L85 PathProgramCache]: Analyzing trace with hash 350894806, now seen corresponding path program 1 times [2024-06-27 20:16:49,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:49,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112221017] [2024-06-27 20:16:49,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:49,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:49,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:50,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:50,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:50,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112221017] [2024-06-27 20:16:50,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112221017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:50,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:50,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:16:50,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929664146] [2024-06-27 20:16:50,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:50,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:16:50,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:50,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:16:50,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:16:50,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:16:50,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 298 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:50,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:50,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:16:50,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:51,285 INFO L124 PetriNetUnfolderBase]: 1567/2569 cut-off events. [2024-06-27 20:16:51,285 INFO L125 PetriNetUnfolderBase]: For 8128/8128 co-relation queries the response was YES. [2024-06-27 20:16:51,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8524 conditions, 2569 events. 1567/2569 cut-off events. For 8128/8128 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13753 event pairs, 652 based on Foata normal form. 4/2560 useless extension candidates. Maximal degree in co-relation 8501. Up to 2294 conditions per place. [2024-06-27 20:16:51,300 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 59 selfloop transitions, 14 changer transitions 0/80 dead transitions. [2024-06-27 20:16:51,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 80 transitions, 518 flow [2024-06-27 20:16:51,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:16:51,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:16:51,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-27 20:16:51,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4707792207792208 [2024-06-27 20:16:51,302 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 298 flow. Second operand 7 states and 145 transitions. [2024-06-27 20:16:51,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 80 transitions, 518 flow [2024-06-27 20:16:51,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 80 transitions, 474 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 20:16:51,307 INFO L231 Difference]: Finished difference. Result has 64 places, 60 transitions, 320 flow [2024-06-27 20:16:51,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=320, PETRI_PLACES=64, PETRI_TRANSITIONS=60} [2024-06-27 20:16:51,309 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 19 predicate places. [2024-06-27 20:16:51,309 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 60 transitions, 320 flow [2024-06-27 20:16:51,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:51,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:51,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:51,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:16:51,310 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:16:51,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:51,310 INFO L85 PathProgramCache]: Analyzing trace with hash -2013841752, now seen corresponding path program 1 times [2024-06-27 20:16:51,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:51,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24342390] [2024-06-27 20:16:51,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:51,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:51,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:52,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:52,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:52,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24342390] [2024-06-27 20:16:52,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24342390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:52,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:52,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:16:52,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837895704] [2024-06-27 20:16:52,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:52,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:16:52,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:52,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:16:52,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:16:52,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:16:52,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 60 transitions, 320 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:52,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:52,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:16:52,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:52,851 INFO L124 PetriNetUnfolderBase]: 1714/2731 cut-off events. [2024-06-27 20:16:52,852 INFO L125 PetriNetUnfolderBase]: For 12078/12078 co-relation queries the response was YES. [2024-06-27 20:16:52,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9853 conditions, 2731 events. 1714/2731 cut-off events. For 12078/12078 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14407 event pairs, 700 based on Foata normal form. 2/2719 useless extension candidates. Maximal degree in co-relation 9830. Up to 2498 conditions per place. [2024-06-27 20:16:52,868 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 66 selfloop transitions, 14 changer transitions 0/88 dead transitions. [2024-06-27 20:16:52,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 88 transitions, 570 flow [2024-06-27 20:16:52,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:16:52,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:16:52,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-27 20:16:52,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.487012987012987 [2024-06-27 20:16:52,869 INFO L175 Difference]: Start difference. First operand has 64 places, 60 transitions, 320 flow. Second operand 7 states and 150 transitions. [2024-06-27 20:16:52,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 88 transitions, 570 flow [2024-06-27 20:16:52,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 88 transitions, 528 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 20:16:52,876 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 346 flow [2024-06-27 20:16:52,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=346, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2024-06-27 20:16:52,876 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 21 predicate places. [2024-06-27 20:16:52,877 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 346 flow [2024-06-27 20:16:52,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:52,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:52,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:52,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:16:52,877 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:16:52,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:52,878 INFO L85 PathProgramCache]: Analyzing trace with hash -779614030, now seen corresponding path program 2 times [2024-06-27 20:16:52,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:52,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960073634] [2024-06-27 20:16:52,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:52,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:52,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:53,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:53,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:53,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960073634] [2024-06-27 20:16:53,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960073634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:53,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:53,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:16:53,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859161102] [2024-06-27 20:16:53,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:53,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:16:53,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:53,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:16:53,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:16:53,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:16:53,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 346 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:53,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:53,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:16:53,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:54,305 INFO L124 PetriNetUnfolderBase]: 1723/2755 cut-off events. [2024-06-27 20:16:54,306 INFO L125 PetriNetUnfolderBase]: For 15307/15313 co-relation queries the response was YES. [2024-06-27 20:16:54,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10506 conditions, 2755 events. 1723/2755 cut-off events. For 15307/15313 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14648 event pairs, 702 based on Foata normal form. 6/2746 useless extension candidates. Maximal degree in co-relation 10482. Up to 2465 conditions per place. [2024-06-27 20:16:54,321 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 59 selfloop transitions, 26 changer transitions 0/93 dead transitions. [2024-06-27 20:16:54,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 93 transitions, 676 flow [2024-06-27 20:16:54,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:16:54,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:16:54,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-27 20:16:54,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4967532467532468 [2024-06-27 20:16:54,322 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 346 flow. Second operand 7 states and 153 transitions. [2024-06-27 20:16:54,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 93 transitions, 676 flow [2024-06-27 20:16:54,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 93 transitions, 632 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 20:16:54,329 INFO L231 Difference]: Finished difference. Result has 68 places, 69 transitions, 432 flow [2024-06-27 20:16:54,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=432, PETRI_PLACES=68, PETRI_TRANSITIONS=69} [2024-06-27 20:16:54,330 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 23 predicate places. [2024-06-27 20:16:54,330 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 69 transitions, 432 flow [2024-06-27 20:16:54,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:54,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:54,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:54,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:16:54,331 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:16:54,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:54,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1819897506, now seen corresponding path program 1 times [2024-06-27 20:16:54,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:54,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193631419] [2024-06-27 20:16:54,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:54,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:54,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:55,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:55,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:55,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193631419] [2024-06-27 20:16:55,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193631419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:55,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:55,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:16:55,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588949413] [2024-06-27 20:16:55,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:55,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:16:55,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:55,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:16:55,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:16:55,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:16:55,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 69 transitions, 432 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:55,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:55,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:16:55,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:55,810 INFO L124 PetriNetUnfolderBase]: 1844/2880 cut-off events. [2024-06-27 20:16:55,810 INFO L125 PetriNetUnfolderBase]: For 19027/19033 co-relation queries the response was YES. [2024-06-27 20:16:55,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11568 conditions, 2880 events. 1844/2880 cut-off events. For 19027/19033 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14817 event pairs, 752 based on Foata normal form. 3/2867 useless extension candidates. Maximal degree in co-relation 11543. Up to 2651 conditions per place. [2024-06-27 20:16:55,827 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 70 selfloop transitions, 23 changer transitions 0/99 dead transitions. [2024-06-27 20:16:55,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 99 transitions, 774 flow [2024-06-27 20:16:55,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:16:55,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:16:55,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-27 20:16:55,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 20:16:55,830 INFO L175 Difference]: Start difference. First operand has 68 places, 69 transitions, 432 flow. Second operand 7 states and 147 transitions. [2024-06-27 20:16:55,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 99 transitions, 774 flow [2024-06-27 20:16:55,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 99 transitions, 732 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 20:16:55,839 INFO L231 Difference]: Finished difference. Result has 72 places, 75 transitions, 506 flow [2024-06-27 20:16:55,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=506, PETRI_PLACES=72, PETRI_TRANSITIONS=75} [2024-06-27 20:16:55,840 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 27 predicate places. [2024-06-27 20:16:55,840 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 75 transitions, 506 flow [2024-06-27 20:16:55,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:55,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:55,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:55,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:16:55,841 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:16:55,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:55,841 INFO L85 PathProgramCache]: Analyzing trace with hash -402280294, now seen corresponding path program 2 times [2024-06-27 20:16:55,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:55,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444215288] [2024-06-27 20:16:55,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:55,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:55,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:56,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:56,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:56,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444215288] [2024-06-27 20:16:56,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444215288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:56,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:56,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:16:56,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106048060] [2024-06-27 20:16:56,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:56,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:16:56,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:56,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:16:56,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:16:56,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:16:56,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 75 transitions, 506 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:56,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:56,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:16:56,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:57,163 INFO L124 PetriNetUnfolderBase]: 1855/2897 cut-off events. [2024-06-27 20:16:57,164 INFO L125 PetriNetUnfolderBase]: For 22580/22586 co-relation queries the response was YES. [2024-06-27 20:16:57,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12292 conditions, 2897 events. 1855/2897 cut-off events. For 22580/22586 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14901 event pairs, 751 based on Foata normal form. 6/2886 useless extension candidates. Maximal degree in co-relation 12265. Up to 2663 conditions per place. [2024-06-27 20:16:57,178 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 66 selfloop transitions, 27 changer transitions 0/99 dead transitions. [2024-06-27 20:16:57,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 99 transitions, 822 flow [2024-06-27 20:16:57,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:16:57,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:16:57,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-27 20:16:57,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 20:16:57,180 INFO L175 Difference]: Start difference. First operand has 72 places, 75 transitions, 506 flow. Second operand 7 states and 143 transitions. [2024-06-27 20:16:57,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 99 transitions, 822 flow [2024-06-27 20:16:57,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 99 transitions, 786 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 20:16:57,192 INFO L231 Difference]: Finished difference. Result has 76 places, 78 transitions, 566 flow [2024-06-27 20:16:57,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=566, PETRI_PLACES=76, PETRI_TRANSITIONS=78} [2024-06-27 20:16:57,193 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 31 predicate places. [2024-06-27 20:16:57,193 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 78 transitions, 566 flow [2024-06-27 20:16:57,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:57,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:57,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:57,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:16:57,194 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:16:57,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:57,194 INFO L85 PathProgramCache]: Analyzing trace with hash -287875014, now seen corresponding path program 3 times [2024-06-27 20:16:57,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:57,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242984616] [2024-06-27 20:16:57,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:57,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:57,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:57,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:57,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:57,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242984616] [2024-06-27 20:16:57,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242984616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:57,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:57,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:16:57,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004186157] [2024-06-27 20:16:57,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:57,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:16:57,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:57,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:16:57,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:16:57,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:16:57,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 78 transitions, 566 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:57,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:57,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:16:57,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:58,397 INFO L124 PetriNetUnfolderBase]: 1747/2784 cut-off events. [2024-06-27 20:16:58,397 INFO L125 PetriNetUnfolderBase]: For 25428/25431 co-relation queries the response was YES. [2024-06-27 20:16:58,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12140 conditions, 2784 events. 1747/2784 cut-off events. For 25428/25431 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14667 event pairs, 706 based on Foata normal form. 2/2767 useless extension candidates. Maximal degree in co-relation 12111. Up to 2487 conditions per place. [2024-06-27 20:16:58,412 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 60 selfloop transitions, 26 changer transitions 0/97 dead transitions. [2024-06-27 20:16:58,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 97 transitions, 786 flow [2024-06-27 20:16:58,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:16:58,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:16:58,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-27 20:16:58,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4805194805194805 [2024-06-27 20:16:58,414 INFO L175 Difference]: Start difference. First operand has 76 places, 78 transitions, 566 flow. Second operand 7 states and 148 transitions. [2024-06-27 20:16:58,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 97 transitions, 786 flow [2024-06-27 20:16:58,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 97 transitions, 702 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 20:16:58,426 INFO L231 Difference]: Finished difference. Result has 79 places, 78 transitions, 542 flow [2024-06-27 20:16:58,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=542, PETRI_PLACES=79, PETRI_TRANSITIONS=78} [2024-06-27 20:16:58,427 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 34 predicate places. [2024-06-27 20:16:58,427 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 78 transitions, 542 flow [2024-06-27 20:16:58,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:58,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:58,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:58,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:16:58,428 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:16:58,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:58,428 INFO L85 PathProgramCache]: Analyzing trace with hash -287874828, now seen corresponding path program 3 times [2024-06-27 20:16:58,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:58,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454130061] [2024-06-27 20:16:58,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:58,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:59,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:59,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:59,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454130061] [2024-06-27 20:16:59,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454130061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:59,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:59,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:16:59,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589404195] [2024-06-27 20:16:59,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:59,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:16:59,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:59,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:16:59,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:16:59,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:16:59,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 78 transitions, 542 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:59,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:59,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:16:59,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:59,813 INFO L124 PetriNetUnfolderBase]: 1845/2883 cut-off events. [2024-06-27 20:16:59,814 INFO L125 PetriNetUnfolderBase]: For 28324/28330 co-relation queries the response was YES. [2024-06-27 20:16:59,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12737 conditions, 2883 events. 1845/2883 cut-off events. For 28324/28330 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14863 event pairs, 751 based on Foata normal form. 6/2872 useless extension candidates. Maximal degree in co-relation 12707. Up to 2651 conditions per place. [2024-06-27 20:16:59,830 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 65 selfloop transitions, 26 changer transitions 0/97 dead transitions. [2024-06-27 20:16:59,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 97 transitions, 772 flow [2024-06-27 20:16:59,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:16:59,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:16:59,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-27 20:16:59,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.461038961038961 [2024-06-27 20:16:59,831 INFO L175 Difference]: Start difference. First operand has 79 places, 78 transitions, 542 flow. Second operand 7 states and 142 transitions. [2024-06-27 20:16:59,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 97 transitions, 772 flow [2024-06-27 20:16:59,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 97 transitions, 688 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 20:16:59,844 INFO L231 Difference]: Finished difference. Result has 80 places, 78 transitions, 518 flow [2024-06-27 20:16:59,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=518, PETRI_PLACES=80, PETRI_TRANSITIONS=78} [2024-06-27 20:16:59,845 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 35 predicate places. [2024-06-27 20:16:59,845 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 78 transitions, 518 flow [2024-06-27 20:16:59,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:59,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:59,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:59,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:16:59,846 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:16:59,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:59,846 INFO L85 PathProgramCache]: Analyzing trace with hash -870723043, now seen corresponding path program 1 times [2024-06-27 20:16:59,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:59,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688794979] [2024-06-27 20:16:59,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:59,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:59,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:00,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:00,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:00,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688794979] [2024-06-27 20:17:00,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688794979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:00,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:00,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:17:00,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054393696] [2024-06-27 20:17:00,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:00,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:17:00,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:00,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:17:00,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:17:00,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-27 20:17:00,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 78 transitions, 518 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:00,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:00,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-27 20:17:00,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:00,961 INFO L124 PetriNetUnfolderBase]: 1386/2407 cut-off events. [2024-06-27 20:17:00,961 INFO L125 PetriNetUnfolderBase]: For 26296/26296 co-relation queries the response was YES. [2024-06-27 20:17:00,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10593 conditions, 2407 events. 1386/2407 cut-off events. For 26296/26296 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 13759 event pairs, 588 based on Foata normal form. 1/2393 useless extension candidates. Maximal degree in co-relation 10562. Up to 2045 conditions per place. [2024-06-27 20:17:00,977 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 62 selfloop transitions, 8 changer transitions 0/89 dead transitions. [2024-06-27 20:17:00,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 89 transitions, 698 flow [2024-06-27 20:17:00,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:17:00,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:17:00,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-06-27 20:17:00,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 20:17:00,979 INFO L175 Difference]: Start difference. First operand has 80 places, 78 transitions, 518 flow. Second operand 5 states and 110 transitions. [2024-06-27 20:17:00,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 89 transitions, 698 flow [2024-06-27 20:17:00,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 89 transitions, 624 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 20:17:00,993 INFO L231 Difference]: Finished difference. Result has 78 places, 81 transitions, 492 flow [2024-06-27 20:17:00,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=492, PETRI_PLACES=78, PETRI_TRANSITIONS=81} [2024-06-27 20:17:00,995 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 33 predicate places. [2024-06-27 20:17:00,995 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 81 transitions, 492 flow [2024-06-27 20:17:00,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:00,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:00,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:00,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:17:00,996 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:00,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:00,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1534018644, now seen corresponding path program 1 times [2024-06-27 20:17:00,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:00,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504058607] [2024-06-27 20:17:00,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:00,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:01,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:01,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:01,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:01,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504058607] [2024-06-27 20:17:01,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504058607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:01,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:01,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:01,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007683628] [2024-06-27 20:17:01,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:01,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:01,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:01,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:01,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:02,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:02,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 81 transitions, 492 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:02,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:02,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:02,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:02,683 INFO L124 PetriNetUnfolderBase]: 1853/2893 cut-off events. [2024-06-27 20:17:02,691 INFO L125 PetriNetUnfolderBase]: For 34682/34682 co-relation queries the response was YES. [2024-06-27 20:17:02,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13475 conditions, 2893 events. 1853/2893 cut-off events. For 34682/34682 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14821 event pairs, 722 based on Foata normal form. 2/2892 useless extension candidates. Maximal degree in co-relation 13443. Up to 2693 conditions per place. [2024-06-27 20:17:02,705 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 90 selfloop transitions, 17 changer transitions 0/113 dead transitions. [2024-06-27 20:17:02,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 113 transitions, 816 flow [2024-06-27 20:17:02,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:02,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:02,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-27 20:17:02,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-06-27 20:17:02,708 INFO L175 Difference]: Start difference. First operand has 78 places, 81 transitions, 492 flow. Second operand 8 states and 162 transitions. [2024-06-27 20:17:02,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 113 transitions, 816 flow [2024-06-27 20:17:02,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 113 transitions, 790 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 20:17:02,721 INFO L231 Difference]: Finished difference. Result has 83 places, 84 transitions, 550 flow [2024-06-27 20:17:02,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=550, PETRI_PLACES=83, PETRI_TRANSITIONS=84} [2024-06-27 20:17:02,721 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 38 predicate places. [2024-06-27 20:17:02,722 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 84 transitions, 550 flow [2024-06-27 20:17:02,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:02,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:02,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:02,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:17:02,723 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:02,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:02,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1601775735, now seen corresponding path program 1 times [2024-06-27 20:17:02,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:02,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61234869] [2024-06-27 20:17:02,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:02,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:02,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:03,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:03,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:03,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61234869] [2024-06-27 20:17:03,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61234869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:03,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:03,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:03,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809037805] [2024-06-27 20:17:03,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:03,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:03,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:03,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:03,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:03,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:03,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 84 transitions, 550 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:03,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:03,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:03,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:04,183 INFO L124 PetriNetUnfolderBase]: 1875/2929 cut-off events. [2024-06-27 20:17:04,184 INFO L125 PetriNetUnfolderBase]: For 39993/39996 co-relation queries the response was YES. [2024-06-27 20:17:04,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14261 conditions, 2929 events. 1875/2929 cut-off events. For 39993/39996 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15014 event pairs, 680 based on Foata normal form. 4/2929 useless extension candidates. Maximal degree in co-relation 14228. Up to 2620 conditions per place. [2024-06-27 20:17:04,200 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 83 selfloop transitions, 32 changer transitions 0/121 dead transitions. [2024-06-27 20:17:04,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 121 transitions, 986 flow [2024-06-27 20:17:04,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:04,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:04,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-27 20:17:04,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48295454545454547 [2024-06-27 20:17:04,201 INFO L175 Difference]: Start difference. First operand has 83 places, 84 transitions, 550 flow. Second operand 8 states and 170 transitions. [2024-06-27 20:17:04,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 121 transitions, 986 flow [2024-06-27 20:17:04,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 121 transitions, 926 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 20:17:04,217 INFO L231 Difference]: Finished difference. Result has 85 places, 90 transitions, 636 flow [2024-06-27 20:17:04,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=636, PETRI_PLACES=85, PETRI_TRANSITIONS=90} [2024-06-27 20:17:04,218 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 40 predicate places. [2024-06-27 20:17:04,218 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 90 transitions, 636 flow [2024-06-27 20:17:04,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:04,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:04,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:04,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:17:04,219 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:04,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:04,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1601775518, now seen corresponding path program 2 times [2024-06-27 20:17:04,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:04,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607941702] [2024-06-27 20:17:04,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:04,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:04,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:05,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:05,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:05,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607941702] [2024-06-27 20:17:05,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607941702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:05,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:05,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:05,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319071708] [2024-06-27 20:17:05,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:05,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:05,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:05,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:05,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:05,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:05,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 90 transitions, 636 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:05,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:05,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:05,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:05,888 INFO L124 PetriNetUnfolderBase]: 1902/2972 cut-off events. [2024-06-27 20:17:05,888 INFO L125 PetriNetUnfolderBase]: For 45964/45967 co-relation queries the response was YES. [2024-06-27 20:17:05,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15153 conditions, 2972 events. 1902/2972 cut-off events. For 45964/45967 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15271 event pairs, 708 based on Foata normal form. 2/2970 useless extension candidates. Maximal degree in co-relation 15119. Up to 2642 conditions per place. [2024-06-27 20:17:05,905 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 79 selfloop transitions, 44 changer transitions 0/129 dead transitions. [2024-06-27 20:17:05,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 129 transitions, 1220 flow [2024-06-27 20:17:05,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:05,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:05,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-27 20:17:05,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48295454545454547 [2024-06-27 20:17:05,907 INFO L175 Difference]: Start difference. First operand has 85 places, 90 transitions, 636 flow. Second operand 8 states and 170 transitions. [2024-06-27 20:17:05,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 129 transitions, 1220 flow [2024-06-27 20:17:05,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 129 transitions, 1172 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 20:17:05,927 INFO L231 Difference]: Finished difference. Result has 89 places, 99 transitions, 822 flow [2024-06-27 20:17:05,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=822, PETRI_PLACES=89, PETRI_TRANSITIONS=99} [2024-06-27 20:17:05,928 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 44 predicate places. [2024-06-27 20:17:05,928 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 99 transitions, 822 flow [2024-06-27 20:17:05,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:05,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:05,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:05,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:17:05,929 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:05,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:05,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1601769938, now seen corresponding path program 3 times [2024-06-27 20:17:05,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:05,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907484550] [2024-06-27 20:17:05,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:05,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:06,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:06,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:06,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907484550] [2024-06-27 20:17:06,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907484550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:06,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:06,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:06,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314107505] [2024-06-27 20:17:06,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:06,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:06,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:06,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:06,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:06,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:06,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 99 transitions, 822 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:06,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:06,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:06,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:07,571 INFO L124 PetriNetUnfolderBase]: 1897/2965 cut-off events. [2024-06-27 20:17:07,571 INFO L125 PetriNetUnfolderBase]: For 51509/51512 co-relation queries the response was YES. [2024-06-27 20:17:07,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15758 conditions, 2965 events. 1897/2965 cut-off events. For 51509/51512 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15247 event pairs, 713 based on Foata normal form. 2/2963 useless extension candidates. Maximal degree in co-relation 15722. Up to 2637 conditions per place. [2024-06-27 20:17:07,586 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 78 selfloop transitions, 43 changer transitions 0/127 dead transitions. [2024-06-27 20:17:07,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 127 transitions, 1204 flow [2024-06-27 20:17:07,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:07,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:07,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-27 20:17:07,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48011363636363635 [2024-06-27 20:17:07,588 INFO L175 Difference]: Start difference. First operand has 89 places, 99 transitions, 822 flow. Second operand 8 states and 169 transitions. [2024-06-27 20:17:07,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 127 transitions, 1204 flow [2024-06-27 20:17:07,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 127 transitions, 1120 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-27 20:17:07,610 INFO L231 Difference]: Finished difference. Result has 94 places, 99 transitions, 832 flow [2024-06-27 20:17:07,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=738, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=832, PETRI_PLACES=94, PETRI_TRANSITIONS=99} [2024-06-27 20:17:07,611 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 49 predicate places. [2024-06-27 20:17:07,611 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 99 transitions, 832 flow [2024-06-27 20:17:07,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:07,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:07,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:07,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:17:07,611 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:07,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:07,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1341828049, now seen corresponding path program 2 times [2024-06-27 20:17:07,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:07,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081603685] [2024-06-27 20:17:07,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:07,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:07,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:08,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:08,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:08,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081603685] [2024-06-27 20:17:08,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081603685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:08,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:08,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:08,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225362732] [2024-06-27 20:17:08,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:08,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:08,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:08,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:08,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:08,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:08,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 99 transitions, 832 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:08,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:08,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:08,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:09,333 INFO L124 PetriNetUnfolderBase]: 1919/3003 cut-off events. [2024-06-27 20:17:09,333 INFO L125 PetriNetUnfolderBase]: For 56763/56769 co-relation queries the response was YES. [2024-06-27 20:17:09,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16247 conditions, 3003 events. 1919/3003 cut-off events. For 56763/56769 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15494 event pairs, 671 based on Foata normal form. 8/3006 useless extension candidates. Maximal degree in co-relation 16209. Up to 2671 conditions per place. [2024-06-27 20:17:09,351 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 85 selfloop transitions, 38 changer transitions 0/129 dead transitions. [2024-06-27 20:17:09,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 129 transitions, 1258 flow [2024-06-27 20:17:09,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:09,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:09,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-27 20:17:09,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-27 20:17:09,352 INFO L175 Difference]: Start difference. First operand has 94 places, 99 transitions, 832 flow. Second operand 8 states and 164 transitions. [2024-06-27 20:17:09,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 129 transitions, 1258 flow [2024-06-27 20:17:09,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 129 transitions, 1170 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 20:17:09,378 INFO L231 Difference]: Finished difference. Result has 96 places, 102 transitions, 868 flow [2024-06-27 20:17:09,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=744, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=868, PETRI_PLACES=96, PETRI_TRANSITIONS=102} [2024-06-27 20:17:09,378 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 51 predicate places. [2024-06-27 20:17:09,379 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 102 transitions, 868 flow [2024-06-27 20:17:09,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:09,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:09,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:09,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:17:09,379 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:09,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:09,380 INFO L85 PathProgramCache]: Analyzing trace with hash -326832520, now seen corresponding path program 4 times [2024-06-27 20:17:09,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:09,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014702522] [2024-06-27 20:17:09,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:09,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:09,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:10,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:10,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:10,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014702522] [2024-06-27 20:17:10,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014702522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:10,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:10,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:10,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684507881] [2024-06-27 20:17:10,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:10,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:10,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:10,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:10,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:10,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:10,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 102 transitions, 868 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:10,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:10,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:10,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:11,235 INFO L124 PetriNetUnfolderBase]: 1930/3021 cut-off events. [2024-06-27 20:17:11,236 INFO L125 PetriNetUnfolderBase]: For 61778/61781 co-relation queries the response was YES. [2024-06-27 20:17:11,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16631 conditions, 3021 events. 1930/3021 cut-off events. For 61778/61781 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15583 event pairs, 719 based on Foata normal form. 2/3016 useless extension candidates. Maximal degree in co-relation 16592. Up to 2681 conditions per place. [2024-06-27 20:17:11,255 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 75 selfloop transitions, 49 changer transitions 0/130 dead transitions. [2024-06-27 20:17:11,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 130 transitions, 1309 flow [2024-06-27 20:17:11,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:11,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:11,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-27 20:17:11,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-27 20:17:11,256 INFO L175 Difference]: Start difference. First operand has 96 places, 102 transitions, 868 flow. Second operand 8 states and 164 transitions. [2024-06-27 20:17:11,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 130 transitions, 1309 flow [2024-06-27 20:17:11,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 130 transitions, 1212 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 20:17:11,291 INFO L231 Difference]: Finished difference. Result has 99 places, 105 transitions, 930 flow [2024-06-27 20:17:11,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=930, PETRI_PLACES=99, PETRI_TRANSITIONS=105} [2024-06-27 20:17:11,291 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 54 predicate places. [2024-06-27 20:17:11,292 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 105 transitions, 930 flow [2024-06-27 20:17:11,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:11,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:11,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:11,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:17:11,292 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:11,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:11,293 INFO L85 PathProgramCache]: Analyzing trace with hash 26133267, now seen corresponding path program 3 times [2024-06-27 20:17:11,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:11,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649548903] [2024-06-27 20:17:11,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:11,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:11,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:12,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:12,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:12,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649548903] [2024-06-27 20:17:12,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649548903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:12,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:12,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:12,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122471692] [2024-06-27 20:17:12,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:12,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:12,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:12,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:12,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:12,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:12,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 105 transitions, 930 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:12,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:12,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:12,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:12,939 INFO L124 PetriNetUnfolderBase]: 1952/3056 cut-off events. [2024-06-27 20:17:12,939 INFO L125 PetriNetUnfolderBase]: For 67294/67300 co-relation queries the response was YES. [2024-06-27 20:17:12,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16950 conditions, 3056 events. 1952/3056 cut-off events. For 67294/67300 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15729 event pairs, 671 based on Foata normal form. 8/3059 useless extension candidates. Maximal degree in co-relation 16910. Up to 2706 conditions per place. [2024-06-27 20:17:12,959 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 92 selfloop transitions, 38 changer transitions 0/136 dead transitions. [2024-06-27 20:17:12,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 136 transitions, 1373 flow [2024-06-27 20:17:12,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:12,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:12,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-27 20:17:12,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744318181818182 [2024-06-27 20:17:12,961 INFO L175 Difference]: Start difference. First operand has 99 places, 105 transitions, 930 flow. Second operand 8 states and 167 transitions. [2024-06-27 20:17:12,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 136 transitions, 1373 flow [2024-06-27 20:17:13,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 136 transitions, 1260 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 20:17:13,039 INFO L231 Difference]: Finished difference. Result has 102 places, 108 transitions, 934 flow [2024-06-27 20:17:13,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=934, PETRI_PLACES=102, PETRI_TRANSITIONS=108} [2024-06-27 20:17:13,039 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 57 predicate places. [2024-06-27 20:17:13,039 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 108 transitions, 934 flow [2024-06-27 20:17:13,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:13,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:13,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:13,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:17:13,040 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:13,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:13,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1745660468, now seen corresponding path program 5 times [2024-06-27 20:17:13,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:13,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126040905] [2024-06-27 20:17:13,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:13,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:13,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:13,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:13,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126040905] [2024-06-27 20:17:13,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126040905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:13,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:13,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:13,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447628989] [2024-06-27 20:17:13,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:13,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:13,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:13,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:13,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:14,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:14,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 108 transitions, 934 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:14,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:14,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:14,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:14,677 INFO L124 PetriNetUnfolderBase]: 1963/3074 cut-off events. [2024-06-27 20:17:14,678 INFO L125 PetriNetUnfolderBase]: For 72411/72414 co-relation queries the response was YES. [2024-06-27 20:17:14,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17281 conditions, 3074 events. 1963/3074 cut-off events. For 72411/72414 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15860 event pairs, 719 based on Foata normal form. 2/3069 useless extension candidates. Maximal degree in co-relation 17240. Up to 2725 conditions per place. [2024-06-27 20:17:14,694 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 80 selfloop transitions, 50 changer transitions 0/136 dead transitions. [2024-06-27 20:17:14,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 136 transitions, 1392 flow [2024-06-27 20:17:14,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:14,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:14,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-27 20:17:14,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-27 20:17:14,696 INFO L175 Difference]: Start difference. First operand has 102 places, 108 transitions, 934 flow. Second operand 8 states and 165 transitions. [2024-06-27 20:17:14,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 136 transitions, 1392 flow [2024-06-27 20:17:14,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 136 transitions, 1294 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 20:17:14,766 INFO L231 Difference]: Finished difference. Result has 104 places, 111 transitions, 994 flow [2024-06-27 20:17:14,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=836, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=994, PETRI_PLACES=104, PETRI_TRANSITIONS=111} [2024-06-27 20:17:14,767 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 59 predicate places. [2024-06-27 20:17:14,767 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 111 transitions, 994 flow [2024-06-27 20:17:14,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:14,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:14,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:14,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:17:14,767 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:14,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:14,768 INFO L85 PathProgramCache]: Analyzing trace with hash -2100099556, now seen corresponding path program 6 times [2024-06-27 20:17:14,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:14,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032807209] [2024-06-27 20:17:14,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:14,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:14,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:15,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:15,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:15,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032807209] [2024-06-27 20:17:15,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032807209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:15,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:15,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:15,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251339109] [2024-06-27 20:17:15,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:15,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:15,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:15,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:15,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:15,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:15,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 111 transitions, 994 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:15,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:15,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:15,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:16,251 INFO L124 PetriNetUnfolderBase]: 1958/3067 cut-off events. [2024-06-27 20:17:16,251 INFO L125 PetriNetUnfolderBase]: For 77190/77193 co-relation queries the response was YES. [2024-06-27 20:17:16,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17425 conditions, 3067 events. 1958/3067 cut-off events. For 77190/77193 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15810 event pairs, 719 based on Foata normal form. 2/3062 useless extension candidates. Maximal degree in co-relation 17383. Up to 2720 conditions per place. [2024-06-27 20:17:16,269 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 79 selfloop transitions, 49 changer transitions 0/134 dead transitions. [2024-06-27 20:17:16,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 134 transitions, 1308 flow [2024-06-27 20:17:16,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:16,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:16,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-27 20:17:16,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-27 20:17:16,271 INFO L175 Difference]: Start difference. First operand has 104 places, 111 transitions, 994 flow. Second operand 8 states and 164 transitions. [2024-06-27 20:17:16,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 134 transitions, 1308 flow [2024-06-27 20:17:16,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 134 transitions, 1112 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-27 20:17:16,317 INFO L231 Difference]: Finished difference. Result has 105 places, 111 transitions, 904 flow [2024-06-27 20:17:16,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=798, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=904, PETRI_PLACES=105, PETRI_TRANSITIONS=111} [2024-06-27 20:17:16,317 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 60 predicate places. [2024-06-27 20:17:16,317 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 111 transitions, 904 flow [2024-06-27 20:17:16,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:16,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:16,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:16,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:17:16,318 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:16,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:16,318 INFO L85 PathProgramCache]: Analyzing trace with hash -326832303, now seen corresponding path program 4 times [2024-06-27 20:17:16,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:16,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969261079] [2024-06-27 20:17:16,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:16,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:16,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:17,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:17,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:17,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969261079] [2024-06-27 20:17:17,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969261079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:17,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:17,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:17,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740636457] [2024-06-27 20:17:17,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:17,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:17,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:17,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:17,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:17,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:17,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 111 transitions, 904 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:17,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:17,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:17,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:17,972 INFO L124 PetriNetUnfolderBase]: 1948/3056 cut-off events. [2024-06-27 20:17:17,973 INFO L125 PetriNetUnfolderBase]: For 81578/81584 co-relation queries the response was YES. [2024-06-27 20:17:17,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17425 conditions, 3056 events. 1948/3056 cut-off events. For 81578/81584 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15760 event pairs, 669 based on Foata normal form. 8/3059 useless extension candidates. Maximal degree in co-relation 17382. Up to 2707 conditions per place. [2024-06-27 20:17:17,992 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 92 selfloop transitions, 39 changer transitions 0/137 dead transitions. [2024-06-27 20:17:17,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 137 transitions, 1230 flow [2024-06-27 20:17:17,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:17,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:17,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-27 20:17:17,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-27 20:17:17,993 INFO L175 Difference]: Start difference. First operand has 105 places, 111 transitions, 904 flow. Second operand 8 states and 164 transitions. [2024-06-27 20:17:17,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 137 transitions, 1230 flow [2024-06-27 20:17:18,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 137 transitions, 1078 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 20:17:18,044 INFO L231 Difference]: Finished difference. Result has 105 places, 111 transitions, 838 flow [2024-06-27 20:17:18,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=752, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=838, PETRI_PLACES=105, PETRI_TRANSITIONS=111} [2024-06-27 20:17:18,045 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 60 predicate places. [2024-06-27 20:17:18,045 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 111 transitions, 838 flow [2024-06-27 20:17:18,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:18,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:18,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:18,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:17:18,046 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:18,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:18,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1222608917, now seen corresponding path program 1 times [2024-06-27 20:17:18,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:18,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115250988] [2024-06-27 20:17:18,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:18,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:18,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:18,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:18,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:18,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115250988] [2024-06-27 20:17:18,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115250988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:18,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:18,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:17:18,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897882834] [2024-06-27 20:17:18,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:18,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:17:18,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:18,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:17:18,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:17:18,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-27 20:17:18,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 111 transitions, 838 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:18,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:18,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-27 20:17:18,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:19,200 INFO L124 PetriNetUnfolderBase]: 1678/2795 cut-off events. [2024-06-27 20:17:19,200 INFO L125 PetriNetUnfolderBase]: For 84369/84369 co-relation queries the response was YES. [2024-06-27 20:17:19,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16172 conditions, 2795 events. 1678/2795 cut-off events. For 84369/84369 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 15572 event pairs, 666 based on Foata normal form. 1/2793 useless extension candidates. Maximal degree in co-relation 16128. Up to 2442 conditions per place. [2024-06-27 20:17:19,220 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 84 selfloop transitions, 11 changer transitions 0/123 dead transitions. [2024-06-27 20:17:19,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 123 transitions, 1074 flow [2024-06-27 20:17:19,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:17:19,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:17:19,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-27 20:17:19,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-27 20:17:19,222 INFO L175 Difference]: Start difference. First operand has 105 places, 111 transitions, 838 flow. Second operand 6 states and 123 transitions. [2024-06-27 20:17:19,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 123 transitions, 1074 flow [2024-06-27 20:17:19,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 123 transitions, 970 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 20:17:19,276 INFO L231 Difference]: Finished difference. Result has 103 places, 114 transitions, 792 flow [2024-06-27 20:17:19,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=792, PETRI_PLACES=103, PETRI_TRANSITIONS=114} [2024-06-27 20:17:19,276 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 58 predicate places. [2024-06-27 20:17:19,276 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 114 transitions, 792 flow [2024-06-27 20:17:19,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:19,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:19,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:19,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:17:19,277 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:19,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:19,277 INFO L85 PathProgramCache]: Analyzing trace with hash 637040847, now seen corresponding path program 1 times [2024-06-27 20:17:19,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:19,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506323475] [2024-06-27 20:17:19,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:19,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:19,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:20,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:20,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:20,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506323475] [2024-06-27 20:17:20,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506323475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:20,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:20,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:20,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455760478] [2024-06-27 20:17:20,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:20,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:20,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:20,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:20,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:20,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:17:20,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 114 transitions, 792 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:20,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:20,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:17:20,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:20,751 INFO L124 PetriNetUnfolderBase]: 1952/3094 cut-off events. [2024-06-27 20:17:20,751 INFO L125 PetriNetUnfolderBase]: For 107519/107519 co-relation queries the response was YES. [2024-06-27 20:17:20,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19076 conditions, 3094 events. 1952/3094 cut-off events. For 107519/107519 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16441 event pairs, 501 based on Foata normal form. 4/3095 useless extension candidates. Maximal degree in co-relation 19031. Up to 2710 conditions per place. [2024-06-27 20:17:20,772 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 117 selfloop transitions, 20 changer transitions 0/155 dead transitions. [2024-06-27 20:17:20,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 155 transitions, 1334 flow [2024-06-27 20:17:20,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:17:20,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:17:20,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-27 20:17:20,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823232323232323 [2024-06-27 20:17:20,773 INFO L175 Difference]: Start difference. First operand has 103 places, 114 transitions, 792 flow. Second operand 9 states and 191 transitions. [2024-06-27 20:17:20,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 155 transitions, 1334 flow [2024-06-27 20:17:20,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 155 transitions, 1298 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 20:17:20,834 INFO L231 Difference]: Finished difference. Result has 108 places, 118 transitions, 883 flow [2024-06-27 20:17:20,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=883, PETRI_PLACES=108, PETRI_TRANSITIONS=118} [2024-06-27 20:17:20,835 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 63 predicate places. [2024-06-27 20:17:20,835 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 118 transitions, 883 flow [2024-06-27 20:17:20,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:20,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:20,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:20,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:17:20,835 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:20,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:20,836 INFO L85 PathProgramCache]: Analyzing trace with hash -309941545, now seen corresponding path program 2 times [2024-06-27 20:17:20,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:20,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633686752] [2024-06-27 20:17:20,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:20,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:20,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:21,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:21,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:21,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633686752] [2024-06-27 20:17:21,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633686752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:21,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:21,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:21,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872845814] [2024-06-27 20:17:21,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:21,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:21,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:21,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:21,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:21,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:17:21,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 118 transitions, 883 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:21,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:21,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:17:21,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:22,309 INFO L124 PetriNetUnfolderBase]: 1944/3082 cut-off events. [2024-06-27 20:17:22,309 INFO L125 PetriNetUnfolderBase]: For 114726/114726 co-relation queries the response was YES. [2024-06-27 20:17:22,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19428 conditions, 3082 events. 1944/3082 cut-off events. For 114726/114726 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16378 event pairs, 659 based on Foata normal form. 4/3083 useless extension candidates. Maximal degree in co-relation 19382. Up to 2757 conditions per place. [2024-06-27 20:17:22,329 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 114 selfloop transitions, 16 changer transitions 0/148 dead transitions. [2024-06-27 20:17:22,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 148 transitions, 1219 flow [2024-06-27 20:17:22,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:22,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:22,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-27 20:17:22,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48011363636363635 [2024-06-27 20:17:22,331 INFO L175 Difference]: Start difference. First operand has 108 places, 118 transitions, 883 flow. Second operand 8 states and 169 transitions. [2024-06-27 20:17:22,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 148 transitions, 1219 flow [2024-06-27 20:17:22,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 148 transitions, 1135 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-27 20:17:22,394 INFO L231 Difference]: Finished difference. Result has 111 places, 118 transitions, 838 flow [2024-06-27 20:17:22,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=799, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=838, PETRI_PLACES=111, PETRI_TRANSITIONS=118} [2024-06-27 20:17:22,395 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 66 predicate places. [2024-06-27 20:17:22,395 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 118 transitions, 838 flow [2024-06-27 20:17:22,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:22,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:22,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:22,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:17:22,396 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:22,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:22,396 INFO L85 PathProgramCache]: Analyzing trace with hash -2000029521, now seen corresponding path program 1 times [2024-06-27 20:17:22,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:22,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844281722] [2024-06-27 20:17:22,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:22,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:22,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:23,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:23,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:23,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844281722] [2024-06-27 20:17:23,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844281722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:23,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:23,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:23,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143229245] [2024-06-27 20:17:23,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:23,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:23,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:23,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:23,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:23,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:23,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 118 transitions, 838 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:23,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:23,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:23,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:24,025 INFO L124 PetriNetUnfolderBase]: 2072/3223 cut-off events. [2024-06-27 20:17:24,026 INFO L125 PetriNetUnfolderBase]: For 124154/124154 co-relation queries the response was YES. [2024-06-27 20:17:24,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20378 conditions, 3223 events. 2072/3223 cut-off events. For 124154/124154 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 16716 event pairs, 683 based on Foata normal form. 4/3221 useless extension candidates. Maximal degree in co-relation 20330. Up to 2968 conditions per place. [2024-06-27 20:17:24,048 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 128 selfloop transitions, 20 changer transitions 0/155 dead transitions. [2024-06-27 20:17:24,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 155 transitions, 1268 flow [2024-06-27 20:17:24,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:17:24,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:17:24,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-27 20:17:24,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45707070707070707 [2024-06-27 20:17:24,050 INFO L175 Difference]: Start difference. First operand has 111 places, 118 transitions, 838 flow. Second operand 9 states and 181 transitions. [2024-06-27 20:17:24,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 155 transitions, 1268 flow [2024-06-27 20:17:24,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 155 transitions, 1231 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 20:17:24,100 INFO L231 Difference]: Finished difference. Result has 113 places, 121 transitions, 903 flow [2024-06-27 20:17:24,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=903, PETRI_PLACES=113, PETRI_TRANSITIONS=121} [2024-06-27 20:17:24,101 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 68 predicate places. [2024-06-27 20:17:24,101 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 121 transitions, 903 flow [2024-06-27 20:17:24,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:24,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:24,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:24,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:17:24,101 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:24,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:24,102 INFO L85 PathProgramCache]: Analyzing trace with hash -194650375, now seen corresponding path program 3 times [2024-06-27 20:17:24,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:24,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869581287] [2024-06-27 20:17:24,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:24,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:24,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:24,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:24,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:24,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869581287] [2024-06-27 20:17:24,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869581287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:24,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:24,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:24,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241731338] [2024-06-27 20:17:24,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:24,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:24,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:24,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:24,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:25,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:17:25,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 121 transitions, 903 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:25,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:25,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:17:25,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:25,744 INFO L124 PetriNetUnfolderBase]: 1980/3142 cut-off events. [2024-06-27 20:17:25,744 INFO L125 PetriNetUnfolderBase]: For 132684/132687 co-relation queries the response was YES. [2024-06-27 20:17:25,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20578 conditions, 3142 events. 1980/3142 cut-off events. For 132684/132687 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16673 event pairs, 642 based on Foata normal form. 6/3144 useless extension candidates. Maximal degree in co-relation 20529. Up to 2768 conditions per place. [2024-06-27 20:17:25,766 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 104 selfloop transitions, 28 changer transitions 0/150 dead transitions. [2024-06-27 20:17:25,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 150 transitions, 1279 flow [2024-06-27 20:17:25,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:25,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:25,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-27 20:17:25,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48295454545454547 [2024-06-27 20:17:25,787 INFO L175 Difference]: Start difference. First operand has 113 places, 121 transitions, 903 flow. Second operand 8 states and 170 transitions. [2024-06-27 20:17:25,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 150 transitions, 1279 flow [2024-06-27 20:17:25,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 150 transitions, 1201 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 20:17:25,853 INFO L231 Difference]: Finished difference. Result has 114 places, 123 transitions, 936 flow [2024-06-27 20:17:25,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=936, PETRI_PLACES=114, PETRI_TRANSITIONS=123} [2024-06-27 20:17:25,853 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 69 predicate places. [2024-06-27 20:17:25,853 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 123 transitions, 936 flow [2024-06-27 20:17:25,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:25,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:25,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:25,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 20:17:25,854 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:25,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:25,854 INFO L85 PathProgramCache]: Analyzing trace with hash -869784585, now seen corresponding path program 2 times [2024-06-27 20:17:25,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:25,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844681148] [2024-06-27 20:17:25,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:25,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:25,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:26,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:26,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:26,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844681148] [2024-06-27 20:17:26,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844681148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:26,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:26,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:26,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932144837] [2024-06-27 20:17:26,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:26,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:26,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:26,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:26,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:26,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:26,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 123 transitions, 936 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:26,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:26,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:26,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:27,682 INFO L124 PetriNetUnfolderBase]: 2175/3399 cut-off events. [2024-06-27 20:17:27,683 INFO L125 PetriNetUnfolderBase]: For 148515/148518 co-relation queries the response was YES. [2024-06-27 20:17:27,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22615 conditions, 3399 events. 2175/3399 cut-off events. For 148515/148518 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 17935 event pairs, 632 based on Foata normal form. 4/3399 useless extension candidates. Maximal degree in co-relation 22565. Up to 2763 conditions per place. [2024-06-27 20:17:27,708 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 101 selfloop transitions, 68 changer transitions 0/176 dead transitions. [2024-06-27 20:17:27,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 176 transitions, 1944 flow [2024-06-27 20:17:27,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:17:27,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:17:27,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-27 20:17:27,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5025252525252525 [2024-06-27 20:17:27,715 INFO L175 Difference]: Start difference. First operand has 114 places, 123 transitions, 936 flow. Second operand 9 states and 199 transitions. [2024-06-27 20:17:27,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 176 transitions, 1944 flow [2024-06-27 20:17:27,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 176 transitions, 1851 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 20:17:27,782 INFO L231 Difference]: Finished difference. Result has 117 places, 135 transitions, 1217 flow [2024-06-27 20:17:27,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=843, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1217, PETRI_PLACES=117, PETRI_TRANSITIONS=135} [2024-06-27 20:17:27,783 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 72 predicate places. [2024-06-27 20:17:27,783 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 135 transitions, 1217 flow [2024-06-27 20:17:27,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:27,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:27,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:27,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 20:17:27,784 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:27,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:27,785 INFO L85 PathProgramCache]: Analyzing trace with hash -869778075, now seen corresponding path program 3 times [2024-06-27 20:17:27,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:27,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856680163] [2024-06-27 20:17:27,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:27,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:27,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:28,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:28,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:28,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856680163] [2024-06-27 20:17:28,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856680163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:28,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:28,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:28,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695282311] [2024-06-27 20:17:28,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:28,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:28,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:28,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:28,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:28,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:28,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 135 transitions, 1217 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:28,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:28,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:28,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:29,576 INFO L124 PetriNetUnfolderBase]: 2165/3390 cut-off events. [2024-06-27 20:17:29,577 INFO L125 PetriNetUnfolderBase]: For 157200/157203 co-relation queries the response was YES. [2024-06-27 20:17:29,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23121 conditions, 3390 events. 2165/3390 cut-off events. For 157200/157203 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 17876 event pairs, 637 based on Foata normal form. 4/3390 useless extension candidates. Maximal degree in co-relation 23070. Up to 2755 conditions per place. [2024-06-27 20:17:29,602 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 96 selfloop transitions, 70 changer transitions 0/173 dead transitions. [2024-06-27 20:17:29,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 173 transitions, 1881 flow [2024-06-27 20:17:29,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:17:29,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:17:29,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-27 20:17:29,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49242424242424243 [2024-06-27 20:17:29,604 INFO L175 Difference]: Start difference. First operand has 117 places, 135 transitions, 1217 flow. Second operand 9 states and 195 transitions. [2024-06-27 20:17:29,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 173 transitions, 1881 flow [2024-06-27 20:17:29,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 173 transitions, 1755 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-27 20:17:29,672 INFO L231 Difference]: Finished difference. Result has 123 places, 135 transitions, 1239 flow [2024-06-27 20:17:29,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1091, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1239, PETRI_PLACES=123, PETRI_TRANSITIONS=135} [2024-06-27 20:17:29,672 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 78 predicate places. [2024-06-27 20:17:29,672 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 135 transitions, 1239 flow [2024-06-27 20:17:29,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:29,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:29,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:29,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 20:17:29,673 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:29,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:29,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1884738351, now seen corresponding path program 4 times [2024-06-27 20:17:29,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:29,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957875577] [2024-06-27 20:17:29,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:29,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:29,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:30,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:30,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:30,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957875577] [2024-06-27 20:17:30,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957875577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:30,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:30,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:30,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559576050] [2024-06-27 20:17:30,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:30,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:30,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:30,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:30,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:30,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:30,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 135 transitions, 1239 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:30,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:30,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:30,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:31,585 INFO L124 PetriNetUnfolderBase]: 2155/3376 cut-off events. [2024-06-27 20:17:31,585 INFO L125 PetriNetUnfolderBase]: For 163130/163133 co-relation queries the response was YES. [2024-06-27 20:17:31,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23233 conditions, 3376 events. 2155/3376 cut-off events. For 163130/163133 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 17830 event pairs, 635 based on Foata normal form. 4/3376 useless extension candidates. Maximal degree in co-relation 23180. Up to 2747 conditions per place. [2024-06-27 20:17:31,609 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 98 selfloop transitions, 67 changer transitions 0/172 dead transitions. [2024-06-27 20:17:31,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 172 transitions, 1783 flow [2024-06-27 20:17:31,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:17:31,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:17:31,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-27 20:17:31,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.494949494949495 [2024-06-27 20:17:31,611 INFO L175 Difference]: Start difference. First operand has 123 places, 135 transitions, 1239 flow. Second operand 9 states and 196 transitions. [2024-06-27 20:17:31,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 172 transitions, 1783 flow [2024-06-27 20:17:31,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 172 transitions, 1619 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-27 20:17:31,676 INFO L231 Difference]: Finished difference. Result has 125 places, 135 transitions, 1217 flow [2024-06-27 20:17:31,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1075, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1217, PETRI_PLACES=125, PETRI_TRANSITIONS=135} [2024-06-27 20:17:31,676 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 80 predicate places. [2024-06-27 20:17:31,677 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 135 transitions, 1217 flow [2024-06-27 20:17:31,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:31,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:31,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:31,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 20:17:31,677 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:31,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:31,678 INFO L85 PathProgramCache]: Analyzing trace with hash 740482556, now seen corresponding path program 1 times [2024-06-27 20:17:31,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:31,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357119096] [2024-06-27 20:17:31,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:31,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:31,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:32,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:32,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:32,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357119096] [2024-06-27 20:17:32,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357119096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:32,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:32,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:17:32,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310875188] [2024-06-27 20:17:32,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:32,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:17:32,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:32,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:17:32,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:17:32,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-27 20:17:32,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 135 transitions, 1217 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:32,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:32,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-27 20:17:32,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:32,973 INFO L124 PetriNetUnfolderBase]: 1901/3114 cut-off events. [2024-06-27 20:17:32,974 INFO L125 PetriNetUnfolderBase]: For 170314/170322 co-relation queries the response was YES. [2024-06-27 20:17:32,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22280 conditions, 3114 events. 1901/3114 cut-off events. For 170314/170322 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 17402 event pairs, 641 based on Foata normal form. 2/3096 useless extension candidates. Maximal degree in co-relation 22226. Up to 2711 conditions per place. [2024-06-27 20:17:32,999 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 111 selfloop transitions, 13 changer transitions 0/153 dead transitions. [2024-06-27 20:17:32,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 153 transitions, 1535 flow [2024-06-27 20:17:33,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:17:33,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:17:33,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-27 20:17:33,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48863636363636365 [2024-06-27 20:17:33,001 INFO L175 Difference]: Start difference. First operand has 125 places, 135 transitions, 1217 flow. Second operand 6 states and 129 transitions. [2024-06-27 20:17:33,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 153 transitions, 1535 flow [2024-06-27 20:17:33,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 153 transitions, 1361 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-27 20:17:33,071 INFO L231 Difference]: Finished difference. Result has 122 places, 138 transitions, 1114 flow [2024-06-27 20:17:33,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1043, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1114, PETRI_PLACES=122, PETRI_TRANSITIONS=138} [2024-06-27 20:17:33,071 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 77 predicate places. [2024-06-27 20:17:33,072 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 138 transitions, 1114 flow [2024-06-27 20:17:33,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:33,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:33,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:33,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 20:17:33,072 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:33,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:33,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1769951495, now seen corresponding path program 4 times [2024-06-27 20:17:33,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:33,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342481500] [2024-06-27 20:17:33,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:33,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:33,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:33,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:33,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:33,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342481500] [2024-06-27 20:17:33,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342481500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:33,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:33,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:33,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286216740] [2024-06-27 20:17:33,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:33,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:33,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:33,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:33,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:34,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:17:34,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 138 transitions, 1114 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:34,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:34,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:17:34,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:34,781 INFO L124 PetriNetUnfolderBase]: 2069/3281 cut-off events. [2024-06-27 20:17:34,781 INFO L125 PetriNetUnfolderBase]: For 176623/176626 co-relation queries the response was YES. [2024-06-27 20:17:34,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23130 conditions, 3281 events. 2069/3281 cut-off events. For 176623/176626 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 17520 event pairs, 659 based on Foata normal form. 4/3278 useless extension candidates. Maximal degree in co-relation 23075. Up to 2881 conditions per place. [2024-06-27 20:17:34,805 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 118 selfloop transitions, 28 changer transitions 0/164 dead transitions. [2024-06-27 20:17:34,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 164 transitions, 1516 flow [2024-06-27 20:17:34,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:34,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:34,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-27 20:17:34,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744318181818182 [2024-06-27 20:17:34,807 INFO L175 Difference]: Start difference. First operand has 122 places, 138 transitions, 1114 flow. Second operand 8 states and 167 transitions. [2024-06-27 20:17:34,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 164 transitions, 1516 flow [2024-06-27 20:17:34,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 164 transitions, 1469 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 20:17:34,877 INFO L231 Difference]: Finished difference. Result has 126 places, 140 transitions, 1184 flow [2024-06-27 20:17:34,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1067, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1184, PETRI_PLACES=126, PETRI_TRANSITIONS=140} [2024-06-27 20:17:34,878 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 81 predicate places. [2024-06-27 20:17:34,878 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 140 transitions, 1184 flow [2024-06-27 20:17:34,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:34,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:34,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:34,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 20:17:34,879 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:34,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:34,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1769946535, now seen corresponding path program 5 times [2024-06-27 20:17:34,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:34,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864837572] [2024-06-27 20:17:34,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:34,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:34,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:35,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:35,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:35,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864837572] [2024-06-27 20:17:35,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864837572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:35,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:35,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:35,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951422306] [2024-06-27 20:17:35,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:35,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:35,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:35,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:35,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:35,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:35,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 140 transitions, 1184 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:35,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:35,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:35,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:36,713 INFO L124 PetriNetUnfolderBase]: 2205/3436 cut-off events. [2024-06-27 20:17:36,714 INFO L125 PetriNetUnfolderBase]: For 188907/188910 co-relation queries the response was YES. [2024-06-27 20:17:36,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24443 conditions, 3436 events. 2205/3436 cut-off events. For 188907/188910 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 17999 event pairs, 632 based on Foata normal form. 4/3433 useless extension candidates. Maximal degree in co-relation 24387. Up to 2794 conditions per place. [2024-06-27 20:17:36,739 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 96 selfloop transitions, 73 changer transitions 0/176 dead transitions. [2024-06-27 20:17:36,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 176 transitions, 1798 flow [2024-06-27 20:17:36,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:17:36,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:17:36,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-27 20:17:36,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797979797979798 [2024-06-27 20:17:36,746 INFO L175 Difference]: Start difference. First operand has 126 places, 140 transitions, 1184 flow. Second operand 9 states and 190 transitions. [2024-06-27 20:17:36,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 176 transitions, 1798 flow [2024-06-27 20:17:36,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 176 transitions, 1699 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 20:17:36,819 INFO L231 Difference]: Finished difference. Result has 129 places, 143 transitions, 1301 flow [2024-06-27 20:17:36,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1085, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1301, PETRI_PLACES=129, PETRI_TRANSITIONS=143} [2024-06-27 20:17:36,819 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 84 predicate places. [2024-06-27 20:17:36,819 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 143 transitions, 1301 flow [2024-06-27 20:17:36,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:36,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:36,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:36,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 20:17:36,820 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:36,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:36,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1769773555, now seen corresponding path program 6 times [2024-06-27 20:17:36,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:36,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489629302] [2024-06-27 20:17:36,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:36,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:36,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:37,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:37,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:37,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489629302] [2024-06-27 20:17:37,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489629302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:37,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:37,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:37,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805740724] [2024-06-27 20:17:37,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:37,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:37,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:37,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:37,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:37,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:37,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 143 transitions, 1301 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:37,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:37,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:37,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:38,603 INFO L124 PetriNetUnfolderBase]: 2259/3534 cut-off events. [2024-06-27 20:17:38,603 INFO L125 PetriNetUnfolderBase]: For 202867/202870 co-relation queries the response was YES. [2024-06-27 20:17:38,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25611 conditions, 3534 events. 2259/3534 cut-off events. For 202867/202870 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 18727 event pairs, 637 based on Foata normal form. 4/3531 useless extension candidates. Maximal degree in co-relation 25554. Up to 2840 conditions per place. [2024-06-27 20:17:38,632 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 102 selfloop transitions, 76 changer transitions 0/185 dead transitions. [2024-06-27 20:17:38,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 185 transitions, 2155 flow [2024-06-27 20:17:38,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:17:38,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:17:38,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-27 20:17:38,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49242424242424243 [2024-06-27 20:17:38,633 INFO L175 Difference]: Start difference. First operand has 129 places, 143 transitions, 1301 flow. Second operand 9 states and 195 transitions. [2024-06-27 20:17:38,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 185 transitions, 2155 flow [2024-06-27 20:17:38,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 185 transitions, 1905 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-27 20:17:38,705 INFO L231 Difference]: Finished difference. Result has 131 places, 149 transitions, 1347 flow [2024-06-27 20:17:38,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1083, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1347, PETRI_PLACES=131, PETRI_TRANSITIONS=149} [2024-06-27 20:17:38,706 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 86 predicate places. [2024-06-27 20:17:38,706 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 149 transitions, 1347 flow [2024-06-27 20:17:38,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:38,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:38,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:38,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 20:17:38,706 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:38,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:38,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1541865895, now seen corresponding path program 7 times [2024-06-27 20:17:38,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:38,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563526976] [2024-06-27 20:17:38,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:38,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:38,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:39,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:39,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:39,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563526976] [2024-06-27 20:17:39,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563526976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:39,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:39,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:39,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965086782] [2024-06-27 20:17:39,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:39,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:39,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:39,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:39,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:39,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:39,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 149 transitions, 1347 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:39,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:39,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:39,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:40,609 INFO L124 PetriNetUnfolderBase]: 2313/3627 cut-off events. [2024-06-27 20:17:40,610 INFO L125 PetriNetUnfolderBase]: For 215182/215185 co-relation queries the response was YES. [2024-06-27 20:17:40,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26390 conditions, 3627 events. 2313/3627 cut-off events. For 215182/215185 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 19312 event pairs, 639 based on Foata normal form. 4/3624 useless extension candidates. Maximal degree in co-relation 26332. Up to 2886 conditions per place. [2024-06-27 20:17:40,635 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 100 selfloop transitions, 85 changer transitions 0/192 dead transitions. [2024-06-27 20:17:40,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 192 transitions, 2347 flow [2024-06-27 20:17:40,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:17:40,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:17:40,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-27 20:17:40,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4898989898989899 [2024-06-27 20:17:40,638 INFO L175 Difference]: Start difference. First operand has 131 places, 149 transitions, 1347 flow. Second operand 9 states and 194 transitions. [2024-06-27 20:17:40,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 192 transitions, 2347 flow [2024-06-27 20:17:40,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 192 transitions, 2175 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 20:17:40,722 INFO L231 Difference]: Finished difference. Result has 135 places, 155 transitions, 1469 flow [2024-06-27 20:17:40,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1181, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1469, PETRI_PLACES=135, PETRI_TRANSITIONS=155} [2024-06-27 20:17:40,723 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 90 predicate places. [2024-06-27 20:17:40,723 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 155 transitions, 1469 flow [2024-06-27 20:17:40,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:40,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:40,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:40,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 20:17:40,724 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:40,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:40,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1769767045, now seen corresponding path program 8 times [2024-06-27 20:17:40,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:40,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110142166] [2024-06-27 20:17:40,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:40,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:40,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:41,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:41,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110142166] [2024-06-27 20:17:41,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110142166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:41,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:41,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:41,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843628123] [2024-06-27 20:17:41,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:41,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:41,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:41,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:41,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:41,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:41,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 155 transitions, 1469 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:41,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:41,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:41,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:42,505 INFO L124 PetriNetUnfolderBase]: 2303/3613 cut-off events. [2024-06-27 20:17:42,505 INFO L125 PetriNetUnfolderBase]: For 223167/223170 co-relation queries the response was YES. [2024-06-27 20:17:42,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26378 conditions, 3613 events. 2303/3613 cut-off events. For 223167/223170 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 19285 event pairs, 637 based on Foata normal form. 4/3610 useless extension candidates. Maximal degree in co-relation 26319. Up to 2878 conditions per place. [2024-06-27 20:17:42,531 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 98 selfloop transitions, 83 changer transitions 0/188 dead transitions. [2024-06-27 20:17:42,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 188 transitions, 2057 flow [2024-06-27 20:17:42,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:17:42,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:17:42,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-27 20:17:42,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823232323232323 [2024-06-27 20:17:42,533 INFO L175 Difference]: Start difference. First operand has 135 places, 155 transitions, 1469 flow. Second operand 9 states and 191 transitions. [2024-06-27 20:17:42,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 188 transitions, 2057 flow [2024-06-27 20:17:42,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 188 transitions, 1803 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-27 20:17:42,633 INFO L231 Difference]: Finished difference. Result has 138 places, 155 transitions, 1389 flow [2024-06-27 20:17:42,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1215, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1389, PETRI_PLACES=138, PETRI_TRANSITIONS=155} [2024-06-27 20:17:42,635 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 93 predicate places. [2024-06-27 20:17:42,635 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 155 transitions, 1389 flow [2024-06-27 20:17:42,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:42,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:42,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:42,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 20:17:42,636 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:42,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:42,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1541872405, now seen corresponding path program 9 times [2024-06-27 20:17:42,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:42,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790567968] [2024-06-27 20:17:42,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:42,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:42,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:43,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:43,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:43,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790567968] [2024-06-27 20:17:43,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790567968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:43,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:43,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:43,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13816551] [2024-06-27 20:17:43,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:43,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:43,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:43,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:43,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:43,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:43,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 155 transitions, 1389 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:43,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:43,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:43,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:44,501 INFO L124 PetriNetUnfolderBase]: 2293/3599 cut-off events. [2024-06-27 20:17:44,502 INFO L125 PetriNetUnfolderBase]: For 229381/229384 co-relation queries the response was YES. [2024-06-27 20:17:44,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26184 conditions, 3599 events. 2293/3599 cut-off events. For 229381/229384 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 19200 event pairs, 635 based on Foata normal form. 4/3596 useless extension candidates. Maximal degree in co-relation 26124. Up to 2870 conditions per place. [2024-06-27 20:17:44,532 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 95 selfloop transitions, 86 changer transitions 0/188 dead transitions. [2024-06-27 20:17:44,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 188 transitions, 1981 flow [2024-06-27 20:17:44,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:17:44,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:17:44,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-27 20:17:44,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 20:17:44,533 INFO L175 Difference]: Start difference. First operand has 138 places, 155 transitions, 1389 flow. Second operand 9 states and 189 transitions. [2024-06-27 20:17:44,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 188 transitions, 1981 flow [2024-06-27 20:17:44,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 188 transitions, 1775 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-27 20:17:44,671 INFO L231 Difference]: Finished difference. Result has 139 places, 155 transitions, 1363 flow [2024-06-27 20:17:44,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1183, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1363, PETRI_PLACES=139, PETRI_TRANSITIONS=155} [2024-06-27 20:17:44,672 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 94 predicate places. [2024-06-27 20:17:44,672 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 155 transitions, 1363 flow [2024-06-27 20:17:44,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:44,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:44,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:44,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 20:17:44,672 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:44,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:44,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1533591685, now seen corresponding path program 10 times [2024-06-27 20:17:44,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:44,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235689320] [2024-06-27 20:17:44,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:44,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:44,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:45,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:45,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:45,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235689320] [2024-06-27 20:17:45,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235689320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:45,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:45,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:45,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242573148] [2024-06-27 20:17:45,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:45,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:45,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:45,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:45,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:45,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:45,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 155 transitions, 1363 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:45,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:45,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:45,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:46,446 INFO L124 PetriNetUnfolderBase]: 2283/3585 cut-off events. [2024-06-27 20:17:46,447 INFO L125 PetriNetUnfolderBase]: For 236622/236625 co-relation queries the response was YES. [2024-06-27 20:17:46,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26150 conditions, 3585 events. 2283/3585 cut-off events. For 236622/236625 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19136 event pairs, 640 based on Foata normal form. 4/3582 useless extension candidates. Maximal degree in co-relation 26089. Up to 2862 conditions per place. [2024-06-27 20:17:46,474 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 86 selfloop transitions, 92 changer transitions 0/185 dead transitions. [2024-06-27 20:17:46,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 185 transitions, 1793 flow [2024-06-27 20:17:46,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:17:46,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:17:46,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-27 20:17:46,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4671717171717172 [2024-06-27 20:17:46,475 INFO L175 Difference]: Start difference. First operand has 139 places, 155 transitions, 1363 flow. Second operand 9 states and 185 transitions. [2024-06-27 20:17:46,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 185 transitions, 1793 flow [2024-06-27 20:17:46,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 185 transitions, 1569 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-27 20:17:46,585 INFO L231 Difference]: Finished difference. Result has 140 places, 155 transitions, 1331 flow [2024-06-27 20:17:46,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1139, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1331, PETRI_PLACES=140, PETRI_TRANSITIONS=155} [2024-06-27 20:17:46,586 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 95 predicate places. [2024-06-27 20:17:46,586 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 155 transitions, 1331 flow [2024-06-27 20:17:46,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:46,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:46,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:46,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 20:17:46,586 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:46,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:46,587 INFO L85 PathProgramCache]: Analyzing trace with hash 753815036, now seen corresponding path program 2 times [2024-06-27 20:17:46,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:46,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558074791] [2024-06-27 20:17:46,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:46,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:46,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:47,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:47,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:47,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558074791] [2024-06-27 20:17:47,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558074791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:47,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:47,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:17:47,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743394319] [2024-06-27 20:17:47,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:47,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:17:47,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:47,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:17:47,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:17:47,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-27 20:17:47,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 155 transitions, 1331 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:47,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:47,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-27 20:17:47,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:47,854 INFO L124 PetriNetUnfolderBase]: 1948/3203 cut-off events. [2024-06-27 20:17:47,854 INFO L125 PetriNetUnfolderBase]: For 241130/241130 co-relation queries the response was YES. [2024-06-27 20:17:47,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24550 conditions, 3203 events. 1948/3203 cut-off events. For 241130/241130 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18142 event pairs, 644 based on Foata normal form. 1/3174 useless extension candidates. Maximal degree in co-relation 24488. Up to 2783 conditions per place. [2024-06-27 20:17:47,883 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 120 selfloop transitions, 18 changer transitions 0/167 dead transitions. [2024-06-27 20:17:47,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 167 transitions, 1667 flow [2024-06-27 20:17:47,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:17:47,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:17:47,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-27 20:17:47,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4734848484848485 [2024-06-27 20:17:47,884 INFO L175 Difference]: Start difference. First operand has 140 places, 155 transitions, 1331 flow. Second operand 6 states and 125 transitions. [2024-06-27 20:17:47,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 167 transitions, 1667 flow [2024-06-27 20:17:47,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 167 transitions, 1459 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 20:17:47,994 INFO L231 Difference]: Finished difference. Result has 137 places, 158 transitions, 1209 flow [2024-06-27 20:17:47,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1123, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1209, PETRI_PLACES=137, PETRI_TRANSITIONS=158} [2024-06-27 20:17:47,995 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 92 predicate places. [2024-06-27 20:17:47,995 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 158 transitions, 1209 flow [2024-06-27 20:17:47,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:47,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:47,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:47,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 20:17:47,995 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:47,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:47,996 INFO L85 PathProgramCache]: Analyzing trace with hash 2039531214, now seen corresponding path program 1 times [2024-06-27 20:17:47,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:47,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949397959] [2024-06-27 20:17:47,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:47,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:48,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:48,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:48,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:48,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949397959] [2024-06-27 20:17:48,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949397959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:48,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:48,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:17:48,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127365037] [2024-06-27 20:17:48,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:48,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:17:48,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:48,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:17:48,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:17:48,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-27 20:17:48,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 158 transitions, 1209 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:48,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:48,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-27 20:17:48,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:49,281 INFO L124 PetriNetUnfolderBase]: 1931/3211 cut-off events. [2024-06-27 20:17:49,282 INFO L125 PetriNetUnfolderBase]: For 218008/218008 co-relation queries the response was YES. [2024-06-27 20:17:49,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23110 conditions, 3211 events. 1931/3211 cut-off events. For 218008/218008 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 18118 event pairs, 564 based on Foata normal form. 1/3209 useless extension candidates. Maximal degree in co-relation 23047. Up to 2774 conditions per place. [2024-06-27 20:17:49,307 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 143 selfloop transitions, 11 changer transitions 0/173 dead transitions. [2024-06-27 20:17:49,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 173 transitions, 1585 flow [2024-06-27 20:17:49,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:17:49,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:17:49,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-27 20:17:49,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 20:17:49,308 INFO L175 Difference]: Start difference. First operand has 137 places, 158 transitions, 1209 flow. Second operand 6 states and 126 transitions. [2024-06-27 20:17:49,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 173 transitions, 1585 flow [2024-06-27 20:17:49,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 173 transitions, 1521 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 20:17:49,402 INFO L231 Difference]: Finished difference. Result has 139 places, 161 transitions, 1217 flow [2024-06-27 20:17:49,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1217, PETRI_PLACES=139, PETRI_TRANSITIONS=161} [2024-06-27 20:17:49,403 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 94 predicate places. [2024-06-27 20:17:49,403 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 161 transitions, 1217 flow [2024-06-27 20:17:49,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:49,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:49,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:49,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 20:17:49,404 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:49,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:49,404 INFO L85 PathProgramCache]: Analyzing trace with hash 753820988, now seen corresponding path program 2 times [2024-06-27 20:17:49,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:49,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581940359] [2024-06-27 20:17:49,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:49,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:49,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:50,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:50,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:50,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581940359] [2024-06-27 20:17:50,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581940359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:50,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:50,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:17:50,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415497672] [2024-06-27 20:17:50,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:50,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:17:50,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:50,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:17:50,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:17:50,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-27 20:17:50,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 161 transitions, 1217 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:50,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:50,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-27 20:17:50,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:50,693 INFO L124 PetriNetUnfolderBase]: 1928/3208 cut-off events. [2024-06-27 20:17:50,694 INFO L125 PetriNetUnfolderBase]: For 226230/226233 co-relation queries the response was YES. [2024-06-27 20:17:50,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23512 conditions, 3208 events. 1928/3208 cut-off events. For 226230/226233 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 18085 event pairs, 568 based on Foata normal form. 3/3207 useless extension candidates. Maximal degree in co-relation 23448. Up to 2764 conditions per place. [2024-06-27 20:17:50,719 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 138 selfloop transitions, 16 changer transitions 0/173 dead transitions. [2024-06-27 20:17:50,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 173 transitions, 1591 flow [2024-06-27 20:17:50,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:17:50,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:17:50,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-27 20:17:50,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4734848484848485 [2024-06-27 20:17:50,721 INFO L175 Difference]: Start difference. First operand has 139 places, 161 transitions, 1217 flow. Second operand 6 states and 125 transitions. [2024-06-27 20:17:50,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 173 transitions, 1591 flow [2024-06-27 20:17:50,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 173 transitions, 1541 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 20:17:50,806 INFO L231 Difference]: Finished difference. Result has 141 places, 164 transitions, 1255 flow [2024-06-27 20:17:50,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1167, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1255, PETRI_PLACES=141, PETRI_TRANSITIONS=164} [2024-06-27 20:17:50,806 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 96 predicate places. [2024-06-27 20:17:50,806 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 164 transitions, 1255 flow [2024-06-27 20:17:50,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:50,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:50,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:50,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 20:17:50,807 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:50,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:50,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1352694705, now seen corresponding path program 1 times [2024-06-27 20:17:50,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:50,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987017327] [2024-06-27 20:17:50,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:50,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:50,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:51,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:51,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:51,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987017327] [2024-06-27 20:17:51,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987017327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:51,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:51,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:51,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048066479] [2024-06-27 20:17:51,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:51,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:51,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:51,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:51,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:51,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:17:51,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 164 transitions, 1255 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:51,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:51,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:17:51,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:52,627 INFO L124 PetriNetUnfolderBase]: 2028/3301 cut-off events. [2024-06-27 20:17:52,628 INFO L125 PetriNetUnfolderBase]: For 235594/235594 co-relation queries the response was YES. [2024-06-27 20:17:52,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24303 conditions, 3301 events. 2028/3301 cut-off events. For 235594/235594 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18099 event pairs, 548 based on Foata normal form. 4/3302 useless extension candidates. Maximal degree in co-relation 24238. Up to 2912 conditions per place. [2024-06-27 20:17:52,654 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 170 selfloop transitions, 19 changer transitions 0/197 dead transitions. [2024-06-27 20:17:52,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 197 transitions, 1773 flow [2024-06-27 20:17:52,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:17:52,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:17:52,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-27 20:17:52,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595959595959596 [2024-06-27 20:17:52,659 INFO L175 Difference]: Start difference. First operand has 141 places, 164 transitions, 1255 flow. Second operand 9 states and 182 transitions. [2024-06-27 20:17:52,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 197 transitions, 1773 flow [2024-06-27 20:17:52,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 197 transitions, 1707 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 20:17:52,778 INFO L231 Difference]: Finished difference. Result has 147 places, 169 transitions, 1314 flow [2024-06-27 20:17:52,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1314, PETRI_PLACES=147, PETRI_TRANSITIONS=169} [2024-06-27 20:17:52,780 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 102 predicate places. [2024-06-27 20:17:52,780 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 169 transitions, 1314 flow [2024-06-27 20:17:52,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:52,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:52,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:52,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 20:17:52,781 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:52,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:52,781 INFO L85 PathProgramCache]: Analyzing trace with hash 753830908, now seen corresponding path program 1 times [2024-06-27 20:17:52,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:52,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900286951] [2024-06-27 20:17:52,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:52,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:52,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:53,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:53,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:53,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900286951] [2024-06-27 20:17:53,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900286951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:53,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:53,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:17:53,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853324714] [2024-06-27 20:17:53,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:53,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:17:53,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:53,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:17:53,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:17:53,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-27 20:17:53,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 169 transitions, 1314 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:53,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:53,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-27 20:17:53,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:54,195 INFO L124 PetriNetUnfolderBase]: 1850/3092 cut-off events. [2024-06-27 20:17:54,195 INFO L125 PetriNetUnfolderBase]: For 241131/241131 co-relation queries the response was YES. [2024-06-27 20:17:54,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24006 conditions, 3092 events. 1850/3092 cut-off events. For 241131/241131 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 17508 event pairs, 568 based on Foata normal form. 1/3069 useless extension candidates. Maximal degree in co-relation 23939. Up to 2698 conditions per place. [2024-06-27 20:17:54,222 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 140 selfloop transitions, 14 changer transitions 0/182 dead transitions. [2024-06-27 20:17:54,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 182 transitions, 1684 flow [2024-06-27 20:17:54,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:17:54,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:17:54,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-27 20:17:54,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 20:17:54,223 INFO L175 Difference]: Start difference. First operand has 147 places, 169 transitions, 1314 flow. Second operand 7 states and 140 transitions. [2024-06-27 20:17:54,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 182 transitions, 1684 flow [2024-06-27 20:17:54,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 182 transitions, 1599 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 20:17:54,362 INFO L231 Difference]: Finished difference. Result has 148 places, 172 transitions, 1307 flow [2024-06-27 20:17:54,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1229, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1307, PETRI_PLACES=148, PETRI_TRANSITIONS=172} [2024-06-27 20:17:54,362 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 103 predicate places. [2024-06-27 20:17:54,362 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 172 transitions, 1307 flow [2024-06-27 20:17:54,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:54,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:54,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:54,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 20:17:54,363 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:54,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:54,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1960091435, now seen corresponding path program 1 times [2024-06-27 20:17:54,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:54,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672002598] [2024-06-27 20:17:54,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:54,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:54,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:55,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:55,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:55,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672002598] [2024-06-27 20:17:55,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672002598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:55,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:55,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:55,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628738757] [2024-06-27 20:17:55,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:55,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:55,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:55,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:55,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:55,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:55,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 172 transitions, 1307 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:55,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:55,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:55,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:56,228 INFO L124 PetriNetUnfolderBase]: 2311/3627 cut-off events. [2024-06-27 20:17:56,228 INFO L125 PetriNetUnfolderBase]: For 299539/299539 co-relation queries the response was YES. [2024-06-27 20:17:56,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28765 conditions, 3627 events. 2311/3627 cut-off events. For 299539/299539 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 19256 event pairs, 456 based on Foata normal form. 4/3628 useless extension candidates. Maximal degree in co-relation 28697. Up to 3200 conditions per place. [2024-06-27 20:17:56,256 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 186 selfloop transitions, 25 changer transitions 0/218 dead transitions. [2024-06-27 20:17:56,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 218 transitions, 2103 flow [2024-06-27 20:17:56,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:17:56,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:17:56,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-27 20:17:56,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46136363636363636 [2024-06-27 20:17:56,258 INFO L175 Difference]: Start difference. First operand has 148 places, 172 transitions, 1307 flow. Second operand 10 states and 203 transitions. [2024-06-27 20:17:56,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 218 transitions, 2103 flow [2024-06-27 20:17:56,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 218 transitions, 2047 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 20:17:56,360 INFO L231 Difference]: Finished difference. Result has 153 places, 176 transitions, 1412 flow [2024-06-27 20:17:56,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1412, PETRI_PLACES=153, PETRI_TRANSITIONS=176} [2024-06-27 20:17:56,361 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 108 predicate places. [2024-06-27 20:17:56,361 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 176 transitions, 1412 flow [2024-06-27 20:17:56,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:56,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:56,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:56,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 20:17:56,362 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:56,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:56,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1871525675, now seen corresponding path program 2 times [2024-06-27 20:17:56,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:56,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566526415] [2024-06-27 20:17:56,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:56,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:56,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:57,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:57,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:57,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566526415] [2024-06-27 20:17:57,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566526415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:57,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:57,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:57,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20291554] [2024-06-27 20:17:57,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:57,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:57,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:57,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:57,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:57,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:57,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 176 transitions, 1412 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:57,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:57,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:57,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:58,154 INFO L124 PetriNetUnfolderBase]: 2328/3654 cut-off events. [2024-06-27 20:17:58,154 INFO L125 PetriNetUnfolderBase]: For 313415/313415 co-relation queries the response was YES. [2024-06-27 20:17:58,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29420 conditions, 3654 events. 2328/3654 cut-off events. For 313415/313415 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 19376 event pairs, 618 based on Foata normal form. 4/3655 useless extension candidates. Maximal degree in co-relation 29351. Up to 3290 conditions per place. [2024-06-27 20:17:58,184 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 186 selfloop transitions, 22 changer transitions 0/215 dead transitions. [2024-06-27 20:17:58,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 215 transitions, 2148 flow [2024-06-27 20:17:58,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:17:58,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:17:58,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-27 20:17:58,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2024-06-27 20:17:58,186 INFO L175 Difference]: Start difference. First operand has 153 places, 176 transitions, 1412 flow. Second operand 9 states and 184 transitions. [2024-06-27 20:17:58,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 215 transitions, 2148 flow [2024-06-27 20:17:58,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 215 transitions, 2047 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-27 20:17:58,355 INFO L231 Difference]: Finished difference. Result has 156 places, 178 transitions, 1416 flow [2024-06-27 20:17:58,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1416, PETRI_PLACES=156, PETRI_TRANSITIONS=178} [2024-06-27 20:17:58,356 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 111 predicate places. [2024-06-27 20:17:58,356 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 178 transitions, 1416 flow [2024-06-27 20:17:58,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:58,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:58,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:58,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 20:17:58,356 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:58,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:58,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1018104341, now seen corresponding path program 3 times [2024-06-27 20:17:58,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:58,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121915245] [2024-06-27 20:17:58,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:58,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:58,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:59,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:59,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:59,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121915245] [2024-06-27 20:17:59,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121915245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:59,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:59,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:59,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836734733] [2024-06-27 20:17:59,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:59,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:59,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:59,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:59,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:59,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:59,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 178 transitions, 1416 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:59,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:59,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:59,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:00,250 INFO L124 PetriNetUnfolderBase]: 2320/3642 cut-off events. [2024-06-27 20:18:00,250 INFO L125 PetriNetUnfolderBase]: For 322192/322192 co-relation queries the response was YES. [2024-06-27 20:18:00,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29315 conditions, 3642 events. 2320/3642 cut-off events. For 322192/322192 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 19348 event pairs, 621 based on Foata normal form. 4/3643 useless extension candidates. Maximal degree in co-relation 29244. Up to 3325 conditions per place. [2024-06-27 20:18:00,285 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 186 selfloop transitions, 19 changer transitions 0/212 dead transitions. [2024-06-27 20:18:00,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 212 transitions, 1912 flow [2024-06-27 20:18:00,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:18:00,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:18:00,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-27 20:18:00,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 20:18:00,286 INFO L175 Difference]: Start difference. First operand has 156 places, 178 transitions, 1416 flow. Second operand 9 states and 180 transitions. [2024-06-27 20:18:00,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 212 transitions, 1912 flow [2024-06-27 20:18:00,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 212 transitions, 1809 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-27 20:18:00,476 INFO L231 Difference]: Finished difference. Result has 158 places, 178 transitions, 1358 flow [2024-06-27 20:18:00,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1313, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1358, PETRI_PLACES=158, PETRI_TRANSITIONS=178} [2024-06-27 20:18:00,477 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 113 predicate places. [2024-06-27 20:18:00,477 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 178 transitions, 1358 flow [2024-06-27 20:18:00,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:00,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:00,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:00,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 20:18:00,478 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:00,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:00,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1733682987, now seen corresponding path program 4 times [2024-06-27 20:18:00,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:00,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498898767] [2024-06-27 20:18:00,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:00,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:00,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:01,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:01,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:01,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498898767] [2024-06-27 20:18:01,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498898767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:01,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:01,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:18:01,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185481085] [2024-06-27 20:18:01,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:01,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:18:01,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:01,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:18:01,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:18:01,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:01,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 178 transitions, 1358 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:01,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:01,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:01,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:02,384 INFO L124 PetriNetUnfolderBase]: 2337/3670 cut-off events. [2024-06-27 20:18:02,384 INFO L125 PetriNetUnfolderBase]: For 335006/335009 co-relation queries the response was YES. [2024-06-27 20:18:02,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29624 conditions, 3670 events. 2337/3670 cut-off events. For 335006/335009 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 19504 event pairs, 629 based on Foata normal form. 4/3670 useless extension candidates. Maximal degree in co-relation 29552. Up to 3226 conditions per place. [2024-06-27 20:18:02,419 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 152 selfloop transitions, 52 changer transitions 0/211 dead transitions. [2024-06-27 20:18:02,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 211 transitions, 1898 flow [2024-06-27 20:18:02,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:18:02,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:18:02,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-27 20:18:02,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2024-06-27 20:18:02,422 INFO L175 Difference]: Start difference. First operand has 158 places, 178 transitions, 1358 flow. Second operand 9 states and 184 transitions. [2024-06-27 20:18:02,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 211 transitions, 1898 flow [2024-06-27 20:18:02,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 211 transitions, 1855 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-27 20:18:02,599 INFO L231 Difference]: Finished difference. Result has 159 places, 180 transitions, 1484 flow [2024-06-27 20:18:02,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1315, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1484, PETRI_PLACES=159, PETRI_TRANSITIONS=180} [2024-06-27 20:18:02,603 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 114 predicate places. [2024-06-27 20:18:02,603 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 180 transitions, 1484 flow [2024-06-27 20:18:02,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:02,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:02,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:02,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 20:18:02,604 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:02,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:02,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1739045367, now seen corresponding path program 5 times [2024-06-27 20:18:02,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:02,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948295850] [2024-06-27 20:18:02,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:02,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:02,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:03,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:03,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:03,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948295850] [2024-06-27 20:18:03,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948295850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:03,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:03,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:18:03,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161535330] [2024-06-27 20:18:03,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:03,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:18:03,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:03,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:18:03,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:18:03,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:03,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 180 transitions, 1484 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:03,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:03,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:03,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:04,551 INFO L124 PetriNetUnfolderBase]: 2354/3697 cut-off events. [2024-06-27 20:18:04,551 INFO L125 PetriNetUnfolderBase]: For 349709/349712 co-relation queries the response was YES. [2024-06-27 20:18:04,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30369 conditions, 3697 events. 2354/3697 cut-off events. For 349709/349712 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 19682 event pairs, 634 based on Foata normal form. 4/3697 useless extension candidates. Maximal degree in co-relation 30296. Up to 3253 conditions per place. [2024-06-27 20:18:04,586 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 155 selfloop transitions, 51 changer transitions 0/213 dead transitions. [2024-06-27 20:18:04,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 213 transitions, 2032 flow [2024-06-27 20:18:04,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:18:04,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:18:04,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-27 20:18:04,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4671717171717172 [2024-06-27 20:18:04,588 INFO L175 Difference]: Start difference. First operand has 159 places, 180 transitions, 1484 flow. Second operand 9 states and 185 transitions. [2024-06-27 20:18:04,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 213 transitions, 2032 flow [2024-06-27 20:18:04,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 213 transitions, 1881 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-27 20:18:04,788 INFO L231 Difference]: Finished difference. Result has 161 places, 182 transitions, 1504 flow [2024-06-27 20:18:04,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1333, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1504, PETRI_PLACES=161, PETRI_TRANSITIONS=182} [2024-06-27 20:18:04,789 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 116 predicate places. [2024-06-27 20:18:04,789 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 182 transitions, 1504 flow [2024-06-27 20:18:04,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:04,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:04,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:04,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 20:18:04,790 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:04,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:04,790 INFO L85 PathProgramCache]: Analyzing trace with hash -2116983597, now seen corresponding path program 6 times [2024-06-27 20:18:04,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:04,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050456479] [2024-06-27 20:18:04,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:04,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:04,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:05,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:05,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:05,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050456479] [2024-06-27 20:18:05,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050456479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:05,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:05,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:18:05,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290280410] [2024-06-27 20:18:05,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:05,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:18:05,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:05,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:18:05,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:18:05,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:05,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 182 transitions, 1504 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:05,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:05,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:05,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:06,429 INFO L124 PetriNetUnfolderBase]: 2371/3724 cut-off events. [2024-06-27 20:18:06,429 INFO L125 PetriNetUnfolderBase]: For 363995/363998 co-relation queries the response was YES. [2024-06-27 20:18:06,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30887 conditions, 3724 events. 2371/3724 cut-off events. For 363995/363998 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 19831 event pairs, 629 based on Foata normal form. 4/3724 useless extension candidates. Maximal degree in co-relation 30813. Up to 3221 conditions per place. [2024-06-27 20:18:06,460 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 153 selfloop transitions, 56 changer transitions 0/216 dead transitions. [2024-06-27 20:18:06,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 216 transitions, 2064 flow [2024-06-27 20:18:06,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:18:06,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:18:06,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-27 20:18:06,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-27 20:18:06,461 INFO L175 Difference]: Start difference. First operand has 161 places, 182 transitions, 1504 flow. Second operand 9 states and 186 transitions. [2024-06-27 20:18:06,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 216 transitions, 2064 flow [2024-06-27 20:18:06,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 216 transitions, 1911 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-27 20:18:06,632 INFO L231 Difference]: Finished difference. Result has 163 places, 184 transitions, 1536 flow [2024-06-27 20:18:06,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1351, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1536, PETRI_PLACES=163, PETRI_TRANSITIONS=184} [2024-06-27 20:18:06,633 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 118 predicate places. [2024-06-27 20:18:06,633 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 184 transitions, 1536 flow [2024-06-27 20:18:06,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:06,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:06,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:06,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 20:18:06,633 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:06,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:06,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1480124396, now seen corresponding path program 1 times [2024-06-27 20:18:06,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:06,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509466169] [2024-06-27 20:18:06,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:06,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:06,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:07,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:07,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:07,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509466169] [2024-06-27 20:18:07,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509466169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:07,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:07,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:18:07,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626894194] [2024-06-27 20:18:07,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:07,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:18:07,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:07,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:18:07,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:18:07,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:18:07,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 184 transitions, 1536 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:07,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:07,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:18:07,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:08,109 INFO L124 PetriNetUnfolderBase]: 2146/3469 cut-off events. [2024-06-27 20:18:08,109 INFO L125 PetriNetUnfolderBase]: For 370621/370625 co-relation queries the response was YES. [2024-06-27 20:18:08,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29799 conditions, 3469 events. 2146/3469 cut-off events. For 370621/370625 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 19234 event pairs, 652 based on Foata normal form. 2/3447 useless extension candidates. Maximal degree in co-relation 29724. Up to 3095 conditions per place. [2024-06-27 20:18:08,139 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 154 selfloop transitions, 16 changer transitions 0/203 dead transitions. [2024-06-27 20:18:08,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 203 transitions, 1958 flow [2024-06-27 20:18:08,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:18:08,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:18:08,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-27 20:18:08,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 20:18:08,141 INFO L175 Difference]: Start difference. First operand has 163 places, 184 transitions, 1536 flow. Second operand 7 states and 140 transitions. [2024-06-27 20:18:08,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 203 transitions, 1958 flow [2024-06-27 20:18:08,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 203 transitions, 1791 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-27 20:18:08,280 INFO L231 Difference]: Finished difference. Result has 163 places, 187 transitions, 1455 flow [2024-06-27 20:18:08,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1369, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1455, PETRI_PLACES=163, PETRI_TRANSITIONS=187} [2024-06-27 20:18:08,280 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 118 predicate places. [2024-06-27 20:18:08,281 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 187 transitions, 1455 flow [2024-06-27 20:18:08,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:08,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:08,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:08,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 20:18:08,281 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:08,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:08,282 INFO L85 PathProgramCache]: Analyzing trace with hash 966227465, now seen corresponding path program 7 times [2024-06-27 20:18:08,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:08,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848787790] [2024-06-27 20:18:08,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:08,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:08,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:09,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:09,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:09,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848787790] [2024-06-27 20:18:09,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848787790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:09,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:09,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:18:09,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344815021] [2024-06-27 20:18:09,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:09,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:18:09,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:09,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:18:09,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:18:09,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:09,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 187 transitions, 1455 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:09,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:09,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:09,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:10,265 INFO L124 PetriNetUnfolderBase]: 2414/3779 cut-off events. [2024-06-27 20:18:10,265 INFO L125 PetriNetUnfolderBase]: For 391318/391321 co-relation queries the response was YES. [2024-06-27 20:18:10,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31989 conditions, 3779 events. 2414/3779 cut-off events. For 391318/391321 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 20161 event pairs, 646 based on Foata normal form. 4/3776 useless extension candidates. Maximal degree in co-relation 31913. Up to 3333 conditions per place. [2024-06-27 20:18:10,303 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 157 selfloop transitions, 52 changer transitions 0/217 dead transitions. [2024-06-27 20:18:10,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 217 transitions, 2009 flow [2024-06-27 20:18:10,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:18:10,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:18:10,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-27 20:18:10,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45707070707070707 [2024-06-27 20:18:10,304 INFO L175 Difference]: Start difference. First operand has 163 places, 187 transitions, 1455 flow. Second operand 9 states and 181 transitions. [2024-06-27 20:18:10,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 217 transitions, 2009 flow [2024-06-27 20:18:10,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 217 transitions, 1945 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 20:18:10,507 INFO L231 Difference]: Finished difference. Result has 167 places, 189 transitions, 1572 flow [2024-06-27 20:18:10,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1391, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1572, PETRI_PLACES=167, PETRI_TRANSITIONS=189} [2024-06-27 20:18:10,508 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 122 predicate places. [2024-06-27 20:18:10,508 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 189 transitions, 1572 flow [2024-06-27 20:18:10,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:10,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:10,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:10,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 20:18:10,509 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:10,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:10,509 INFO L85 PathProgramCache]: Analyzing trace with hash 966079595, now seen corresponding path program 8 times [2024-06-27 20:18:10,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:10,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121937743] [2024-06-27 20:18:10,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:10,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:10,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:11,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:11,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:11,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121937743] [2024-06-27 20:18:11,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121937743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:11,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:11,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:18:11,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658073518] [2024-06-27 20:18:11,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:11,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:18:11,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:11,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:18:11,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:18:11,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:11,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 189 transitions, 1572 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:11,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:11,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:11,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:12,446 INFO L124 PetriNetUnfolderBase]: 2431/3806 cut-off events. [2024-06-27 20:18:12,446 INFO L125 PetriNetUnfolderBase]: For 407933/407936 co-relation queries the response was YES. [2024-06-27 20:18:12,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32758 conditions, 3806 events. 2431/3806 cut-off events. For 407933/407936 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 20357 event pairs, 641 based on Foata normal form. 4/3803 useless extension candidates. Maximal degree in co-relation 32681. Up to 3290 conditions per place. [2024-06-27 20:18:12,481 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 159 selfloop transitions, 57 changer transitions 0/224 dead transitions. [2024-06-27 20:18:12,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 224 transitions, 2420 flow [2024-06-27 20:18:12,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:18:12,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:18:12,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-27 20:18:12,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2024-06-27 20:18:12,482 INFO L175 Difference]: Start difference. First operand has 167 places, 189 transitions, 1572 flow. Second operand 9 states and 184 transitions. [2024-06-27 20:18:12,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 224 transitions, 2420 flow [2024-06-27 20:18:12,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 224 transitions, 2257 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-27 20:18:12,674 INFO L231 Difference]: Finished difference. Result has 169 places, 193 transitions, 1674 flow [2024-06-27 20:18:12,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1674, PETRI_PLACES=169, PETRI_TRANSITIONS=193} [2024-06-27 20:18:12,675 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 124 predicate places. [2024-06-27 20:18:12,675 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 193 transitions, 1674 flow [2024-06-27 20:18:12,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:12,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:12,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:12,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 20:18:12,676 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:12,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:12,676 INFO L85 PathProgramCache]: Analyzing trace with hash 971589845, now seen corresponding path program 9 times [2024-06-27 20:18:12,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:12,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303367888] [2024-06-27 20:18:12,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:12,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:12,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:13,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:13,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:13,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303367888] [2024-06-27 20:18:13,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303367888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:13,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:13,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:18:13,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079771334] [2024-06-27 20:18:13,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:13,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:18:13,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:13,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:18:13,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:18:13,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:13,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 193 transitions, 1674 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:13,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:13,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:13,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:14,675 INFO L124 PetriNetUnfolderBase]: 2448/3833 cut-off events. [2024-06-27 20:18:14,675 INFO L125 PetriNetUnfolderBase]: For 424135/424138 co-relation queries the response was YES. [2024-06-27 20:18:14,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33304 conditions, 3833 events. 2448/3833 cut-off events. For 424135/424138 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 20493 event pairs, 646 based on Foata normal form. 4/3830 useless extension candidates. Maximal degree in co-relation 33226. Up to 3387 conditions per place. [2024-06-27 20:18:14,772 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 164 selfloop transitions, 51 changer transitions 0/223 dead transitions. [2024-06-27 20:18:14,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 223 transitions, 2248 flow [2024-06-27 20:18:14,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:18:14,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:18:14,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-27 20:18:14,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595959595959596 [2024-06-27 20:18:14,774 INFO L175 Difference]: Start difference. First operand has 169 places, 193 transitions, 1674 flow. Second operand 9 states and 182 transitions. [2024-06-27 20:18:14,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 223 transitions, 2248 flow [2024-06-27 20:18:14,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 223 transitions, 2080 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-27 20:18:14,993 INFO L231 Difference]: Finished difference. Result has 173 places, 195 transitions, 1693 flow [2024-06-27 20:18:14,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1528, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1693, PETRI_PLACES=173, PETRI_TRANSITIONS=195} [2024-06-27 20:18:14,994 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 128 predicate places. [2024-06-27 20:18:14,994 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 195 transitions, 1693 flow [2024-06-27 20:18:14,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:14,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:14,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:14,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 20:18:14,994 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:14,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:14,995 INFO L85 PathProgramCache]: Analyzing trace with hash -553409097, now seen corresponding path program 10 times [2024-06-27 20:18:14,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:14,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144033959] [2024-06-27 20:18:14,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:14,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:15,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:15,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:15,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:15,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144033959] [2024-06-27 20:18:15,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144033959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:15,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:15,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:18:15,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802946143] [2024-06-27 20:18:15,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:15,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:18:15,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:15,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:18:15,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:18:16,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:16,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 195 transitions, 1693 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:16,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:16,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:16,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:17,071 INFO L124 PetriNetUnfolderBase]: 2440/3821 cut-off events. [2024-06-27 20:18:17,071 INFO L125 PetriNetUnfolderBase]: For 430287/430290 co-relation queries the response was YES. [2024-06-27 20:18:17,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33123 conditions, 3821 events. 2440/3821 cut-off events. For 430287/430290 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 20450 event pairs, 644 based on Foata normal form. 4/3818 useless extension candidates. Maximal degree in co-relation 33043. Up to 3375 conditions per place. [2024-06-27 20:18:17,110 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 161 selfloop transitions, 54 changer transitions 0/223 dead transitions. [2024-06-27 20:18:17,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 223 transitions, 2193 flow [2024-06-27 20:18:17,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:18:17,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:18:17,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-27 20:18:17,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 20:18:17,111 INFO L175 Difference]: Start difference. First operand has 173 places, 195 transitions, 1693 flow. Second operand 9 states and 180 transitions. [2024-06-27 20:18:17,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 223 transitions, 2193 flow [2024-06-27 20:18:17,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 223 transitions, 2012 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-27 20:18:17,350 INFO L231 Difference]: Finished difference. Result has 175 places, 195 transitions, 1627 flow [2024-06-27 20:18:17,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1512, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1627, PETRI_PLACES=175, PETRI_TRANSITIONS=195} [2024-06-27 20:18:17,351 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 130 predicate places. [2024-06-27 20:18:17,351 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 195 transitions, 1627 flow [2024-06-27 20:18:17,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:17,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:17,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:17,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 20:18:17,351 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:17,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:17,352 INFO L85 PathProgramCache]: Analyzing trace with hash 741563566, now seen corresponding path program 2 times [2024-06-27 20:18:17,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:17,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951219273] [2024-06-27 20:18:17,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:17,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:17,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:18,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:18,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:18,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951219273] [2024-06-27 20:18:18,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951219273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:18,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:18,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:18:18,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72429730] [2024-06-27 20:18:18,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:18,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:18:18,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:18,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:18:18,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:18:18,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:18:18,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 195 transitions, 1627 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:18,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:18,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:18:18,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:18,845 INFO L124 PetriNetUnfolderBase]: 2184/3527 cut-off events. [2024-06-27 20:18:18,845 INFO L125 PetriNetUnfolderBase]: For 432034/432052 co-relation queries the response was YES. [2024-06-27 20:18:18,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31368 conditions, 3527 events. 2184/3527 cut-off events. For 432034/432052 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 19720 event pairs, 662 based on Foata normal form. 5/3501 useless extension candidates. Maximal degree in co-relation 31287. Up to 3129 conditions per place. [2024-06-27 20:18:18,878 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 147 selfloop transitions, 28 changer transitions 0/212 dead transitions. [2024-06-27 20:18:18,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 212 transitions, 2213 flow [2024-06-27 20:18:18,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:18:18,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:18:18,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-27 20:18:18,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-06-27 20:18:18,879 INFO L175 Difference]: Start difference. First operand has 175 places, 195 transitions, 1627 flow. Second operand 7 states and 139 transitions. [2024-06-27 20:18:18,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 212 transitions, 2213 flow [2024-06-27 20:18:19,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 212 transitions, 2086 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 20:18:19,157 INFO L231 Difference]: Finished difference. Result has 174 places, 201 transitions, 1664 flow [2024-06-27 20:18:19,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1500, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1664, PETRI_PLACES=174, PETRI_TRANSITIONS=201} [2024-06-27 20:18:19,158 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 129 predicate places. [2024-06-27 20:18:19,158 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 201 transitions, 1664 flow [2024-06-27 20:18:19,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:19,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:19,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:19,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 20:18:19,159 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:19,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:19,159 INFO L85 PathProgramCache]: Analyzing trace with hash 173778862, now seen corresponding path program 3 times [2024-06-27 20:18:19,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:19,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193257599] [2024-06-27 20:18:19,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:19,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:19,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:20,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:20,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:20,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193257599] [2024-06-27 20:18:20,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193257599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:20,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:20,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:18:20,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125267065] [2024-06-27 20:18:20,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:20,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:18:20,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:20,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:18:20,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:18:20,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:18:20,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 201 transitions, 1664 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:20,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:20,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:18:20,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:20,601 INFO L124 PetriNetUnfolderBase]: 2181/3523 cut-off events. [2024-06-27 20:18:20,601 INFO L125 PetriNetUnfolderBase]: For 446261/446269 co-relation queries the response was YES. [2024-06-27 20:18:20,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31700 conditions, 3523 events. 2181/3523 cut-off events. For 446261/446269 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 19703 event pairs, 662 based on Foata normal form. 9/3502 useless extension candidates. Maximal degree in co-relation 31618. Up to 3126 conditions per place. [2024-06-27 20:18:20,636 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 145 selfloop transitions, 29 changer transitions 0/211 dead transitions. [2024-06-27 20:18:20,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 211 transitions, 2036 flow [2024-06-27 20:18:20,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:18:20,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:18:20,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 20:18:20,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448051948051948 [2024-06-27 20:18:20,637 INFO L175 Difference]: Start difference. First operand has 174 places, 201 transitions, 1664 flow. Second operand 7 states and 137 transitions. [2024-06-27 20:18:20,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 211 transitions, 2036 flow [2024-06-27 20:18:20,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 211 transitions, 1933 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-27 20:18:20,937 INFO L231 Difference]: Finished difference. Result has 178 places, 201 transitions, 1625 flow [2024-06-27 20:18:20,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1561, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1625, PETRI_PLACES=178, PETRI_TRANSITIONS=201} [2024-06-27 20:18:20,938 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 133 predicate places. [2024-06-27 20:18:20,938 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 201 transitions, 1625 flow [2024-06-27 20:18:20,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:20,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:20,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:20,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 20:18:20,939 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:20,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:20,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1199219904, now seen corresponding path program 1 times [2024-06-27 20:18:20,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:20,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133653492] [2024-06-27 20:18:20,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:20,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:20,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:21,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:21,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:21,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133653492] [2024-06-27 20:18:21,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133653492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:21,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:21,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:18:21,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749157810] [2024-06-27 20:18:21,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:21,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:18:21,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:21,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:18:21,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:18:21,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:18:21,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 201 transitions, 1625 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:21,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:21,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:18:21,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:22,223 INFO L124 PetriNetUnfolderBase]: 2206/3572 cut-off events. [2024-06-27 20:18:22,223 INFO L125 PetriNetUnfolderBase]: For 401023/401023 co-relation queries the response was YES. [2024-06-27 20:18:22,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30248 conditions, 3572 events. 2206/3572 cut-off events. For 401023/401023 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 19743 event pairs, 540 based on Foata normal form. 1/3570 useless extension candidates. Maximal degree in co-relation 30164. Up to 3212 conditions per place. [2024-06-27 20:18:22,256 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 195 selfloop transitions, 14 changer transitions 0/220 dead transitions. [2024-06-27 20:18:22,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 220 transitions, 2139 flow [2024-06-27 20:18:22,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:18:22,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:18:22,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-27 20:18:22,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 20:18:22,258 INFO L175 Difference]: Start difference. First operand has 178 places, 201 transitions, 1625 flow. Second operand 7 states and 140 transitions. [2024-06-27 20:18:22,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 220 transitions, 2139 flow [2024-06-27 20:18:22,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 220 transitions, 2073 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 20:18:22,525 INFO L231 Difference]: Finished difference. Result has 179 places, 204 transitions, 1655 flow [2024-06-27 20:18:22,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1559, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1655, PETRI_PLACES=179, PETRI_TRANSITIONS=204} [2024-06-27 20:18:22,526 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 134 predicate places. [2024-06-27 20:18:22,526 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 204 transitions, 1655 flow [2024-06-27 20:18:22,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:22,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:22,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:22,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 20:18:22,527 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:22,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:22,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1657440428, now seen corresponding path program 1 times [2024-06-27 20:18:22,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:22,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990013836] [2024-06-27 20:18:22,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:22,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:22,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:23,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:23,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:23,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990013836] [2024-06-27 20:18:23,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990013836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:23,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:23,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:18:23,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715477029] [2024-06-27 20:18:23,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:23,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:18:23,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:23,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:18:23,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:18:23,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:18:23,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 204 transitions, 1655 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:23,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:23,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:18:23,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:23,900 INFO L124 PetriNetUnfolderBase]: 2207/3575 cut-off events. [2024-06-27 20:18:23,900 INFO L125 PetriNetUnfolderBase]: For 409730/409730 co-relation queries the response was YES. [2024-06-27 20:18:23,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30392 conditions, 3575 events. 2207/3575 cut-off events. For 409730/409730 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 19806 event pairs, 582 based on Foata normal form. 1/3573 useless extension candidates. Maximal degree in co-relation 30307. Up to 3167 conditions per place. [2024-06-27 20:18:23,936 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 178 selfloop transitions, 14 changer transitions 0/220 dead transitions. [2024-06-27 20:18:23,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 220 transitions, 2123 flow [2024-06-27 20:18:23,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:18:23,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:18:23,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 20:18:23,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448051948051948 [2024-06-27 20:18:23,946 INFO L175 Difference]: Start difference. First operand has 179 places, 204 transitions, 1655 flow. Second operand 7 states and 137 transitions. [2024-06-27 20:18:23,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 220 transitions, 2123 flow [2024-06-27 20:18:24,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 220 transitions, 2049 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 20:18:24,205 INFO L231 Difference]: Finished difference. Result has 181 places, 207 transitions, 1673 flow [2024-06-27 20:18:24,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1581, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1673, PETRI_PLACES=181, PETRI_TRANSITIONS=207} [2024-06-27 20:18:24,206 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 136 predicate places. [2024-06-27 20:18:24,206 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 207 transitions, 1673 flow [2024-06-27 20:18:24,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:24,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:24,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:24,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 20:18:24,208 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:24,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:24,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1199040414, now seen corresponding path program 2 times [2024-06-27 20:18:24,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:24,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632590249] [2024-06-27 20:18:24,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:24,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:24,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:24,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:24,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:24,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632590249] [2024-06-27 20:18:24,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632590249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:24,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:24,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:18:24,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928867598] [2024-06-27 20:18:24,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:24,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:18:24,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:24,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:18:24,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:18:24,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:18:24,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 207 transitions, 1673 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:24,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:24,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:18:24,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:25,501 INFO L124 PetriNetUnfolderBase]: 2226/3596 cut-off events. [2024-06-27 20:18:25,501 INFO L125 PetriNetUnfolderBase]: For 427016/427016 co-relation queries the response was YES. [2024-06-27 20:18:25,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31410 conditions, 3596 events. 2226/3596 cut-off events. For 427016/427016 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 19843 event pairs, 539 based on Foata normal form. 1/3594 useless extension candidates. Maximal degree in co-relation 31324. Up to 3228 conditions per place. [2024-06-27 20:18:25,534 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 192 selfloop transitions, 19 changer transitions 0/223 dead transitions. [2024-06-27 20:18:25,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 223 transitions, 2191 flow [2024-06-27 20:18:25,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:18:25,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:18:25,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-27 20:18:25,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-06-27 20:18:25,535 INFO L175 Difference]: Start difference. First operand has 181 places, 207 transitions, 1673 flow. Second operand 7 states and 139 transitions. [2024-06-27 20:18:25,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 223 transitions, 2191 flow [2024-06-27 20:18:25,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 223 transitions, 2121 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 20:18:25,823 INFO L231 Difference]: Finished difference. Result has 183 places, 210 transitions, 1717 flow [2024-06-27 20:18:25,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1603, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1717, PETRI_PLACES=183, PETRI_TRANSITIONS=210} [2024-06-27 20:18:25,823 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 138 predicate places. [2024-06-27 20:18:25,824 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 210 transitions, 1717 flow [2024-06-27 20:18:25,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:25,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:25,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:25,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 20:18:25,824 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:25,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:25,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1893615788, now seen corresponding path program 2 times [2024-06-27 20:18:25,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:25,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037059100] [2024-06-27 20:18:25,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:25,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:25,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:26,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:26,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:26,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037059100] [2024-06-27 20:18:26,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037059100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:26,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:26,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:18:26,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029752301] [2024-06-27 20:18:26,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:26,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:18:26,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:26,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:18:26,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:18:26,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:18:26,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 210 transitions, 1717 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:26,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:26,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:18:26,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:27,370 INFO L124 PetriNetUnfolderBase]: 2217/3590 cut-off events. [2024-06-27 20:18:27,370 INFO L125 PetriNetUnfolderBase]: For 435546/435549 co-relation queries the response was YES. [2024-06-27 20:18:27,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31432 conditions, 3590 events. 2217/3590 cut-off events. For 435546/435549 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 19868 event pairs, 586 based on Foata normal form. 3/3589 useless extension candidates. Maximal degree in co-relation 31345. Up to 3163 conditions per place. [2024-06-27 20:18:27,412 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 172 selfloop transitions, 26 changer transitions 0/227 dead transitions. [2024-06-27 20:18:27,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 227 transitions, 2383 flow [2024-06-27 20:18:27,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:18:27,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:18:27,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-27 20:18:27,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-06-27 20:18:27,413 INFO L175 Difference]: Start difference. First operand has 183 places, 210 transitions, 1717 flow. Second operand 7 states and 139 transitions. [2024-06-27 20:18:27,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 227 transitions, 2383 flow [2024-06-27 20:18:27,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 227 transitions, 2291 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 20:18:27,649 INFO L231 Difference]: Finished difference. Result has 185 places, 216 transitions, 1809 flow [2024-06-27 20:18:27,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1625, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1809, PETRI_PLACES=185, PETRI_TRANSITIONS=216} [2024-06-27 20:18:27,650 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 140 predicate places. [2024-06-27 20:18:27,650 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 216 transitions, 1809 flow [2024-06-27 20:18:27,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:27,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:27,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:27,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 20:18:27,651 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:27,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:27,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1192553664, now seen corresponding path program 3 times [2024-06-27 20:18:27,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:27,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567828626] [2024-06-27 20:18:27,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:27,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:27,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:28,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:28,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:28,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567828626] [2024-06-27 20:18:28,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567828626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:28,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:28,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:18:28,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376606941] [2024-06-27 20:18:28,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:28,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:18:28,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:28,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:18:28,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:18:28,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:18:28,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 216 transitions, 1809 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:28,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:28,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:18:28,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:29,116 INFO L124 PetriNetUnfolderBase]: 2228/3600 cut-off events. [2024-06-27 20:18:29,116 INFO L125 PetriNetUnfolderBase]: For 453295/453298 co-relation queries the response was YES. [2024-06-27 20:18:29,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32314 conditions, 3600 events. 2228/3600 cut-off events. For 453295/453298 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 19837 event pairs, 547 based on Foata normal form. 1/3597 useless extension candidates. Maximal degree in co-relation 32226. Up to 3220 conditions per place. [2024-06-27 20:18:29,150 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 189 selfloop transitions, 26 changer transitions 0/229 dead transitions. [2024-06-27 20:18:29,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 229 transitions, 2335 flow [2024-06-27 20:18:29,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:18:29,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:18:29,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-27 20:18:29,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-27 20:18:29,152 INFO L175 Difference]: Start difference. First operand has 185 places, 216 transitions, 1809 flow. Second operand 7 states and 138 transitions. [2024-06-27 20:18:29,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 229 transitions, 2335 flow [2024-06-27 20:18:29,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 229 transitions, 2253 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-27 20:18:29,500 INFO L231 Difference]: Finished difference. Result has 189 places, 219 transitions, 1863 flow [2024-06-27 20:18:29,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1727, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1863, PETRI_PLACES=189, PETRI_TRANSITIONS=219} [2024-06-27 20:18:29,500 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 144 predicate places. [2024-06-27 20:18:29,500 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 219 transitions, 1863 flow [2024-06-27 20:18:29,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:29,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:29,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:29,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 20:18:29,501 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:29,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:29,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1893912458, now seen corresponding path program 3 times [2024-06-27 20:18:29,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:29,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632353072] [2024-06-27 20:18:29,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:29,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:29,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:30,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:30,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:30,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632353072] [2024-06-27 20:18:30,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632353072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:30,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:30,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:18:30,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254315852] [2024-06-27 20:18:30,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:30,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:18:30,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:30,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:18:30,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:18:30,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:18:30,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 219 transitions, 1863 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:30,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:30,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:18:30,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:30,891 INFO L124 PetriNetUnfolderBase]: 2216/3587 cut-off events. [2024-06-27 20:18:30,891 INFO L125 PetriNetUnfolderBase]: For 457468/457471 co-relation queries the response was YES. [2024-06-27 20:18:30,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32214 conditions, 3587 events. 2216/3587 cut-off events. For 457468/457471 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 19859 event pairs, 586 based on Foata normal form. 3/3586 useless extension candidates. Maximal degree in co-relation 32124. Up to 3157 conditions per place. [2024-06-27 20:18:30,929 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 172 selfloop transitions, 27 changer transitions 0/229 dead transitions. [2024-06-27 20:18:30,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 229 transitions, 2285 flow [2024-06-27 20:18:30,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:18:30,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:18:30,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 20:18:30,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448051948051948 [2024-06-27 20:18:30,931 INFO L175 Difference]: Start difference. First operand has 189 places, 219 transitions, 1863 flow. Second operand 7 states and 137 transitions. [2024-06-27 20:18:30,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 229 transitions, 2285 flow [2024-06-27 20:18:31,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 229 transitions, 2129 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-27 20:18:31,217 INFO L231 Difference]: Finished difference. Result has 191 places, 219 transitions, 1767 flow [2024-06-27 20:18:31,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1707, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1767, PETRI_PLACES=191, PETRI_TRANSITIONS=219} [2024-06-27 20:18:31,218 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 146 predicate places. [2024-06-27 20:18:31,218 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 219 transitions, 1767 flow [2024-06-27 20:18:31,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:31,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:31,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:31,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 20:18:31,219 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:31,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:31,219 INFO L85 PathProgramCache]: Analyzing trace with hash 48382390, now seen corresponding path program 1 times [2024-06-27 20:18:31,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:31,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557553650] [2024-06-27 20:18:31,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:31,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:31,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:32,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:32,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:32,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557553650] [2024-06-27 20:18:32,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557553650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:32,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:32,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:18:32,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230776862] [2024-06-27 20:18:32,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:32,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:18:32,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:32,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:18:32,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:18:32,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:32,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 219 transitions, 1767 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:32,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:32,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:32,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:33,299 INFO L124 PetriNetUnfolderBase]: 2646/4164 cut-off events. [2024-06-27 20:18:33,300 INFO L125 PetriNetUnfolderBase]: For 633714/633714 co-relation queries the response was YES. [2024-06-27 20:18:33,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39964 conditions, 4164 events. 2646/4164 cut-off events. For 633714/633714 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 22961 event pairs, 528 based on Foata normal form. 16/4177 useless extension candidates. Maximal degree in co-relation 39873. Up to 3409 conditions per place. [2024-06-27 20:18:33,343 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 234 selfloop transitions, 29 changer transitions 0/276 dead transitions. [2024-06-27 20:18:33,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 276 transitions, 2801 flow [2024-06-27 20:18:33,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:18:33,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:18:33,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 229 transitions. [2024-06-27 20:18:33,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4731404958677686 [2024-06-27 20:18:33,345 INFO L175 Difference]: Start difference. First operand has 191 places, 219 transitions, 1767 flow. Second operand 11 states and 229 transitions. [2024-06-27 20:18:33,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 276 transitions, 2801 flow [2024-06-27 20:18:33,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 276 transitions, 2739 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 20:18:33,745 INFO L231 Difference]: Finished difference. Result has 196 places, 221 transitions, 1875 flow [2024-06-27 20:18:33,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1705, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1875, PETRI_PLACES=196, PETRI_TRANSITIONS=221} [2024-06-27 20:18:33,746 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 151 predicate places. [2024-06-27 20:18:33,746 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 221 transitions, 1875 flow [2024-06-27 20:18:33,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:33,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:33,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:33,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 20:18:33,746 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:33,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:33,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1501046346, now seen corresponding path program 2 times [2024-06-27 20:18:33,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:33,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965020405] [2024-06-27 20:18:33,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:33,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:33,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:34,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:34,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:34,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965020405] [2024-06-27 20:18:34,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965020405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:34,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:34,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:18:34,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032575448] [2024-06-27 20:18:34,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:34,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:18:34,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:34,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:18:34,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:18:35,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:35,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 221 transitions, 1875 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:35,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:35,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:35,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:35,970 INFO L124 PetriNetUnfolderBase]: 2704/4268 cut-off events. [2024-06-27 20:18:35,970 INFO L125 PetriNetUnfolderBase]: For 653203/653203 co-relation queries the response was YES. [2024-06-27 20:18:35,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41089 conditions, 4268 events. 2704/4268 cut-off events. For 653203/653203 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 23753 event pairs, 698 based on Foata normal form. 16/4281 useless extension candidates. Maximal degree in co-relation 40997. Up to 3593 conditions per place. [2024-06-27 20:18:36,015 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 234 selfloop transitions, 25 changer transitions 0/272 dead transitions. [2024-06-27 20:18:36,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 272 transitions, 2843 flow [2024-06-27 20:18:36,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:18:36,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:18:36,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-27 20:18:36,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 20:18:36,017 INFO L175 Difference]: Start difference. First operand has 196 places, 221 transitions, 1875 flow. Second operand 10 states and 210 transitions. [2024-06-27 20:18:36,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 272 transitions, 2843 flow [2024-06-27 20:18:36,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 272 transitions, 2761 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-27 20:18:36,581 INFO L231 Difference]: Finished difference. Result has 199 places, 222 transitions, 1903 flow [2024-06-27 20:18:36,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1799, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1903, PETRI_PLACES=199, PETRI_TRANSITIONS=222} [2024-06-27 20:18:36,581 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 154 predicate places. [2024-06-27 20:18:36,582 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 222 transitions, 1903 flow [2024-06-27 20:18:36,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:36,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:36,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:36,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 20:18:36,582 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:36,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:36,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1496462376, now seen corresponding path program 3 times [2024-06-27 20:18:36,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:36,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112334194] [2024-06-27 20:18:36,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:36,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:36,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:37,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:37,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:37,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112334194] [2024-06-27 20:18:37,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112334194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:37,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:37,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:18:37,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823236486] [2024-06-27 20:18:37,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:37,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:18:37,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:37,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:18:37,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:18:37,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:37,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 222 transitions, 1903 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:37,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:37,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:37,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:38,836 INFO L124 PetriNetUnfolderBase]: 2762/4366 cut-off events. [2024-06-27 20:18:38,837 INFO L125 PetriNetUnfolderBase]: For 675552/675552 co-relation queries the response was YES. [2024-06-27 20:18:38,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41672 conditions, 4366 events. 2762/4366 cut-off events. For 675552/675552 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 24433 event pairs, 709 based on Foata normal form. 16/4379 useless extension candidates. Maximal degree in co-relation 41578. Up to 3742 conditions per place. [2024-06-27 20:18:38,877 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 236 selfloop transitions, 23 changer transitions 0/272 dead transitions. [2024-06-27 20:18:38,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 272 transitions, 2869 flow [2024-06-27 20:18:38,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:18:38,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:18:38,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-27 20:18:38,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4727272727272727 [2024-06-27 20:18:38,879 INFO L175 Difference]: Start difference. First operand has 199 places, 222 transitions, 1903 flow. Second operand 10 states and 208 transitions. [2024-06-27 20:18:38,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 272 transitions, 2869 flow [2024-06-27 20:18:39,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 272 transitions, 2779 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-27 20:18:39,292 INFO L231 Difference]: Finished difference. Result has 201 places, 223 transitions, 1915 flow [2024-06-27 20:18:39,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1815, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1915, PETRI_PLACES=201, PETRI_TRANSITIONS=223} [2024-06-27 20:18:39,292 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 156 predicate places. [2024-06-27 20:18:39,292 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 223 transitions, 1915 flow [2024-06-27 20:18:39,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:39,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:39,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:39,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 20:18:39,293 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:39,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:39,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1865769076, now seen corresponding path program 4 times [2024-06-27 20:18:39,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:39,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646038799] [2024-06-27 20:18:39,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:39,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:39,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:40,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:40,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:40,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646038799] [2024-06-27 20:18:40,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646038799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:40,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:40,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:18:40,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971569877] [2024-06-27 20:18:40,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:40,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:18:40,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:40,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:18:40,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:18:40,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:40,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 223 transitions, 1915 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:40,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:40,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:40,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:41,569 INFO L124 PetriNetUnfolderBase]: 2726/4310 cut-off events. [2024-06-27 20:18:41,569 INFO L125 PetriNetUnfolderBase]: For 660852/660852 co-relation queries the response was YES. [2024-06-27 20:18:41,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40036 conditions, 4310 events. 2726/4310 cut-off events. For 660852/660852 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 24051 event pairs, 711 based on Foata normal form. 20/4327 useless extension candidates. Maximal degree in co-relation 39941. Up to 3842 conditions per place. [2024-06-27 20:18:41,618 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 232 selfloop transitions, 21 changer transitions 0/266 dead transitions. [2024-06-27 20:18:41,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 266 transitions, 2561 flow [2024-06-27 20:18:41,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:18:41,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:18:41,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-27 20:18:41,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590909090909091 [2024-06-27 20:18:41,619 INFO L175 Difference]: Start difference. First operand has 201 places, 223 transitions, 1915 flow. Second operand 10 states and 202 transitions. [2024-06-27 20:18:41,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 266 transitions, 2561 flow [2024-06-27 20:18:42,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 266 transitions, 2454 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-27 20:18:42,017 INFO L231 Difference]: Finished difference. Result has 203 places, 223 transitions, 1857 flow [2024-06-27 20:18:42,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1808, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1857, PETRI_PLACES=203, PETRI_TRANSITIONS=223} [2024-06-27 20:18:42,017 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 158 predicate places. [2024-06-27 20:18:42,018 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 223 transitions, 1857 flow [2024-06-27 20:18:42,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:42,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:42,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:42,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 20:18:42,018 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:42,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:42,019 INFO L85 PathProgramCache]: Analyzing trace with hash 2090408024, now seen corresponding path program 5 times [2024-06-27 20:18:42,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:42,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419894131] [2024-06-27 20:18:42,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:42,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:42,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:43,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:43,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:43,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419894131] [2024-06-27 20:18:43,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419894131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:43,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:43,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:18:43,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014143126] [2024-06-27 20:18:43,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:43,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:18:43,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:43,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:18:43,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:18:43,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:43,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 223 transitions, 1857 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:43,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:43,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:43,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:44,424 INFO L124 PetriNetUnfolderBase]: 2801/4444 cut-off events. [2024-06-27 20:18:44,424 INFO L125 PetriNetUnfolderBase]: For 676404/676407 co-relation queries the response was YES. [2024-06-27 20:18:44,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40726 conditions, 4444 events. 2801/4444 cut-off events. For 676404/676407 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 25116 event pairs, 681 based on Foata normal form. 20/4460 useless extension candidates. Maximal degree in co-relation 40630. Up to 3564 conditions per place. [2024-06-27 20:18:44,473 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 168 selfloop transitions, 86 changer transitions 0/267 dead transitions. [2024-06-27 20:18:44,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 267 transitions, 2563 flow [2024-06-27 20:18:44,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:18:44,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:18:44,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-06-27 20:18:44,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4863636363636364 [2024-06-27 20:18:44,475 INFO L175 Difference]: Start difference. First operand has 203 places, 223 transitions, 1857 flow. Second operand 10 states and 214 transitions. [2024-06-27 20:18:44,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 267 transitions, 2563 flow [2024-06-27 20:18:45,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 267 transitions, 2516 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-27 20:18:45,047 INFO L231 Difference]: Finished difference. Result has 204 places, 224 transitions, 2045 flow [2024-06-27 20:18:45,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1810, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2045, PETRI_PLACES=204, PETRI_TRANSITIONS=224} [2024-06-27 20:18:45,047 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 159 predicate places. [2024-06-27 20:18:45,047 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 224 transitions, 2045 flow [2024-06-27 20:18:45,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:45,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:45,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:45,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 20:18:45,048 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:45,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:45,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1655488920, now seen corresponding path program 6 times [2024-06-27 20:18:45,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:45,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712472550] [2024-06-27 20:18:45,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:45,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:45,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:46,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:46,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:46,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712472550] [2024-06-27 20:18:46,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712472550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:46,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:46,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:18:46,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163842085] [2024-06-27 20:18:46,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:46,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:18:46,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:46,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:18:46,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:18:46,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:46,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 224 transitions, 2045 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:46,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:46,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:46,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:47,285 INFO L124 PetriNetUnfolderBase]: 2970/4733 cut-off events. [2024-06-27 20:18:47,285 INFO L125 PetriNetUnfolderBase]: For 741139/741142 co-relation queries the response was YES. [2024-06-27 20:18:47,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44687 conditions, 4733 events. 2970/4733 cut-off events. For 741139/741142 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 27362 event pairs, 709 based on Foata normal form. 16/4745 useless extension candidates. Maximal degree in co-relation 44590. Up to 3567 conditions per place. [2024-06-27 20:18:47,337 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 172 selfloop transitions, 89 changer transitions 0/274 dead transitions. [2024-06-27 20:18:47,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 274 transitions, 3089 flow [2024-06-27 20:18:47,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:18:47,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:18:47,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-27 20:18:47,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4954545454545455 [2024-06-27 20:18:47,339 INFO L175 Difference]: Start difference. First operand has 204 places, 224 transitions, 2045 flow. Second operand 10 states and 218 transitions. [2024-06-27 20:18:47,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 274 transitions, 3089 flow [2024-06-27 20:18:48,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 274 transitions, 2886 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-27 20:18:48,033 INFO L231 Difference]: Finished difference. Result has 206 places, 226 transitions, 2140 flow [2024-06-27 20:18:48,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1842, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2140, PETRI_PLACES=206, PETRI_TRANSITIONS=226} [2024-06-27 20:18:48,034 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 161 predicate places. [2024-06-27 20:18:48,034 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 226 transitions, 2140 flow [2024-06-27 20:18:48,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:48,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:48,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:48,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 20:18:48,034 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:48,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:48,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1693873832, now seen corresponding path program 7 times [2024-06-27 20:18:48,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:48,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70672982] [2024-06-27 20:18:48,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:48,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:48,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:48,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:48,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:48,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70672982] [2024-06-27 20:18:48,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70672982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:48,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:48,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:18:48,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143865009] [2024-06-27 20:18:48,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:48,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:18:48,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:48,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:18:48,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:18:49,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:49,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 226 transitions, 2140 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:49,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:49,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:49,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:50,282 INFO L124 PetriNetUnfolderBase]: 2934/4672 cut-off events. [2024-06-27 20:18:50,282 INFO L125 PetriNetUnfolderBase]: For 723844/723847 co-relation queries the response was YES. [2024-06-27 20:18:50,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43027 conditions, 4672 events. 2934/4672 cut-off events. For 723844/723847 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 26953 event pairs, 706 based on Foata normal form. 20/4688 useless extension candidates. Maximal degree in co-relation 42929. Up to 3787 conditions per place. [2024-06-27 20:18:50,334 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 167 selfloop transitions, 88 changer transitions 0/268 dead transitions. [2024-06-27 20:18:50,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 268 transitions, 2790 flow [2024-06-27 20:18:50,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:18:50,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:18:50,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-27 20:18:50,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-06-27 20:18:50,336 INFO L175 Difference]: Start difference. First operand has 206 places, 226 transitions, 2140 flow. Second operand 10 states and 212 transitions. [2024-06-27 20:18:50,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 268 transitions, 2790 flow [2024-06-27 20:18:50,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 268 transitions, 2615 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-27 20:18:50,963 INFO L231 Difference]: Finished difference. Result has 210 places, 226 transitions, 2148 flow [2024-06-27 20:18:50,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1965, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2148, PETRI_PLACES=210, PETRI_TRANSITIONS=226} [2024-06-27 20:18:50,963 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 165 predicate places. [2024-06-27 20:18:50,964 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 226 transitions, 2148 flow [2024-06-27 20:18:50,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:50,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:50,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:50,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 20:18:50,964 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:50,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:50,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1242673616, now seen corresponding path program 8 times [2024-06-27 20:18:50,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:50,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181168062] [2024-06-27 20:18:50,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:50,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:50,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:51,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:51,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:51,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181168062] [2024-06-27 20:18:51,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181168062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:51,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:51,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:18:51,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596158700] [2024-06-27 20:18:51,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:51,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:18:51,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:51,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:18:51,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:18:52,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:52,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 226 transitions, 2148 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:52,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:52,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:52,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:53,282 INFO L124 PetriNetUnfolderBase]: 3009/4812 cut-off events. [2024-06-27 20:18:53,282 INFO L125 PetriNetUnfolderBase]: For 739636/739639 co-relation queries the response was YES. [2024-06-27 20:18:53,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43985 conditions, 4812 events. 3009/4812 cut-off events. For 739636/739639 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 28098 event pairs, 735 based on Foata normal form. 20/4828 useless extension candidates. Maximal degree in co-relation 43885. Up to 3912 conditions per place. [2024-06-27 20:18:53,332 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 172 selfloop transitions, 85 changer transitions 0/270 dead transitions. [2024-06-27 20:18:53,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 270 transitions, 2864 flow [2024-06-27 20:18:53,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:18:53,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:18:53,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-27 20:18:53,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48863636363636365 [2024-06-27 20:18:53,334 INFO L175 Difference]: Start difference. First operand has 210 places, 226 transitions, 2148 flow. Second operand 10 states and 215 transitions. [2024-06-27 20:18:53,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 270 transitions, 2864 flow [2024-06-27 20:18:53,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 270 transitions, 2678 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 20:18:53,928 INFO L231 Difference]: Finished difference. Result has 211 places, 227 transitions, 2199 flow [2024-06-27 20:18:53,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1962, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2199, PETRI_PLACES=211, PETRI_TRANSITIONS=227} [2024-06-27 20:18:53,929 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 166 predicate places. [2024-06-27 20:18:53,929 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 227 transitions, 2199 flow [2024-06-27 20:18:53,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:53,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:53,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:53,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 20:18:53,930 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:53,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:53,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1197396974, now seen corresponding path program 9 times [2024-06-27 20:18:53,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:53,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323246960] [2024-06-27 20:18:53,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:53,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:53,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:54,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:54,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:54,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323246960] [2024-06-27 20:18:54,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323246960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:54,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:54,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:18:54,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622988861] [2024-06-27 20:18:54,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:54,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:18:54,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:54,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:18:54,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:18:55,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:55,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 227 transitions, 2199 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:55,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:55,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:55,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:56,238 INFO L124 PetriNetUnfolderBase]: 3067/4915 cut-off events. [2024-06-27 20:18:56,238 INFO L125 PetriNetUnfolderBase]: For 757299/757302 co-relation queries the response was YES. [2024-06-27 20:18:56,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44956 conditions, 4915 events. 3067/4915 cut-off events. For 757299/757302 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 28859 event pairs, 730 based on Foata normal form. 16/4927 useless extension candidates. Maximal degree in co-relation 44855. Up to 3900 conditions per place. [2024-06-27 20:18:56,293 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 175 selfloop transitions, 87 changer transitions 0/275 dead transitions. [2024-06-27 20:18:56,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 275 transitions, 2945 flow [2024-06-27 20:18:56,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:18:56,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:18:56,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-27 20:18:56,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49772727272727274 [2024-06-27 20:18:56,294 INFO L175 Difference]: Start difference. First operand has 211 places, 227 transitions, 2199 flow. Second operand 10 states and 219 transitions. [2024-06-27 20:18:56,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 275 transitions, 2945 flow [2024-06-27 20:18:56,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 275 transitions, 2740 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-27 20:18:56,965 INFO L231 Difference]: Finished difference. Result has 213 places, 228 transitions, 2236 flow [2024-06-27 20:18:56,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1994, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2236, PETRI_PLACES=213, PETRI_TRANSITIONS=228} [2024-06-27 20:18:56,966 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 168 predicate places. [2024-06-27 20:18:56,966 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 228 transitions, 2236 flow [2024-06-27 20:18:56,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:56,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:56,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:56,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 20:18:56,967 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:56,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:56,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1919585624, now seen corresponding path program 10 times [2024-06-27 20:18:56,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:56,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842759510] [2024-06-27 20:18:56,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:56,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:56,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:57,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:57,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:57,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842759510] [2024-06-27 20:18:57,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842759510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:57,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:57,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:18:57,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638845851] [2024-06-27 20:18:57,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:57,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:18:57,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:57,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:18:57,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:18:58,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:58,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 228 transitions, 2236 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:58,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:58,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:58,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:59,239 INFO L124 PetriNetUnfolderBase]: 3125/5013 cut-off events. [2024-06-27 20:18:59,239 INFO L125 PetriNetUnfolderBase]: For 777836/777839 co-relation queries the response was YES. [2024-06-27 20:18:59,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45669 conditions, 5013 events. 3125/5013 cut-off events. For 777836/777839 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 29623 event pairs, 731 based on Foata normal form. 16/5025 useless extension candidates. Maximal degree in co-relation 45567. Up to 3515 conditions per place. [2024-06-27 20:18:59,293 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 169 selfloop transitions, 94 changer transitions 0/276 dead transitions. [2024-06-27 20:18:59,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 276 transitions, 2984 flow [2024-06-27 20:18:59,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:18:59,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:18:59,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-27 20:18:59,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4954545454545455 [2024-06-27 20:18:59,295 INFO L175 Difference]: Start difference. First operand has 213 places, 228 transitions, 2236 flow. Second operand 10 states and 218 transitions. [2024-06-27 20:18:59,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 276 transitions, 2984 flow [2024-06-27 20:18:59,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 276 transitions, 2762 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-27 20:18:59,925 INFO L231 Difference]: Finished difference. Result has 215 places, 229 transitions, 2272 flow [2024-06-27 20:18:59,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2014, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2272, PETRI_PLACES=215, PETRI_TRANSITIONS=229} [2024-06-27 20:18:59,926 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 170 predicate places. [2024-06-27 20:18:59,926 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 229 transitions, 2272 flow [2024-06-27 20:18:59,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:59,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:59,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:59,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 20:18:59,927 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:59,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:59,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1133321847, now seen corresponding path program 1 times [2024-06-27 20:18:59,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:59,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105450103] [2024-06-27 20:18:59,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:59,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:59,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:00,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:00,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:00,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105450103] [2024-06-27 20:19:00,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105450103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:00,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:00,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:19:00,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478794087] [2024-06-27 20:19:00,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:00,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:19:00,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:00,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:19:00,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:19:00,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:19:00,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 229 transitions, 2272 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:00,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:00,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:19:00,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:01,659 INFO L124 PetriNetUnfolderBase]: 2942/4802 cut-off events. [2024-06-27 20:19:01,660 INFO L125 PetriNetUnfolderBase]: For 754740/754743 co-relation queries the response was YES. [2024-06-27 20:19:01,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44329 conditions, 4802 events. 2942/4802 cut-off events. For 754740/754743 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 29123 event pairs, 810 based on Foata normal form. 3/4765 useless extension candidates. Maximal degree in co-relation 44226. Up to 4293 conditions per place. [2024-06-27 20:19:01,714 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 195 selfloop transitions, 19 changer transitions 0/251 dead transitions. [2024-06-27 20:19:01,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 251 transitions, 2798 flow [2024-06-27 20:19:01,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:19:01,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:19:01,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-27 20:19:01,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4707792207792208 [2024-06-27 20:19:01,715 INFO L175 Difference]: Start difference. First operand has 215 places, 229 transitions, 2272 flow. Second operand 7 states and 145 transitions. [2024-06-27 20:19:01,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 251 transitions, 2798 flow [2024-06-27 20:19:02,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 251 transitions, 2560 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-27 20:19:02,349 INFO L231 Difference]: Finished difference. Result has 214 places, 232 transitions, 2134 flow [2024-06-27 20:19:02,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2034, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2134, PETRI_PLACES=214, PETRI_TRANSITIONS=232} [2024-06-27 20:19:02,349 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 169 predicate places. [2024-06-27 20:19:02,350 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 232 transitions, 2134 flow [2024-06-27 20:19:02,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:02,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:02,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:02,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 20:19:02,350 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:02,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:02,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1140940407, now seen corresponding path program 2 times [2024-06-27 20:19:02,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:02,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661314282] [2024-06-27 20:19:02,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:02,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:02,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:03,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:03,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:03,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661314282] [2024-06-27 20:19:03,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661314282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:03,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:03,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:19:03,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906967972] [2024-06-27 20:19:03,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:03,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:19:03,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:03,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:19:03,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:19:03,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:19:03,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 232 transitions, 2134 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:03,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:03,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:19:03,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:04,134 INFO L124 PetriNetUnfolderBase]: 2955/4820 cut-off events. [2024-06-27 20:19:04,134 INFO L125 PetriNetUnfolderBase]: For 767504/767507 co-relation queries the response was YES. [2024-06-27 20:19:04,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44290 conditions, 4820 events. 2955/4820 cut-off events. For 767504/767507 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 29209 event pairs, 810 based on Foata normal form. 3/4783 useless extension candidates. Maximal degree in co-relation 44186. Up to 4301 conditions per place. [2024-06-27 20:19:04,185 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 194 selfloop transitions, 26 changer transitions 0/257 dead transitions. [2024-06-27 20:19:04,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 257 transitions, 2891 flow [2024-06-27 20:19:04,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:19:04,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:19:04,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-27 20:19:04,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2024-06-27 20:19:04,187 INFO L175 Difference]: Start difference. First operand has 214 places, 232 transitions, 2134 flow. Second operand 7 states and 144 transitions. [2024-06-27 20:19:04,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 257 transitions, 2891 flow [2024-06-27 20:19:04,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 257 transitions, 2813 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 20:19:04,882 INFO L231 Difference]: Finished difference. Result has 217 places, 240 transitions, 2258 flow [2024-06-27 20:19:04,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2056, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2258, PETRI_PLACES=217, PETRI_TRANSITIONS=240} [2024-06-27 20:19:04,883 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 172 predicate places. [2024-06-27 20:19:04,883 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 240 transitions, 2258 flow [2024-06-27 20:19:04,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:04,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:04,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:04,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 20:19:04,884 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:04,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:04,884 INFO L85 PathProgramCache]: Analyzing trace with hash 2097083378, now seen corresponding path program 1 times [2024-06-27 20:19:04,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:04,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582364574] [2024-06-27 20:19:04,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:04,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:04,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:06,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:06,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:06,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582364574] [2024-06-27 20:19:06,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582364574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:06,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:06,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:19:06,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921187643] [2024-06-27 20:19:06,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:06,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:19:06,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:06,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:19:06,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:19:06,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:19:06,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 240 transitions, 2258 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:06,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:06,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:19:06,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:07,330 INFO L124 PetriNetUnfolderBase]: 3163/5068 cut-off events. [2024-06-27 20:19:07,330 INFO L125 PetriNetUnfolderBase]: For 803244/803247 co-relation queries the response was YES. [2024-06-27 20:19:07,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46536 conditions, 5068 events. 3163/5068 cut-off events. For 803244/803247 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 29963 event pairs, 796 based on Foata normal form. 4/5068 useless extension candidates. Maximal degree in co-relation 46430. Up to 4561 conditions per place. [2024-06-27 20:19:07,386 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 223 selfloop transitions, 45 changer transitions 0/281 dead transitions. [2024-06-27 20:19:07,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 281 transitions, 2980 flow [2024-06-27 20:19:07,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:19:07,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:19:07,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-27 20:19:07,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46136363636363636 [2024-06-27 20:19:07,387 INFO L175 Difference]: Start difference. First operand has 217 places, 240 transitions, 2258 flow. Second operand 10 states and 203 transitions. [2024-06-27 20:19:07,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 281 transitions, 2980 flow [2024-06-27 20:19:07,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 281 transitions, 2898 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-27 20:19:07,992 INFO L231 Difference]: Finished difference. Result has 225 places, 245 transitions, 2377 flow [2024-06-27 20:19:07,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2176, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2377, PETRI_PLACES=225, PETRI_TRANSITIONS=245} [2024-06-27 20:19:07,995 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 180 predicate places. [2024-06-27 20:19:07,996 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 245 transitions, 2377 flow [2024-06-27 20:19:07,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:07,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:07,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:07,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 20:19:07,996 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:07,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:07,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1360782309, now seen corresponding path program 1 times [2024-06-27 20:19:07,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:07,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697416412] [2024-06-27 20:19:07,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:07,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:08,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:09,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:09,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:09,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697416412] [2024-06-27 20:19:09,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697416412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:09,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:09,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:19:09,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953510154] [2024-06-27 20:19:09,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:09,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:19:09,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:09,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:19:09,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:19:09,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:19:09,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 245 transitions, 2377 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:09,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:09,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:19:09,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:10,065 INFO L124 PetriNetUnfolderBase]: 2903/4763 cut-off events. [2024-06-27 20:19:10,065 INFO L125 PetriNetUnfolderBase]: For 807619/807625 co-relation queries the response was YES. [2024-06-27 20:19:10,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45399 conditions, 4763 events. 2903/4763 cut-off events. For 807619/807625 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 29018 event pairs, 793 based on Foata normal form. 2/4702 useless extension candidates. Maximal degree in co-relation 45290. Up to 4211 conditions per place. [2024-06-27 20:19:10,122 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 199 selfloop transitions, 21 changer transitions 0/265 dead transitions. [2024-06-27 20:19:10,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 265 transitions, 2907 flow [2024-06-27 20:19:10,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:19:10,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:19:10,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 20:19:10,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-27 20:19:10,123 INFO L175 Difference]: Start difference. First operand has 225 places, 245 transitions, 2377 flow. Second operand 8 states and 156 transitions. [2024-06-27 20:19:10,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 265 transitions, 2907 flow [2024-06-27 20:19:10,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 265 transitions, 2748 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-27 20:19:10,785 INFO L231 Difference]: Finished difference. Result has 226 places, 248 transitions, 2320 flow [2024-06-27 20:19:10,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2218, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2320, PETRI_PLACES=226, PETRI_TRANSITIONS=248} [2024-06-27 20:19:10,785 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 181 predicate places. [2024-06-27 20:19:10,785 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 248 transitions, 2320 flow [2024-06-27 20:19:10,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:10,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:10,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:10,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 20:19:10,786 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:10,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:10,786 INFO L85 PathProgramCache]: Analyzing trace with hash -111540904, now seen corresponding path program 11 times [2024-06-27 20:19:10,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:10,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991586474] [2024-06-27 20:19:10,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:10,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:10,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:11,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:11,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:11,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991586474] [2024-06-27 20:19:11,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991586474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:11,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:11,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:19:11,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218469393] [2024-06-27 20:19:11,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:11,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:19:11,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:11,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:19:11,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:19:12,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:19:12,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 248 transitions, 2320 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:12,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:12,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:19:12,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:13,439 INFO L124 PetriNetUnfolderBase]: 3244/5216 cut-off events. [2024-06-27 20:19:13,439 INFO L125 PetriNetUnfolderBase]: For 886815/886818 co-relation queries the response was YES. [2024-06-27 20:19:13,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48914 conditions, 5216 events. 3244/5216 cut-off events. For 886815/886818 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 31072 event pairs, 761 based on Foata normal form. 20/5229 useless extension candidates. Maximal degree in co-relation 48804. Up to 4298 conditions per place. [2024-06-27 20:19:13,499 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 187 selfloop transitions, 89 changer transitions 0/289 dead transitions. [2024-06-27 20:19:13,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 289 transitions, 3086 flow [2024-06-27 20:19:13,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:19:13,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:19:13,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-27 20:19:13,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-27 20:19:13,501 INFO L175 Difference]: Start difference. First operand has 226 places, 248 transitions, 2320 flow. Second operand 10 states and 209 transitions. [2024-06-27 20:19:13,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 289 transitions, 3086 flow [2024-06-27 20:19:14,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 289 transitions, 3006 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 20:19:14,255 INFO L231 Difference]: Finished difference. Result has 230 places, 249 transitions, 2493 flow [2024-06-27 20:19:14,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2240, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2493, PETRI_PLACES=230, PETRI_TRANSITIONS=249} [2024-06-27 20:19:14,256 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 185 predicate places. [2024-06-27 20:19:14,256 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 249 transitions, 2493 flow [2024-06-27 20:19:14,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:14,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:14,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:14,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 20:19:14,257 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:14,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:14,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1507913808, now seen corresponding path program 12 times [2024-06-27 20:19:14,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:14,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757525794] [2024-06-27 20:19:14,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:14,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:14,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:15,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:15,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:15,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757525794] [2024-06-27 20:19:15,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757525794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:15,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:15,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:19:15,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209304100] [2024-06-27 20:19:15,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:15,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:19:15,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:15,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:19:15,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:19:15,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:19:15,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 249 transitions, 2493 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:15,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:15,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:19:15,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:16,615 INFO L124 PetriNetUnfolderBase]: 3302/5314 cut-off events. [2024-06-27 20:19:16,615 INFO L125 PetriNetUnfolderBase]: For 907944/907947 co-relation queries the response was YES. [2024-06-27 20:19:16,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50341 conditions, 5314 events. 3302/5314 cut-off events. For 907944/907947 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 31777 event pairs, 747 based on Foata normal form. 16/5323 useless extension candidates. Maximal degree in co-relation 50230. Up to 4286 conditions per place. [2024-06-27 20:19:16,677 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 190 selfloop transitions, 91 changer transitions 0/294 dead transitions. [2024-06-27 20:19:16,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 294 transitions, 3291 flow [2024-06-27 20:19:16,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:19:16,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:19:16,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-27 20:19:16,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48409090909090907 [2024-06-27 20:19:16,679 INFO L175 Difference]: Start difference. First operand has 230 places, 249 transitions, 2493 flow. Second operand 10 states and 213 transitions. [2024-06-27 20:19:16,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 294 transitions, 3291 flow [2024-06-27 20:19:17,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 294 transitions, 3070 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-27 20:19:17,409 INFO L231 Difference]: Finished difference. Result has 232 places, 250 transitions, 2530 flow [2024-06-27 20:19:17,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2272, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2530, PETRI_PLACES=232, PETRI_TRANSITIONS=250} [2024-06-27 20:19:17,409 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 187 predicate places. [2024-06-27 20:19:17,410 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 250 transitions, 2530 flow [2024-06-27 20:19:17,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:17,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:17,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:17,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 20:19:17,410 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:17,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:17,411 INFO L85 PathProgramCache]: Analyzing trace with hash 693510308, now seen corresponding path program 13 times [2024-06-27 20:19:17,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:17,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934370655] [2024-06-27 20:19:17,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:17,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:18,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:18,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:18,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934370655] [2024-06-27 20:19:18,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934370655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:18,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:18,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:19:18,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395858505] [2024-06-27 20:19:18,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:18,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:19:18,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:18,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:19:18,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:19:18,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:19:18,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 250 transitions, 2530 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:18,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:18,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:19:18,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:20,077 INFO L124 PetriNetUnfolderBase]: 3377/5444 cut-off events. [2024-06-27 20:19:20,077 INFO L125 PetriNetUnfolderBase]: For 943683/943686 co-relation queries the response was YES. [2024-06-27 20:19:20,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51368 conditions, 5444 events. 3377/5444 cut-off events. For 943683/943686 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 32935 event pairs, 782 based on Foata normal form. 20/5457 useless extension candidates. Maximal degree in co-relation 51256. Up to 4521 conditions per place. [2024-06-27 20:19:20,141 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 188 selfloop transitions, 90 changer transitions 0/291 dead transitions. [2024-06-27 20:19:20,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 291 transitions, 3304 flow [2024-06-27 20:19:20,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:19:20,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:19:20,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-27 20:19:20,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4727272727272727 [2024-06-27 20:19:20,143 INFO L175 Difference]: Start difference. First operand has 232 places, 250 transitions, 2530 flow. Second operand 10 states and 208 transitions. [2024-06-27 20:19:20,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 291 transitions, 3304 flow [2024-06-27 20:19:21,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 291 transitions, 3066 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-27 20:19:21,122 INFO L231 Difference]: Finished difference. Result has 234 places, 251 transitions, 2551 flow [2024-06-27 20:19:21,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2292, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2551, PETRI_PLACES=234, PETRI_TRANSITIONS=251} [2024-06-27 20:19:21,122 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 189 predicate places. [2024-06-27 20:19:21,123 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 251 transitions, 2551 flow [2024-06-27 20:19:21,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:21,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:21,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:21,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 20:19:21,123 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:21,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:21,124 INFO L85 PathProgramCache]: Analyzing trace with hash 61347636, now seen corresponding path program 14 times [2024-06-27 20:19:21,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:21,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133316934] [2024-06-27 20:19:21,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:21,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:21,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:22,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:22,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:22,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133316934] [2024-06-27 20:19:22,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133316934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:22,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:22,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:19:22,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990673664] [2024-06-27 20:19:22,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:22,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:19:22,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:22,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:19:22,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:19:22,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:19:22,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 251 transitions, 2551 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:22,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:22,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:19:22,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:23,526 INFO L124 PetriNetUnfolderBase]: 3452/5579 cut-off events. [2024-06-27 20:19:23,526 INFO L125 PetriNetUnfolderBase]: For 970908/970911 co-relation queries the response was YES. [2024-06-27 20:19:23,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52365 conditions, 5579 events. 3452/5579 cut-off events. For 970908/970911 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 34015 event pairs, 811 based on Foata normal form. 20/5592 useless extension candidates. Maximal degree in co-relation 52252. Up to 4646 conditions per place. [2024-06-27 20:19:23,592 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 182 selfloop transitions, 96 changer transitions 0/291 dead transitions. [2024-06-27 20:19:23,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 291 transitions, 3321 flow [2024-06-27 20:19:23,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:19:23,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:19:23,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-27 20:19:23,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-06-27 20:19:23,595 INFO L175 Difference]: Start difference. First operand has 234 places, 251 transitions, 2551 flow. Second operand 10 states and 206 transitions. [2024-06-27 20:19:23,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 291 transitions, 3321 flow [2024-06-27 20:19:24,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 291 transitions, 3094 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-27 20:19:24,532 INFO L231 Difference]: Finished difference. Result has 236 places, 252 transitions, 2597 flow [2024-06-27 20:19:24,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2324, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2597, PETRI_PLACES=236, PETRI_TRANSITIONS=252} [2024-06-27 20:19:24,532 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 191 predicate places. [2024-06-27 20:19:24,533 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 252 transitions, 2597 flow [2024-06-27 20:19:24,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:24,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:24,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:24,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 20:19:24,533 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:24,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:24,534 INFO L85 PathProgramCache]: Analyzing trace with hash -2109963850, now seen corresponding path program 15 times [2024-06-27 20:19:24,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:24,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497327800] [2024-06-27 20:19:24,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:24,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:24,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:25,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:25,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:25,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497327800] [2024-06-27 20:19:25,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497327800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:25,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:25,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:19:25,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567884078] [2024-06-27 20:19:25,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:25,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:19:25,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:25,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:19:25,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:19:25,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:19:25,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 252 transitions, 2597 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:25,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:25,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:19:25,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:26,932 INFO L124 PetriNetUnfolderBase]: 3571/5775 cut-off events. [2024-06-27 20:19:26,932 INFO L125 PetriNetUnfolderBase]: For 1023953/1023956 co-relation queries the response was YES. [2024-06-27 20:19:26,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54980 conditions, 5775 events. 3571/5775 cut-off events. For 1023953/1023956 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 35485 event pairs, 806 based on Foata normal form. 16/5784 useless extension candidates. Maximal degree in co-relation 54866. Up to 4112 conditions per place. [2024-06-27 20:19:26,999 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 188 selfloop transitions, 99 changer transitions 0/300 dead transitions. [2024-06-27 20:19:26,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 300 transitions, 3781 flow [2024-06-27 20:19:27,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:19:27,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:19:27,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-06-27 20:19:27,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4863636363636364 [2024-06-27 20:19:27,001 INFO L175 Difference]: Start difference. First operand has 236 places, 252 transitions, 2597 flow. Second operand 10 states and 214 transitions. [2024-06-27 20:19:27,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 300 transitions, 3781 flow [2024-06-27 20:19:27,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 300 transitions, 3540 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-27 20:19:27,903 INFO L231 Difference]: Finished difference. Result has 238 places, 254 transitions, 2710 flow [2024-06-27 20:19:27,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2356, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2710, PETRI_PLACES=238, PETRI_TRANSITIONS=254} [2024-06-27 20:19:27,903 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 193 predicate places. [2024-06-27 20:19:27,903 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 254 transitions, 2710 flow [2024-06-27 20:19:27,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:27,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:27,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:27,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 20:19:27,904 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:27,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:27,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1141548212, now seen corresponding path program 16 times [2024-06-27 20:19:27,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:27,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956586564] [2024-06-27 20:19:27,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:27,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:27,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:28,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:28,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:28,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956586564] [2024-06-27 20:19:28,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956586564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:28,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:28,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:19:28,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154194011] [2024-06-27 20:19:28,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:28,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:19:28,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:28,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:19:28,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:19:29,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:19:29,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 254 transitions, 2710 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:29,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:29,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:19:29,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:30,492 INFO L124 PetriNetUnfolderBase]: 3646/5900 cut-off events. [2024-06-27 20:19:30,493 INFO L125 PetriNetUnfolderBase]: For 1062958/1062961 co-relation queries the response was YES. [2024-06-27 20:19:30,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56084 conditions, 5900 events. 3646/5900 cut-off events. For 1062958/1062961 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 36504 event pairs, 846 based on Foata normal form. 20/5913 useless extension candidates. Maximal degree in co-relation 55969. Up to 4972 conditions per place. [2024-06-27 20:19:30,560 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 197 selfloop transitions, 86 changer transitions 0/296 dead transitions. [2024-06-27 20:19:30,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 296 transitions, 3506 flow [2024-06-27 20:19:30,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:19:30,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:19:30,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-27 20:19:30,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-06-27 20:19:30,562 INFO L175 Difference]: Start difference. First operand has 238 places, 254 transitions, 2710 flow. Second operand 10 states and 212 transitions. [2024-06-27 20:19:30,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 296 transitions, 3506 flow [2024-06-27 20:19:31,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 296 transitions, 3315 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-27 20:19:31,476 INFO L231 Difference]: Finished difference. Result has 242 places, 255 transitions, 2776 flow [2024-06-27 20:19:31,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2531, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2776, PETRI_PLACES=242, PETRI_TRANSITIONS=255} [2024-06-27 20:19:31,477 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 197 predicate places. [2024-06-27 20:19:31,477 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 255 transitions, 2776 flow [2024-06-27 20:19:31,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:31,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:31,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:31,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 20:19:31,477 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:31,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:31,478 INFO L85 PathProgramCache]: Analyzing trace with hash 699766418, now seen corresponding path program 17 times [2024-06-27 20:19:31,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:31,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89102264] [2024-06-27 20:19:31,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:31,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:31,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:32,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:32,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:32,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89102264] [2024-06-27 20:19:32,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89102264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:32,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:32,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:19:32,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537892415] [2024-06-27 20:19:32,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:32,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:19:32,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:32,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:19:32,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:19:32,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:19:32,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 255 transitions, 2776 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:32,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:32,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:19:32,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:34,006 INFO L124 PetriNetUnfolderBase]: 3721/6035 cut-off events. [2024-06-27 20:19:34,006 INFO L125 PetriNetUnfolderBase]: For 1080021/1080024 co-relation queries the response was YES. [2024-06-27 20:19:34,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57016 conditions, 6035 events. 3721/6035 cut-off events. For 1080021/1080024 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 37687 event pairs, 870 based on Foata normal form. 20/6048 useless extension candidates. Maximal degree in co-relation 56899. Up to 5097 conditions per place. [2024-06-27 20:19:34,078 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 194 selfloop transitions, 89 changer transitions 0/296 dead transitions. [2024-06-27 20:19:34,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 296 transitions, 3556 flow [2024-06-27 20:19:34,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:19:34,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:19:34,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-27 20:19:34,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-27 20:19:34,079 INFO L175 Difference]: Start difference. First operand has 242 places, 255 transitions, 2776 flow. Second operand 10 states and 209 transitions. [2024-06-27 20:19:34,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 296 transitions, 3556 flow [2024-06-27 20:19:35,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 296 transitions, 3345 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-27 20:19:35,125 INFO L231 Difference]: Finished difference. Result has 244 places, 256 transitions, 2818 flow [2024-06-27 20:19:35,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2565, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2818, PETRI_PLACES=244, PETRI_TRANSITIONS=256} [2024-06-27 20:19:35,126 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 199 predicate places. [2024-06-27 20:19:35,126 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 256 transitions, 2818 flow [2024-06-27 20:19:35,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:35,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:35,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:35,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 20:19:35,126 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:35,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:35,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1771669660, now seen corresponding path program 18 times [2024-06-27 20:19:35,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:35,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147756927] [2024-06-27 20:19:35,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:35,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:36,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:36,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:36,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147756927] [2024-06-27 20:19:36,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147756927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:36,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:36,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:19:36,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288304539] [2024-06-27 20:19:36,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:36,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:19:36,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:36,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:19:36,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:19:36,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:19:36,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 256 transitions, 2818 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:36,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:36,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:19:36,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:37,657 INFO L124 PetriNetUnfolderBase]: 3779/6148 cut-off events. [2024-06-27 20:19:37,658 INFO L125 PetriNetUnfolderBase]: For 1093182/1093185 co-relation queries the response was YES. [2024-06-27 20:19:37,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57763 conditions, 6148 events. 3779/6148 cut-off events. For 1093182/1093185 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 38659 event pairs, 870 based on Foata normal form. 16/6157 useless extension candidates. Maximal degree in co-relation 57645. Up to 4845 conditions per place. [2024-06-27 20:19:37,730 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 193 selfloop transitions, 94 changer transitions 0/300 dead transitions. [2024-06-27 20:19:37,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 300 transitions, 3622 flow [2024-06-27 20:19:37,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:19:37,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:19:37,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-27 20:19:37,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 20:19:37,732 INFO L175 Difference]: Start difference. First operand has 244 places, 256 transitions, 2818 flow. Second operand 10 states and 210 transitions. [2024-06-27 20:19:37,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 300 transitions, 3622 flow [2024-06-27 20:19:38,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 300 transitions, 3403 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-27 20:19:38,885 INFO L231 Difference]: Finished difference. Result has 246 places, 257 transitions, 2863 flow [2024-06-27 20:19:38,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2599, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2863, PETRI_PLACES=246, PETRI_TRANSITIONS=257} [2024-06-27 20:19:38,885 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 201 predicate places. [2024-06-27 20:19:38,885 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 257 transitions, 2863 flow [2024-06-27 20:19:38,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:38,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:38,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:38,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 20:19:38,886 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:38,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:38,887 INFO L85 PathProgramCache]: Analyzing trace with hash 54515246, now seen corresponding path program 19 times [2024-06-27 20:19:38,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:38,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772487594] [2024-06-27 20:19:38,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:38,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:39,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:39,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:39,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772487594] [2024-06-27 20:19:39,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772487594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:39,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:39,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:19:39,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41494018] [2024-06-27 20:19:39,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:39,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:19:39,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:39,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:19:39,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:19:40,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:19:40,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 257 transitions, 2863 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:40,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:40,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:19:40,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:41,673 INFO L124 PetriNetUnfolderBase]: 3837/6241 cut-off events. [2024-06-27 20:19:41,673 INFO L125 PetriNetUnfolderBase]: For 1118384/1118387 co-relation queries the response was YES. [2024-06-27 20:19:41,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58542 conditions, 6241 events. 3837/6241 cut-off events. For 1118384/1118387 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 39346 event pairs, 876 based on Foata normal form. 16/6250 useless extension candidates. Maximal degree in co-relation 58423. Up to 5017 conditions per place. [2024-06-27 20:19:41,740 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 202 selfloop transitions, 89 changer transitions 0/304 dead transitions. [2024-06-27 20:19:41,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 304 transitions, 3997 flow [2024-06-27 20:19:41,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:19:41,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:19:41,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-27 20:19:41,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2024-06-27 20:19:41,742 INFO L175 Difference]: Start difference. First operand has 246 places, 257 transitions, 2863 flow. Second operand 10 states and 216 transitions. [2024-06-27 20:19:41,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 304 transitions, 3997 flow [2024-06-27 20:19:42,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 304 transitions, 3755 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-27 20:19:42,801 INFO L231 Difference]: Finished difference. Result has 248 places, 258 transitions, 2875 flow [2024-06-27 20:19:42,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2621, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2875, PETRI_PLACES=248, PETRI_TRANSITIONS=258} [2024-06-27 20:19:42,801 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 203 predicate places. [2024-06-27 20:19:42,801 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 258 transitions, 2875 flow [2024-06-27 20:19:42,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:42,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:42,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:42,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 20:19:42,802 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:42,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:42,802 INFO L85 PathProgramCache]: Analyzing trace with hash 60948986, now seen corresponding path program 20 times [2024-06-27 20:19:42,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:42,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461608121] [2024-06-27 20:19:42,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:42,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:42,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:43,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:43,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:43,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461608121] [2024-06-27 20:19:43,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461608121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:43,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:43,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:19:43,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660312323] [2024-06-27 20:19:43,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:43,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:19:43,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:43,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:19:43,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:19:43,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:19:43,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 258 transitions, 2875 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:43,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:43,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:19:43,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:45,500 INFO L124 PetriNetUnfolderBase]: 3801/6185 cut-off events. [2024-06-27 20:19:45,501 INFO L125 PetriNetUnfolderBase]: For 1084693/1084696 co-relation queries the response was YES. [2024-06-27 20:19:45,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56253 conditions, 6185 events. 3801/6185 cut-off events. For 1084693/1084696 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 39003 event pairs, 878 based on Foata normal form. 20/6198 useless extension candidates. Maximal degree in co-relation 56133. Up to 5237 conditions per place. [2024-06-27 20:19:45,572 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 198 selfloop transitions, 87 changer transitions 0/298 dead transitions. [2024-06-27 20:19:45,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 298 transitions, 3593 flow [2024-06-27 20:19:45,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:19:45,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:19:45,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-27 20:19:45,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 20:19:45,573 INFO L175 Difference]: Start difference. First operand has 248 places, 258 transitions, 2875 flow. Second operand 10 states and 210 transitions. [2024-06-27 20:19:45,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 298 transitions, 3593 flow [2024-06-27 20:19:46,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 298 transitions, 3294 flow, removed 51 selfloop flow, removed 8 redundant places. [2024-06-27 20:19:46,731 INFO L231 Difference]: Finished difference. Result has 250 places, 258 transitions, 2757 flow [2024-06-27 20:19:46,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2576, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2757, PETRI_PLACES=250, PETRI_TRANSITIONS=258} [2024-06-27 20:19:46,732 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 205 predicate places. [2024-06-27 20:19:46,732 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 258 transitions, 2757 flow [2024-06-27 20:19:46,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:46,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:46,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:46,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 20:19:46,733 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:46,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:46,733 INFO L85 PathProgramCache]: Analyzing trace with hash -172300965, now seen corresponding path program 3 times [2024-06-27 20:19:46,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:46,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103901245] [2024-06-27 20:19:46,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:46,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:46,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:47,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:47,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:47,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103901245] [2024-06-27 20:19:47,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103901245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:47,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:47,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:19:47,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837542716] [2024-06-27 20:19:47,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:47,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:19:47,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:47,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:19:47,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:19:47,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:19:47,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 258 transitions, 2757 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:47,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:47,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:19:47,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:48,597 INFO L124 PetriNetUnfolderBase]: 3583/5919 cut-off events. [2024-06-27 20:19:48,598 INFO L125 PetriNetUnfolderBase]: For 1020817/1020823 co-relation queries the response was YES. [2024-06-27 20:19:48,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53990 conditions, 5919 events. 3583/5919 cut-off events. For 1020817/1020823 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 38242 event pairs, 935 based on Foata normal form. 5/5847 useless extension candidates. Maximal degree in co-relation 53869. Up to 5359 conditions per place. [2024-06-27 20:19:48,670 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 219 selfloop transitions, 19 changer transitions 0/275 dead transitions. [2024-06-27 20:19:48,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 275 transitions, 3280 flow [2024-06-27 20:19:48,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:19:48,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:19:48,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-27 20:19:48,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.461038961038961 [2024-06-27 20:19:48,672 INFO L175 Difference]: Start difference. First operand has 250 places, 258 transitions, 2757 flow. Second operand 7 states and 142 transitions. [2024-06-27 20:19:48,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 275 transitions, 3280 flow [2024-06-27 20:19:49,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 275 transitions, 3068 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-27 20:19:49,659 INFO L231 Difference]: Finished difference. Result has 248 places, 259 transitions, 2598 flow [2024-06-27 20:19:49,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2545, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2598, PETRI_PLACES=248, PETRI_TRANSITIONS=259} [2024-06-27 20:19:49,660 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 203 predicate places. [2024-06-27 20:19:49,660 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 259 transitions, 2598 flow [2024-06-27 20:19:49,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:49,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:49,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:49,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 20:19:49,660 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:49,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:49,661 INFO L85 PathProgramCache]: Analyzing trace with hash -158968485, now seen corresponding path program 4 times [2024-06-27 20:19:49,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:49,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452074239] [2024-06-27 20:19:49,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:49,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:49,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:50,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:50,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:50,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452074239] [2024-06-27 20:19:50,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452074239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:50,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:50,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:19:50,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366068567] [2024-06-27 20:19:50,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:50,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:19:50,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:50,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:19:50,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:19:50,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:19:50,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 259 transitions, 2598 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:50,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:50,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:19:50,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:51,686 INFO L124 PetriNetUnfolderBase]: 3588/5926 cut-off events. [2024-06-27 20:19:51,687 INFO L125 PetriNetUnfolderBase]: For 1040891/1040897 co-relation queries the response was YES. [2024-06-27 20:19:51,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53873 conditions, 5926 events. 3588/5926 cut-off events. For 1040891/1040897 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 38237 event pairs, 935 based on Foata normal form. 5/5854 useless extension candidates. Maximal degree in co-relation 53751. Up to 5357 conditions per place. [2024-06-27 20:19:51,765 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 211 selfloop transitions, 27 changer transitions 0/275 dead transitions. [2024-06-27 20:19:51,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 275 transitions, 3170 flow [2024-06-27 20:19:51,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:19:51,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:19:51,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-27 20:19:51,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 20:19:51,766 INFO L175 Difference]: Start difference. First operand has 248 places, 259 transitions, 2598 flow. Second operand 7 states and 140 transitions. [2024-06-27 20:19:51,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 275 transitions, 3170 flow [2024-06-27 20:19:52,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 275 transitions, 3128 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 20:19:52,679 INFO L231 Difference]: Finished difference. Result has 250 places, 262 transitions, 2686 flow [2024-06-27 20:19:52,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2556, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2686, PETRI_PLACES=250, PETRI_TRANSITIONS=262} [2024-06-27 20:19:52,680 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 205 predicate places. [2024-06-27 20:19:52,680 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 262 transitions, 2686 flow [2024-06-27 20:19:52,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:52,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:52,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:52,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 20:19:52,681 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:52,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:52,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1427466917, now seen corresponding path program 5 times [2024-06-27 20:19:52,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:52,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416376221] [2024-06-27 20:19:52,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:52,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:52,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:53,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:53,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:53,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416376221] [2024-06-27 20:19:53,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416376221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:53,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:53,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:19:53,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953355770] [2024-06-27 20:19:53,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:53,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:19:53,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:53,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:19:53,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:19:53,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:19:53,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 262 transitions, 2686 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:53,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:53,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:19:53,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:54,654 INFO L124 PetriNetUnfolderBase]: 3593/5935 cut-off events. [2024-06-27 20:19:54,654 INFO L125 PetriNetUnfolderBase]: For 1062767/1062776 co-relation queries the response was YES. [2024-06-27 20:19:54,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54547 conditions, 5935 events. 3593/5935 cut-off events. For 1062767/1062776 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 38332 event pairs, 944 based on Foata normal form. 7/5863 useless extension candidates. Maximal degree in co-relation 54424. Up to 5342 conditions per place. [2024-06-27 20:19:54,729 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 201 selfloop transitions, 44 changer transitions 0/282 dead transitions. [2024-06-27 20:19:54,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 282 transitions, 3551 flow [2024-06-27 20:19:54,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:19:54,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:19:54,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-27 20:19:54,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 20:19:54,730 INFO L175 Difference]: Start difference. First operand has 250 places, 262 transitions, 2686 flow. Second operand 7 states and 140 transitions. [2024-06-27 20:19:54,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 282 transitions, 3551 flow [2024-06-27 20:19:55,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 282 transitions, 3443 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 20:19:55,644 INFO L231 Difference]: Finished difference. Result has 253 places, 271 transitions, 2873 flow [2024-06-27 20:19:55,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2578, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2873, PETRI_PLACES=253, PETRI_TRANSITIONS=271} [2024-06-27 20:19:55,652 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 208 predicate places. [2024-06-27 20:19:55,652 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 271 transitions, 2873 flow [2024-06-27 20:19:55,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:55,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:55,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:55,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 20:19:55,652 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:55,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:55,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1433180837, now seen corresponding path program 6 times [2024-06-27 20:19:55,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:55,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531162086] [2024-06-27 20:19:55,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:55,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:55,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:56,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:56,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:56,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531162086] [2024-06-27 20:19:56,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531162086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:56,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:56,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:19:56,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97614961] [2024-06-27 20:19:56,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:56,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:19:56,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:56,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:19:56,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:19:56,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:19:56,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 271 transitions, 2873 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:56,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:56,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:19:56,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:57,814 INFO L124 PetriNetUnfolderBase]: 3590/5931 cut-off events. [2024-06-27 20:19:57,814 INFO L125 PetriNetUnfolderBase]: For 1082838/1082847 co-relation queries the response was YES. [2024-06-27 20:19:57,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55006 conditions, 5931 events. 3590/5931 cut-off events. For 1082838/1082847 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 38287 event pairs, 944 based on Foata normal form. 7/5859 useless extension candidates. Maximal degree in co-relation 54881. Up to 5339 conditions per place. [2024-06-27 20:19:57,891 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 200 selfloop transitions, 44 changer transitions 0/281 dead transitions. [2024-06-27 20:19:57,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 281 transitions, 3385 flow [2024-06-27 20:19:57,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:19:57,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:19:57,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-27 20:19:57,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-06-27 20:19:57,893 INFO L175 Difference]: Start difference. First operand has 253 places, 271 transitions, 2873 flow. Second operand 7 states and 139 transitions. [2024-06-27 20:19:57,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 281 transitions, 3385 flow [2024-06-27 20:19:58,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 281 transitions, 3241 flow, removed 65 selfloop flow, removed 2 redundant places. [2024-06-27 20:19:58,944 INFO L231 Difference]: Finished difference. Result has 258 places, 271 transitions, 2823 flow [2024-06-27 20:19:58,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2729, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2823, PETRI_PLACES=258, PETRI_TRANSITIONS=271} [2024-06-27 20:19:58,944 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 213 predicate places. [2024-06-27 20:19:58,945 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 271 transitions, 2823 flow [2024-06-27 20:19:58,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:58,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:58,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:58,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 20:19:58,945 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:58,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:58,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1808676560, now seen corresponding path program 2 times [2024-06-27 20:19:58,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:58,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498491214] [2024-06-27 20:19:58,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:58,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:58,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:00,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:00,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:00,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498491214] [2024-06-27 20:20:00,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498491214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:00,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:00,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:20:00,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175059203] [2024-06-27 20:20:00,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:00,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:20:00,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:00,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:20:00,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:20:00,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:20:00,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 271 transitions, 2823 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:00,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:00,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:20:00,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:01,745 INFO L124 PetriNetUnfolderBase]: 3822/6232 cut-off events. [2024-06-27 20:20:01,745 INFO L125 PetriNetUnfolderBase]: For 1117035/1117047 co-relation queries the response was YES. [2024-06-27 20:20:01,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56598 conditions, 6232 events. 3822/6232 cut-off events. For 1117035/1117047 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 39496 event pairs, 953 based on Foata normal form. 8/6230 useless extension candidates. Maximal degree in co-relation 56471. Up to 5668 conditions per place. [2024-06-27 20:20:01,821 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 249 selfloop transitions, 47 changer transitions 0/309 dead transitions. [2024-06-27 20:20:01,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 309 transitions, 3614 flow [2024-06-27 20:20:01,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:20:01,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:20:01,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-27 20:20:01,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 20:20:01,822 INFO L175 Difference]: Start difference. First operand has 258 places, 271 transitions, 2823 flow. Second operand 10 states and 200 transitions. [2024-06-27 20:20:01,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 309 transitions, 3614 flow [2024-06-27 20:20:03,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 309 transitions, 3494 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 20:20:03,208 INFO L231 Difference]: Finished difference. Result has 263 places, 276 transitions, 2927 flow [2024-06-27 20:20:03,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2703, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2927, PETRI_PLACES=263, PETRI_TRANSITIONS=276} [2024-06-27 20:20:03,209 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 218 predicate places. [2024-06-27 20:20:03,209 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 276 transitions, 2927 flow [2024-06-27 20:20:03,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:03,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:03,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:03,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 20:20:03,209 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:03,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:03,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1429589316, now seen corresponding path program 3 times [2024-06-27 20:20:03,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:03,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981579662] [2024-06-27 20:20:03,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:03,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:03,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:04,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:04,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:04,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981579662] [2024-06-27 20:20:04,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981579662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:04,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:04,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:20:04,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539576130] [2024-06-27 20:20:04,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:04,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:20:04,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:04,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:20:04,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:20:04,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:20:04,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 276 transitions, 2927 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:04,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:04,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:20:04,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:05,995 INFO L124 PetriNetUnfolderBase]: 3839/6259 cut-off events. [2024-06-27 20:20:05,995 INFO L125 PetriNetUnfolderBase]: For 1145515/1145529 co-relation queries the response was YES. [2024-06-27 20:20:06,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57704 conditions, 6259 events. 3839/6259 cut-off events. For 1145515/1145529 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 39677 event pairs, 953 based on Foata normal form. 8/6257 useless extension candidates. Maximal degree in co-relation 57576. Up to 5695 conditions per place. [2024-06-27 20:20:06,072 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 251 selfloop transitions, 50 changer transitions 0/314 dead transitions. [2024-06-27 20:20:06,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 314 transitions, 3740 flow [2024-06-27 20:20:06,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:20:06,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:20:06,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-27 20:20:06,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45227272727272727 [2024-06-27 20:20:06,073 INFO L175 Difference]: Start difference. First operand has 263 places, 276 transitions, 2927 flow. Second operand 10 states and 199 transitions. [2024-06-27 20:20:06,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 314 transitions, 3740 flow [2024-06-27 20:20:07,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 314 transitions, 3555 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-27 20:20:07,545 INFO L231 Difference]: Finished difference. Result has 267 places, 281 transitions, 2982 flow [2024-06-27 20:20:07,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2746, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2982, PETRI_PLACES=267, PETRI_TRANSITIONS=281} [2024-06-27 20:20:07,546 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 222 predicate places. [2024-06-27 20:20:07,546 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 281 transitions, 2982 flow [2024-06-27 20:20:07,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:07,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:07,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:07,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 20:20:07,547 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:07,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:07,547 INFO L85 PathProgramCache]: Analyzing trace with hash 346693770, now seen corresponding path program 4 times [2024-06-27 20:20:07,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:07,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089227514] [2024-06-27 20:20:07,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:07,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:07,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:08,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:08,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:08,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089227514] [2024-06-27 20:20:08,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089227514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:08,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:08,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:20:08,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990820289] [2024-06-27 20:20:08,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:08,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:20:08,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:08,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:20:08,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:20:08,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:20:08,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 281 transitions, 2982 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:08,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:08,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:20:08,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:10,364 INFO L124 PetriNetUnfolderBase]: 3867/6317 cut-off events. [2024-06-27 20:20:10,364 INFO L125 PetriNetUnfolderBase]: For 1172284/1172300 co-relation queries the response was YES. [2024-06-27 20:20:10,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58701 conditions, 6317 events. 3867/6317 cut-off events. For 1172284/1172300 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 40251 event pairs, 968 based on Foata normal form. 8/6315 useless extension candidates. Maximal degree in co-relation 58571. Up to 5734 conditions per place. [2024-06-27 20:20:10,446 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 248 selfloop transitions, 60 changer transitions 0/321 dead transitions. [2024-06-27 20:20:10,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 321 transitions, 3836 flow [2024-06-27 20:20:10,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:20:10,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:20:10,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-27 20:20:10,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-27 20:20:10,448 INFO L175 Difference]: Start difference. First operand has 267 places, 281 transitions, 2982 flow. Second operand 10 states and 197 transitions. [2024-06-27 20:20:10,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 321 transitions, 3836 flow [2024-06-27 20:20:11,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 321 transitions, 3633 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-27 20:20:11,928 INFO L231 Difference]: Finished difference. Result has 271 places, 289 transitions, 3088 flow [2024-06-27 20:20:11,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2789, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3088, PETRI_PLACES=271, PETRI_TRANSITIONS=289} [2024-06-27 20:20:11,929 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 226 predicate places. [2024-06-27 20:20:11,929 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 289 transitions, 3088 flow [2024-06-27 20:20:11,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:11,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:11,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:11,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 20:20:11,929 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:11,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:11,930 INFO L85 PathProgramCache]: Analyzing trace with hash 357169290, now seen corresponding path program 5 times [2024-06-27 20:20:11,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:11,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631151130] [2024-06-27 20:20:11,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:11,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:11,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:12,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:12,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:12,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631151130] [2024-06-27 20:20:12,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631151130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:12,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:12,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:20:12,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634922254] [2024-06-27 20:20:12,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:12,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:20:12,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:12,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:20:12,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:20:13,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:20:13,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 289 transitions, 3088 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:13,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:13,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:20:13,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:14,590 INFO L124 PetriNetUnfolderBase]: 3884/6324 cut-off events. [2024-06-27 20:20:14,591 INFO L125 PetriNetUnfolderBase]: For 1198907/1198925 co-relation queries the response was YES. [2024-06-27 20:20:14,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59620 conditions, 6324 events. 3884/6324 cut-off events. For 1198907/1198925 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 40114 event pairs, 884 based on Foata normal form. 8/6322 useless extension candidates. Maximal degree in co-relation 59488. Up to 5642 conditions per place. [2024-06-27 20:20:14,664 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 244 selfloop transitions, 71 changer transitions 0/328 dead transitions. [2024-06-27 20:20:14,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 328 transitions, 4350 flow [2024-06-27 20:20:14,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:20:14,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:20:14,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-27 20:20:14,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 20:20:14,665 INFO L175 Difference]: Start difference. First operand has 271 places, 289 transitions, 3088 flow. Second operand 10 states and 200 transitions. [2024-06-27 20:20:14,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 328 transitions, 4350 flow [2024-06-27 20:20:16,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 328 transitions, 4171 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-27 20:20:16,038 INFO L231 Difference]: Finished difference. Result has 276 places, 293 transitions, 3270 flow [2024-06-27 20:20:16,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2909, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3270, PETRI_PLACES=276, PETRI_TRANSITIONS=293} [2024-06-27 20:20:16,039 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 231 predicate places. [2024-06-27 20:20:16,039 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 293 transitions, 3270 flow [2024-06-27 20:20:16,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:16,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:16,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:16,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 20:20:16,039 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:16,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:16,040 INFO L85 PathProgramCache]: Analyzing trace with hash -607550478, now seen corresponding path program 6 times [2024-06-27 20:20:16,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:16,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091429194] [2024-06-27 20:20:16,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:16,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:16,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:17,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:17,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:17,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091429194] [2024-06-27 20:20:17,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091429194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:17,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:17,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:20:17,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159831365] [2024-06-27 20:20:17,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:17,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:20:17,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:17,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:20:17,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:20:17,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:20:17,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 293 transitions, 3270 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:17,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:17,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:20:17,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:18,880 INFO L124 PetriNetUnfolderBase]: 3876/6312 cut-off events. [2024-06-27 20:20:18,880 INFO L125 PetriNetUnfolderBase]: For 1202357/1202375 co-relation queries the response was YES. [2024-06-27 20:20:18,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58054 conditions, 6312 events. 3876/6312 cut-off events. For 1202357/1202375 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 39989 event pairs, 946 based on Foata normal form. 8/6310 useless extension candidates. Maximal degree in co-relation 57921. Up to 5749 conditions per place. [2024-06-27 20:20:18,958 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 255 selfloop transitions, 57 changer transitions 0/325 dead transitions. [2024-06-27 20:20:18,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 325 transitions, 3974 flow [2024-06-27 20:20:18,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:20:18,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:20:18,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-27 20:20:18,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 20:20:18,959 INFO L175 Difference]: Start difference. First operand has 276 places, 293 transitions, 3270 flow. Second operand 10 states and 198 transitions. [2024-06-27 20:20:18,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 325 transitions, 3974 flow [2024-06-27 20:20:20,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 325 transitions, 3720 flow, removed 91 selfloop flow, removed 6 redundant places. [2024-06-27 20:20:20,851 INFO L231 Difference]: Finished difference. Result has 280 places, 293 transitions, 3137 flow [2024-06-27 20:20:20,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3016, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3137, PETRI_PLACES=280, PETRI_TRANSITIONS=293} [2024-06-27 20:20:20,852 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 235 predicate places. [2024-06-27 20:20:20,852 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 293 transitions, 3137 flow [2024-06-27 20:20:20,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:20,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:20,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:20,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 20:20:20,852 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:20,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:20,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1433170917, now seen corresponding path program 2 times [2024-06-27 20:20:20,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:20,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226652485] [2024-06-27 20:20:20,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:20,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:20,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:21,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:21,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:21,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226652485] [2024-06-27 20:20:21,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226652485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:21,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:21,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:20:21,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365898714] [2024-06-27 20:20:21,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:21,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:20:21,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:21,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:20:21,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:20:21,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:20:21,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 293 transitions, 3137 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:21,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:21,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:20:21,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:22,975 INFO L124 PetriNetUnfolderBase]: 3573/5927 cut-off events. [2024-06-27 20:20:22,975 INFO L125 PetriNetUnfolderBase]: For 1204905/1204933 co-relation queries the response was YES. [2024-06-27 20:20:23,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55499 conditions, 5927 events. 3573/5927 cut-off events. For 1204905/1204933 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 38684 event pairs, 925 based on Foata normal form. 5/5841 useless extension candidates. Maximal degree in co-relation 55364. Up to 5290 conditions per place. [2024-06-27 20:20:23,052 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 215 selfloop transitions, 40 changer transitions 0/314 dead transitions. [2024-06-27 20:20:23,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 314 transitions, 3991 flow [2024-06-27 20:20:23,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:20:23,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:20:23,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 20:20:23,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-27 20:20:23,053 INFO L175 Difference]: Start difference. First operand has 280 places, 293 transitions, 3137 flow. Second operand 8 states and 157 transitions. [2024-06-27 20:20:23,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 314 transitions, 3991 flow [2024-06-27 20:20:25,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 314 transitions, 3802 flow, removed 13 selfloop flow, removed 13 redundant places. [2024-06-27 20:20:25,179 INFO L231 Difference]: Finished difference. Result has 276 places, 302 transitions, 3182 flow [2024-06-27 20:20:25,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2948, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3182, PETRI_PLACES=276, PETRI_TRANSITIONS=302} [2024-06-27 20:20:25,180 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 231 predicate places. [2024-06-27 20:20:25,180 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 302 transitions, 3182 flow [2024-06-27 20:20:25,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:25,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:25,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:25,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 20:20:25,181 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:25,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:25,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1418438787, now seen corresponding path program 3 times [2024-06-27 20:20:25,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:25,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125061355] [2024-06-27 20:20:25,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:25,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:25,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:26,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:26,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:26,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125061355] [2024-06-27 20:20:26,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125061355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:26,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:26,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:20:26,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333547354] [2024-06-27 20:20:26,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:26,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:20:26,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:26,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:20:26,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:20:26,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:20:26,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 302 transitions, 3182 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:26,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:26,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:20:26,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:27,461 INFO L124 PetriNetUnfolderBase]: 3580/5939 cut-off events. [2024-06-27 20:20:27,462 INFO L125 PetriNetUnfolderBase]: For 1231063/1231081 co-relation queries the response was YES. [2024-06-27 20:20:27,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56053 conditions, 5939 events. 3580/5939 cut-off events. For 1231063/1231081 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 38741 event pairs, 925 based on Foata normal form. 5/5854 useless extension candidates. Maximal degree in co-relation 55920. Up to 5298 conditions per place. [2024-06-27 20:20:27,538 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 213 selfloop transitions, 45 changer transitions 0/317 dead transitions. [2024-06-27 20:20:27,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 317 transitions, 3984 flow [2024-06-27 20:20:27,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:20:27,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:20:27,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 20:20:27,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-27 20:20:27,540 INFO L175 Difference]: Start difference. First operand has 276 places, 302 transitions, 3182 flow. Second operand 8 states and 156 transitions. [2024-06-27 20:20:27,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 317 transitions, 3984 flow [2024-06-27 20:20:29,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 317 transitions, 3909 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-27 20:20:29,542 INFO L231 Difference]: Finished difference. Result has 281 places, 305 transitions, 3263 flow [2024-06-27 20:20:29,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3113, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3263, PETRI_PLACES=281, PETRI_TRANSITIONS=305} [2024-06-27 20:20:29,543 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 236 predicate places. [2024-06-27 20:20:29,543 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 305 transitions, 3263 flow [2024-06-27 20:20:29,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:29,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:29,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:29,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 20:20:29,544 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:29,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:29,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1092684087, now seen corresponding path program 4 times [2024-06-27 20:20:29,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:29,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966193021] [2024-06-27 20:20:29,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:29,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:29,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:30,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:30,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:30,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966193021] [2024-06-27 20:20:30,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966193021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:30,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:30,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:20:30,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72197539] [2024-06-27 20:20:30,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:30,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:20:30,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:30,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:20:30,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:20:30,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:20:30,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 305 transitions, 3263 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:30,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:30,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:20:30,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:31,845 INFO L124 PetriNetUnfolderBase]: 3574/5931 cut-off events. [2024-06-27 20:20:31,845 INFO L125 PetriNetUnfolderBase]: For 1244384/1244396 co-relation queries the response was YES. [2024-06-27 20:20:31,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56076 conditions, 5931 events. 3574/5931 cut-off events. For 1244384/1244396 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 38719 event pairs, 924 based on Foata normal form. 14/5855 useless extension candidates. Maximal degree in co-relation 55941. Up to 5293 conditions per place. [2024-06-27 20:20:31,915 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 210 selfloop transitions, 47 changer transitions 0/316 dead transitions. [2024-06-27 20:20:31,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 316 transitions, 3803 flow [2024-06-27 20:20:31,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:20:31,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:20:31,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 20:20:31,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 20:20:31,918 INFO L175 Difference]: Start difference. First operand has 281 places, 305 transitions, 3263 flow. Second operand 8 states and 154 transitions. [2024-06-27 20:20:31,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 316 transitions, 3803 flow [2024-06-27 20:20:33,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 316 transitions, 3649 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-27 20:20:33,977 INFO L231 Difference]: Finished difference. Result has 284 places, 305 transitions, 3209 flow [2024-06-27 20:20:33,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3109, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3209, PETRI_PLACES=284, PETRI_TRANSITIONS=305} [2024-06-27 20:20:33,978 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 239 predicate places. [2024-06-27 20:20:33,978 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 305 transitions, 3209 flow [2024-06-27 20:20:33,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:33,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:33,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:33,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 20:20:33,979 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:33,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:33,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1478740333, now seen corresponding path program 1 times [2024-06-27 20:20:33,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:33,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959570635] [2024-06-27 20:20:33,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:33,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:33,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:34,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:34,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:34,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959570635] [2024-06-27 20:20:34,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959570635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:34,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:34,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:20:34,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694573876] [2024-06-27 20:20:34,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:34,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:20:34,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:34,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:20:34,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:20:34,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:20:34,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 305 transitions, 3209 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:34,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:34,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:20:34,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:36,141 INFO L124 PetriNetUnfolderBase]: 3767/6212 cut-off events. [2024-06-27 20:20:36,141 INFO L125 PetriNetUnfolderBase]: For 1276097/1276097 co-relation queries the response was YES. [2024-06-27 20:20:36,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57917 conditions, 6212 events. 3767/6212 cut-off events. For 1276097/1276097 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 39892 event pairs, 903 based on Foata normal form. 2/6207 useless extension candidates. Maximal degree in co-relation 57781. Up to 5702 conditions per place. [2024-06-27 20:20:36,222 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 293 selfloop transitions, 17 changer transitions 0/329 dead transitions. [2024-06-27 20:20:36,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 329 transitions, 3949 flow [2024-06-27 20:20:36,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:20:36,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:20:36,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 20:20:36,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 20:20:36,223 INFO L175 Difference]: Start difference. First operand has 284 places, 305 transitions, 3209 flow. Second operand 8 states and 160 transitions. [2024-06-27 20:20:36,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 329 transitions, 3949 flow [2024-06-27 20:20:37,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 329 transitions, 3863 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 20:20:37,979 INFO L231 Difference]: Finished difference. Result has 286 places, 308 transitions, 3235 flow [2024-06-27 20:20:37,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3123, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3235, PETRI_PLACES=286, PETRI_TRANSITIONS=308} [2024-06-27 20:20:37,979 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 241 predicate places. [2024-06-27 20:20:37,979 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 308 transitions, 3235 flow [2024-06-27 20:20:37,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:37,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:37,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:37,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 20:20:37,980 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:37,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:37,980 INFO L85 PathProgramCache]: Analyzing trace with hash -164524522, now seen corresponding path program 1 times [2024-06-27 20:20:37,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:37,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419611230] [2024-06-27 20:20:37,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:37,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:37,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:38,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:38,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:38,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419611230] [2024-06-27 20:20:38,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419611230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:38,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:38,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:20:38,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934224296] [2024-06-27 20:20:38,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:38,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:20:38,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:38,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:20:38,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:20:38,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:20:38,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 308 transitions, 3235 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:38,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:38,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:20:38,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:40,259 INFO L124 PetriNetUnfolderBase]: 3887/6338 cut-off events. [2024-06-27 20:20:40,260 INFO L125 PetriNetUnfolderBase]: For 1293807/1293807 co-relation queries the response was YES. [2024-06-27 20:20:40,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59428 conditions, 6338 events. 3887/6338 cut-off events. For 1293807/1293807 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 40127 event pairs, 940 based on Foata normal form. 1/6336 useless extension candidates. Maximal degree in co-relation 59291. Up to 5942 conditions per place. [2024-06-27 20:20:40,347 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 300 selfloop transitions, 17 changer transitions 0/328 dead transitions. [2024-06-27 20:20:40,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 328 transitions, 3985 flow [2024-06-27 20:20:40,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:20:40,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:20:40,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:20:40,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-27 20:20:40,348 INFO L175 Difference]: Start difference. First operand has 286 places, 308 transitions, 3235 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:20:40,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 328 transitions, 3985 flow [2024-06-27 20:20:42,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 328 transitions, 3895 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 20:20:42,299 INFO L231 Difference]: Finished difference. Result has 288 places, 311 transitions, 3265 flow [2024-06-27 20:20:42,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3145, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3265, PETRI_PLACES=288, PETRI_TRANSITIONS=311} [2024-06-27 20:20:42,299 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 243 predicate places. [2024-06-27 20:20:42,300 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 311 transitions, 3265 flow [2024-06-27 20:20:42,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:42,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:42,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:42,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 20:20:42,300 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:42,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:42,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1478890063, now seen corresponding path program 2 times [2024-06-27 20:20:42,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:42,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573993109] [2024-06-27 20:20:42,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:42,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:42,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:43,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:43,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:43,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573993109] [2024-06-27 20:20:43,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573993109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:43,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:43,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:20:43,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750732583] [2024-06-27 20:20:43,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:43,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:20:43,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:43,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:20:43,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:20:43,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:20:43,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 311 transitions, 3265 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:43,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:43,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:20:43,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:44,605 INFO L124 PetriNetUnfolderBase]: 3792/6255 cut-off events. [2024-06-27 20:20:44,606 INFO L125 PetriNetUnfolderBase]: For 1326011/1326011 co-relation queries the response was YES. [2024-06-27 20:20:44,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59412 conditions, 6255 events. 3792/6255 cut-off events. For 1326011/1326011 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 40298 event pairs, 912 based on Foata normal form. 2/6250 useless extension candidates. Maximal degree in co-relation 59274. Up to 5722 conditions per place. [2024-06-27 20:20:44,690 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 291 selfloop transitions, 22 changer transitions 0/333 dead transitions. [2024-06-27 20:20:44,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 333 transitions, 4015 flow [2024-06-27 20:20:44,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:20:44,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:20:44,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 20:20:44,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 20:20:44,691 INFO L175 Difference]: Start difference. First operand has 288 places, 311 transitions, 3265 flow. Second operand 8 states and 160 transitions. [2024-06-27 20:20:44,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 333 transitions, 4015 flow [2024-06-27 20:20:46,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 333 transitions, 3917 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 20:20:46,401 INFO L231 Difference]: Finished difference. Result has 290 places, 314 transitions, 3297 flow [2024-06-27 20:20:46,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3167, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3297, PETRI_PLACES=290, PETRI_TRANSITIONS=314} [2024-06-27 20:20:46,402 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 245 predicate places. [2024-06-27 20:20:46,402 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 314 transitions, 3297 flow [2024-06-27 20:20:46,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:46,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:46,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:46,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 20:20:46,402 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:46,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:46,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1484461910, now seen corresponding path program 2 times [2024-06-27 20:20:46,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:46,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739279376] [2024-06-27 20:20:46,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:46,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:46,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:47,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:47,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:47,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739279376] [2024-06-27 20:20:47,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739279376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:47,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:47,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:20:47,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055882619] [2024-06-27 20:20:47,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:47,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:20:47,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:47,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:20:47,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:20:47,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:20:47,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 314 transitions, 3297 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:47,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:47,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:20:47,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:48,764 INFO L124 PetriNetUnfolderBase]: 3910/6372 cut-off events. [2024-06-27 20:20:48,764 INFO L125 PetriNetUnfolderBase]: For 1349531/1349531 co-relation queries the response was YES. [2024-06-27 20:20:48,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61038 conditions, 6372 events. 3910/6372 cut-off events. For 1349531/1349531 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 40403 event pairs, 940 based on Foata normal form. 1/6370 useless extension candidates. Maximal degree in co-relation 60899. Up to 5958 conditions per place. [2024-06-27 20:20:48,847 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 294 selfloop transitions, 30 changer transitions 0/335 dead transitions. [2024-06-27 20:20:48,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 335 transitions, 4353 flow [2024-06-27 20:20:48,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:20:48,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:20:48,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:20:48,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-27 20:20:48,848 INFO L175 Difference]: Start difference. First operand has 290 places, 314 transitions, 3297 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:20:48,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 335 transitions, 4353 flow [2024-06-27 20:20:50,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 335 transitions, 4245 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 20:20:50,667 INFO L231 Difference]: Finished difference. Result has 292 places, 320 transitions, 3425 flow [2024-06-27 20:20:50,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3189, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3425, PETRI_PLACES=292, PETRI_TRANSITIONS=320} [2024-06-27 20:20:50,668 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 247 predicate places. [2024-06-27 20:20:50,668 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 320 transitions, 3425 flow [2024-06-27 20:20:50,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:50,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:50,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:50,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 20:20:50,669 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:50,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:50,669 INFO L85 PathProgramCache]: Analyzing trace with hash 826666329, now seen corresponding path program 1 times [2024-06-27 20:20:50,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:50,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969369681] [2024-06-27 20:20:50,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:50,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:50,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:51,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:51,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:51,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969369681] [2024-06-27 20:20:51,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969369681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:51,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:51,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:20:51,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590693822] [2024-06-27 20:20:51,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:51,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:20:51,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:51,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:20:51,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:20:51,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:20:51,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 320 transitions, 3425 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:51,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:51,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:20:51,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:53,038 INFO L124 PetriNetUnfolderBase]: 3708/6124 cut-off events. [2024-06-27 20:20:53,038 INFO L125 PetriNetUnfolderBase]: For 1378377/1378377 co-relation queries the response was YES. [2024-06-27 20:20:53,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60202 conditions, 6124 events. 3708/6124 cut-off events. For 1378377/1378377 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 39687 event pairs, 899 based on Foata normal form. 2/6051 useless extension candidates. Maximal degree in co-relation 60062. Up to 5560 conditions per place. [2024-06-27 20:20:53,111 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 282 selfloop transitions, 17 changer transitions 0/337 dead transitions. [2024-06-27 20:20:53,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 337 transitions, 4131 flow [2024-06-27 20:20:53,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:20:53,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:20:53,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:20:53,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-27 20:20:53,113 INFO L175 Difference]: Start difference. First operand has 292 places, 320 transitions, 3425 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:20:53,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 337 transitions, 4131 flow [2024-06-27 20:20:55,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 337 transitions, 4023 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-27 20:20:55,176 INFO L231 Difference]: Finished difference. Result has 296 places, 323 transitions, 3437 flow [2024-06-27 20:20:55,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3317, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3437, PETRI_PLACES=296, PETRI_TRANSITIONS=323} [2024-06-27 20:20:55,177 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 251 predicate places. [2024-06-27 20:20:55,177 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 323 transitions, 3437 flow [2024-06-27 20:20:55,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:55,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:55,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:55,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 20:20:55,178 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:55,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:55,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1484454470, now seen corresponding path program 3 times [2024-06-27 20:20:55,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:55,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484272847] [2024-06-27 20:20:55,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:55,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:55,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:56,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:56,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:56,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484272847] [2024-06-27 20:20:56,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484272847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:56,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:56,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:20:56,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451145250] [2024-06-27 20:20:56,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:56,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:20:56,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:56,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:20:56,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:20:56,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:20:56,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 323 transitions, 3437 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:56,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:56,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:20:56,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:57,612 INFO L124 PetriNetUnfolderBase]: 3912/6387 cut-off events. [2024-06-27 20:20:57,612 INFO L125 PetriNetUnfolderBase]: For 1393350/1393350 co-relation queries the response was YES. [2024-06-27 20:20:57,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61904 conditions, 6387 events. 3912/6387 cut-off events. For 1393350/1393350 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 40625 event pairs, 949 based on Foata normal form. 1/6385 useless extension candidates. Maximal degree in co-relation 61762. Up to 5962 conditions per place. [2024-06-27 20:20:57,689 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 297 selfloop transitions, 29 changer transitions 0/337 dead transitions. [2024-06-27 20:20:57,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 337 transitions, 4123 flow [2024-06-27 20:20:57,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:20:57,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:20:57,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:20:57,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-27 20:20:57,691 INFO L175 Difference]: Start difference. First operand has 296 places, 323 transitions, 3437 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:20:57,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 337 transitions, 4123 flow [2024-06-27 20:21:00,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 337 transitions, 3973 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-27 20:21:00,034 INFO L231 Difference]: Finished difference. Result has 298 places, 323 transitions, 3351 flow [2024-06-27 20:21:00,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3287, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3351, PETRI_PLACES=298, PETRI_TRANSITIONS=323} [2024-06-27 20:21:00,034 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 253 predicate places. [2024-06-27 20:21:00,035 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 323 transitions, 3351 flow [2024-06-27 20:21:00,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:00,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:00,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:00,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 20:21:00,035 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:00,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:00,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1484454253, now seen corresponding path program 3 times [2024-06-27 20:21:00,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:00,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808057385] [2024-06-27 20:21:00,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:00,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:00,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:01,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:01,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:01,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808057385] [2024-06-27 20:21:01,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808057385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:01,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:01,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:21:01,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333487179] [2024-06-27 20:21:01,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:01,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:21:01,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:01,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:21:01,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:21:01,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:21:01,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 323 transitions, 3351 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:01,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:01,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:21:01,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:02,500 INFO L124 PetriNetUnfolderBase]: 3816/6293 cut-off events. [2024-06-27 20:21:02,501 INFO L125 PetriNetUnfolderBase]: For 1427174/1427174 co-relation queries the response was YES. [2024-06-27 20:21:02,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61610 conditions, 6293 events. 3816/6293 cut-off events. For 1427174/1427174 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 40583 event pairs, 911 based on Foata normal form. 2/6288 useless extension candidates. Maximal degree in co-relation 61467. Up to 5740 conditions per place. [2024-06-27 20:21:02,586 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 291 selfloop transitions, 29 changer transitions 0/342 dead transitions. [2024-06-27 20:21:02,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 342 transitions, 4117 flow [2024-06-27 20:21:02,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:21:02,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:21:02,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 20:21:02,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-27 20:21:02,587 INFO L175 Difference]: Start difference. First operand has 298 places, 323 transitions, 3351 flow. Second operand 8 states and 159 transitions. [2024-06-27 20:21:02,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 342 transitions, 4117 flow [2024-06-27 20:21:04,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 342 transitions, 4037 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 20:21:04,643 INFO L231 Difference]: Finished difference. Result has 299 places, 326 transitions, 3425 flow [2024-06-27 20:21:04,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3271, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3425, PETRI_PLACES=299, PETRI_TRANSITIONS=326} [2024-06-27 20:21:04,644 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 254 predicate places. [2024-06-27 20:21:04,644 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 326 transitions, 3425 flow [2024-06-27 20:21:04,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:04,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:04,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:04,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 20:21:04,645 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:04,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:04,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1427458981, now seen corresponding path program 4 times [2024-06-27 20:21:04,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:04,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509391551] [2024-06-27 20:21:04,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:04,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:04,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:05,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:05,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:05,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509391551] [2024-06-27 20:21:05,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509391551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:05,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:05,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:21:05,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405500138] [2024-06-27 20:21:05,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:05,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:21:05,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:05,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:21:05,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:21:05,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:21:05,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 326 transitions, 3425 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:05,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:05,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:21:05,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:07,202 INFO L124 PetriNetUnfolderBase]: 3818/6299 cut-off events. [2024-06-27 20:21:07,202 INFO L125 PetriNetUnfolderBase]: For 1448670/1448673 co-relation queries the response was YES. [2024-06-27 20:21:07,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62290 conditions, 6299 events. 3818/6299 cut-off events. For 1448670/1448673 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 40597 event pairs, 923 based on Foata normal form. 2/6293 useless extension candidates. Maximal degree in co-relation 62146. Up to 5728 conditions per place. [2024-06-27 20:21:07,296 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 282 selfloop transitions, 38 changer transitions 0/342 dead transitions. [2024-06-27 20:21:07,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 342 transitions, 4189 flow [2024-06-27 20:21:07,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:21:07,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:21:07,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 20:21:07,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-27 20:21:07,297 INFO L175 Difference]: Start difference. First operand has 299 places, 326 transitions, 3425 flow. Second operand 8 states and 158 transitions. [2024-06-27 20:21:07,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 342 transitions, 4189 flow [2024-06-27 20:21:09,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 342 transitions, 4057 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-27 20:21:09,703 INFO L231 Difference]: Finished difference. Result has 301 places, 329 transitions, 3471 flow [2024-06-27 20:21:09,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3293, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3471, PETRI_PLACES=301, PETRI_TRANSITIONS=329} [2024-06-27 20:21:09,703 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 256 predicate places. [2024-06-27 20:21:09,703 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 329 transitions, 3471 flow [2024-06-27 20:21:09,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:09,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:09,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:09,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 20:21:09,704 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:09,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:09,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1427458764, now seen corresponding path program 4 times [2024-06-27 20:21:09,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:09,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006950398] [2024-06-27 20:21:09,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:09,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:09,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:10,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:10,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:10,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006950398] [2024-06-27 20:21:10,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006950398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:10,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:10,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:21:10,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196919730] [2024-06-27 20:21:10,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:10,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:21:10,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:10,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:21:10,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:21:10,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:21:10,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 329 transitions, 3471 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:10,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:10,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:21:10,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:12,196 INFO L124 PetriNetUnfolderBase]: 3929/6406 cut-off events. [2024-06-27 20:21:12,197 INFO L125 PetriNetUnfolderBase]: For 1466404/1466407 co-relation queries the response was YES. [2024-06-27 20:21:12,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63629 conditions, 6406 events. 3929/6406 cut-off events. For 1466404/1466407 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 40680 event pairs, 947 based on Foata normal form. 1/6403 useless extension candidates. Maximal degree in co-relation 63484. Up to 5959 conditions per place. [2024-06-27 20:21:12,282 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 289 selfloop transitions, 47 changer transitions 0/347 dead transitions. [2024-06-27 20:21:12,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 347 transitions, 4577 flow [2024-06-27 20:21:12,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:21:12,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:21:12,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:21:12,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-27 20:21:12,283 INFO L175 Difference]: Start difference. First operand has 301 places, 329 transitions, 3471 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:21:12,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 347 transitions, 4577 flow [2024-06-27 20:21:14,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 347 transitions, 4421 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-27 20:21:14,890 INFO L231 Difference]: Finished difference. Result has 303 places, 335 transitions, 3609 flow [2024-06-27 20:21:14,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3315, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3609, PETRI_PLACES=303, PETRI_TRANSITIONS=335} [2024-06-27 20:21:14,891 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 258 predicate places. [2024-06-27 20:21:14,891 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 335 transitions, 3609 flow [2024-06-27 20:21:14,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:14,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:14,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:14,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 20:21:14,892 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:14,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:14,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1427451324, now seen corresponding path program 5 times [2024-06-27 20:21:14,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:14,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910840995] [2024-06-27 20:21:14,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:14,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:14,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:15,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:15,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:15,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910840995] [2024-06-27 20:21:15,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910840995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:15,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:15,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:21:15,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173701834] [2024-06-27 20:21:15,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:15,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:21:15,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:15,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:21:15,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:21:15,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:21:15,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 335 transitions, 3609 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:15,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:15,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:21:15,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:17,326 INFO L124 PetriNetUnfolderBase]: 3934/6423 cut-off events. [2024-06-27 20:21:17,327 INFO L125 PetriNetUnfolderBase]: For 1494145/1494148 co-relation queries the response was YES. [2024-06-27 20:21:17,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64127 conditions, 6423 events. 3934/6423 cut-off events. For 1494145/1494148 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 40904 event pairs, 957 based on Foata normal form. 1/6420 useless extension candidates. Maximal degree in co-relation 63981. Up to 5965 conditions per place. [2024-06-27 20:21:17,407 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 290 selfloop transitions, 49 changer transitions 0/350 dead transitions. [2024-06-27 20:21:17,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 350 transitions, 4635 flow [2024-06-27 20:21:17,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:21:17,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:21:17,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 20:21:17,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-27 20:21:17,409 INFO L175 Difference]: Start difference. First operand has 303 places, 335 transitions, 3609 flow. Second operand 8 states and 152 transitions. [2024-06-27 20:21:17,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 350 transitions, 4635 flow [2024-06-27 20:21:19,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 350 transitions, 4435 flow, removed 67 selfloop flow, removed 5 redundant places. [2024-06-27 20:21:19,887 INFO L231 Difference]: Finished difference. Result has 306 places, 338 transitions, 3613 flow [2024-06-27 20:21:19,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3429, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3613, PETRI_PLACES=306, PETRI_TRANSITIONS=338} [2024-06-27 20:21:19,888 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 261 predicate places. [2024-06-27 20:21:19,888 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 338 transitions, 3613 flow [2024-06-27 20:21:19,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:19,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:19,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:19,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 20:21:19,888 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:19,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:19,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1427451045, now seen corresponding path program 2 times [2024-06-27 20:21:19,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:19,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261035630] [2024-06-27 20:21:19,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:19,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:19,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:20,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:20,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:20,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261035630] [2024-06-27 20:21:20,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261035630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:20,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:20,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:21:20,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050811805] [2024-06-27 20:21:20,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:20,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:21:20,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:20,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:21:20,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:21:20,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:21:20,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 338 transitions, 3613 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:20,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:20,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:21:20,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:22,128 INFO L124 PetriNetUnfolderBase]: 3731/6164 cut-off events. [2024-06-27 20:21:22,128 INFO L125 PetriNetUnfolderBase]: For 1518971/1518974 co-relation queries the response was YES. [2024-06-27 20:21:22,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62724 conditions, 6164 events. 3731/6164 cut-off events. For 1518971/1518974 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 39983 event pairs, 903 based on Foata normal form. 4/6092 useless extension candidates. Maximal degree in co-relation 62577. Up to 5560 conditions per place. [2024-06-27 20:21:22,395 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 278 selfloop transitions, 37 changer transitions 0/356 dead transitions. [2024-06-27 20:21:22,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 356 transitions, 4661 flow [2024-06-27 20:21:22,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:21:22,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:21:22,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 20:21:22,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-27 20:21:22,397 INFO L175 Difference]: Start difference. First operand has 306 places, 338 transitions, 3613 flow. Second operand 8 states and 157 transitions. [2024-06-27 20:21:22,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 356 transitions, 4661 flow [2024-06-27 20:21:24,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 356 transitions, 4511 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-27 20:21:24,772 INFO L231 Difference]: Finished difference. Result has 309 places, 344 transitions, 3717 flow [2024-06-27 20:21:24,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3463, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3717, PETRI_PLACES=309, PETRI_TRANSITIONS=344} [2024-06-27 20:21:24,773 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 264 predicate places. [2024-06-27 20:21:24,773 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 344 transitions, 3717 flow [2024-06-27 20:21:24,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:24,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:24,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:24,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 20:21:24,773 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:24,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:24,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1418254554, now seen corresponding path program 6 times [2024-06-27 20:21:24,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:24,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666602279] [2024-06-27 20:21:24,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:24,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:24,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:25,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:25,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:25,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666602279] [2024-06-27 20:21:25,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666602279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:25,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:25,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:21:25,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312919108] [2024-06-27 20:21:25,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:25,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:21:25,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:25,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:21:25,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:21:25,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:21:25,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 344 transitions, 3717 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:25,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:25,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:21:25,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:27,076 INFO L124 PetriNetUnfolderBase]: 3936/6428 cut-off events. [2024-06-27 20:21:27,076 INFO L125 PetriNetUnfolderBase]: For 1538071/1538074 co-relation queries the response was YES. [2024-06-27 20:21:27,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64372 conditions, 6428 events. 3936/6428 cut-off events. For 1538071/1538074 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 40901 event pairs, 957 based on Foata normal form. 1/6425 useless extension candidates. Maximal degree in co-relation 64224. Up to 5969 conditions per place. [2024-06-27 20:21:27,170 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 292 selfloop transitions, 52 changer transitions 0/355 dead transitions. [2024-06-27 20:21:27,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 355 transitions, 4431 flow [2024-06-27 20:21:27,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:21:27,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:21:27,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:21:27,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-27 20:21:27,171 INFO L175 Difference]: Start difference. First operand has 309 places, 344 transitions, 3717 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:21:27,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 355 transitions, 4431 flow [2024-06-27 20:21:30,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 355 transitions, 4253 flow, removed 74 selfloop flow, removed 4 redundant places. [2024-06-27 20:21:30,012 INFO L231 Difference]: Finished difference. Result has 313 places, 344 transitions, 3649 flow [2024-06-27 20:21:30,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3539, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3649, PETRI_PLACES=313, PETRI_TRANSITIONS=344} [2024-06-27 20:21:30,013 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 268 predicate places. [2024-06-27 20:21:30,013 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 344 transitions, 3649 flow [2024-06-27 20:21:30,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:30,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:30,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:30,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 20:21:30,013 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:30,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:30,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1418254275, now seen corresponding path program 3 times [2024-06-27 20:21:30,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:30,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041306853] [2024-06-27 20:21:30,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:30,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:30,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:30,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:30,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:30,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041306853] [2024-06-27 20:21:30,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041306853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:30,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:30,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:21:30,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620039898] [2024-06-27 20:21:30,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:30,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:21:30,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:30,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:21:30,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:21:31,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:21:31,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 344 transitions, 3649 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:31,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:31,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:21:31,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:32,443 INFO L124 PetriNetUnfolderBase]: 3733/6169 cut-off events. [2024-06-27 20:21:32,444 INFO L125 PetriNetUnfolderBase]: For 1566118/1566121 co-relation queries the response was YES. [2024-06-27 20:21:32,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63305 conditions, 6169 events. 3733/6169 cut-off events. For 1566118/1566121 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 40040 event pairs, 903 based on Foata normal form. 4/6097 useless extension candidates. Maximal degree in co-relation 63155. Up to 5563 conditions per place. [2024-06-27 20:21:32,534 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 277 selfloop transitions, 41 changer transitions 0/359 dead transitions. [2024-06-27 20:21:32,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 359 transitions, 4623 flow [2024-06-27 20:21:32,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:21:32,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:21:32,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 20:21:32,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-27 20:21:32,536 INFO L175 Difference]: Start difference. First operand has 313 places, 344 transitions, 3649 flow. Second operand 8 states and 156 transitions. [2024-06-27 20:21:32,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 359 transitions, 4623 flow [2024-06-27 20:21:35,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 359 transitions, 4495 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 20:21:35,123 INFO L231 Difference]: Finished difference. Result has 313 places, 347 transitions, 3693 flow [2024-06-27 20:21:35,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3521, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3693, PETRI_PLACES=313, PETRI_TRANSITIONS=347} [2024-06-27 20:21:35,124 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 268 predicate places. [2024-06-27 20:21:35,124 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 347 transitions, 3693 flow [2024-06-27 20:21:35,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:35,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:35,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:35,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 20:21:35,125 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:35,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:35,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1417927845, now seen corresponding path program 4 times [2024-06-27 20:21:35,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:35,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684774863] [2024-06-27 20:21:35,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:35,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:36,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:36,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:36,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684774863] [2024-06-27 20:21:36,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684774863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:36,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:36,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:21:36,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530640493] [2024-06-27 20:21:36,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:36,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:21:36,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:36,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:21:36,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:21:36,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:21:36,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 347 transitions, 3693 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:36,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:36,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:21:36,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:37,652 INFO L124 PetriNetUnfolderBase]: 3727/6161 cut-off events. [2024-06-27 20:21:37,652 INFO L125 PetriNetUnfolderBase]: For 1579463/1579466 co-relation queries the response was YES. [2024-06-27 20:21:37,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63190 conditions, 6161 events. 3727/6161 cut-off events. For 1579463/1579466 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 39971 event pairs, 902 based on Foata normal form. 4/6089 useless extension candidates. Maximal degree in co-relation 63039. Up to 5558 conditions per place. [2024-06-27 20:21:37,731 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 274 selfloop transitions, 43 changer transitions 0/358 dead transitions. [2024-06-27 20:21:37,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 358 transitions, 4353 flow [2024-06-27 20:21:37,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:21:37,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:21:37,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 20:21:37,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 20:21:37,733 INFO L175 Difference]: Start difference. First operand has 313 places, 347 transitions, 3693 flow. Second operand 8 states and 154 transitions. [2024-06-27 20:21:37,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 358 transitions, 4353 flow [2024-06-27 20:21:40,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 358 transitions, 4131 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-06-27 20:21:40,197 INFO L231 Difference]: Finished difference. Result has 315 places, 347 transitions, 3564 flow [2024-06-27 20:21:40,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3471, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3564, PETRI_PLACES=315, PETRI_TRANSITIONS=347} [2024-06-27 20:21:40,197 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 270 predicate places. [2024-06-27 20:21:40,197 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 347 transitions, 3564 flow [2024-06-27 20:21:40,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:40,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:40,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:40,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 20:21:40,198 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:40,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:40,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1417915941, now seen corresponding path program 1 times [2024-06-27 20:21:40,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:40,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199410177] [2024-06-27 20:21:40,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:40,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:40,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:41,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:41,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:41,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199410177] [2024-06-27 20:21:41,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199410177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:41,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:41,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:21:41,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076484153] [2024-06-27 20:21:41,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:41,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:21:41,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:41,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:21:41,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:21:41,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:21:41,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 347 transitions, 3564 flow. Second operand has 11 states, 11 states have (on average 13.454545454545455) internal successors, (148), 11 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:41,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:41,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:21:41,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:42,989 INFO L124 PetriNetUnfolderBase]: 3648/6066 cut-off events. [2024-06-27 20:21:42,990 INFO L125 PetriNetUnfolderBase]: For 1592770/1592778 co-relation queries the response was YES. [2024-06-27 20:21:43,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62372 conditions, 6066 events. 3648/6066 cut-off events. For 1592770/1592778 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 39803 event pairs, 922 based on Foata normal form. 1/5983 useless extension candidates. Maximal degree in co-relation 62220. Up to 5438 conditions per place. [2024-06-27 20:21:43,084 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 277 selfloop transitions, 20 changer transitions 0/362 dead transitions. [2024-06-27 20:21:43,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 362 transitions, 4262 flow [2024-06-27 20:21:43,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:21:43,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:21:43,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 20:21:43,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41919191919191917 [2024-06-27 20:21:43,085 INFO L175 Difference]: Start difference. First operand has 315 places, 347 transitions, 3564 flow. Second operand 9 states and 166 transitions. [2024-06-27 20:21:43,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 362 transitions, 4262 flow [2024-06-27 20:21:45,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 362 transitions, 4166 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 20:21:45,445 INFO L231 Difference]: Finished difference. Result has 317 places, 350 transitions, 3596 flow [2024-06-27 20:21:45,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3468, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3596, PETRI_PLACES=317, PETRI_TRANSITIONS=350} [2024-06-27 20:21:45,445 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 272 predicate places. [2024-06-27 20:21:45,445 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 350 transitions, 3596 flow [2024-06-27 20:21:45,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.454545454545455) internal successors, (148), 11 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:45,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:45,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:45,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 20:21:45,446 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:45,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:45,447 INFO L85 PathProgramCache]: Analyzing trace with hash 413290487, now seen corresponding path program 1 times [2024-06-27 20:21:45,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:45,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048873876] [2024-06-27 20:21:45,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:45,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:45,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:46,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:46,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:46,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048873876] [2024-06-27 20:21:46,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048873876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:46,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:46,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:21:46,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514092308] [2024-06-27 20:21:46,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:46,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:21:46,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:46,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:21:46,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:21:46,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:21:46,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 350 transitions, 3596 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:46,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:46,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:21:46,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:47,783 INFO L124 PetriNetUnfolderBase]: 3753/6183 cut-off events. [2024-06-27 20:21:47,783 INFO L125 PetriNetUnfolderBase]: For 1622728/1622728 co-relation queries the response was YES. [2024-06-27 20:21:47,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64009 conditions, 6183 events. 3753/6183 cut-off events. For 1622728/1622728 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 40013 event pairs, 892 based on Foata normal form. 1/6101 useless extension candidates. Maximal degree in co-relation 63856. Up to 5590 conditions per place. [2024-06-27 20:21:47,875 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 313 selfloop transitions, 17 changer transitions 0/379 dead transitions. [2024-06-27 20:21:47,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 379 transitions, 4416 flow [2024-06-27 20:21:47,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:21:47,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:21:47,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-27 20:21:47,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-27 20:21:47,876 INFO L175 Difference]: Start difference. First operand has 317 places, 350 transitions, 3596 flow. Second operand 8 states and 165 transitions. [2024-06-27 20:21:47,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 379 transitions, 4416 flow [2024-06-27 20:21:50,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 379 transitions, 4234 flow, removed 38 selfloop flow, removed 10 redundant places. [2024-06-27 20:21:50,715 INFO L231 Difference]: Finished difference. Result has 315 places, 353 transitions, 3554 flow [2024-06-27 20:21:50,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3414, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3554, PETRI_PLACES=315, PETRI_TRANSITIONS=353} [2024-06-27 20:21:50,715 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 270 predicate places. [2024-06-27 20:21:50,715 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 353 transitions, 3554 flow [2024-06-27 20:21:50,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:50,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:50,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:50,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 20:21:50,716 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:50,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:50,716 INFO L85 PathProgramCache]: Analyzing trace with hash 420909047, now seen corresponding path program 2 times [2024-06-27 20:21:50,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:50,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510390415] [2024-06-27 20:21:50,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:50,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:50,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:51,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:51,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:51,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510390415] [2024-06-27 20:21:51,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510390415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:51,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:51,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:21:51,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516604404] [2024-06-27 20:21:51,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:51,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:21:51,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:51,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:21:51,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:21:51,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:21:51,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 353 transitions, 3554 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:51,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:51,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:21:51,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:53,148 INFO L124 PetriNetUnfolderBase]: 3763/6199 cut-off events. [2024-06-27 20:21:53,148 INFO L125 PetriNetUnfolderBase]: For 1650740/1650740 co-relation queries the response was YES. [2024-06-27 20:21:53,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64701 conditions, 6199 events. 3763/6199 cut-off events. For 1650740/1650740 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 40148 event pairs, 892 based on Foata normal form. 1/6117 useless extension candidates. Maximal degree in co-relation 64548. Up to 5598 conditions per place. [2024-06-27 20:21:53,247 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 314 selfloop transitions, 23 changer transitions 0/386 dead transitions. [2024-06-27 20:21:53,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 386 transitions, 4418 flow [2024-06-27 20:21:53,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:21:53,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:21:53,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-27 20:21:53,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595959595959596 [2024-06-27 20:21:53,248 INFO L175 Difference]: Start difference. First operand has 315 places, 353 transitions, 3554 flow. Second operand 9 states and 182 transitions. [2024-06-27 20:21:53,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 386 transitions, 4418 flow [2024-06-27 20:21:55,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 386 transitions, 4300 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-27 20:21:55,936 INFO L231 Difference]: Finished difference. Result has 319 places, 359 transitions, 3630 flow [2024-06-27 20:21:55,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3436, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3630, PETRI_PLACES=319, PETRI_TRANSITIONS=359} [2024-06-27 20:21:55,937 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 274 predicate places. [2024-06-27 20:21:55,937 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 359 transitions, 3630 flow [2024-06-27 20:21:55,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:55,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:55,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:55,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 20:21:55,938 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:55,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:55,938 INFO L85 PathProgramCache]: Analyzing trace with hash 997317829, now seen corresponding path program 1 times [2024-06-27 20:21:55,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:55,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368207843] [2024-06-27 20:21:55,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:55,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:55,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:56,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:56,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:56,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368207843] [2024-06-27 20:21:56,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368207843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:56,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:56,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:21:56,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762099358] [2024-06-27 20:21:56,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:56,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:21:56,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:56,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:21:56,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:21:56,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:21:56,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 359 transitions, 3630 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:56,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:56,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:21:56,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:58,396 INFO L124 PetriNetUnfolderBase]: 3771/6211 cut-off events. [2024-06-27 20:21:58,396 INFO L125 PetriNetUnfolderBase]: For 1688696/1688696 co-relation queries the response was YES. [2024-06-27 20:21:58,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65455 conditions, 6211 events. 3771/6211 cut-off events. For 1688696/1688696 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 40154 event pairs, 733 based on Foata normal form. 2/6160 useless extension candidates. Maximal degree in co-relation 65300. Up to 5590 conditions per place. [2024-06-27 20:21:58,479 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 325 selfloop transitions, 15 changer transitions 0/389 dead transitions. [2024-06-27 20:21:58,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 389 transitions, 4444 flow [2024-06-27 20:21:58,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:21:58,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:21:58,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-27 20:21:58,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-27 20:21:58,481 INFO L175 Difference]: Start difference. First operand has 319 places, 359 transitions, 3630 flow. Second operand 8 states and 165 transitions. [2024-06-27 20:21:58,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 389 transitions, 4444 flow [2024-06-27 20:22:01,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 389 transitions, 4312 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-27 20:22:01,669 INFO L231 Difference]: Finished difference. Result has 321 places, 361 transitions, 3601 flow [2024-06-27 20:22:01,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3498, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3601, PETRI_PLACES=321, PETRI_TRANSITIONS=361} [2024-06-27 20:22:01,669 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 276 predicate places. [2024-06-27 20:22:01,670 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 361 transitions, 3601 flow [2024-06-27 20:22:01,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:01,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:01,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:01,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 20:22:01,670 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:01,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:01,671 INFO L85 PathProgramCache]: Analyzing trace with hash 420906071, now seen corresponding path program 2 times [2024-06-27 20:22:01,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:01,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456245608] [2024-06-27 20:22:01,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:01,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:01,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:02,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:02,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:02,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456245608] [2024-06-27 20:22:02,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456245608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:02,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:02,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:22:02,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506860826] [2024-06-27 20:22:02,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:02,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:22:02,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:02,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:22:02,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:22:02,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:22:02,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 361 transitions, 3601 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:02,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:02,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:22:02,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:04,129 INFO L124 PetriNetUnfolderBase]: 3779/6223 cut-off events. [2024-06-27 20:22:04,129 INFO L125 PetriNetUnfolderBase]: For 1715140/1715140 co-relation queries the response was YES. [2024-06-27 20:22:04,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65904 conditions, 6223 events. 3779/6223 cut-off events. For 1715140/1715140 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 40337 event pairs, 890 based on Foata normal form. 2/6142 useless extension candidates. Maximal degree in co-relation 65748. Up to 5631 conditions per place. [2024-06-27 20:22:04,224 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 322 selfloop transitions, 16 changer transitions 0/387 dead transitions. [2024-06-27 20:22:04,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 387 transitions, 4405 flow [2024-06-27 20:22:04,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:22:04,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:22:04,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-27 20:22:04,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-06-27 20:22:04,226 INFO L175 Difference]: Start difference. First operand has 321 places, 361 transitions, 3601 flow. Second operand 8 states and 162 transitions. [2024-06-27 20:22:04,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 387 transitions, 4405 flow [2024-06-27 20:22:07,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 387 transitions, 4318 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 20:22:07,411 INFO L231 Difference]: Finished difference. Result has 323 places, 363 transitions, 3623 flow [2024-06-27 20:22:07,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3514, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3623, PETRI_PLACES=323, PETRI_TRANSITIONS=363} [2024-06-27 20:22:07,412 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 278 predicate places. [2024-06-27 20:22:07,412 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 363 transitions, 3623 flow [2024-06-27 20:22:07,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:07,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:07,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:07,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 20:22:07,413 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:07,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:07,413 INFO L85 PathProgramCache]: Analyzing trace with hash 528581657, now seen corresponding path program 3 times [2024-06-27 20:22:07,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:07,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873658524] [2024-06-27 20:22:07,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:07,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:07,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:08,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:08,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:08,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873658524] [2024-06-27 20:22:08,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873658524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:08,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:08,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:22:08,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775265650] [2024-06-27 20:22:08,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:08,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:22:08,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:08,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:22:08,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:22:08,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:22:08,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 363 transitions, 3623 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:08,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:08,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:22:08,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:09,665 INFO L124 PetriNetUnfolderBase]: 3784/6233 cut-off events. [2024-06-27 20:22:09,665 INFO L125 PetriNetUnfolderBase]: For 1738169/1738172 co-relation queries the response was YES. [2024-06-27 20:22:09,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66298 conditions, 6233 events. 3784/6233 cut-off events. For 1738169/1738172 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 40477 event pairs, 894 based on Foata normal form. 3/6152 useless extension candidates. Maximal degree in co-relation 66141. Up to 5590 conditions per place. [2024-06-27 20:22:09,759 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 311 selfloop transitions, 29 changer transitions 0/389 dead transitions. [2024-06-27 20:22:09,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 389 transitions, 4471 flow [2024-06-27 20:22:09,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:22:09,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:22:09,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-27 20:22:09,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-27 20:22:09,760 INFO L175 Difference]: Start difference. First operand has 323 places, 363 transitions, 3623 flow. Second operand 8 states and 166 transitions. [2024-06-27 20:22:09,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 389 transitions, 4471 flow [2024-06-27 20:22:12,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 389 transitions, 4374 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 20:22:12,842 INFO L231 Difference]: Finished difference. Result has 325 places, 366 transitions, 3706 flow [2024-06-27 20:22:12,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3526, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3706, PETRI_PLACES=325, PETRI_TRANSITIONS=366} [2024-06-27 20:22:12,843 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 280 predicate places. [2024-06-27 20:22:12,843 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 366 transitions, 3706 flow [2024-06-27 20:22:12,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:12,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:12,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:12,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 20:22:12,844 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:12,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:12,844 INFO L85 PathProgramCache]: Analyzing trace with hash 528760403, now seen corresponding path program 1 times [2024-06-27 20:22:12,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:12,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345351482] [2024-06-27 20:22:12,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:12,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:12,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:13,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:13,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:13,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345351482] [2024-06-27 20:22:13,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345351482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:13,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:13,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:22:13,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156211315] [2024-06-27 20:22:13,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:13,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:22:13,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:13,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:22:13,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:22:13,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:22:13,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 366 transitions, 3706 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:13,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:13,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:22:13,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:15,125 INFO L124 PetriNetUnfolderBase]: 4012/6523 cut-off events. [2024-06-27 20:22:15,125 INFO L125 PetriNetUnfolderBase]: For 1773535/1773538 co-relation queries the response was YES. [2024-06-27 20:22:15,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68600 conditions, 6523 events. 4012/6523 cut-off events. For 1773535/1773538 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 41473 event pairs, 947 based on Foata normal form. 1/6512 useless extension candidates. Maximal degree in co-relation 68442. Up to 6043 conditions per place. [2024-06-27 20:22:15,229 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 344 selfloop transitions, 29 changer transitions 0/392 dead transitions. [2024-06-27 20:22:15,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 392 transitions, 4608 flow [2024-06-27 20:22:15,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:22:15,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:22:15,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 20:22:15,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-27 20:22:15,231 INFO L175 Difference]: Start difference. First operand has 325 places, 366 transitions, 3706 flow. Second operand 8 states and 159 transitions. [2024-06-27 20:22:15,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 392 transitions, 4608 flow [2024-06-27 20:22:17,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 392 transitions, 4450 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-27 20:22:17,604 INFO L231 Difference]: Finished difference. Result has 327 places, 369 transitions, 3716 flow [2024-06-27 20:22:17,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3548, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3716, PETRI_PLACES=327, PETRI_TRANSITIONS=369} [2024-06-27 20:22:17,604 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 282 predicate places. [2024-06-27 20:22:17,605 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 369 transitions, 3716 flow [2024-06-27 20:22:17,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:17,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:17,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:17,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 20:22:17,605 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:17,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:17,605 INFO L85 PathProgramCache]: Analyzing trace with hash 528940141, now seen corresponding path program 1 times [2024-06-27 20:22:17,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:17,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614811053] [2024-06-27 20:22:17,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:17,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:17,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:18,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:18,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:18,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614811053] [2024-06-27 20:22:18,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614811053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:18,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:18,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:22:18,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735334761] [2024-06-27 20:22:18,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:18,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:22:18,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:18,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:22:18,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:22:18,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:22:18,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 369 transitions, 3716 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:18,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:18,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:22:18,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:19,929 INFO L124 PetriNetUnfolderBase]: 3897/6354 cut-off events. [2024-06-27 20:22:19,929 INFO L125 PetriNetUnfolderBase]: For 1792438/1792441 co-relation queries the response was YES. [2024-06-27 20:22:19,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68126 conditions, 6354 events. 3897/6354 cut-off events. For 1792438/1792441 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 40719 event pairs, 930 based on Foata normal form. 3/6281 useless extension candidates. Maximal degree in co-relation 67967. Up to 5866 conditions per place. [2024-06-27 20:22:20,023 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 334 selfloop transitions, 22 changer transitions 0/392 dead transitions. [2024-06-27 20:22:20,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 392 transitions, 4560 flow [2024-06-27 20:22:20,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:22:20,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:22:20,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 20:22:20,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 20:22:20,025 INFO L175 Difference]: Start difference. First operand has 327 places, 369 transitions, 3716 flow. Second operand 8 states and 154 transitions. [2024-06-27 20:22:20,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 392 transitions, 4560 flow [2024-06-27 20:22:22,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 392 transitions, 4414 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-27 20:22:22,602 INFO L231 Difference]: Finished difference. Result has 329 places, 372 transitions, 3708 flow [2024-06-27 20:22:22,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3570, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3708, PETRI_PLACES=329, PETRI_TRANSITIONS=372} [2024-06-27 20:22:22,603 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 284 predicate places. [2024-06-27 20:22:22,603 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 372 transitions, 3708 flow [2024-06-27 20:22:22,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:22,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:22,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:22,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 20:22:22,604 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:22,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:22,604 INFO L85 PathProgramCache]: Analyzing trace with hash 528939893, now seen corresponding path program 2 times [2024-06-27 20:22:22,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:22,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298403074] [2024-06-27 20:22:22,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:22,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:22,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:23,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:23,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:23,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298403074] [2024-06-27 20:22:23,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298403074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:23,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:23,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:22:23,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943609189] [2024-06-27 20:22:23,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:23,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:22:23,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:23,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:22:23,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:22:23,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:22:23,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 372 transitions, 3708 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:23,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:23,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:22:23,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:25,144 INFO L124 PetriNetUnfolderBase]: 4034/6549 cut-off events. [2024-06-27 20:22:25,145 INFO L125 PetriNetUnfolderBase]: For 1832151/1832154 co-relation queries the response was YES. [2024-06-27 20:22:25,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69861 conditions, 6549 events. 4034/6549 cut-off events. For 1832151/1832154 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 41591 event pairs, 946 based on Foata normal form. 1/6538 useless extension candidates. Maximal degree in co-relation 69701. Up to 6061 conditions per place. [2024-06-27 20:22:25,230 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 341 selfloop transitions, 34 changer transitions 0/395 dead transitions. [2024-06-27 20:22:25,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 395 transitions, 4614 flow [2024-06-27 20:22:25,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:22:25,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:22:25,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 20:22:25,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-27 20:22:25,231 INFO L175 Difference]: Start difference. First operand has 329 places, 372 transitions, 3708 flow. Second operand 8 states and 158 transitions. [2024-06-27 20:22:25,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 395 transitions, 4614 flow [2024-06-27 20:22:27,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 395 transitions, 4498 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 20:22:27,929 INFO L231 Difference]: Finished difference. Result has 331 places, 375 transitions, 3778 flow [2024-06-27 20:22:27,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3592, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3778, PETRI_PLACES=331, PETRI_TRANSITIONS=375} [2024-06-27 20:22:27,930 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 286 predicate places. [2024-06-27 20:22:27,930 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 375 transitions, 3778 flow [2024-06-27 20:22:27,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:27,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:27,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:27,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 20:22:27,930 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:27,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:27,931 INFO L85 PathProgramCache]: Analyzing trace with hash 773240095, now seen corresponding path program 4 times [2024-06-27 20:22:27,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:27,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417231881] [2024-06-27 20:22:27,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:27,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:27,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:28,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:28,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:28,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417231881] [2024-06-27 20:22:28,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417231881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:28,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:28,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:22:28,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825170292] [2024-06-27 20:22:28,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:28,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:22:28,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:28,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:22:28,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:22:28,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:22:28,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 375 transitions, 3778 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:28,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:28,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:22:28,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:30,163 INFO L124 PetriNetUnfolderBase]: 3816/6275 cut-off events. [2024-06-27 20:22:30,164 INFO L125 PetriNetUnfolderBase]: For 1855509/1855512 co-relation queries the response was YES. [2024-06-27 20:22:30,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68806 conditions, 6275 events. 3816/6275 cut-off events. For 1855509/1855512 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 40649 event pairs, 892 based on Foata normal form. 3/6194 useless extension candidates. Maximal degree in co-relation 68645. Up to 5615 conditions per place. [2024-06-27 20:22:30,261 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 309 selfloop transitions, 37 changer transitions 0/398 dead transitions. [2024-06-27 20:22:30,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 398 transitions, 4642 flow [2024-06-27 20:22:30,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:22:30,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:22:30,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-27 20:22:30,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-27 20:22:30,262 INFO L175 Difference]: Start difference. First operand has 331 places, 375 transitions, 3778 flow. Second operand 8 states and 164 transitions. [2024-06-27 20:22:30,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 398 transitions, 4642 flow [2024-06-27 20:22:33,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 398 transitions, 4478 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-27 20:22:33,006 INFO L231 Difference]: Finished difference. Result has 333 places, 378 transitions, 3822 flow [2024-06-27 20:22:33,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3614, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3822, PETRI_PLACES=333, PETRI_TRANSITIONS=378} [2024-06-27 20:22:33,006 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 288 predicate places. [2024-06-27 20:22:33,006 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 378 transitions, 3822 flow [2024-06-27 20:22:33,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:33,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:33,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:33,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 20:22:33,007 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:33,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:33,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1344986483, now seen corresponding path program 2 times [2024-06-27 20:22:33,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:33,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908738378] [2024-06-27 20:22:33,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:33,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:33,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:33,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:33,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:33,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908738378] [2024-06-27 20:22:33,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908738378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:33,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:33,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:22:33,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516730228] [2024-06-27 20:22:33,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:33,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:22:33,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:33,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:22:33,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:22:33,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:22:33,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 378 transitions, 3822 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:33,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:33,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:22:33,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:35,349 INFO L124 PetriNetUnfolderBase]: 3920/6390 cut-off events. [2024-06-27 20:22:35,349 INFO L125 PetriNetUnfolderBase]: For 1891713/1891716 co-relation queries the response was YES. [2024-06-27 20:22:35,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70253 conditions, 6390 events. 3920/6390 cut-off events. For 1891713/1891716 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 40957 event pairs, 930 based on Foata normal form. 3/6317 useless extension candidates. Maximal degree in co-relation 70091. Up to 5875 conditions per place. [2024-06-27 20:22:35,440 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 330 selfloop transitions, 37 changer transitions 0/404 dead transitions. [2024-06-27 20:22:35,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 404 transitions, 5047 flow [2024-06-27 20:22:35,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:22:35,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:22:35,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 20:22:35,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 20:22:35,441 INFO L175 Difference]: Start difference. First operand has 333 places, 378 transitions, 3822 flow. Second operand 8 states and 154 transitions. [2024-06-27 20:22:35,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 404 transitions, 5047 flow [2024-06-27 20:22:38,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 404 transitions, 4861 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-27 20:22:38,691 INFO L231 Difference]: Finished difference. Result has 336 places, 386 transitions, 3935 flow [2024-06-27 20:22:38,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3636, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3935, PETRI_PLACES=336, PETRI_TRANSITIONS=386} [2024-06-27 20:22:38,692 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 291 predicate places. [2024-06-27 20:22:38,692 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 386 transitions, 3935 flow [2024-06-27 20:22:38,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:38,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:38,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:38,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 20:22:38,692 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:38,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:38,693 INFO L85 PathProgramCache]: Analyzing trace with hash 765115253, now seen corresponding path program 3 times [2024-06-27 20:22:38,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:38,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147830429] [2024-06-27 20:22:38,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:38,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:38,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:39,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:39,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:39,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147830429] [2024-06-27 20:22:39,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147830429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:39,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:39,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:22:39,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574854785] [2024-06-27 20:22:39,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:39,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:22:39,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:39,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:22:39,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:22:39,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:22:39,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 386 transitions, 3935 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:39,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:39,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:22:39,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:41,202 INFO L124 PetriNetUnfolderBase]: 4067/6596 cut-off events. [2024-06-27 20:22:41,202 INFO L125 PetriNetUnfolderBase]: For 1949529/1949535 co-relation queries the response was YES. [2024-06-27 20:22:41,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72398 conditions, 6596 events. 4067/6596 cut-off events. For 1949529/1949535 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 41904 event pairs, 946 based on Foata normal form. 4/6592 useless extension candidates. Maximal degree in co-relation 72234. Up to 6081 conditions per place. [2024-06-27 20:22:41,292 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 341 selfloop transitions, 46 changer transitions 0/410 dead transitions. [2024-06-27 20:22:41,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 410 transitions, 5237 flow [2024-06-27 20:22:41,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:22:41,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:22:41,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 20:22:41,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-27 20:22:41,294 INFO L175 Difference]: Start difference. First operand has 336 places, 386 transitions, 3935 flow. Second operand 8 states and 156 transitions. [2024-06-27 20:22:41,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 410 transitions, 5237 flow [2024-06-27 20:22:43,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 410 transitions, 5093 flow, removed 56 selfloop flow, removed 4 redundant places. [2024-06-27 20:22:43,875 INFO L231 Difference]: Finished difference. Result has 340 places, 392 transitions, 4127 flow [2024-06-27 20:22:43,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3791, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4127, PETRI_PLACES=340, PETRI_TRANSITIONS=392} [2024-06-27 20:22:43,875 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 295 predicate places. [2024-06-27 20:22:43,875 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 392 transitions, 4127 flow [2024-06-27 20:22:43,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:43,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:43,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:43,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 20:22:43,876 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:43,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:43,876 INFO L85 PathProgramCache]: Analyzing trace with hash 765115067, now seen corresponding path program 5 times [2024-06-27 20:22:43,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:43,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702829273] [2024-06-27 20:22:43,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:43,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:43,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:44,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:44,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:44,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702829273] [2024-06-27 20:22:44,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702829273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:44,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:44,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:22:44,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123806660] [2024-06-27 20:22:44,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:44,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:22:44,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:44,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:22:44,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:22:44,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:22:44,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 392 transitions, 4127 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:44,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:44,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:22:44,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:46,232 INFO L124 PetriNetUnfolderBase]: 3865/6344 cut-off events. [2024-06-27 20:22:46,232 INFO L125 PetriNetUnfolderBase]: For 1993603/1993609 co-relation queries the response was YES. [2024-06-27 20:22:46,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71994 conditions, 6344 events. 3865/6344 cut-off events. For 1993603/1993609 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 41098 event pairs, 892 based on Foata normal form. 6/6270 useless extension candidates. Maximal degree in co-relation 71828. Up to 5641 conditions per place. [2024-06-27 20:22:46,336 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 304 selfloop transitions, 59 changer transitions 0/420 dead transitions. [2024-06-27 20:22:46,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 420 transitions, 5803 flow [2024-06-27 20:22:46,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:22:46,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:22:46,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-27 20:22:46,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-27 20:22:46,337 INFO L175 Difference]: Start difference. First operand has 340 places, 392 transitions, 4127 flow. Second operand 8 states and 164 transitions. [2024-06-27 20:22:46,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 420 transitions, 5803 flow [2024-06-27 20:22:49,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 420 transitions, 5643 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-06-27 20:22:49,450 INFO L231 Difference]: Finished difference. Result has 344 places, 401 transitions, 4493 flow [2024-06-27 20:22:49,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3967, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4493, PETRI_PLACES=344, PETRI_TRANSITIONS=401} [2024-06-27 20:22:49,450 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 299 predicate places. [2024-06-27 20:22:49,451 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 401 transitions, 4493 flow [2024-06-27 20:22:49,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:49,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:49,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:49,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 20:22:49,451 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:49,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:49,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1009415889, now seen corresponding path program 3 times [2024-06-27 20:22:49,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:49,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152053160] [2024-06-27 20:22:49,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:49,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:49,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:50,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:50,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:50,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152053160] [2024-06-27 20:22:50,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152053160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:50,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:50,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:22:50,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706728515] [2024-06-27 20:22:50,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:50,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:22:50,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:50,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:22:50,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:22:50,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:22:50,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 401 transitions, 4493 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:50,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:50,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:22:50,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:51,923 INFO L124 PetriNetUnfolderBase]: 3959/6446 cut-off events. [2024-06-27 20:22:51,923 INFO L125 PetriNetUnfolderBase]: For 2019371/2019374 co-relation queries the response was YES. [2024-06-27 20:22:51,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73234 conditions, 6446 events. 3959/6446 cut-off events. For 2019371/2019374 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 41368 event pairs, 930 based on Foata normal form. 3/6373 useless extension candidates. Maximal degree in co-relation 73066. Up to 5923 conditions per place. [2024-06-27 20:22:52,017 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 345 selfloop transitions, 38 changer transitions 0/422 dead transitions. [2024-06-27 20:22:52,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 422 transitions, 5634 flow [2024-06-27 20:22:52,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:22:52,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:22:52,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 20:22:52,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-27 20:22:52,019 INFO L175 Difference]: Start difference. First operand has 344 places, 401 transitions, 4493 flow. Second operand 8 states and 155 transitions. [2024-06-27 20:22:52,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 422 transitions, 5634 flow [2024-06-27 20:22:55,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 422 transitions, 5446 flow, removed 81 selfloop flow, removed 3 redundant places. [2024-06-27 20:22:55,270 INFO L231 Difference]: Finished difference. Result has 349 places, 404 transitions, 4462 flow [2024-06-27 20:22:55,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4305, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4462, PETRI_PLACES=349, PETRI_TRANSITIONS=404} [2024-06-27 20:22:55,271 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 304 predicate places. [2024-06-27 20:22:55,271 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 404 transitions, 4462 flow [2024-06-27 20:22:55,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:55,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:55,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:55,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 20:22:55,272 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:55,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:55,272 INFO L85 PathProgramCache]: Analyzing trace with hash 765110417, now seen corresponding path program 6 times [2024-06-27 20:22:55,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:55,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752344955] [2024-06-27 20:22:55,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:55,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:55,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:56,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:56,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:56,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752344955] [2024-06-27 20:22:56,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752344955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:56,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:56,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:22:56,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714110857] [2024-06-27 20:22:56,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:56,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:22:56,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:56,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:22:56,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:22:56,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:22:56,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 404 transitions, 4462 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:56,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:56,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:22:56,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:58,052 INFO L124 PetriNetUnfolderBase]: 3867/6346 cut-off events. [2024-06-27 20:22:58,053 INFO L125 PetriNetUnfolderBase]: For 2049054/2049057 co-relation queries the response was YES. [2024-06-27 20:22:58,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72717 conditions, 6346 events. 3867/6346 cut-off events. For 2049054/2049057 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 41103 event pairs, 888 based on Foata normal form. 4/6271 useless extension candidates. Maximal degree in co-relation 72547. Up to 5727 conditions per place. [2024-06-27 20:22:58,142 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 341 selfloop transitions, 22 changer transitions 0/421 dead transitions. [2024-06-27 20:22:58,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 421 transitions, 5230 flow [2024-06-27 20:22:58,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:22:58,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:22:58,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 20:22:58,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-27 20:22:58,143 INFO L175 Difference]: Start difference. First operand has 349 places, 404 transitions, 4462 flow. Second operand 8 states and 158 transitions. [2024-06-27 20:22:58,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 421 transitions, 5230 flow [2024-06-27 20:23:01,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 421 transitions, 5023 flow, removed 76 selfloop flow, removed 5 redundant places. [2024-06-27 20:23:01,051 INFO L231 Difference]: Finished difference. Result has 352 places, 404 transitions, 4305 flow [2024-06-27 20:23:01,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4255, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4305, PETRI_PLACES=352, PETRI_TRANSITIONS=404} [2024-06-27 20:23:01,052 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 307 predicate places. [2024-06-27 20:23:01,052 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 404 transitions, 4305 flow [2024-06-27 20:23:01,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:01,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:01,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:01,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 20:23:01,052 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:01,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:01,053 INFO L85 PathProgramCache]: Analyzing trace with hash 585076184, now seen corresponding path program 1 times [2024-06-27 20:23:01,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:01,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231431728] [2024-06-27 20:23:01,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:01,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:01,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:02,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:02,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:02,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231431728] [2024-06-27 20:23:02,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231431728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:02,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:02,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:23:02,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281731715] [2024-06-27 20:23:02,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:02,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:23:02,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:02,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:23:02,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:23:02,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:23:02,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 404 transitions, 4305 flow. Second operand has 12 states, 12 states have (on average 12.25) internal successors, (147), 12 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:02,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:02,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:23:02,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:04,567 INFO L124 PetriNetUnfolderBase]: 4295/7025 cut-off events. [2024-06-27 20:23:04,568 INFO L125 PetriNetUnfolderBase]: For 2157057/2157063 co-relation queries the response was YES. [2024-06-27 20:23:04,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76860 conditions, 7025 events. 4295/7025 cut-off events. For 2157057/2157063 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 45703 event pairs, 921 based on Foata normal form. 15/7032 useless extension candidates. Maximal degree in co-relation 76689. Up to 5640 conditions per place. [2024-06-27 20:23:04,666 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 331 selfloop transitions, 109 changer transitions 0/464 dead transitions. [2024-06-27 20:23:04,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 464 transitions, 5629 flow [2024-06-27 20:23:04,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:23:04,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:23:04,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 230 transitions. [2024-06-27 20:23:04,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47520661157024796 [2024-06-27 20:23:04,669 INFO L175 Difference]: Start difference. First operand has 352 places, 404 transitions, 4305 flow. Second operand 11 states and 230 transitions. [2024-06-27 20:23:04,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 464 transitions, 5629 flow [2024-06-27 20:23:08,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 464 transitions, 5531 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-27 20:23:08,081 INFO L231 Difference]: Finished difference. Result has 357 places, 418 transitions, 4715 flow [2024-06-27 20:23:08,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4207, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4715, PETRI_PLACES=357, PETRI_TRANSITIONS=418} [2024-06-27 20:23:08,081 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 312 predicate places. [2024-06-27 20:23:08,081 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 418 transitions, 4715 flow [2024-06-27 20:23:08,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.25) internal successors, (147), 12 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:08,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:08,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:08,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 20:23:08,082 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:08,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:08,082 INFO L85 PathProgramCache]: Analyzing trace with hash 764992121, now seen corresponding path program 3 times [2024-06-27 20:23:08,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:08,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931191379] [2024-06-27 20:23:08,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:08,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:08,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:09,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:09,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:09,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931191379] [2024-06-27 20:23:09,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931191379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:09,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:09,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:09,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283296380] [2024-06-27 20:23:09,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:09,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:09,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:09,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:09,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:09,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:23:09,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 418 transitions, 4715 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:09,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:09,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:23:09,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:10,765 INFO L124 PetriNetUnfolderBase]: 4080/6773 cut-off events. [2024-06-27 20:23:10,766 INFO L125 PetriNetUnfolderBase]: For 2136114/2136117 co-relation queries the response was YES. [2024-06-27 20:23:10,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76490 conditions, 6773 events. 4080/6773 cut-off events. For 2136114/2136117 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 45049 event pairs, 914 based on Foata normal form. 5/6699 useless extension candidates. Maximal degree in co-relation 76318. Up to 6091 conditions per place. [2024-06-27 20:23:10,875 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 359 selfloop transitions, 21 changer transitions 0/438 dead transitions. [2024-06-27 20:23:10,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 438 transitions, 5603 flow [2024-06-27 20:23:10,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:10,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:10,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 20:23:10,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-27 20:23:10,877 INFO L175 Difference]: Start difference. First operand has 357 places, 418 transitions, 4715 flow. Second operand 8 states and 158 transitions. [2024-06-27 20:23:10,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 438 transitions, 5603 flow [2024-06-27 20:23:14,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 438 transitions, 5365 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 20:23:14,834 INFO L231 Difference]: Finished difference. Result has 359 places, 420 transitions, 4612 flow [2024-06-27 20:23:14,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4477, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4612, PETRI_PLACES=359, PETRI_TRANSITIONS=420} [2024-06-27 20:23:14,834 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 314 predicate places. [2024-06-27 20:23:14,834 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 420 transitions, 4612 flow [2024-06-27 20:23:14,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:14,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:14,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:14,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 20:23:14,835 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:14,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:14,836 INFO L85 PathProgramCache]: Analyzing trace with hash 765423083, now seen corresponding path program 1 times [2024-06-27 20:23:14,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:14,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96246700] [2024-06-27 20:23:14,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:14,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:14,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:15,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:15,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:15,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96246700] [2024-06-27 20:23:15,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96246700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:15,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:15,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:23:15,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123751999] [2024-06-27 20:23:15,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:15,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:23:15,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:15,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:23:15,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:23:15,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:23:15,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 420 transitions, 4612 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:15,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:15,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:23:15,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:17,370 INFO L124 PetriNetUnfolderBase]: 3999/6675 cut-off events. [2024-06-27 20:23:17,370 INFO L125 PetriNetUnfolderBase]: For 2145142/2145172 co-relation queries the response was YES. [2024-06-27 20:23:17,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75122 conditions, 6675 events. 3999/6675 cut-off events. For 2145142/2145172 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 44665 event pairs, 935 based on Foata normal form. 5/6588 useless extension candidates. Maximal degree in co-relation 74949. Up to 5892 conditions per place. [2024-06-27 20:23:17,487 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 335 selfloop transitions, 29 changer transitions 0/441 dead transitions. [2024-06-27 20:23:17,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 441 transitions, 5464 flow [2024-06-27 20:23:17,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:23:17,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:23:17,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 20:23:17,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43434343434343436 [2024-06-27 20:23:17,488 INFO L175 Difference]: Start difference. First operand has 359 places, 420 transitions, 4612 flow. Second operand 9 states and 172 transitions. [2024-06-27 20:23:17,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 441 transitions, 5464 flow [2024-06-27 20:23:21,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 441 transitions, 5345 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-27 20:23:21,155 INFO L231 Difference]: Finished difference. Result has 362 places, 423 transitions, 4643 flow [2024-06-27 20:23:21,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4493, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4643, PETRI_PLACES=362, PETRI_TRANSITIONS=423} [2024-06-27 20:23:21,155 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 317 predicate places. [2024-06-27 20:23:21,156 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 423 transitions, 4643 flow [2024-06-27 20:23:21,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:21,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:21,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:21,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 20:23:21,156 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:21,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:21,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1046719463, now seen corresponding path program 7 times [2024-06-27 20:23:21,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:21,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186672894] [2024-06-27 20:23:21,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:21,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:21,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:21,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:21,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:21,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186672894] [2024-06-27 20:23:21,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186672894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:21,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:21,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:21,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926638958] [2024-06-27 20:23:21,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:21,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:21,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:21,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:21,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:21,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:23:21,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 423 transitions, 4643 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:21,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:21,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:23:21,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:23,669 INFO L124 PetriNetUnfolderBase]: 4105/6807 cut-off events. [2024-06-27 20:23:23,670 INFO L125 PetriNetUnfolderBase]: For 2167451/2167457 co-relation queries the response was YES. [2024-06-27 20:23:23,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77160 conditions, 6807 events. 4105/6807 cut-off events. For 2167451/2167457 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 45175 event pairs, 929 based on Foata normal form. 4/6728 useless extension candidates. Maximal degree in co-relation 76986. Up to 6070 conditions per place. [2024-06-27 20:23:23,775 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 359 selfloop transitions, 29 changer transitions 0/446 dead transitions. [2024-06-27 20:23:23,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 446 transitions, 5591 flow [2024-06-27 20:23:23,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:23,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:23,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-27 20:23:23,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630681818181818 [2024-06-27 20:23:23,776 INFO L175 Difference]: Start difference. First operand has 362 places, 423 transitions, 4643 flow. Second operand 8 states and 163 transitions. [2024-06-27 20:23:23,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 446 transitions, 5591 flow [2024-06-27 20:23:27,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 446 transitions, 5463 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-27 20:23:27,508 INFO L231 Difference]: Finished difference. Result has 363 places, 426 transitions, 4707 flow [2024-06-27 20:23:27,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4515, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4707, PETRI_PLACES=363, PETRI_TRANSITIONS=426} [2024-06-27 20:23:27,508 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 318 predicate places. [2024-06-27 20:23:27,508 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 426 transitions, 4707 flow [2024-06-27 20:23:27,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:27,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:27,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:27,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 20:23:27,509 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:27,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:27,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1712852569, now seen corresponding path program 4 times [2024-06-27 20:23:27,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:27,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998685122] [2024-06-27 20:23:27,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:27,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:27,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:28,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:28,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:28,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998685122] [2024-06-27 20:23:28,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998685122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:28,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:28,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:28,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539161467] [2024-06-27 20:23:28,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:28,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:28,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:28,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:28,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:28,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:23:28,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 426 transitions, 4707 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:28,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:28,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:23:28,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:30,094 INFO L124 PetriNetUnfolderBase]: 4323/7080 cut-off events. [2024-06-27 20:23:30,095 INFO L125 PetriNetUnfolderBase]: For 2205326/2205335 co-relation queries the response was YES. [2024-06-27 20:23:30,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79009 conditions, 7080 events. 4323/7080 cut-off events. For 2205326/2205335 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 46073 event pairs, 972 based on Foata normal form. 8/7079 useless extension candidates. Maximal degree in co-relation 78834. Up to 6532 conditions per place. [2024-06-27 20:23:30,198 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 396 selfloop transitions, 29 changer transitions 0/449 dead transitions. [2024-06-27 20:23:30,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 449 transitions, 5711 flow [2024-06-27 20:23:30,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:30,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:30,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 20:23:30,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-27 20:23:30,200 INFO L175 Difference]: Start difference. First operand has 363 places, 426 transitions, 4707 flow. Second operand 8 states and 156 transitions. [2024-06-27 20:23:30,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 449 transitions, 5711 flow [2024-06-27 20:23:34,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 449 transitions, 5547 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-27 20:23:34,562 INFO L231 Difference]: Finished difference. Result has 365 places, 429 transitions, 4717 flow [2024-06-27 20:23:34,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4543, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4717, PETRI_PLACES=365, PETRI_TRANSITIONS=429} [2024-06-27 20:23:34,562 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 320 predicate places. [2024-06-27 20:23:34,562 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 429 transitions, 4717 flow [2024-06-27 20:23:34,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:34,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:34,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:34,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 20:23:34,563 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:34,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:34,563 INFO L85 PathProgramCache]: Analyzing trace with hash -2083407947, now seen corresponding path program 8 times [2024-06-27 20:23:34,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:34,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066252108] [2024-06-27 20:23:34,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:34,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:34,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:35,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:35,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:35,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066252108] [2024-06-27 20:23:35,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066252108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:35,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:35,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:35,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763967344] [2024-06-27 20:23:35,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:35,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:35,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:35,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:35,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:35,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:23:35,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 429 transitions, 4717 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:35,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:35,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:23:35,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:37,189 INFO L124 PetriNetUnfolderBase]: 4107/6800 cut-off events. [2024-06-27 20:23:37,189 INFO L125 PetriNetUnfolderBase]: For 2219989/2219995 co-relation queries the response was YES. [2024-06-27 20:23:37,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77361 conditions, 6800 events. 4107/6800 cut-off events. For 2219989/2219995 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 45043 event pairs, 929 based on Foata normal form. 4/6721 useless extension candidates. Maximal degree in co-relation 77185. Up to 6065 conditions per place. [2024-06-27 20:23:37,289 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 353 selfloop transitions, 34 changer transitions 0/446 dead transitions. [2024-06-27 20:23:37,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 446 transitions, 5533 flow [2024-06-27 20:23:37,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:37,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:37,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-27 20:23:37,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-06-27 20:23:37,290 INFO L175 Difference]: Start difference. First operand has 365 places, 429 transitions, 4717 flow. Second operand 8 states and 162 transitions. [2024-06-27 20:23:37,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 446 transitions, 5533 flow [2024-06-27 20:23:41,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 446 transitions, 5315 flow, removed 82 selfloop flow, removed 6 redundant places. [2024-06-27 20:23:41,580 INFO L231 Difference]: Finished difference. Result has 367 places, 429 transitions, 4573 flow [2024-06-27 20:23:41,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4499, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4573, PETRI_PLACES=367, PETRI_TRANSITIONS=429} [2024-06-27 20:23:41,581 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 322 predicate places. [2024-06-27 20:23:41,581 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 429 transitions, 4573 flow [2024-06-27 20:23:41,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:41,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:41,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:41,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 20:23:41,582 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:41,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:41,582 INFO L85 PathProgramCache]: Analyzing trace with hash -157447787, now seen corresponding path program 5 times [2024-06-27 20:23:41,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:41,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564384917] [2024-06-27 20:23:41,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:41,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:41,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:42,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:42,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:42,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564384917] [2024-06-27 20:23:42,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564384917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:42,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:42,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:42,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529468908] [2024-06-27 20:23:42,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:42,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:42,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:42,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:42,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:42,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:23:42,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 429 transitions, 4573 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:42,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:42,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:23:42,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:44,391 INFO L124 PetriNetUnfolderBase]: 4325/7083 cut-off events. [2024-06-27 20:23:44,392 INFO L125 PetriNetUnfolderBase]: For 2256605/2256614 co-relation queries the response was YES. [2024-06-27 20:23:44,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79152 conditions, 7083 events. 4325/7083 cut-off events. For 2256605/2256614 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 46141 event pairs, 972 based on Foata normal form. 8/7082 useless extension candidates. Maximal degree in co-relation 78975. Up to 6525 conditions per place. [2024-06-27 20:23:44,500 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 389 selfloop transitions, 37 changer transitions 0/450 dead transitions. [2024-06-27 20:23:44,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 450 transitions, 5851 flow [2024-06-27 20:23:44,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:44,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:44,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 20:23:44,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-27 20:23:44,501 INFO L175 Difference]: Start difference. First operand has 367 places, 429 transitions, 4573 flow. Second operand 8 states and 155 transitions. [2024-06-27 20:23:44,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 450 transitions, 5851 flow [2024-06-27 20:23:48,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 450 transitions, 5709 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-27 20:23:48,978 INFO L231 Difference]: Finished difference. Result has 368 places, 432 transitions, 4621 flow [2024-06-27 20:23:48,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4431, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4621, PETRI_PLACES=368, PETRI_TRANSITIONS=432} [2024-06-27 20:23:48,984 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 323 predicate places. [2024-06-27 20:23:48,984 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 432 transitions, 4621 flow [2024-06-27 20:23:48,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:48,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:48,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:48,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 20:23:48,984 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:48,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:48,985 INFO L85 PathProgramCache]: Analyzing trace with hash -186970699, now seen corresponding path program 6 times [2024-06-27 20:23:48,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:48,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337444463] [2024-06-27 20:23:48,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:48,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:48,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:49,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:49,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:49,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337444463] [2024-06-27 20:23:49,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337444463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:49,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:49,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:49,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800596950] [2024-06-27 20:23:49,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:49,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:49,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:49,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:49,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:49,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:23:49,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 432 transitions, 4621 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:49,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:49,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:23:49,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:51,494 INFO L124 PetriNetUnfolderBase]: 4322/7079 cut-off events. [2024-06-27 20:23:51,495 INFO L125 PetriNetUnfolderBase]: For 2278612/2278621 co-relation queries the response was YES. [2024-06-27 20:23:51,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79146 conditions, 7079 events. 4322/7079 cut-off events. For 2278612/2278621 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 46081 event pairs, 972 based on Foata normal form. 8/7078 useless extension candidates. Maximal degree in co-relation 78968. Up to 6531 conditions per place. [2024-06-27 20:23:51,617 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 398 selfloop transitions, 30 changer transitions 0/452 dead transitions. [2024-06-27 20:23:51,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 452 transitions, 5527 flow [2024-06-27 20:23:51,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:51,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:51,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 20:23:51,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-27 20:23:51,618 INFO L175 Difference]: Start difference. First operand has 368 places, 432 transitions, 4621 flow. Second operand 8 states and 155 transitions. [2024-06-27 20:23:51,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 452 transitions, 5527 flow [2024-06-27 20:23:56,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 452 transitions, 5257 flow, removed 92 selfloop flow, removed 6 redundant places. [2024-06-27 20:23:56,920 INFO L231 Difference]: Finished difference. Result has 370 places, 432 transitions, 4417 flow [2024-06-27 20:23:56,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4351, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4417, PETRI_PLACES=370, PETRI_TRANSITIONS=432} [2024-06-27 20:23:56,921 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 325 predicate places. [2024-06-27 20:23:56,921 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 432 transitions, 4417 flow [2024-06-27 20:23:56,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:56,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:56,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:56,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 20:23:56,921 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:56,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:56,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1399055777, now seen corresponding path program 7 times [2024-06-27 20:23:56,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:56,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516779785] [2024-06-27 20:23:56,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:56,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:56,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:57,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:57,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:57,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516779785] [2024-06-27 20:23:57,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516779785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:57,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:57,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:57,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429585084] [2024-06-27 20:23:57,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:57,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:57,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:57,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:57,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:57,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:23:57,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 432 transitions, 4417 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:57,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:57,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:23:57,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:59,522 INFO L124 PetriNetUnfolderBase]: 4327/7086 cut-off events. [2024-06-27 20:23:59,522 INFO L125 PetriNetUnfolderBase]: For 2309199/2309208 co-relation queries the response was YES. [2024-06-27 20:23:59,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79324 conditions, 7086 events. 4327/7086 cut-off events. For 2309199/2309208 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 46177 event pairs, 972 based on Foata normal form. 8/7085 useless extension candidates. Maximal degree in co-relation 79145. Up to 6526 conditions per place. [2024-06-27 20:23:59,644 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 387 selfloop transitions, 41 changer transitions 0/452 dead transitions. [2024-06-27 20:23:59,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 452 transitions, 5441 flow [2024-06-27 20:23:59,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:59,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:59,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:23:59,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-27 20:23:59,645 INFO L175 Difference]: Start difference. First operand has 370 places, 432 transitions, 4417 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:23:59,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 452 transitions, 5441 flow [2024-06-27 20:24:04,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 452 transitions, 5361 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 20:24:04,781 INFO L231 Difference]: Finished difference. Result has 371 places, 435 transitions, 4557 flow [2024-06-27 20:24:04,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4337, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4557, PETRI_PLACES=371, PETRI_TRANSITIONS=435} [2024-06-27 20:24:04,781 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 326 predicate places. [2024-06-27 20:24:04,782 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 435 transitions, 4557 flow [2024-06-27 20:24:04,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:04,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:04,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:04,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 20:24:04,782 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:04,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:04,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1640109669, now seen corresponding path program 4 times [2024-06-27 20:24:04,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:04,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097531870] [2024-06-27 20:24:04,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:04,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:04,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:05,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:05,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:05,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097531870] [2024-06-27 20:24:05,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097531870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:05,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:05,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:24:05,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711839293] [2024-06-27 20:24:05,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:05,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:24:05,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:05,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:24:05,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:24:05,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:24:05,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 435 transitions, 4557 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:05,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:05,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:24:05,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:07,185 INFO L124 PetriNetUnfolderBase]: 4200/6912 cut-off events. [2024-06-27 20:24:07,186 INFO L125 PetriNetUnfolderBase]: For 2315191/2315197 co-relation queries the response was YES. [2024-06-27 20:24:07,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78588 conditions, 6912 events. 4200/6912 cut-off events. For 2315191/2315197 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 45505 event pairs, 958 based on Foata normal form. 5/6840 useless extension candidates. Maximal degree in co-relation 78408. Up to 6333 conditions per place. [2024-06-27 20:24:07,303 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 389 selfloop transitions, 22 changer transitions 0/453 dead transitions. [2024-06-27 20:24:07,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 453 transitions, 5445 flow [2024-06-27 20:24:07,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:24:07,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:24:07,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:24:07,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-27 20:24:07,305 INFO L175 Difference]: Start difference. First operand has 371 places, 435 transitions, 4557 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:24:07,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 453 transitions, 5445 flow [2024-06-27 20:24:11,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 453 transitions, 5181 flow, removed 93 selfloop flow, removed 6 redundant places. [2024-06-27 20:24:11,671 INFO L231 Difference]: Finished difference. Result has 373 places, 436 transitions, 4369 flow [2024-06-27 20:24:11,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4309, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4369, PETRI_PLACES=373, PETRI_TRANSITIONS=436} [2024-06-27 20:24:11,672 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 328 predicate places. [2024-06-27 20:24:11,672 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 436 transitions, 4369 flow [2024-06-27 20:24:11,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:11,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:11,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:11,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 20:24:11,672 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:11,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:11,673 INFO L85 PathProgramCache]: Analyzing trace with hash -633054099, now seen corresponding path program 5 times [2024-06-27 20:24:11,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:11,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393336809] [2024-06-27 20:24:11,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:11,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:11,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:12,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:12,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:12,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393336809] [2024-06-27 20:24:12,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393336809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:12,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:12,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:24:12,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868903468] [2024-06-27 20:24:12,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:12,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:24:12,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:12,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:24:12,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:24:12,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:24:12,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 436 transitions, 4369 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:12,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:12,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:24:12,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:14,313 INFO L124 PetriNetUnfolderBase]: 4213/6920 cut-off events. [2024-06-27 20:24:14,314 INFO L125 PetriNetUnfolderBase]: For 2356383/2356389 co-relation queries the response was YES. [2024-06-27 20:24:14,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79000 conditions, 6920 events. 4213/6920 cut-off events. For 2356383/2356389 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 45435 event pairs, 958 based on Foata normal form. 5/6848 useless extension candidates. Maximal degree in co-relation 78819. Up to 6329 conditions per place. [2024-06-27 20:24:14,432 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 376 selfloop transitions, 39 changer transitions 0/457 dead transitions. [2024-06-27 20:24:14,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 457 transitions, 5723 flow [2024-06-27 20:24:14,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:24:14,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:24:14,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 20:24:14,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-27 20:24:14,434 INFO L175 Difference]: Start difference. First operand has 373 places, 436 transitions, 4369 flow. Second operand 8 states and 152 transitions. [2024-06-27 20:24:14,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 457 transitions, 5723 flow [2024-06-27 20:24:19,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 457 transitions, 5673 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 20:24:19,429 INFO L231 Difference]: Finished difference. Result has 375 places, 442 transitions, 4617 flow [2024-06-27 20:24:19,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4319, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4617, PETRI_PLACES=375, PETRI_TRANSITIONS=442} [2024-06-27 20:24:19,429 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 330 predicate places. [2024-06-27 20:24:19,430 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 442 transitions, 4617 flow [2024-06-27 20:24:19,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:19,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:19,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:19,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 20:24:19,430 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:19,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:19,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1226803223, now seen corresponding path program 9 times [2024-06-27 20:24:19,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:19,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502781947] [2024-06-27 20:24:19,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:19,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:19,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:20,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:20,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:20,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502781947] [2024-06-27 20:24:20,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502781947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:20,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:20,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:24:20,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997208885] [2024-06-27 20:24:20,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:20,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:24:20,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:20,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:24:20,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:24:20,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:24:20,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 442 transitions, 4617 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:20,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:20,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:24:20,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:21,952 INFO L124 PetriNetUnfolderBase]: 4129/6833 cut-off events. [2024-06-27 20:24:21,952 INFO L125 PetriNetUnfolderBase]: For 2404524/2404530 co-relation queries the response was YES. [2024-06-27 20:24:22,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79247 conditions, 6833 events. 4129/6833 cut-off events. For 2404524/2404530 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 45286 event pairs, 929 based on Foata normal form. 4/6754 useless extension candidates. Maximal degree in co-relation 79065. Up to 6068 conditions per place. [2024-06-27 20:24:22,065 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 344 selfloop transitions, 52 changer transitions 0/459 dead transitions. [2024-06-27 20:24:22,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 459 transitions, 5589 flow [2024-06-27 20:24:22,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:24:22,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:24:22,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 20:24:22,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-27 20:24:22,067 INFO L175 Difference]: Start difference. First operand has 375 places, 442 transitions, 4617 flow. Second operand 8 states and 159 transitions. [2024-06-27 20:24:22,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 459 transitions, 5589 flow [2024-06-27 20:24:27,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 459 transitions, 5421 flow, removed 66 selfloop flow, removed 4 redundant places. [2024-06-27 20:24:27,698 INFO L231 Difference]: Finished difference. Result has 379 places, 445 transitions, 4711 flow [2024-06-27 20:24:27,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4449, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4711, PETRI_PLACES=379, PETRI_TRANSITIONS=445} [2024-06-27 20:24:27,698 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 334 predicate places. [2024-06-27 20:24:27,698 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 445 transitions, 4711 flow [2024-06-27 20:24:27,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:27,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:27,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:27,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 20:24:27,699 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:27,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:27,699 INFO L85 PathProgramCache]: Analyzing trace with hash -632817197, now seen corresponding path program 8 times [2024-06-27 20:24:27,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:27,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514700806] [2024-06-27 20:24:27,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:27,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:27,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:28,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:28,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:28,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514700806] [2024-06-27 20:24:28,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514700806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:28,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:28,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:24:28,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140304744] [2024-06-27 20:24:28,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:28,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:24:28,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:28,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:24:28,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:24:28,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:24:28,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 445 transitions, 4711 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:28,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:28,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:24:28,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:30,378 INFO L124 PetriNetUnfolderBase]: 4355/7127 cut-off events. [2024-06-27 20:24:30,379 INFO L125 PetriNetUnfolderBase]: For 2459311/2459320 co-relation queries the response was YES. [2024-06-27 20:24:30,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82034 conditions, 7127 events. 4355/7127 cut-off events. For 2459311/2459320 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 46441 event pairs, 972 based on Foata normal form. 8/7126 useless extension candidates. Maximal degree in co-relation 81850. Up to 6533 conditions per place. [2024-06-27 20:24:30,494 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 377 selfloop transitions, 63 changer transitions 0/466 dead transitions. [2024-06-27 20:24:30,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 466 transitions, 6183 flow [2024-06-27 20:24:30,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:24:30,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:24:30,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:24:30,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-27 20:24:30,495 INFO L175 Difference]: Start difference. First operand has 379 places, 445 transitions, 4711 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:24:30,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 466 transitions, 6183 flow [2024-06-27 20:24:35,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 466 transitions, 5943 flow, removed 70 selfloop flow, removed 6 redundant places. [2024-06-27 20:24:35,356 INFO L231 Difference]: Finished difference. Result has 381 places, 451 transitions, 4881 flow [2024-06-27 20:24:35,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4471, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4881, PETRI_PLACES=381, PETRI_TRANSITIONS=451} [2024-06-27 20:24:35,356 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 336 predicate places. [2024-06-27 20:24:35,356 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 451 transitions, 4881 flow [2024-06-27 20:24:35,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:35,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:35,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:35,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 20:24:35,357 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:35,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:35,357 INFO L85 PathProgramCache]: Analyzing trace with hash -633054347, now seen corresponding path program 9 times [2024-06-27 20:24:35,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:35,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461268950] [2024-06-27 20:24:35,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:35,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:35,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:36,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:36,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:36,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461268950] [2024-06-27 20:24:36,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461268950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:36,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:36,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:24:36,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685204850] [2024-06-27 20:24:36,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:36,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:24:36,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:36,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:24:36,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:24:36,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:24:36,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 451 transitions, 4881 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:36,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:36,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:24:36,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:37,957 INFO L124 PetriNetUnfolderBase]: 4352/7133 cut-off events. [2024-06-27 20:24:37,958 INFO L125 PetriNetUnfolderBase]: For 2485507/2485516 co-relation queries the response was YES. [2024-06-27 20:24:38,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82278 conditions, 7133 events. 4352/7133 cut-off events. For 2485507/2485516 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 46595 event pairs, 972 based on Foata normal form. 8/7132 useless extension candidates. Maximal degree in co-relation 82093. Up to 6530 conditions per place. [2024-06-27 20:24:38,075 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 377 selfloop transitions, 62 changer transitions 0/465 dead transitions. [2024-06-27 20:24:38,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 465 transitions, 5793 flow [2024-06-27 20:24:38,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:24:38,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:24:38,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 20:24:38,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-27 20:24:38,076 INFO L175 Difference]: Start difference. First operand has 381 places, 451 transitions, 4881 flow. Second operand 8 states and 152 transitions. [2024-06-27 20:24:38,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 465 transitions, 5793 flow [2024-06-27 20:24:43,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 465 transitions, 5493 flow, removed 121 selfloop flow, removed 4 redundant places. [2024-06-27 20:24:43,259 INFO L231 Difference]: Finished difference. Result has 385 places, 451 transitions, 4711 flow [2024-06-27 20:24:43,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4581, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4711, PETRI_PLACES=385, PETRI_TRANSITIONS=451} [2024-06-27 20:24:43,260 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 340 predicate places. [2024-06-27 20:24:43,260 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 451 transitions, 4711 flow [2024-06-27 20:24:43,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:43,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:43,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:43,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 20:24:43,261 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:43,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:43,261 INFO L85 PathProgramCache]: Analyzing trace with hash -632578869, now seen corresponding path program 6 times [2024-06-27 20:24:43,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:43,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132505934] [2024-06-27 20:24:43,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:43,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:43,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:44,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:44,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:44,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132505934] [2024-06-27 20:24:44,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132505934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:44,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:44,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:24:44,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031260012] [2024-06-27 20:24:44,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:44,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:24:44,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:44,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:24:44,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:24:44,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:24:44,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 451 transitions, 4711 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:44,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:44,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:24:44,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:45,768 INFO L124 PetriNetUnfolderBase]: 4225/6939 cut-off events. [2024-06-27 20:24:45,769 INFO L125 PetriNetUnfolderBase]: For 2486672/2486678 co-relation queries the response was YES. [2024-06-27 20:24:45,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81049 conditions, 6939 events. 4225/6939 cut-off events. For 2486672/2486678 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 45542 event pairs, 958 based on Foata normal form. 5/6867 useless extension candidates. Maximal degree in co-relation 80862. Up to 6343 conditions per place. [2024-06-27 20:24:45,881 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 380 selfloop transitions, 41 changer transitions 0/465 dead transitions. [2024-06-27 20:24:45,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 465 transitions, 5587 flow [2024-06-27 20:24:45,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:24:45,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:24:45,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:24:45,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-27 20:24:45,883 INFO L175 Difference]: Start difference. First operand has 385 places, 451 transitions, 4711 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:24:45,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 465 transitions, 5587 flow [2024-06-27 20:24:50,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 465 transitions, 5377 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-27 20:24:50,955 INFO L231 Difference]: Finished difference. Result has 386 places, 451 transitions, 4589 flow [2024-06-27 20:24:50,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4501, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4589, PETRI_PLACES=386, PETRI_TRANSITIONS=451} [2024-06-27 20:24:50,955 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 341 predicate places. [2024-06-27 20:24:50,955 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 451 transitions, 4589 flow [2024-06-27 20:24:50,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:50,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:50,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:50,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 20:24:50,956 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:50,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:50,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1301324597, now seen corresponding path program 7 times [2024-06-27 20:24:50,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:50,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442318139] [2024-06-27 20:24:50,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:50,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:50,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:51,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:51,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:51,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442318139] [2024-06-27 20:24:51,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442318139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:51,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:51,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:24:51,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841762636] [2024-06-27 20:24:51,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:51,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:24:51,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:51,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:24:51,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:24:51,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:24:51,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 451 transitions, 4589 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:51,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:51,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:24:51,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:53,580 INFO L124 PetriNetUnfolderBase]: 4238/6969 cut-off events. [2024-06-27 20:24:53,580 INFO L125 PetriNetUnfolderBase]: For 2531828/2531837 co-relation queries the response was YES. [2024-06-27 20:24:53,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81617 conditions, 6969 events. 4238/6969 cut-off events. For 2531828/2531837 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 45869 event pairs, 966 based on Foata normal form. 7/6897 useless extension candidates. Maximal degree in co-relation 81429. Up to 6299 conditions per place. [2024-06-27 20:24:53,692 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 354 selfloop transitions, 80 changer transitions 0/478 dead transitions. [2024-06-27 20:24:53,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 478 transitions, 6475 flow [2024-06-27 20:24:53,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:24:53,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:24:53,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:24:53,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-27 20:24:53,693 INFO L175 Difference]: Start difference. First operand has 386 places, 451 transitions, 4589 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:24:53,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 478 transitions, 6475 flow [2024-06-27 20:24:58,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 478 transitions, 6381 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 20:24:58,939 INFO L231 Difference]: Finished difference. Result has 388 places, 465 transitions, 5124 flow [2024-06-27 20:24:58,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4495, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5124, PETRI_PLACES=388, PETRI_TRANSITIONS=465} [2024-06-27 20:24:58,939 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 343 predicate places. [2024-06-27 20:24:58,939 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 465 transitions, 5124 flow [2024-06-27 20:24:58,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:58,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:58,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:58,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 20:24:58,940 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:58,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:58,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1301562925, now seen corresponding path program 10 times [2024-06-27 20:24:58,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:58,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170043237] [2024-06-27 20:24:58,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:58,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:58,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:59,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:59,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:59,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170043237] [2024-06-27 20:24:59,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170043237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:59,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:59,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:24:59,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119849418] [2024-06-27 20:24:59,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:59,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:24:59,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:59,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:24:59,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:24:59,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:24:59,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 465 transitions, 5124 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:59,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:59,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:24:59,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:01,588 INFO L124 PetriNetUnfolderBase]: 4372/7165 cut-off events. [2024-06-27 20:25:01,588 INFO L125 PetriNetUnfolderBase]: For 2584027/2584036 co-relation queries the response was YES. [2024-06-27 20:25:01,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83742 conditions, 7165 events. 4372/7165 cut-off events. For 2584027/2584036 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 46879 event pairs, 1000 based on Foata normal form. 5/7163 useless extension candidates. Maximal degree in co-relation 83552. Up to 6516 conditions per place. [2024-06-27 20:25:01,709 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 365 selfloop transitions, 87 changer transitions 0/483 dead transitions. [2024-06-27 20:25:01,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 483 transitions, 6636 flow [2024-06-27 20:25:01,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:25:01,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:25:01,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 20:25:01,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-27 20:25:01,711 INFO L175 Difference]: Start difference. First operand has 388 places, 465 transitions, 5124 flow. Second operand 8 states and 152 transitions. [2024-06-27 20:25:01,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 483 transitions, 6636 flow [2024-06-27 20:25:06,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 483 transitions, 6416 flow, removed 103 selfloop flow, removed 2 redundant places. [2024-06-27 20:25:06,523 INFO L231 Difference]: Finished difference. Result has 394 places, 471 transitions, 5378 flow [2024-06-27 20:25:06,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4912, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5378, PETRI_PLACES=394, PETRI_TRANSITIONS=471} [2024-06-27 20:25:06,524 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 349 predicate places. [2024-06-27 20:25:06,524 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 471 transitions, 5378 flow [2024-06-27 20:25:06,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:06,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:06,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:06,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 20:25:06,524 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:25:06,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:06,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1301799827, now seen corresponding path program 8 times [2024-06-27 20:25:06,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:06,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493669186] [2024-06-27 20:25:06,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:06,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:06,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:07,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:07,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:07,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493669186] [2024-06-27 20:25:07,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493669186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:07,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:07,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:25:07,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870703362] [2024-06-27 20:25:07,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:07,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:25:07,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:07,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:25:07,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:25:07,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:25:07,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 471 transitions, 5378 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:07,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:07,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:25:07,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:09,270 INFO L124 PetriNetUnfolderBase]: 4256/6992 cut-off events. [2024-06-27 20:25:09,270 INFO L125 PetriNetUnfolderBase]: For 2609588/2609597 co-relation queries the response was YES. [2024-06-27 20:25:09,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82725 conditions, 6992 events. 4256/6992 cut-off events. For 2609588/2609597 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 46042 event pairs, 966 based on Foata normal form. 7/6920 useless extension candidates. Maximal degree in co-relation 82533. Up to 6319 conditions per place. [2024-06-27 20:25:09,383 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 359 selfloop transitions, 85 changer transitions 0/490 dead transitions. [2024-06-27 20:25:09,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 490 transitions, 7068 flow [2024-06-27 20:25:09,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:25:09,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:25:09,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:25:09,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-27 20:25:09,385 INFO L175 Difference]: Start difference. First operand has 394 places, 471 transitions, 5378 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:25:09,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 490 transitions, 7068 flow [2024-06-27 20:25:13,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 490 transitions, 6816 flow, removed 82 selfloop flow, removed 4 redundant places. [2024-06-27 20:25:13,804 INFO L231 Difference]: Finished difference. Result has 398 places, 477 transitions, 5486 flow [2024-06-27 20:25:13,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5126, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5486, PETRI_PLACES=398, PETRI_TRANSITIONS=477} [2024-06-27 20:25:13,805 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 353 predicate places. [2024-06-27 20:25:13,805 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 477 transitions, 5486 flow [2024-06-27 20:25:13,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:13,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:13,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:13,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-27 20:25:13,805 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:25:13,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:13,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1021938647, now seen corresponding path program 9 times [2024-06-27 20:25:13,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:13,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44737844] [2024-06-27 20:25:13,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:13,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:13,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:14,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:14,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:14,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44737844] [2024-06-27 20:25:14,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44737844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:14,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:14,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:25:14,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042514994] [2024-06-27 20:25:14,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:14,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:25:14,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:14,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:25:14,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:25:14,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:25:14,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 477 transitions, 5486 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:14,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:14,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:25:14,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:16,616 INFO L124 PetriNetUnfolderBase]: 4261/6989 cut-off events. [2024-06-27 20:25:16,616 INFO L125 PetriNetUnfolderBase]: For 2642197/2642206 co-relation queries the response was YES. [2024-06-27 20:25:16,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83062 conditions, 6989 events. 4261/6989 cut-off events. For 2642197/2642206 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 45892 event pairs, 963 based on Foata normal form. 7/6917 useless extension candidates. Maximal degree in co-relation 82868. Up to 6325 conditions per place. [2024-06-27 20:25:16,733 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 354 selfloop transitions, 94 changer transitions 0/494 dead transitions. [2024-06-27 20:25:16,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 494 transitions, 7129 flow [2024-06-27 20:25:16,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:25:16,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:25:16,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 20:25:16,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-27 20:25:16,734 INFO L175 Difference]: Start difference. First operand has 398 places, 477 transitions, 5486 flow. Second operand 8 states and 152 transitions. [2024-06-27 20:25:16,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 494 transitions, 7129 flow [2024-06-27 20:25:23,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 494 transitions, 6907 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-27 20:25:23,365 INFO L231 Difference]: Finished difference. Result has 402 places, 481 transitions, 5583 flow [2024-06-27 20:25:23,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5269, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5583, PETRI_PLACES=402, PETRI_TRANSITIONS=481} [2024-06-27 20:25:23,366 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 357 predicate places. [2024-06-27 20:25:23,366 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 481 transitions, 5583 flow [2024-06-27 20:25:23,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:23,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:23,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:23,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-27 20:25:23,366 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:25:23,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:23,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1301800261, now seen corresponding path program 10 times [2024-06-27 20:25:23,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:23,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725430448] [2024-06-27 20:25:23,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:23,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:23,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:24,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:24,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:24,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725430448] [2024-06-27 20:25:24,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725430448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:24,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:24,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:25:24,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747089839] [2024-06-27 20:25:24,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:24,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:25:24,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:24,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:25:24,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:25:24,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:25:24,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 481 transitions, 5583 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:24,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:24,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:25:24,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:26,048 INFO L124 PetriNetUnfolderBase]: 4181/6918 cut-off events. [2024-06-27 20:25:26,048 INFO L125 PetriNetUnfolderBase]: For 2682605/2682611 co-relation queries the response was YES. [2024-06-27 20:25:26,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82985 conditions, 6918 events. 4181/6918 cut-off events. For 2682605/2682611 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 45958 event pairs, 953 based on Foata normal form. 3/6840 useless extension candidates. Maximal degree in co-relation 82790. Up to 6074 conditions per place. [2024-06-27 20:25:26,167 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 337 selfloop transitions, 87 changer transitions 0/499 dead transitions. [2024-06-27 20:25:26,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 499 transitions, 7065 flow [2024-06-27 20:25:26,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:25:26,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:25:26,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 20:25:26,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-27 20:25:26,168 INFO L175 Difference]: Start difference. First operand has 402 places, 481 transitions, 5583 flow. Second operand 8 states and 159 transitions. [2024-06-27 20:25:26,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 499 transitions, 7065 flow [2024-06-27 20:25:32,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 499 transitions, 6837 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-27 20:25:32,309 INFO L231 Difference]: Finished difference. Result has 406 places, 487 transitions, 5849 flow [2024-06-27 20:25:32,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5355, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5849, PETRI_PLACES=406, PETRI_TRANSITIONS=487} [2024-06-27 20:25:32,309 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 361 predicate places. [2024-06-27 20:25:32,310 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 487 transitions, 5849 flow [2024-06-27 20:25:32,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:32,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:32,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:32,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-27 20:25:32,310 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:25:32,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:32,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1301800075, now seen corresponding path program 11 times [2024-06-27 20:25:32,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:32,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305501772] [2024-06-27 20:25:32,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:32,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:32,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:33,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:33,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:33,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305501772] [2024-06-27 20:25:33,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305501772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:33,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:33,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:25:33,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059851832] [2024-06-27 20:25:33,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:33,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:25:33,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:33,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:25:33,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:25:33,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:25:33,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 487 transitions, 5849 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:33,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:33,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:25:33,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:35,117 INFO L124 PetriNetUnfolderBase]: 4400/7206 cut-off events. [2024-06-27 20:25:35,117 INFO L125 PetriNetUnfolderBase]: For 2733511/2733520 co-relation queries the response was YES. [2024-06-27 20:25:35,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85401 conditions, 7206 events. 4400/7206 cut-off events. For 2733511/2733520 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 47089 event pairs, 1000 based on Foata normal form. 5/7204 useless extension candidates. Maximal degree in co-relation 85205. Up to 6547 conditions per place. [2024-06-27 20:25:35,241 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 380 selfloop transitions, 88 changer transitions 0/502 dead transitions. [2024-06-27 20:25:35,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 502 transitions, 7229 flow [2024-06-27 20:25:35,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:25:35,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:25:35,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:25:35,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-27 20:25:35,242 INFO L175 Difference]: Start difference. First operand has 406 places, 487 transitions, 5849 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:25:35,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 502 transitions, 7229 flow [2024-06-27 20:25:40,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 502 transitions, 6919 flow, removed 93 selfloop flow, removed 5 redundant places. [2024-06-27 20:25:40,763 INFO L231 Difference]: Finished difference. Result has 409 places, 490 transitions, 5837 flow [2024-06-27 20:25:40,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5539, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5837, PETRI_PLACES=409, PETRI_TRANSITIONS=490} [2024-06-27 20:25:40,764 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 364 predicate places. [2024-06-27 20:25:40,764 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 490 transitions, 5837 flow [2024-06-27 20:25:40,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:40,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:40,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:40,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-27 20:25:40,765 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:25:40,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:40,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1478931781, now seen corresponding path program 11 times [2024-06-27 20:25:40,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:40,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95178794] [2024-06-27 20:25:40,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:40,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:40,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:41,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:41,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:41,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95178794] [2024-06-27 20:25:41,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95178794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:41,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:41,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:25:41,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84830458] [2024-06-27 20:25:41,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:41,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:25:41,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:41,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:25:41,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:25:41,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:25:41,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 490 transitions, 5837 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:41,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:41,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:25:41,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:43,564 INFO L124 PetriNetUnfolderBase]: 4191/6932 cut-off events. [2024-06-27 20:25:43,565 INFO L125 PetriNetUnfolderBase]: For 2742794/2742800 co-relation queries the response was YES. [2024-06-27 20:25:43,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82982 conditions, 6932 events. 4191/6932 cut-off events. For 2742794/2742800 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 46049 event pairs, 950 based on Foata normal form. 3/6854 useless extension candidates. Maximal degree in co-relation 82785. Up to 6085 conditions per place. [2024-06-27 20:25:43,689 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 341 selfloop transitions, 88 changer transitions 0/505 dead transitions. [2024-06-27 20:25:43,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 505 transitions, 7165 flow [2024-06-27 20:25:43,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:25:43,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:25:43,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 20:25:43,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 20:25:43,690 INFO L175 Difference]: Start difference. First operand has 409 places, 490 transitions, 5837 flow. Second operand 8 states and 160 transitions. [2024-06-27 20:25:43,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 505 transitions, 7165 flow [2024-06-27 20:25:49,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 505 transitions, 6907 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-27 20:25:49,716 INFO L231 Difference]: Finished difference. Result has 412 places, 493 transitions, 5901 flow [2024-06-27 20:25:49,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5579, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5901, PETRI_PLACES=412, PETRI_TRANSITIONS=493} [2024-06-27 20:25:49,717 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 367 predicate places. [2024-06-27 20:25:49,717 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 493 transitions, 5901 flow [2024-06-27 20:25:49,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:49,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:49,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:49,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-27 20:25:49,718 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:25:49,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:49,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1478931347, now seen corresponding path program 10 times [2024-06-27 20:25:49,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:49,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541411828] [2024-06-27 20:25:49,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:49,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:49,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:50,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:50,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:50,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541411828] [2024-06-27 20:25:50,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541411828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:50,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:50,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:25:50,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917820236] [2024-06-27 20:25:50,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:50,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:25:50,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:50,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:25:50,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:25:50,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:25:50,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 493 transitions, 5901 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:50,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:50,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:25:50,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:52,435 INFO L124 PetriNetUnfolderBase]: 4273/7010 cut-off events. [2024-06-27 20:25:52,435 INFO L125 PetriNetUnfolderBase]: For 2759648/2759657 co-relation queries the response was YES. [2024-06-27 20:25:52,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83339 conditions, 7010 events. 4273/7010 cut-off events. For 2759648/2759657 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 46095 event pairs, 966 based on Foata normal form. 7/6938 useless extension candidates. Maximal degree in co-relation 83141. Up to 6341 conditions per place. [2024-06-27 20:25:52,561 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 370 selfloop transitions, 89 changer transitions 0/506 dead transitions. [2024-06-27 20:25:52,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 506 transitions, 7457 flow [2024-06-27 20:25:52,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:25:52,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:25:52,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:25:52,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-27 20:25:52,562 INFO L175 Difference]: Start difference. First operand has 412 places, 493 transitions, 5901 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:25:52,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 506 transitions, 7457 flow [2024-06-27 20:25:59,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 506 transitions, 7017 flow, removed 100 selfloop flow, removed 7 redundant places. [2024-06-27 20:25:59,129 INFO L231 Difference]: Finished difference. Result has 413 places, 493 transitions, 5645 flow [2024-06-27 20:25:59,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5461, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5645, PETRI_PLACES=413, PETRI_TRANSITIONS=493} [2024-06-27 20:25:59,130 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 368 predicate places. [2024-06-27 20:25:59,130 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 493 transitions, 5645 flow [2024-06-27 20:25:59,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:59,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:59,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:59,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-27 20:25:59,131 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:25:59,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:59,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1478931595, now seen corresponding path program 12 times [2024-06-27 20:25:59,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:59,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255005041] [2024-06-27 20:25:59,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:59,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:59,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:59,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:59,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:59,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255005041] [2024-06-27 20:25:59,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255005041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:59,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:59,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:25:59,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733655194] [2024-06-27 20:25:59,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:59,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:25:59,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:59,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:25:59,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:26:00,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:26:00,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 493 transitions, 5645 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:00,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:00,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:26:00,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:01,786 INFO L124 PetriNetUnfolderBase]: 4398/7192 cut-off events. [2024-06-27 20:26:01,786 INFO L125 PetriNetUnfolderBase]: For 2792991/2793000 co-relation queries the response was YES. [2024-06-27 20:26:01,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84235 conditions, 7192 events. 4398/7192 cut-off events. For 2792991/2793000 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 46927 event pairs, 997 based on Foata normal form. 5/7190 useless extension candidates. Maximal degree in co-relation 84037. Up to 6547 conditions per place. [2024-06-27 20:26:01,921 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 380 selfloop transitions, 90 changer transitions 0/504 dead transitions. [2024-06-27 20:26:01,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 504 transitions, 6611 flow [2024-06-27 20:26:01,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:26:01,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:26:01,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:26:01,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-27 20:26:01,922 INFO L175 Difference]: Start difference. First operand has 413 places, 493 transitions, 5645 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:26:01,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 504 transitions, 6611 flow [2024-06-27 20:26:07,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 504 transitions, 6281 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-27 20:26:08,003 INFO L231 Difference]: Finished difference. Result has 414 places, 493 transitions, 5501 flow [2024-06-27 20:26:08,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5315, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5501, PETRI_PLACES=414, PETRI_TRANSITIONS=493} [2024-06-27 20:26:08,004 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 369 predicate places. [2024-06-27 20:26:08,004 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 493 transitions, 5501 flow [2024-06-27 20:26:08,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:08,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:08,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:08,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-27 20:26:08,005 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:08,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:08,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1478634677, now seen corresponding path program 11 times [2024-06-27 20:26:08,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:08,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644709270] [2024-06-27 20:26:08,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:08,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:08,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:08,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:08,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:08,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644709270] [2024-06-27 20:26:08,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644709270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:08,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:08,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:26:08,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080224837] [2024-06-27 20:26:08,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:08,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:26:08,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:08,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:26:08,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:26:09,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:26:09,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 493 transitions, 5501 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:09,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:09,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:26:09,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:10,726 INFO L124 PetriNetUnfolderBase]: 4267/6998 cut-off events. [2024-06-27 20:26:10,727 INFO L125 PetriNetUnfolderBase]: For 2802144/2802153 co-relation queries the response was YES. [2024-06-27 20:26:10,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82856 conditions, 6998 events. 4267/6998 cut-off events. For 2802144/2802153 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 45954 event pairs, 966 based on Foata normal form. 7/6926 useless extension candidates. Maximal degree in co-relation 82658. Up to 6335 conditions per place. [2024-06-27 20:26:10,857 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 368 selfloop transitions, 90 changer transitions 0/505 dead transitions. [2024-06-27 20:26:10,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 505 transitions, 6753 flow [2024-06-27 20:26:10,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:26:10,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:26:10,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 20:26:10,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-27 20:26:10,859 INFO L175 Difference]: Start difference. First operand has 414 places, 493 transitions, 5501 flow. Second operand 8 states and 152 transitions. [2024-06-27 20:26:10,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 505 transitions, 6753 flow [2024-06-27 20:26:17,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 505 transitions, 6425 flow, removed 39 selfloop flow, removed 9 redundant places. [2024-06-27 20:26:17,633 INFO L231 Difference]: Finished difference. Result has 413 places, 493 transitions, 5359 flow [2024-06-27 20:26:17,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5173, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5359, PETRI_PLACES=413, PETRI_TRANSITIONS=493} [2024-06-27 20:26:17,634 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 368 predicate places. [2024-06-27 20:26:17,634 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 493 transitions, 5359 flow [2024-06-27 20:26:17,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:17,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:17,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:17,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-27 20:26:17,635 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:17,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:17,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1016224727, now seen corresponding path program 12 times [2024-06-27 20:26:17,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:17,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514985043] [2024-06-27 20:26:17,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:17,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:17,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:18,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:18,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:18,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514985043] [2024-06-27 20:26:18,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514985043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:18,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:18,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:26:18,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868407098] [2024-06-27 20:26:18,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:18,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:26:18,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:18,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:26:18,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:26:18,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:26:18,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 493 transitions, 5359 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:18,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:18,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:26:18,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:20,278 INFO L124 PetriNetUnfolderBase]: 4264/6996 cut-off events. [2024-06-27 20:26:20,287 INFO L125 PetriNetUnfolderBase]: For 2824652/2824661 co-relation queries the response was YES. [2024-06-27 20:26:20,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82685 conditions, 6996 events. 4264/6996 cut-off events. For 2824652/2824661 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 45901 event pairs, 963 based on Foata normal form. 7/6924 useless extension candidates. Maximal degree in co-relation 82487. Up to 6332 conditions per place. [2024-06-27 20:26:20,418 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 363 selfloop transitions, 94 changer transitions 0/504 dead transitions. [2024-06-27 20:26:20,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 504 transitions, 6299 flow [2024-06-27 20:26:20,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:26:20,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:26:20,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:26:20,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-27 20:26:20,427 INFO L175 Difference]: Start difference. First operand has 413 places, 493 transitions, 5359 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:26:20,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 504 transitions, 6299 flow [2024-06-27 20:26:28,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 504 transitions, 6007 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-27 20:26:28,021 INFO L231 Difference]: Finished difference. Result has 414 places, 493 transitions, 5261 flow [2024-06-27 20:26:28,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5067, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5261, PETRI_PLACES=414, PETRI_TRANSITIONS=493} [2024-06-27 20:26:28,022 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 369 predicate places. [2024-06-27 20:26:28,022 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 493 transitions, 5261 flow [2024-06-27 20:26:28,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:28,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:28,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:28,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-27 20:26:28,022 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:28,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:28,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1479051751, now seen corresponding path program 12 times [2024-06-27 20:26:28,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:28,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479010416] [2024-06-27 20:26:28,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:28,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:28,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:29,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:29,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:29,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479010416] [2024-06-27 20:26:29,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479010416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:29,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:29,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:26:29,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357550411] [2024-06-27 20:26:29,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:29,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:26:29,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:29,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:26:29,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:26:29,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:26:29,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 493 transitions, 5261 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:29,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:29,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:26:29,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:30,940 INFO L124 PetriNetUnfolderBase]: 4176/6912 cut-off events. [2024-06-27 20:26:30,940 INFO L125 PetriNetUnfolderBase]: For 2852523/2852526 co-relation queries the response was YES. [2024-06-27 20:26:31,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82208 conditions, 6912 events. 4176/6912 cut-off events. For 2852523/2852526 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 45949 event pairs, 929 based on Foata normal form. 1/6834 useless extension candidates. Maximal degree in co-relation 82009. Up to 6181 conditions per place. [2024-06-27 20:26:31,066 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 399 selfloop transitions, 29 changer transitions 0/504 dead transitions. [2024-06-27 20:26:31,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 504 transitions, 6143 flow [2024-06-27 20:26:31,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:26:31,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:26:31,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 20:26:31,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 20:26:31,068 INFO L175 Difference]: Start difference. First operand has 414 places, 493 transitions, 5261 flow. Second operand 8 states and 154 transitions. [2024-06-27 20:26:31,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 504 transitions, 6143 flow [2024-06-27 20:26:37,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 504 transitions, 5855 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-27 20:26:37,547 INFO L231 Difference]: Finished difference. Result has 415 places, 493 transitions, 5037 flow [2024-06-27 20:26:37,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4973, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5037, PETRI_PLACES=415, PETRI_TRANSITIONS=493} [2024-06-27 20:26:37,548 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 370 predicate places. [2024-06-27 20:26:37,548 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 493 transitions, 5037 flow [2024-06-27 20:26:37,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:37,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:37,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:37,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-27 20:26:37,548 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:37,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:37,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1897053656, now seen corresponding path program 2 times [2024-06-27 20:26:37,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:37,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997514753] [2024-06-27 20:26:37,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:37,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:37,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:38,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:38,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:38,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997514753] [2024-06-27 20:26:38,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997514753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:38,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:38,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:26:38,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869586854] [2024-06-27 20:26:38,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:38,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:26:38,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:38,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:26:38,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:26:38,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:26:38,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 493 transitions, 5037 flow. Second operand has 12 states, 12 states have (on average 12.25) internal successors, (147), 12 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:38,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:38,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:26:38,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:40,930 INFO L124 PetriNetUnfolderBase]: 4553/7489 cut-off events. [2024-06-27 20:26:40,931 INFO L125 PetriNetUnfolderBase]: For 2981929/2981932 co-relation queries the response was YES. [2024-06-27 20:26:41,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85812 conditions, 7489 events. 4553/7489 cut-off events. For 2981929/2981932 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 49665 event pairs, 984 based on Foata normal form. 12/7494 useless extension candidates. Maximal degree in co-relation 85612. Up to 6136 conditions per place. [2024-06-27 20:26:41,068 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 401 selfloop transitions, 112 changer transitions 0/547 dead transitions. [2024-06-27 20:26:41,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 547 transitions, 6473 flow [2024-06-27 20:26:41,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:26:41,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:26:41,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 228 transitions. [2024-06-27 20:26:41,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47107438016528924 [2024-06-27 20:26:41,069 INFO L175 Difference]: Start difference. First operand has 415 places, 493 transitions, 5037 flow. Second operand 11 states and 228 transitions. [2024-06-27 20:26:41,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 547 transitions, 6473 flow [2024-06-27 20:26:48,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 547 transitions, 6339 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-27 20:26:48,442 INFO L231 Difference]: Finished difference. Result has 419 places, 504 transitions, 5373 flow [2024-06-27 20:26:48,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4903, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5373, PETRI_PLACES=419, PETRI_TRANSITIONS=504} [2024-06-27 20:26:48,443 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 374 predicate places. [2024-06-27 20:26:48,443 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 504 transitions, 5373 flow [2024-06-27 20:26:48,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.25) internal successors, (147), 12 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:48,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:48,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:48,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-27 20:26:48,444 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:48,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:48,444 INFO L85 PathProgramCache]: Analyzing trace with hash 956918330, now seen corresponding path program 3 times [2024-06-27 20:26:48,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:48,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96465165] [2024-06-27 20:26:48,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:48,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:48,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:49,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:49,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:49,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96465165] [2024-06-27 20:26:49,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96465165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:49,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:49,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:26:49,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661414374] [2024-06-27 20:26:49,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:49,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:26:49,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:49,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:26:49,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:26:49,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:26:49,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 504 transitions, 5373 flow. Second operand has 12 states, 12 states have (on average 12.25) internal successors, (147), 12 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:49,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:49,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:26:49,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:52,348 INFO L124 PetriNetUnfolderBase]: 4676/7730 cut-off events. [2024-06-27 20:26:52,348 INFO L125 PetriNetUnfolderBase]: For 3036020/3036023 co-relation queries the response was YES. [2024-06-27 20:26:52,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88527 conditions, 7730 events. 4676/7730 cut-off events. For 3036020/3036023 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 51889 event pairs, 1026 based on Foata normal form. 12/7735 useless extension candidates. Maximal degree in co-relation 88325. Up to 6441 conditions per place. [2024-06-27 20:26:52,477 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 404 selfloop transitions, 117 changer transitions 0/555 dead transitions. [2024-06-27 20:26:52,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 555 transitions, 6801 flow [2024-06-27 20:26:52,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:26:52,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:26:52,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 227 transitions. [2024-06-27 20:26:52,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4690082644628099 [2024-06-27 20:26:52,479 INFO L175 Difference]: Start difference. First operand has 419 places, 504 transitions, 5373 flow. Second operand 11 states and 227 transitions. [2024-06-27 20:26:52,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 555 transitions, 6801 flow [2024-06-27 20:26:59,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 555 transitions, 6536 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-27 20:26:59,138 INFO L231 Difference]: Finished difference. Result has 426 places, 512 transitions, 5554 flow [2024-06-27 20:26:59,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5116, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5554, PETRI_PLACES=426, PETRI_TRANSITIONS=512} [2024-06-27 20:26:59,139 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 381 predicate places. [2024-06-27 20:26:59,139 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 512 transitions, 5554 flow [2024-06-27 20:26:59,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.25) internal successors, (147), 12 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:59,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:59,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:59,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-27 20:26:59,139 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:59,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:59,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1654194728, now seen corresponding path program 4 times [2024-06-27 20:26:59,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:59,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964327080] [2024-06-27 20:26:59,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:59,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:59,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:00,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:00,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:00,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964327080] [2024-06-27 20:27:00,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964327080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:00,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:00,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:27:00,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016630119] [2024-06-27 20:27:00,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:00,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:27:00,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:00,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:27:00,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:27:00,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:27:00,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 512 transitions, 5554 flow. Second operand has 12 states, 12 states have (on average 12.25) internal successors, (147), 12 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:00,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:00,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:27:00,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:02,945 INFO L124 PetriNetUnfolderBase]: 4786/7940 cut-off events. [2024-06-27 20:27:02,945 INFO L125 PetriNetUnfolderBase]: For 3082129/3082132 co-relation queries the response was YES. [2024-06-27 20:27:03,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90512 conditions, 7940 events. 4786/7940 cut-off events. For 3082129/3082132 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 53913 event pairs, 1056 based on Foata normal form. 12/7945 useless extension candidates. Maximal degree in co-relation 90307. Up to 6714 conditions per place. [2024-06-27 20:27:03,087 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 400 selfloop transitions, 126 changer transitions 0/560 dead transitions. [2024-06-27 20:27:03,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 560 transitions, 6956 flow [2024-06-27 20:27:03,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:27:03,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:27:03,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 226 transitions. [2024-06-27 20:27:03,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4669421487603306 [2024-06-27 20:27:03,089 INFO L175 Difference]: Start difference. First operand has 426 places, 512 transitions, 5554 flow. Second operand 11 states and 226 transitions. [2024-06-27 20:27:03,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 560 transitions, 6956 flow [2024-06-27 20:27:11,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 560 transitions, 6670 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 20:27:11,912 INFO L231 Difference]: Finished difference. Result has 433 places, 518 transitions, 5700 flow [2024-06-27 20:27:11,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5274, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5700, PETRI_PLACES=433, PETRI_TRANSITIONS=518} [2024-06-27 20:27:11,912 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 388 predicate places. [2024-06-27 20:27:11,912 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 518 transitions, 5700 flow [2024-06-27 20:27:11,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.25) internal successors, (147), 12 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:11,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:11,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:11,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-27 20:27:11,913 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:11,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:11,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1406033350, now seen corresponding path program 5 times [2024-06-27 20:27:11,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:11,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824721756] [2024-06-27 20:27:11,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:11,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:11,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:13,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:13,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:13,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824721756] [2024-06-27 20:27:13,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824721756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:13,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:13,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:27:13,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219367374] [2024-06-27 20:27:13,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:13,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:27:13,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:13,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:27:13,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:27:13,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:27:13,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 518 transitions, 5700 flow. Second operand has 12 states, 12 states have (on average 12.25) internal successors, (147), 12 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:13,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:13,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:27:13,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:16,006 INFO L124 PetriNetUnfolderBase]: 4868/8092 cut-off events. [2024-06-27 20:27:16,006 INFO L125 PetriNetUnfolderBase]: For 3126377/3126380 co-relation queries the response was YES. [2024-06-27 20:27:16,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92072 conditions, 8092 events. 4868/8092 cut-off events. For 3126377/3126380 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 55238 event pairs, 1081 based on Foata normal form. 12/8097 useless extension candidates. Maximal degree in co-relation 91864. Up to 6856 conditions per place. [2024-06-27 20:27:16,136 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 396 selfloop transitions, 134 changer transitions 0/564 dead transitions. [2024-06-27 20:27:16,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 564 transitions, 7096 flow [2024-06-27 20:27:16,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:27:16,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:27:16,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 225 transitions. [2024-06-27 20:27:16,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46487603305785125 [2024-06-27 20:27:16,138 INFO L175 Difference]: Start difference. First operand has 433 places, 518 transitions, 5700 flow. Second operand 11 states and 225 transitions. [2024-06-27 20:27:16,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 564 transitions, 7096 flow [2024-06-27 20:27:24,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 564 transitions, 6787 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-27 20:27:24,915 INFO L231 Difference]: Finished difference. Result has 439 places, 522 transitions, 5813 flow [2024-06-27 20:27:24,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5393, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5813, PETRI_PLACES=439, PETRI_TRANSITIONS=522} [2024-06-27 20:27:24,916 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 394 predicate places. [2024-06-27 20:27:24,916 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 522 transitions, 5813 flow [2024-06-27 20:27:24,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.25) internal successors, (147), 12 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:24,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:24,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:24,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-27 20:27:24,917 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:24,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:24,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1812652992, now seen corresponding path program 6 times [2024-06-27 20:27:24,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:24,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222314815] [2024-06-27 20:27:24,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:24,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:24,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:26,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:26,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:26,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222314815] [2024-06-27 20:27:26,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222314815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:26,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:26,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:27:26,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300765684] [2024-06-27 20:27:26,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:26,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:27:26,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:26,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:27:26,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:27:26,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:27:26,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 522 transitions, 5813 flow. Second operand has 12 states, 12 states have (on average 12.25) internal successors, (147), 12 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:26,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:26,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:27:26,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:29,111 INFO L124 PetriNetUnfolderBase]: 4852/8064 cut-off events. [2024-06-27 20:27:29,112 INFO L125 PetriNetUnfolderBase]: For 3097058/3097077 co-relation queries the response was YES. [2024-06-27 20:27:29,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90455 conditions, 8064 events. 4852/8064 cut-off events. For 3097058/3097077 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 54944 event pairs, 1003 based on Foata normal form. 12/8067 useless extension candidates. Maximal degree in co-relation 90245. Up to 5456 conditions per place. [2024-06-27 20:27:29,374 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 375 selfloop transitions, 155 changer transitions 0/564 dead transitions. [2024-06-27 20:27:29,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 564 transitions, 6911 flow [2024-06-27 20:27:29,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:27:29,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:27:29,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 224 transitions. [2024-06-27 20:27:29,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4628099173553719 [2024-06-27 20:27:29,376 INFO L175 Difference]: Start difference. First operand has 439 places, 522 transitions, 5813 flow. Second operand 11 states and 224 transitions. [2024-06-27 20:27:29,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 564 transitions, 6911 flow [2024-06-27 20:27:38,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 564 transitions, 6623 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-27 20:27:38,028 INFO L231 Difference]: Finished difference. Result has 443 places, 521 transitions, 5677 flow [2024-06-27 20:27:38,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5363, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5677, PETRI_PLACES=443, PETRI_TRANSITIONS=521} [2024-06-27 20:27:38,028 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 398 predicate places. [2024-06-27 20:27:38,028 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 521 transitions, 5677 flow [2024-06-27 20:27:38,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.25) internal successors, (147), 12 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:38,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:38,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:38,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-27 20:27:38,029 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:38,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:38,029 INFO L85 PathProgramCache]: Analyzing trace with hash -322361669, now seen corresponding path program 4 times [2024-06-27 20:27:38,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:38,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116537559] [2024-06-27 20:27:38,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:38,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:38,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:39,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:39,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:39,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116537559] [2024-06-27 20:27:39,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116537559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:39,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:39,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:27:39,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703215955] [2024-06-27 20:27:39,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:39,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:27:39,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:39,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:27:39,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:27:39,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:27:39,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 521 transitions, 5677 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:39,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:39,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:27:39,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:41,699 INFO L124 PetriNetUnfolderBase]: 4630/7780 cut-off events. [2024-06-27 20:27:41,699 INFO L125 PetriNetUnfolderBase]: For 2989046/2989049 co-relation queries the response was YES. [2024-06-27 20:27:41,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88196 conditions, 7780 events. 4630/7780 cut-off events. For 2989046/2989049 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 53890 event pairs, 1031 based on Foata normal form. 2/7703 useless extension candidates. Maximal degree in co-relation 87985. Up to 6963 conditions per place. [2024-06-27 20:27:41,831 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 431 selfloop transitions, 28 changer transitions 0/535 dead transitions. [2024-06-27 20:27:41,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 535 transitions, 6717 flow [2024-06-27 20:27:41,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:27:41,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:27:41,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:27:41,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-27 20:27:41,832 INFO L175 Difference]: Start difference. First operand has 443 places, 521 transitions, 5677 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:27:41,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 535 transitions, 6717 flow [2024-06-27 20:27:50,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 535 transitions, 6113 flow, removed 39 selfloop flow, removed 12 redundant places. [2024-06-27 20:27:50,118 INFO L231 Difference]: Finished difference. Result has 439 places, 523 transitions, 5232 flow [2024-06-27 20:27:50,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5073, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5232, PETRI_PLACES=439, PETRI_TRANSITIONS=523} [2024-06-27 20:27:50,118 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 394 predicate places. [2024-06-27 20:27:50,118 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 523 transitions, 5232 flow [2024-06-27 20:27:50,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:50,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:50,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:50,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-27 20:27:50,119 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:50,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:50,119 INFO L85 PathProgramCache]: Analyzing trace with hash -321930707, now seen corresponding path program 2 times [2024-06-27 20:27:50,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:50,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576030553] [2024-06-27 20:27:50,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:50,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:50,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:51,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:51,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:51,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576030553] [2024-06-27 20:27:51,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576030553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:51,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:51,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:27:51,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108989311] [2024-06-27 20:27:51,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:51,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:27:51,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:51,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:27:51,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:27:51,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:27:51,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 523 transitions, 5232 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:51,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:51,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:27:51,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:53,674 INFO L124 PetriNetUnfolderBase]: 4482/7566 cut-off events. [2024-06-27 20:27:53,675 INFO L125 PetriNetUnfolderBase]: For 3021028/3021050 co-relation queries the response was YES. [2024-06-27 20:27:53,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84475 conditions, 7566 events. 4482/7566 cut-off events. For 3021028/3021050 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 52950 event pairs, 1027 based on Foata normal form. 2/7444 useless extension candidates. Maximal degree in co-relation 84266. Up to 6661 conditions per place. [2024-06-27 20:27:53,802 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 381 selfloop transitions, 57 changer transitions 0/542 dead transitions. [2024-06-27 20:27:53,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 542 transitions, 6644 flow [2024-06-27 20:27:53,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:27:53,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:27:53,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-27 20:27:53,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-27 20:27:53,804 INFO L175 Difference]: Start difference. First operand has 439 places, 523 transitions, 5232 flow. Second operand 9 states and 174 transitions. [2024-06-27 20:27:53,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 542 transitions, 6644 flow [2024-06-27 20:28:01,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 542 transitions, 6461 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-27 20:28:01,408 INFO L231 Difference]: Finished difference. Result has 440 places, 529 transitions, 5355 flow [2024-06-27 20:28:01,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5049, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5355, PETRI_PLACES=440, PETRI_TRANSITIONS=529} [2024-06-27 20:28:01,408 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 395 predicate places. [2024-06-27 20:28:01,409 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 529 transitions, 5355 flow [2024-06-27 20:28:01,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:01,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:01,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:01,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-27 20:28:01,409 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:01,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:01,409 INFO L85 PathProgramCache]: Analyzing trace with hash -486529969, now seen corresponding path program 3 times [2024-06-27 20:28:01,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:01,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721893490] [2024-06-27 20:28:01,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:01,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:01,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:02,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:02,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:02,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721893490] [2024-06-27 20:28:02,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721893490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:02,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:02,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:28:02,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216104929] [2024-06-27 20:28:02,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:02,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:28:02,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:02,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:28:02,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:28:02,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:28:02,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 529 transitions, 5355 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:02,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:02,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:28:02,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:04,977 INFO L124 PetriNetUnfolderBase]: 4496/7591 cut-off events. [2024-06-27 20:28:04,978 INFO L125 PetriNetUnfolderBase]: For 3071127/3071149 co-relation queries the response was YES. [2024-06-27 20:28:05,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85195 conditions, 7591 events. 4496/7591 cut-off events. For 3071127/3071149 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 53155 event pairs, 1027 based on Foata normal form. 5/7473 useless extension candidates. Maximal degree in co-relation 84987. Up to 6678 conditions per place. [2024-06-27 20:28:05,108 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 375 selfloop transitions, 70 changer transitions 0/549 dead transitions. [2024-06-27 20:28:05,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 549 transitions, 7125 flow [2024-06-27 20:28:05,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:28:05,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:28:05,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 20:28:05,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2024-06-27 20:28:05,109 INFO L175 Difference]: Start difference. First operand has 440 places, 529 transitions, 5355 flow. Second operand 9 states and 173 transitions. [2024-06-27 20:28:05,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 549 transitions, 7125 flow [2024-06-27 20:28:10,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 549 transitions, 6970 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-27 20:28:10,827 INFO L231 Difference]: Finished difference. Result has 444 places, 535 transitions, 5538 flow [2024-06-27 20:28:10,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5216, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5538, PETRI_PLACES=444, PETRI_TRANSITIONS=535} [2024-06-27 20:28:10,827 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 399 predicate places. [2024-06-27 20:28:10,827 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 535 transitions, 5538 flow [2024-06-27 20:28:10,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:10,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:10,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:10,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-27 20:28:10,828 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:10,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:10,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1005738295, now seen corresponding path program 4 times [2024-06-27 20:28:10,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:10,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077996212] [2024-06-27 20:28:10,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:10,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:10,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:12,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:12,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:12,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077996212] [2024-06-27 20:28:12,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077996212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:12,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:12,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:28:12,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115028914] [2024-06-27 20:28:12,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:12,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:28:12,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:12,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:28:12,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:28:12,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:28:12,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 535 transitions, 5538 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:12,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:12,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:28:12,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:14,538 INFO L124 PetriNetUnfolderBase]: 4491/7594 cut-off events. [2024-06-27 20:28:14,538 INFO L125 PetriNetUnfolderBase]: For 3079008/3079016 co-relation queries the response was YES. [2024-06-27 20:28:14,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85059 conditions, 7594 events. 4491/7594 cut-off events. For 3079008/3079016 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 53111 event pairs, 1019 based on Foata normal form. 4/7481 useless extension candidates. Maximal degree in co-relation 84849. Up to 6758 conditions per place. [2024-06-27 20:28:14,675 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 423 selfloop transitions, 20 changer transitions 0/547 dead transitions. [2024-06-27 20:28:14,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 547 transitions, 6452 flow [2024-06-27 20:28:14,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:28:14,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:28:14,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 20:28:14,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 20:28:14,676 INFO L175 Difference]: Start difference. First operand has 444 places, 535 transitions, 5538 flow. Second operand 9 states and 165 transitions. [2024-06-27 20:28:14,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 547 transitions, 6452 flow [2024-06-27 20:28:21,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 547 transitions, 6197 flow, removed 77 selfloop flow, removed 5 redundant places. [2024-06-27 20:28:21,286 INFO L231 Difference]: Finished difference. Result has 448 places, 535 transitions, 5329 flow [2024-06-27 20:28:21,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5283, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5329, PETRI_PLACES=448, PETRI_TRANSITIONS=535} [2024-06-27 20:28:21,287 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 403 predicate places. [2024-06-27 20:28:21,287 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 535 transitions, 5329 flow [2024-06-27 20:28:21,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:21,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:21,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:21,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-27 20:28:21,288 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:21,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:21,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1021927735, now seen corresponding path program 5 times [2024-06-27 20:28:21,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:21,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42428253] [2024-06-27 20:28:21,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:21,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:21,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:22,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:22,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:22,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42428253] [2024-06-27 20:28:22,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42428253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:22,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:22,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:28:22,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727909631] [2024-06-27 20:28:22,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:22,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:28:22,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:22,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:28:22,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:28:22,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:28:22,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 535 transitions, 5329 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:22,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:22,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:28:22,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:24,572 INFO L124 PetriNetUnfolderBase]: 4484/7575 cut-off events. [2024-06-27 20:28:24,572 INFO L125 PetriNetUnfolderBase]: For 3086687/3086691 co-relation queries the response was YES. [2024-06-27 20:28:24,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84535 conditions, 7575 events. 4484/7575 cut-off events. For 3086687/3086691 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 53089 event pairs, 1026 based on Foata normal form. 2/7454 useless extension candidates. Maximal degree in co-relation 84324. Up to 6668 conditions per place. [2024-06-27 20:28:24,704 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 377 selfloop transitions, 66 changer transitions 0/547 dead transitions. [2024-06-27 20:28:24,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 547 transitions, 6243 flow [2024-06-27 20:28:24,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:28:24,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:28:24,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 20:28:24,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43434343434343436 [2024-06-27 20:28:24,706 INFO L175 Difference]: Start difference. First operand has 448 places, 535 transitions, 5329 flow. Second operand 9 states and 172 transitions. [2024-06-27 20:28:24,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 547 transitions, 6243 flow [2024-06-27 20:28:31,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 547 transitions, 6129 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-27 20:28:31,765 INFO L231 Difference]: Finished difference. Result has 449 places, 535 transitions, 5353 flow [2024-06-27 20:28:31,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5215, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5353, PETRI_PLACES=449, PETRI_TRANSITIONS=535} [2024-06-27 20:28:31,766 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 404 predicate places. [2024-06-27 20:28:31,766 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 535 transitions, 5353 flow [2024-06-27 20:28:31,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:31,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:31,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:31,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-27 20:28:31,767 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:31,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:31,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1403808449, now seen corresponding path program 1 times [2024-06-27 20:28:31,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:31,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378372255] [2024-06-27 20:28:31,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:31,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:32,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:32,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:32,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378372255] [2024-06-27 20:28:32,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378372255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:32,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:32,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:28:32,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092811906] [2024-06-27 20:28:32,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:32,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:28:32,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:32,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:28:32,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:28:32,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 20:28:32,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 535 transitions, 5353 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:32,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:32,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 20:28:32,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:35,419 INFO L124 PetriNetUnfolderBase]: 4717/7939 cut-off events. [2024-06-27 20:28:35,420 INFO L125 PetriNetUnfolderBase]: For 3113199/3113199 co-relation queries the response was YES. [2024-06-27 20:28:35,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86778 conditions, 7939 events. 4717/7939 cut-off events. For 3113199/3113199 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 55184 event pairs, 1034 based on Foata normal form. 1/7933 useless extension candidates. Maximal degree in co-relation 86566. Up to 7203 conditions per place. [2024-06-27 20:28:35,550 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 502 selfloop transitions, 20 changer transitions 0/562 dead transitions. [2024-06-27 20:28:35,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 562 transitions, 6585 flow [2024-06-27 20:28:35,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:28:35,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:28:35,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-27 20:28:35,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-27 20:28:35,551 INFO L175 Difference]: Start difference. First operand has 449 places, 535 transitions, 5353 flow. Second operand 9 states and 177 transitions. [2024-06-27 20:28:35,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 562 transitions, 6585 flow [2024-06-27 20:28:43,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 562 transitions, 6401 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 20:28:43,798 INFO L231 Difference]: Finished difference. Result has 449 places, 538 transitions, 5349 flow [2024-06-27 20:28:43,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5169, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5349, PETRI_PLACES=449, PETRI_TRANSITIONS=538} [2024-06-27 20:28:43,798 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 404 predicate places. [2024-06-27 20:28:43,798 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 538 transitions, 5349 flow [2024-06-27 20:28:43,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:43,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:43,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:43,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-27 20:28:43,799 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:43,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:43,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1403688293, now seen corresponding path program 1 times [2024-06-27 20:28:43,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:43,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560767231] [2024-06-27 20:28:43,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:43,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:43,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:44,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:44,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:44,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560767231] [2024-06-27 20:28:44,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560767231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:44,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:44,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:28:44,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653755501] [2024-06-27 20:28:44,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:44,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:28:44,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:44,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:28:44,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:28:44,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:28:44,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 538 transitions, 5349 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:44,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:44,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:28:44,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:47,187 INFO L124 PetriNetUnfolderBase]: 4812/8036 cut-off events. [2024-06-27 20:28:47,187 INFO L125 PetriNetUnfolderBase]: For 3161180/3161180 co-relation queries the response was YES. [2024-06-27 20:28:47,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88077 conditions, 8036 events. 4812/8036 cut-off events. For 3161180/3161180 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 55330 event pairs, 1065 based on Foata normal form. 2/8031 useless extension candidates. Maximal degree in co-relation 87864. Up to 7443 conditions per place. [2024-06-27 20:28:47,322 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 533 selfloop transitions, 20 changer transitions 0/564 dead transitions. [2024-06-27 20:28:47,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 564 transitions, 6623 flow [2024-06-27 20:28:47,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:28:47,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:28:47,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 20:28:47,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-27 20:28:47,324 INFO L175 Difference]: Start difference. First operand has 449 places, 538 transitions, 5349 flow. Second operand 9 states and 168 transitions. [2024-06-27 20:28:47,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 564 transitions, 6623 flow [2024-06-27 20:28:55,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 564 transitions, 6465 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-27 20:28:55,510 INFO L231 Difference]: Finished difference. Result has 451 places, 541 transitions, 5335 flow [2024-06-27 20:28:55,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5191, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5335, PETRI_PLACES=451, PETRI_TRANSITIONS=541} [2024-06-27 20:28:55,511 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 406 predicate places. [2024-06-27 20:28:55,511 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 541 transitions, 5335 flow [2024-06-27 20:28:55,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:55,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:55,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:55,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-27 20:28:55,511 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:55,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:55,512 INFO L85 PathProgramCache]: Analyzing trace with hash -805291215, now seen corresponding path program 1 times [2024-06-27 20:28:55,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:55,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136621758] [2024-06-27 20:28:55,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:55,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:55,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:56,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:56,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:56,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136621758] [2024-06-27 20:28:56,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136621758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:56,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:56,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:28:56,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730493430] [2024-06-27 20:28:56,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:56,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:28:56,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:56,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:28:56,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:28:56,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:28:56,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 541 transitions, 5335 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:56,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:56,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:28:56,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:59,014 INFO L124 PetriNetUnfolderBase]: 4817/8045 cut-off events. [2024-06-27 20:28:59,014 INFO L125 PetriNetUnfolderBase]: For 3201263/3201263 co-relation queries the response was YES. [2024-06-27 20:28:59,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88893 conditions, 8045 events. 4817/8045 cut-off events. For 3201263/3201263 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 55362 event pairs, 1066 based on Foata normal form. 2/8040 useless extension candidates. Maximal degree in co-relation 88679. Up to 7464 conditions per place. [2024-06-27 20:28:59,149 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 531 selfloop transitions, 20 changer transitions 0/562 dead transitions. [2024-06-27 20:28:59,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 562 transitions, 6585 flow [2024-06-27 20:28:59,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:28:59,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:28:59,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 20:28:59,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4116161616161616 [2024-06-27 20:28:59,150 INFO L175 Difference]: Start difference. First operand has 451 places, 541 transitions, 5335 flow. Second operand 9 states and 163 transitions. [2024-06-27 20:28:59,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 562 transitions, 6585 flow [2024-06-27 20:29:06,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 562 transitions, 6463 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-27 20:29:06,822 INFO L231 Difference]: Finished difference. Result has 453 places, 544 transitions, 5369 flow [2024-06-27 20:29:06,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5213, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5369, PETRI_PLACES=453, PETRI_TRANSITIONS=544} [2024-06-27 20:29:06,822 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 408 predicate places. [2024-06-27 20:29:06,822 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 544 transitions, 5369 flow [2024-06-27 20:29:06,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:06,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:06,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:06,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-27 20:29:06,823 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:29:06,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:06,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1399040153, now seen corresponding path program 2 times [2024-06-27 20:29:06,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:06,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309113874] [2024-06-27 20:29:06,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:06,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:06,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:07,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:07,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:07,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309113874] [2024-06-27 20:29:07,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309113874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:07,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:07,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:29:07,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859740608] [2024-06-27 20:29:07,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:07,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:29:07,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:07,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:29:07,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:29:07,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:29:07,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 544 transitions, 5369 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:07,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:07,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:29:07,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:10,280 INFO L124 PetriNetUnfolderBase]: 4843/8083 cut-off events. [2024-06-27 20:29:10,280 INFO L125 PetriNetUnfolderBase]: For 3267209/3267209 co-relation queries the response was YES. [2024-06-27 20:29:10,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90090 conditions, 8083 events. 4843/8083 cut-off events. For 3267209/3267209 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 55645 event pairs, 1064 based on Foata normal form. 2/8078 useless extension candidates. Maximal degree in co-relation 89875. Up to 7457 conditions per place. [2024-06-27 20:29:10,418 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 528 selfloop transitions, 33 changer transitions 0/572 dead transitions. [2024-06-27 20:29:10,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 572 transitions, 7113 flow [2024-06-27 20:29:10,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:29:10,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:29:10,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 20:29:10,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-27 20:29:10,419 INFO L175 Difference]: Start difference. First operand has 453 places, 544 transitions, 5369 flow. Second operand 9 states and 170 transitions. [2024-06-27 20:29:10,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 572 transitions, 7113 flow [2024-06-27 20:29:21,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 572 transitions, 6979 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-27 20:29:21,715 INFO L231 Difference]: Finished difference. Result has 455 places, 550 transitions, 5513 flow [2024-06-27 20:29:21,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5235, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5513, PETRI_PLACES=455, PETRI_TRANSITIONS=550} [2024-06-27 20:29:21,715 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 410 predicate places. [2024-06-27 20:29:21,716 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 550 transitions, 5513 flow [2024-06-27 20:29:21,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:21,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:21,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:21,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-27 20:29:21,716 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:29:21,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:21,716 INFO L85 PathProgramCache]: Analyzing trace with hash -805297973, now seen corresponding path program 3 times [2024-06-27 20:29:21,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:21,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025039249] [2024-06-27 20:29:21,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:21,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:21,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:22,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:22,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:22,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025039249] [2024-06-27 20:29:22,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025039249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:22,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:22,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:29:22,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552505717] [2024-06-27 20:29:22,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:22,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:29:22,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:22,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:29:22,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:29:22,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:29:22,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 550 transitions, 5513 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:22,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:22,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:29:22,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:25,053 INFO L124 PetriNetUnfolderBase]: 4837/8077 cut-off events. [2024-06-27 20:29:25,053 INFO L125 PetriNetUnfolderBase]: For 3281359/3281359 co-relation queries the response was YES. [2024-06-27 20:29:25,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90416 conditions, 8077 events. 4837/8077 cut-off events. For 3281359/3281359 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 55655 event pairs, 1066 based on Foata normal form. 2/8072 useless extension candidates. Maximal degree in co-relation 90200. Up to 7452 conditions per place. [2024-06-27 20:29:25,432 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 528 selfloop transitions, 32 changer transitions 0/571 dead transitions. [2024-06-27 20:29:25,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 571 transitions, 6713 flow [2024-06-27 20:29:25,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:29:25,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:29:25,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 20:29:25,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-27 20:29:25,433 INFO L175 Difference]: Start difference. First operand has 455 places, 550 transitions, 5513 flow. Second operand 9 states and 170 transitions. [2024-06-27 20:29:25,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 571 transitions, 6713 flow [2024-06-27 20:29:34,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 571 transitions, 6513 flow, removed 87 selfloop flow, removed 5 redundant places. [2024-06-27 20:29:34,773 INFO L231 Difference]: Finished difference. Result has 459 places, 550 transitions, 5383 flow [2024-06-27 20:29:34,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5313, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5383, PETRI_PLACES=459, PETRI_TRANSITIONS=550} [2024-06-27 20:29:34,774 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 414 predicate places. [2024-06-27 20:29:34,774 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 550 transitions, 5383 flow [2024-06-27 20:29:34,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:34,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:34,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:34,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-27 20:29:34,779 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:29:34,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:34,780 INFO L85 PathProgramCache]: Analyzing trace with hash -632570685, now seen corresponding path program 2 times [2024-06-27 20:29:34,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:34,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705218362] [2024-06-27 20:29:34,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:34,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:35,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:35,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:35,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705218362] [2024-06-27 20:29:35,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705218362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:35,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:35,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:29:35,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798130895] [2024-06-27 20:29:35,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:35,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:29:35,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:35,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:29:35,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:29:35,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:29:35,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 550 transitions, 5383 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:35,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:35,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:29:35,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand