./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix056_power.oepc_pso.oepc_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix056_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix056_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix056_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 16:32:10,274 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 16:32:10,339 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 16:32:10,343 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 16:32:10,343 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 16:32:10,368 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 16:32:10,368 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 16:32:10,369 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 16:32:10,369 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 16:32:10,372 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 16:32:10,373 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 16:32:10,373 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 16:32:10,374 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 16:32:10,375 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 16:32:10,375 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 16:32:10,375 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 16:32:10,375 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 16:32:10,375 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 16:32:10,376 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 16:32:10,376 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 16:32:10,376 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 16:32:10,376 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 16:32:10,376 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 16:32:10,377 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 16:32:10,377 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 16:32:10,377 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 16:32:10,377 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 16:32:10,377 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 16:32:10,378 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 16:32:10,378 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 16:32:10,379 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 16:32:10,379 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 16:32:10,379 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:32:10,379 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 16:32:10,379 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 16:32:10,380 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 16:32:10,380 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 16:32:10,380 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 16:32:10,380 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 16:32:10,380 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 16:32:10,380 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 16:32:10,381 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 16:32:10,381 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 16:32:10,381 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 16:32:10,573 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 16:32:10,592 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 16:32:10,593 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 16:32:10,594 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 16:32:10,595 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 16:32:10,595 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix056_power.oepc_pso.oepc_rmo.oepc.i [2024-06-20 16:32:11,659 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 16:32:11,890 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 16:32:11,891 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix056_power.oepc_pso.oepc_rmo.oepc.i [2024-06-20 16:32:11,902 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b180faed5/c9794b335bac4b0bb725e90d10060a12/FLAGc1feb4a93 [2024-06-20 16:32:11,914 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b180faed5/c9794b335bac4b0bb725e90d10060a12 [2024-06-20 16:32:11,916 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 16:32:11,917 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 16:32:11,917 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix056_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-20 16:32:12,060 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 16:32:12,061 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 16:32:12,063 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 16:32:12,063 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 16:32:12,066 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 16:32:12,067 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:32:11" (1/2) ... [2024-06-20 16:32:12,067 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6822054a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:32:12, skipping insertion in model container [2024-06-20 16:32:12,068 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:32:11" (1/2) ... [2024-06-20 16:32:12,070 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5633fdc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:32:12, skipping insertion in model container [2024-06-20 16:32:12,070 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:32:12" (2/2) ... [2024-06-20 16:32:12,070 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6822054a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:32:12, skipping insertion in model container [2024-06-20 16:32:12,070 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:32:12" (2/2) ... [2024-06-20 16:32:12,071 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 16:32:12,131 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 16:32:12,133 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] ((((((((((((((((! multithreaded || z$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-20 16:32:12,133 INFO L97 edCorrectnessWitness]: Location invariant before [L834-L834] ((((((((((((((((! multithreaded || z$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-20 16:32:12,133 INFO L97 edCorrectnessWitness]: Location invariant before [L837-L837] ((((((((((((((((! multithreaded || z$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-20 16:32:12,133 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 16:32:12,133 INFO L106 edCorrectnessWitness]: ghost_update [L832-L832] multithreaded = 1; [2024-06-20 16:32:12,171 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 16:32:12,499 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:32:12,509 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 16:32:12,598 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:32:12,636 INFO L206 MainTranslator]: Completed translation [2024-06-20 16:32:12,637 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:32:12 WrapperNode [2024-06-20 16:32:12,637 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 16:32:12,638 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 16:32:12,638 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 16:32:12,638 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 16:32:12,643 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:32:12" (1/1) ... [2024-06-20 16:32:12,669 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:32:12" (1/1) ... [2024-06-20 16:32:12,701 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 124 [2024-06-20 16:32:12,703 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 16:32:12,704 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 16:32:12,704 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 16:32:12,704 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 16:32:12,712 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:32:12" (1/1) ... [2024-06-20 16:32:12,712 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:32:12" (1/1) ... [2024-06-20 16:32:12,728 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:32:12" (1/1) ... [2024-06-20 16:32:12,744 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-20 16:32:12,750 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:32:12" (1/1) ... [2024-06-20 16:32:12,750 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:32:12" (1/1) ... [2024-06-20 16:32:12,759 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:32:12" (1/1) ... [2024-06-20 16:32:12,763 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:32:12" (1/1) ... [2024-06-20 16:32:12,768 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:32:12" (1/1) ... [2024-06-20 16:32:12,769 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:32:12" (1/1) ... [2024-06-20 16:32:12,775 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 16:32:12,776 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 16:32:12,776 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 16:32:12,776 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 16:32:12,777 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:32:12" (1/1) ... [2024-06-20 16:32:12,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:32:12,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 16:32:12,801 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-20 16:32:12,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-20 16:32:12,836 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 16:32:12,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 16:32:12,837 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 16:32:12,837 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 16:32:12,837 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 16:32:12,838 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 16:32:12,838 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 16:32:12,838 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 16:32:12,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 16:32:12,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 16:32:12,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 16:32:12,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 16:32:12,840 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 16:32:12,936 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 16:32:12,938 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 16:32:13,245 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 16:32:13,253 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 16:32:13,425 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 16:32:13,426 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 16:32:13,426 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:32:13 BoogieIcfgContainer [2024-06-20 16:32:13,426 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 16:32:13,428 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 16:32:13,428 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 16:32:13,430 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 16:32:13,430 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 04:32:11" (1/4) ... [2024-06-20 16:32:13,431 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c93d5f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:32:13, skipping insertion in model container [2024-06-20 16:32:13,431 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:32:12" (2/4) ... [2024-06-20 16:32:13,431 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c93d5f4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:32:13, skipping insertion in model container [2024-06-20 16:32:13,432 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:32:12" (3/4) ... [2024-06-20 16:32:13,432 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c93d5f4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:32:13, skipping insertion in model container [2024-06-20 16:32:13,432 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:32:13" (4/4) ... [2024-06-20 16:32:13,433 INFO L112 eAbstractionObserver]: Analyzing ICFG mix056_power.oepc_pso.oepc_rmo.oepc.i [2024-06-20 16:32:13,445 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 16:32:13,446 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 16:32:13,446 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 16:32:13,482 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 16:32:13,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-20 16:32:13,538 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-20 16:32:13,538 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:32:13,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 16:32:13,541 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-20 16:32:13,544 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-20 16:32:13,557 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 16:32:13,563 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;@5b601526, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 16:32:13,563 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 16:32:13,568 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 16:32:13,568 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 16:32:13,568 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:32:13,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:13,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 16:32:13,569 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)] === [2024-06-20 16:32:13,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:13,575 INFO L85 PathProgramCache]: Analyzing trace with hash 367551624, now seen corresponding path program 1 times [2024-06-20 16:32:13,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:13,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45188515] [2024-06-20 16:32:13,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:13,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:13,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:14,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:14,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:14,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45188515] [2024-06-20 16:32:14,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45188515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:14,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:14,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 16:32:14,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694680643] [2024-06-20 16:32:14,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:14,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 16:32:14,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:14,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 16:32:14,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 16:32:14,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:32:14,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:14,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:14,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:32:14,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:14,840 INFO L124 PetriNetUnfolderBase]: 1659/2477 cut-off events. [2024-06-20 16:32:14,840 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-20 16:32:14,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5041 conditions, 2477 events. 1659/2477 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11203 event pairs, 1184 based on Foata normal form. 1/2437 useless extension candidates. Maximal degree in co-relation 5029. Up to 2465 conditions per place. [2024-06-20 16:32:14,856 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 33 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-20 16:32:14,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 171 flow [2024-06-20 16:32:14,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 16:32:14,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 16:32:14,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-06-20 16:32:14,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-20 16:32:14,867 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 70 transitions. [2024-06-20 16:32:14,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 171 flow [2024-06-20 16:32:14,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 16:32:14,872 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-20 16:32:14,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-20 16:32:14,876 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-20 16:32:14,876 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-20 16:32:14,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:14,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:14,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:14,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 16:32:14,877 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)] === [2024-06-20 16:32:14,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:14,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1029908673, now seen corresponding path program 1 times [2024-06-20 16:32:14,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:14,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780875041] [2024-06-20 16:32:14,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:14,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:14,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:15,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:15,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:15,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780875041] [2024-06-20 16:32:15,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780875041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:15,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:15,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 16:32:15,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323115356] [2024-06-20 16:32:15,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:15,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 16:32:15,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:15,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 16:32:15,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-20 16:32:15,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:32:15,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:15,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:15,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:32:15,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:15,730 INFO L124 PetriNetUnfolderBase]: 1653/2468 cut-off events. [2024-06-20 16:32:15,730 INFO L125 PetriNetUnfolderBase]: For 458/458 co-relation queries the response was YES. [2024-06-20 16:32:15,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5657 conditions, 2468 events. 1653/2468 cut-off events. For 458/458 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11175 event pairs, 1038 based on Foata normal form. 3/2470 useless extension candidates. Maximal degree in co-relation 5645. Up to 2441 conditions per place. [2024-06-20 16:32:15,741 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 40 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2024-06-20 16:32:15,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 238 flow [2024-06-20 16:32:15,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 16:32:15,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 16:32:15,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2024-06-20 16:32:15,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-20 16:32:15,745 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 90 transitions. [2024-06-20 16:32:15,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 238 flow [2024-06-20 16:32:15,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 51 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:32:15,748 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 134 flow [2024-06-20 16:32:15,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-20 16:32:15,748 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2024-06-20 16:32:15,749 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 134 flow [2024-06-20 16:32:15,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:15,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:15,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:15,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 16:32:15,752 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)] === [2024-06-20 16:32:15,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:15,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1862398783, now seen corresponding path program 1 times [2024-06-20 16:32:15,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:15,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106585919] [2024-06-20 16:32:15,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:15,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:15,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:16,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:16,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:16,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106585919] [2024-06-20 16:32:16,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106585919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:16,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:16,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 16:32:16,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026407141] [2024-06-20 16:32:16,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:16,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 16:32:16,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:16,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 16:32:16,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-20 16:32:16,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:32:16,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:16,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:16,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:32:16,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:16,530 INFO L124 PetriNetUnfolderBase]: 1661/2481 cut-off events. [2024-06-20 16:32:16,530 INFO L125 PetriNetUnfolderBase]: For 1306/1306 co-relation queries the response was YES. [2024-06-20 16:32:16,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6307 conditions, 2481 events. 1661/2481 cut-off events. For 1306/1306 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11220 event pairs, 812 based on Foata normal form. 5/2484 useless extension candidates. Maximal degree in co-relation 6293. Up to 2387 conditions per place. [2024-06-20 16:32:16,541 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 53 selfloop transitions, 16 changer transitions 0/73 dead transitions. [2024-06-20 16:32:16,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 73 transitions, 392 flow [2024-06-20 16:32:16,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:32:16,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:32:16,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-20 16:32:16,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-06-20 16:32:16,545 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 134 flow. Second operand 5 states and 118 transitions. [2024-06-20 16:32:16,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 73 transitions, 392 flow [2024-06-20 16:32:16,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 73 transitions, 378 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-20 16:32:16,549 INFO L231 Difference]: Finished difference. Result has 49 places, 48 transitions, 233 flow [2024-06-20 16:32:16,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=233, PETRI_PLACES=49, PETRI_TRANSITIONS=48} [2024-06-20 16:32:16,550 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2024-06-20 16:32:16,550 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 48 transitions, 233 flow [2024-06-20 16:32:16,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:16,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:16,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:16,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 16:32:16,551 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:32:16,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:16,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1816671558, now seen corresponding path program 1 times [2024-06-20 16:32:16,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:16,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408595559] [2024-06-20 16:32:16,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:16,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:16,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:17,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:17,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:17,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408595559] [2024-06-20 16:32:17,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408595559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:17,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:17,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:32:17,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186922039] [2024-06-20 16:32:17,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:17,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:32:17,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:17,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:32:17,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:32:17,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:32:17,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 48 transitions, 233 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:17,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:17,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:32:17,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:17,681 INFO L124 PetriNetUnfolderBase]: 1669/2493 cut-off events. [2024-06-20 16:32:17,681 INFO L125 PetriNetUnfolderBase]: For 3035/3038 co-relation queries the response was YES. [2024-06-20 16:32:17,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7426 conditions, 2493 events. 1669/2493 cut-off events. For 3035/3038 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11299 event pairs, 666 based on Foata normal form. 7/2498 useless extension candidates. Maximal degree in co-relation 7409. Up to 2373 conditions per place. [2024-06-20 16:32:17,695 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 60 selfloop transitions, 20 changer transitions 0/84 dead transitions. [2024-06-20 16:32:17,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 84 transitions, 519 flow [2024-06-20 16:32:17,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:32:17,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:32:17,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-20 16:32:17,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-06-20 16:32:17,696 INFO L175 Difference]: Start difference. First operand has 49 places, 48 transitions, 233 flow. Second operand 6 states and 139 transitions. [2024-06-20 16:32:17,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 84 transitions, 519 flow [2024-06-20 16:32:17,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 84 transitions, 511 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-20 16:32:17,700 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 306 flow [2024-06-20 16:32:17,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=306, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2024-06-20 16:32:17,701 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2024-06-20 16:32:17,701 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 306 flow [2024-06-20 16:32:17,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:17,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:17,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:17,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 16:32:17,702 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:32:17,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:17,702 INFO L85 PathProgramCache]: Analyzing trace with hash 482244504, now seen corresponding path program 1 times [2024-06-20 16:32:17,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:17,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198499191] [2024-06-20 16:32:17,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:17,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:17,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:18,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:18,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:18,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198499191] [2024-06-20 16:32:18,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198499191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:18,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:18,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:32:18,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680347903] [2024-06-20 16:32:18,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:18,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:32:18,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:18,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:32:18,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:32:18,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-20 16:32:18,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 306 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:18,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:18,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-20 16:32:18,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:18,944 INFO L124 PetriNetUnfolderBase]: 1681/2513 cut-off events. [2024-06-20 16:32:18,945 INFO L125 PetriNetUnfolderBase]: For 4785/4788 co-relation queries the response was YES. [2024-06-20 16:32:18,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8297 conditions, 2513 events. 1681/2513 cut-off events. For 4785/4788 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 11425 event pairs, 502 based on Foata normal form. 12/2523 useless extension candidates. Maximal degree in co-relation 8277. Up to 2341 conditions per place. [2024-06-20 16:32:18,959 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 64 selfloop transitions, 23 changer transitions 0/91 dead transitions. [2024-06-20 16:32:18,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 91 transitions, 620 flow [2024-06-20 16:32:18,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:32:18,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:32:18,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-20 16:32:18,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2024-06-20 16:32:18,961 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 306 flow. Second operand 7 states and 156 transitions. [2024-06-20 16:32:18,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 91 transitions, 620 flow [2024-06-20 16:32:18,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 91 transitions, 571 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 16:32:18,965 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 333 flow [2024-06-20 16:32:18,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=333, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2024-06-20 16:32:18,966 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2024-06-20 16:32:18,966 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 333 flow [2024-06-20 16:32:18,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:18,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:18,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:18,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 16:32:18,967 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)] === [2024-06-20 16:32:18,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:18,968 INFO L85 PathProgramCache]: Analyzing trace with hash -16334918, now seen corresponding path program 1 times [2024-06-20 16:32:18,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:18,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722390269] [2024-06-20 16:32:18,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:18,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:18,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:19,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:19,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:19,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722390269] [2024-06-20 16:32:19,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722390269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:19,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:19,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:32:19,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771275797] [2024-06-20 16:32:19,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:19,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:32:19,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:19,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:32:19,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:32:19,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:32:19,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 333 flow. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:19,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:19,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:32:19,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:19,817 INFO L124 PetriNetUnfolderBase]: 1676/2505 cut-off events. [2024-06-20 16:32:19,817 INFO L125 PetriNetUnfolderBase]: For 6458/6458 co-relation queries the response was YES. [2024-06-20 16:32:19,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8823 conditions, 2505 events. 1676/2505 cut-off events. For 6458/6458 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 11357 event pairs, 659 based on Foata normal form. 2/2506 useless extension candidates. Maximal degree in co-relation 8801. Up to 2484 conditions per place. [2024-06-20 16:32:19,832 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 54 selfloop transitions, 8 changer transitions 0/65 dead transitions. [2024-06-20 16:32:19,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 65 transitions, 485 flow [2024-06-20 16:32:19,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:32:19,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:32:19,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2024-06-20 16:32:19,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43 [2024-06-20 16:32:19,833 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 333 flow. Second operand 5 states and 86 transitions. [2024-06-20 16:32:19,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 65 transitions, 485 flow [2024-06-20 16:32:19,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 65 transitions, 421 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 16:32:19,838 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 293 flow [2024-06-20 16:32:19,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=293, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2024-06-20 16:32:19,839 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2024-06-20 16:32:19,839 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 293 flow [2024-06-20 16:32:19,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:19,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:19,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:19,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 16:32:19,840 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)] === [2024-06-20 16:32:19,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:19,840 INFO L85 PathProgramCache]: Analyzing trace with hash -540544680, now seen corresponding path program 1 times [2024-06-20 16:32:19,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:19,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753027076] [2024-06-20 16:32:19,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:19,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:19,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:20,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:20,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:20,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753027076] [2024-06-20 16:32:20,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753027076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:20,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:20,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:32:20,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059090185] [2024-06-20 16:32:20,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:20,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:32:20,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:20,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:32:20,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:32:20,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:32:20,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 293 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:20,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:20,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:32:20,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:20,882 INFO L124 PetriNetUnfolderBase]: 1708/2551 cut-off events. [2024-06-20 16:32:20,883 INFO L125 PetriNetUnfolderBase]: For 7708/7708 co-relation queries the response was YES. [2024-06-20 16:32:20,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8929 conditions, 2551 events. 1708/2551 cut-off events. For 7708/7708 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 11539 event pairs, 621 based on Foata normal form. 10/2560 useless extension candidates. Maximal degree in co-relation 8905. Up to 2402 conditions per place. [2024-06-20 16:32:20,896 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 70 selfloop transitions, 17 changer transitions 0/90 dead transitions. [2024-06-20 16:32:20,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 90 transitions, 609 flow [2024-06-20 16:32:20,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:32:20,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:32:20,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-20 16:32:20,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-20 16:32:20,898 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 293 flow. Second operand 6 states and 115 transitions. [2024-06-20 16:32:20,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 90 transitions, 609 flow [2024-06-20 16:32:20,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 90 transitions, 587 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-20 16:32:20,905 INFO L231 Difference]: Finished difference. Result has 61 places, 65 transitions, 402 flow [2024-06-20 16:32:20,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=402, PETRI_PLACES=61, PETRI_TRANSITIONS=65} [2024-06-20 16:32:20,905 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 20 predicate places. [2024-06-20 16:32:20,906 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 65 transitions, 402 flow [2024-06-20 16:32:20,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:20,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:20,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:20,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 16:32:20,906 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)] === [2024-06-20 16:32:20,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:20,907 INFO L85 PathProgramCache]: Analyzing trace with hash 417263607, now seen corresponding path program 1 times [2024-06-20 16:32:20,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:20,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296281498] [2024-06-20 16:32:20,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:20,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:20,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:21,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:21,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:21,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296281498] [2024-06-20 16:32:21,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296281498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:21,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:21,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:32:21,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918754880] [2024-06-20 16:32:21,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:21,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:32:21,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:21,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:32:21,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:32:21,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:32:21,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 65 transitions, 402 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:21,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:21,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:32:21,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:21,885 INFO L124 PetriNetUnfolderBase]: 1714/2561 cut-off events. [2024-06-20 16:32:21,885 INFO L125 PetriNetUnfolderBase]: For 10531/10537 co-relation queries the response was YES. [2024-06-20 16:32:21,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10002 conditions, 2561 events. 1714/2561 cut-off events. For 10531/10537 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11678 event pairs, 648 based on Foata normal form. 8/2567 useless extension candidates. Maximal degree in co-relation 9976. Up to 2464 conditions per place. [2024-06-20 16:32:21,898 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 66 selfloop transitions, 19 changer transitions 0/88 dead transitions. [2024-06-20 16:32:21,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 88 transitions, 672 flow [2024-06-20 16:32:21,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:32:21,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:32:21,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-20 16:32:21,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-20 16:32:21,899 INFO L175 Difference]: Start difference. First operand has 61 places, 65 transitions, 402 flow. Second operand 6 states and 110 transitions. [2024-06-20 16:32:21,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 88 transitions, 672 flow [2024-06-20 16:32:21,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 88 transitions, 654 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-20 16:32:21,906 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 456 flow [2024-06-20 16:32:21,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=456, PETRI_PLACES=66, PETRI_TRANSITIONS=68} [2024-06-20 16:32:21,909 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 25 predicate places. [2024-06-20 16:32:21,909 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 456 flow [2024-06-20 16:32:21,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:21,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:21,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:21,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 16:32:21,910 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)] === [2024-06-20 16:32:21,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:21,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1482047577, now seen corresponding path program 2 times [2024-06-20 16:32:21,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:21,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010410931] [2024-06-20 16:32:21,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:21,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:21,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:22,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:22,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:22,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010410931] [2024-06-20 16:32:22,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010410931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:22,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:22,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:32:22,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217472579] [2024-06-20 16:32:22,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:22,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:32:22,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:22,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:32:22,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:32:22,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:32:22,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 456 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:22,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:22,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:32:22,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:22,868 INFO L124 PetriNetUnfolderBase]: 1699/2554 cut-off events. [2024-06-20 16:32:22,869 INFO L125 PetriNetUnfolderBase]: For 12610/12610 co-relation queries the response was YES. [2024-06-20 16:32:22,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10122 conditions, 2554 events. 1699/2554 cut-off events. For 12610/12610 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 11766 event pairs, 934 based on Foata normal form. 2/2555 useless extension candidates. Maximal degree in co-relation 10093. Up to 2505 conditions per place. [2024-06-20 16:32:22,882 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 68 selfloop transitions, 13 changer transitions 0/84 dead transitions. [2024-06-20 16:32:22,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 84 transitions, 670 flow [2024-06-20 16:32:22,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:32:22,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:32:22,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-20 16:32:22,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-20 16:32:22,883 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 456 flow. Second operand 7 states and 110 transitions. [2024-06-20 16:32:22,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 84 transitions, 670 flow [2024-06-20 16:32:22,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 84 transitions, 640 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 16:32:22,894 INFO L231 Difference]: Finished difference. Result has 71 places, 70 transitions, 481 flow [2024-06-20 16:32:22,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=481, PETRI_PLACES=71, PETRI_TRANSITIONS=70} [2024-06-20 16:32:22,894 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 30 predicate places. [2024-06-20 16:32:22,895 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 70 transitions, 481 flow [2024-06-20 16:32:22,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:22,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:22,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:22,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 16:32:22,895 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)] === [2024-06-20 16:32:22,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:22,896 INFO L85 PathProgramCache]: Analyzing trace with hash 309080623, now seen corresponding path program 1 times [2024-06-20 16:32:22,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:22,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599976183] [2024-06-20 16:32:22,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:22,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:22,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:23,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:23,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:23,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599976183] [2024-06-20 16:32:23,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599976183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:23,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:23,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:32:23,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663024087] [2024-06-20 16:32:23,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:23,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:32:23,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:23,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:32:23,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:32:23,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:32:23,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 481 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:23,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:23,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:32:23,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:24,134 INFO L124 PetriNetUnfolderBase]: 2293/3380 cut-off events. [2024-06-20 16:32:24,134 INFO L125 PetriNetUnfolderBase]: For 18159/18167 co-relation queries the response was YES. [2024-06-20 16:32:24,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13540 conditions, 3380 events. 2293/3380 cut-off events. For 18159/18167 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 15770 event pairs, 620 based on Foata normal form. 28/3405 useless extension candidates. Maximal degree in co-relation 13509. Up to 2561 conditions per place. [2024-06-20 16:32:24,152 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 120 selfloop transitions, 38 changer transitions 0/161 dead transitions. [2024-06-20 16:32:24,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 161 transitions, 1379 flow [2024-06-20 16:32:24,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:32:24,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:32:24,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-20 16:32:24,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51875 [2024-06-20 16:32:24,154 INFO L175 Difference]: Start difference. First operand has 71 places, 70 transitions, 481 flow. Second operand 8 states and 166 transitions. [2024-06-20 16:32:24,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 161 transitions, 1379 flow [2024-06-20 16:32:24,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 161 transitions, 1295 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 16:32:24,172 INFO L231 Difference]: Finished difference. Result has 77 places, 101 transitions, 778 flow [2024-06-20 16:32:24,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=778, PETRI_PLACES=77, PETRI_TRANSITIONS=101} [2024-06-20 16:32:24,174 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 36 predicate places. [2024-06-20 16:32:24,176 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 101 transitions, 778 flow [2024-06-20 16:32:24,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:24,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:24,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:24,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 16:32:24,176 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)] === [2024-06-20 16:32:24,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:24,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1934560225, now seen corresponding path program 2 times [2024-06-20 16:32:24,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:24,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615648411] [2024-06-20 16:32:24,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:24,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:24,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:24,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:24,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:24,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615648411] [2024-06-20 16:32:24,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615648411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:24,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:24,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:32:24,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873781436] [2024-06-20 16:32:24,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:24,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:32:24,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:24,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:32:24,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:32:24,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:32:24,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 101 transitions, 778 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:24,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:24,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:32:24,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:25,563 INFO L124 PetriNetUnfolderBase]: 2997/4363 cut-off events. [2024-06-20 16:32:25,564 INFO L125 PetriNetUnfolderBase]: For 31476/31484 co-relation queries the response was YES. [2024-06-20 16:32:25,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21202 conditions, 4363 events. 2997/4363 cut-off events. For 31476/31484 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 21081 event pairs, 719 based on Foata normal form. 44/4404 useless extension candidates. Maximal degree in co-relation 21166. Up to 2867 conditions per place. [2024-06-20 16:32:25,587 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 105 selfloop transitions, 60 changer transitions 0/168 dead transitions. [2024-06-20 16:32:25,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 168 transitions, 1576 flow [2024-06-20 16:32:25,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:32:25,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:32:25,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-20 16:32:25,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-06-20 16:32:25,589 INFO L175 Difference]: Start difference. First operand has 77 places, 101 transitions, 778 flow. Second operand 7 states and 144 transitions. [2024-06-20 16:32:25,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 168 transitions, 1576 flow [2024-06-20 16:32:25,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 168 transitions, 1530 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-20 16:32:25,616 INFO L231 Difference]: Finished difference. Result has 85 places, 123 transitions, 1120 flow [2024-06-20 16:32:25,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=740, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1120, PETRI_PLACES=85, PETRI_TRANSITIONS=123} [2024-06-20 16:32:25,616 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 44 predicate places. [2024-06-20 16:32:25,617 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 123 transitions, 1120 flow [2024-06-20 16:32:25,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:25,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:25,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:25,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 16:32:25,617 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)] === [2024-06-20 16:32:25,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:25,618 INFO L85 PathProgramCache]: Analyzing trace with hash -339036293, now seen corresponding path program 3 times [2024-06-20 16:32:25,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:25,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114554831] [2024-06-20 16:32:25,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:25,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:25,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:26,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:26,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:26,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114554831] [2024-06-20 16:32:26,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114554831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:26,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:26,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:32:26,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849216126] [2024-06-20 16:32:26,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:26,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:32:26,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:26,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:32:26,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:32:26,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:32:26,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 123 transitions, 1120 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:26,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:26,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:32:26,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:26,946 INFO L124 PetriNetUnfolderBase]: 3117/4545 cut-off events. [2024-06-20 16:32:26,946 INFO L125 PetriNetUnfolderBase]: For 42842/42842 co-relation queries the response was YES. [2024-06-20 16:32:26,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25130 conditions, 4545 events. 3117/4545 cut-off events. For 42842/42842 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 22089 event pairs, 1175 based on Foata normal form. 18/4562 useless extension candidates. Maximal degree in co-relation 25089. Up to 4208 conditions per place. [2024-06-20 16:32:26,974 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 144 selfloop transitions, 27 changer transitions 0/174 dead transitions. [2024-06-20 16:32:26,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 174 transitions, 1859 flow [2024-06-20 16:32:26,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:32:26,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:32:26,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-20 16:32:26,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-06-20 16:32:26,975 INFO L175 Difference]: Start difference. First operand has 85 places, 123 transitions, 1120 flow. Second operand 7 states and 132 transitions. [2024-06-20 16:32:26,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 174 transitions, 1859 flow [2024-06-20 16:32:27,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 174 transitions, 1793 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-20 16:32:27,016 INFO L231 Difference]: Finished difference. Result has 92 places, 137 transitions, 1306 flow [2024-06-20 16:32:27,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1063, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1306, PETRI_PLACES=92, PETRI_TRANSITIONS=137} [2024-06-20 16:32:27,017 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 51 predicate places. [2024-06-20 16:32:27,017 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 137 transitions, 1306 flow [2024-06-20 16:32:27,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:27,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:27,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:27,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 16:32:27,018 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)] === [2024-06-20 16:32:27,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:27,018 INFO L85 PathProgramCache]: Analyzing trace with hash 227639927, now seen corresponding path program 4 times [2024-06-20 16:32:27,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:27,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118480678] [2024-06-20 16:32:27,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:27,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:27,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:27,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:27,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118480678] [2024-06-20 16:32:27,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118480678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:27,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:27,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:32:27,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525911833] [2024-06-20 16:32:27,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:27,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:32:27,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:27,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:32:27,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:32:27,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:32:27,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 137 transitions, 1306 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:27,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:27,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:32:27,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:28,306 INFO L124 PetriNetUnfolderBase]: 3143/4583 cut-off events. [2024-06-20 16:32:28,306 INFO L125 PetriNetUnfolderBase]: For 47343/47343 co-relation queries the response was YES. [2024-06-20 16:32:28,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25781 conditions, 4583 events. 3143/4583 cut-off events. For 47343/47343 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 22338 event pairs, 1201 based on Foata normal form. 12/4594 useless extension candidates. Maximal degree in co-relation 25736. Up to 4459 conditions per place. [2024-06-20 16:32:28,362 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 146 selfloop transitions, 23 changer transitions 0/172 dead transitions. [2024-06-20 16:32:28,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 172 transitions, 1882 flow [2024-06-20 16:32:28,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:32:28,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:32:28,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-20 16:32:28,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-20 16:32:28,364 INFO L175 Difference]: Start difference. First operand has 92 places, 137 transitions, 1306 flow. Second operand 7 states and 126 transitions. [2024-06-20 16:32:28,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 172 transitions, 1882 flow [2024-06-20 16:32:28,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 172 transitions, 1822 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-20 16:32:28,413 INFO L231 Difference]: Finished difference. Result has 99 places, 146 transitions, 1433 flow [2024-06-20 16:32:28,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1252, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1433, PETRI_PLACES=99, PETRI_TRANSITIONS=146} [2024-06-20 16:32:28,415 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 58 predicate places. [2024-06-20 16:32:28,415 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 146 transitions, 1433 flow [2024-06-20 16:32:28,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:28,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:28,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:28,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 16:32:28,415 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)] === [2024-06-20 16:32:28,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:28,416 INFO L85 PathProgramCache]: Analyzing trace with hash 227648855, now seen corresponding path program 1 times [2024-06-20 16:32:28,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:28,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253224274] [2024-06-20 16:32:28,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:28,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:28,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:29,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:29,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:29,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253224274] [2024-06-20 16:32:29,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253224274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:29,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:29,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:32:29,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704758707] [2024-06-20 16:32:29,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:29,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:32:29,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:29,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:32:29,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:32:29,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:32:29,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 146 transitions, 1433 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:29,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:29,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:32:29,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:30,179 INFO L124 PetriNetUnfolderBase]: 3206/4684 cut-off events. [2024-06-20 16:32:30,179 INFO L125 PetriNetUnfolderBase]: For 49489/49489 co-relation queries the response was YES. [2024-06-20 16:32:30,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25949 conditions, 4684 events. 3206/4684 cut-off events. For 49489/49489 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 22970 event pairs, 1182 based on Foata normal form. 18/4701 useless extension candidates. Maximal degree in co-relation 25900. Up to 4411 conditions per place. [2024-06-20 16:32:30,209 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 153 selfloop transitions, 26 changer transitions 0/182 dead transitions. [2024-06-20 16:32:30,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 182 transitions, 1989 flow [2024-06-20 16:32:30,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:32:30,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:32:30,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-20 16:32:30,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-06-20 16:32:30,210 INFO L175 Difference]: Start difference. First operand has 99 places, 146 transitions, 1433 flow. Second operand 7 states and 136 transitions. [2024-06-20 16:32:30,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 182 transitions, 1989 flow [2024-06-20 16:32:30,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 182 transitions, 1929 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-20 16:32:30,250 INFO L231 Difference]: Finished difference. Result has 102 places, 148 transitions, 1465 flow [2024-06-20 16:32:30,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1373, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1465, PETRI_PLACES=102, PETRI_TRANSITIONS=148} [2024-06-20 16:32:30,251 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 61 predicate places. [2024-06-20 16:32:30,251 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 148 transitions, 1465 flow [2024-06-20 16:32:30,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:30,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:30,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:30,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 16:32:30,251 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)] === [2024-06-20 16:32:30,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:30,252 INFO L85 PathProgramCache]: Analyzing trace with hash -587697519, now seen corresponding path program 1 times [2024-06-20 16:32:30,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:30,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350596053] [2024-06-20 16:32:30,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:30,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:30,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:30,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:30,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:30,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350596053] [2024-06-20 16:32:30,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350596053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:30,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:30,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:32:30,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408665033] [2024-06-20 16:32:30,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:30,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:32:30,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:30,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:32:30,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:32:30,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:32:30,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 148 transitions, 1465 flow. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:30,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:30,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:32:30,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:31,450 INFO L124 PetriNetUnfolderBase]: 3197/4672 cut-off events. [2024-06-20 16:32:31,451 INFO L125 PetriNetUnfolderBase]: For 51824/51824 co-relation queries the response was YES. [2024-06-20 16:32:31,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26217 conditions, 4672 events. 3197/4672 cut-off events. For 51824/51824 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 22838 event pairs, 1218 based on Foata normal form. 3/4674 useless extension candidates. Maximal degree in co-relation 26167. Up to 4631 conditions per place. [2024-06-20 16:32:31,479 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 142 selfloop transitions, 11 changer transitions 0/156 dead transitions. [2024-06-20 16:32:31,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 156 transitions, 1793 flow [2024-06-20 16:32:31,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:32:31,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:32:31,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-06-20 16:32:31,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42 [2024-06-20 16:32:31,481 INFO L175 Difference]: Start difference. First operand has 102 places, 148 transitions, 1465 flow. Second operand 5 states and 84 transitions. [2024-06-20 16:32:31,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 156 transitions, 1793 flow [2024-06-20 16:32:31,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 156 transitions, 1707 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-20 16:32:31,569 INFO L231 Difference]: Finished difference. Result has 102 places, 148 transitions, 1409 flow [2024-06-20 16:32:31,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1379, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1409, PETRI_PLACES=102, PETRI_TRANSITIONS=148} [2024-06-20 16:32:31,570 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 61 predicate places. [2024-06-20 16:32:31,570 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 148 transitions, 1409 flow [2024-06-20 16:32:31,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:31,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:31,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:31,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 16:32:31,571 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)] === [2024-06-20 16:32:31,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:31,571 INFO L85 PathProgramCache]: Analyzing trace with hash -916347818, now seen corresponding path program 1 times [2024-06-20 16:32:31,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:31,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36650821] [2024-06-20 16:32:31,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:31,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:31,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:32,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:32,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:32,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36650821] [2024-06-20 16:32:32,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36650821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:32,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:32,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:32:32,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294085351] [2024-06-20 16:32:32,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:32,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:32:32,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:32,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:32:32,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:32:32,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:32:32,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 148 transitions, 1409 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:32,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:32,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:32:32,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:33,032 INFO L124 PetriNetUnfolderBase]: 3247/4741 cut-off events. [2024-06-20 16:32:33,032 INFO L125 PetriNetUnfolderBase]: For 54668/54685 co-relation queries the response was YES. [2024-06-20 16:32:33,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26624 conditions, 4741 events. 3247/4741 cut-off events. For 54668/54685 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 23210 event pairs, 853 based on Foata normal form. 16/4755 useless extension candidates. Maximal degree in co-relation 26573. Up to 4535 conditions per place. [2024-06-20 16:32:33,064 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 153 selfloop transitions, 40 changer transitions 0/196 dead transitions. [2024-06-20 16:32:33,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 196 transitions, 2121 flow [2024-06-20 16:32:33,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:32:33,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:32:33,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 16:32:33,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-20 16:32:33,065 INFO L175 Difference]: Start difference. First operand has 102 places, 148 transitions, 1409 flow. Second operand 8 states and 144 transitions. [2024-06-20 16:32:33,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 196 transitions, 2121 flow [2024-06-20 16:32:33,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 196 transitions, 2084 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-20 16:32:33,112 INFO L231 Difference]: Finished difference. Result has 108 places, 166 transitions, 1658 flow [2024-06-20 16:32:33,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1372, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1658, PETRI_PLACES=108, PETRI_TRANSITIONS=166} [2024-06-20 16:32:33,112 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-06-20 16:32:33,112 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 166 transitions, 1658 flow [2024-06-20 16:32:33,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:33,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:33,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:33,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 16:32:33,113 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)] === [2024-06-20 16:32:33,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:33,113 INFO L85 PathProgramCache]: Analyzing trace with hash -912480878, now seen corresponding path program 2 times [2024-06-20 16:32:33,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:33,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866556856] [2024-06-20 16:32:33,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:33,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:33,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:33,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:33,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:33,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866556856] [2024-06-20 16:32:33,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866556856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:33,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:33,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:32:33,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364574947] [2024-06-20 16:32:33,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:33,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:32:33,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:33,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:32:33,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:32:33,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:32:33,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 166 transitions, 1658 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:33,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:33,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:32:33,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:34,636 INFO L124 PetriNetUnfolderBase]: 3252/4746 cut-off events. [2024-06-20 16:32:34,636 INFO L125 PetriNetUnfolderBase]: For 60805/60826 co-relation queries the response was YES. [2024-06-20 16:32:34,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27604 conditions, 4746 events. 3252/4746 cut-off events. For 60805/60826 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 23183 event pairs, 845 based on Foata normal form. 20/4764 useless extension candidates. Maximal degree in co-relation 27551. Up to 4576 conditions per place. [2024-06-20 16:32:34,664 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 157 selfloop transitions, 37 changer transitions 0/197 dead transitions. [2024-06-20 16:32:34,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 197 transitions, 2207 flow [2024-06-20 16:32:34,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:32:34,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:32:34,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 16:32:34,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-20 16:32:34,667 INFO L175 Difference]: Start difference. First operand has 108 places, 166 transitions, 1658 flow. Second operand 8 states and 141 transitions. [2024-06-20 16:32:34,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 197 transitions, 2207 flow [2024-06-20 16:32:34,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 197 transitions, 2142 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-20 16:32:34,723 INFO L231 Difference]: Finished difference. Result has 114 places, 170 transitions, 1740 flow [2024-06-20 16:32:34,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1603, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1740, PETRI_PLACES=114, PETRI_TRANSITIONS=170} [2024-06-20 16:32:34,723 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 73 predicate places. [2024-06-20 16:32:34,724 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 170 transitions, 1740 flow [2024-06-20 16:32:34,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:34,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:34,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:34,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 16:32:34,724 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)] === [2024-06-20 16:32:34,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:34,725 INFO L85 PathProgramCache]: Analyzing trace with hash -502039902, now seen corresponding path program 3 times [2024-06-20 16:32:34,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:34,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367071182] [2024-06-20 16:32:34,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:34,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:34,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:35,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:35,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:35,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367071182] [2024-06-20 16:32:35,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367071182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:35,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:35,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:32:35,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869706643] [2024-06-20 16:32:35,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:35,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:32:35,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:35,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:32:35,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:32:35,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:32:35,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 170 transitions, 1740 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:35,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:35,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:32:35,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:35,964 INFO L124 PetriNetUnfolderBase]: 3292/4807 cut-off events. [2024-06-20 16:32:35,964 INFO L125 PetriNetUnfolderBase]: For 67174/67199 co-relation queries the response was YES. [2024-06-20 16:32:35,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28361 conditions, 4807 events. 3292/4807 cut-off events. For 67174/67199 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 23522 event pairs, 852 based on Foata normal form. 24/4829 useless extension candidates. Maximal degree in co-relation 28306. Up to 4540 conditions per place. [2024-06-20 16:32:35,999 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 148 selfloop transitions, 60 changer transitions 0/211 dead transitions. [2024-06-20 16:32:36,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 211 transitions, 2532 flow [2024-06-20 16:32:36,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:32:36,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:32:36,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-20 16:32:36,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-06-20 16:32:36,002 INFO L175 Difference]: Start difference. First operand has 114 places, 170 transitions, 1740 flow. Second operand 7 states and 132 transitions. [2024-06-20 16:32:36,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 211 transitions, 2532 flow [2024-06-20 16:32:36,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 211 transitions, 2442 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-20 16:32:36,076 INFO L231 Difference]: Finished difference. Result has 118 places, 185 transitions, 2030 flow [2024-06-20 16:32:36,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1650, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2030, PETRI_PLACES=118, PETRI_TRANSITIONS=185} [2024-06-20 16:32:36,076 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 77 predicate places. [2024-06-20 16:32:36,076 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 185 transitions, 2030 flow [2024-06-20 16:32:36,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:36,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:36,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:36,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 16:32:36,077 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)] === [2024-06-20 16:32:36,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:36,077 INFO L85 PathProgramCache]: Analyzing trace with hash 992511673, now seen corresponding path program 1 times [2024-06-20 16:32:36,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:36,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447047666] [2024-06-20 16:32:36,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:36,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:36,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:36,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:36,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:36,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447047666] [2024-06-20 16:32:36,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447047666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:36,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:36,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:32:36,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200385688] [2024-06-20 16:32:36,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:36,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:32:36,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:36,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:32:36,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:32:36,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:32:36,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 185 transitions, 2030 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:36,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:36,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:32:36,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:37,520 INFO L124 PetriNetUnfolderBase]: 3491/5090 cut-off events. [2024-06-20 16:32:37,520 INFO L125 PetriNetUnfolderBase]: For 81981/81992 co-relation queries the response was YES. [2024-06-20 16:32:37,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31315 conditions, 5090 events. 3491/5090 cut-off events. For 81981/81992 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 25271 event pairs, 857 based on Foata normal form. 20/5107 useless extension candidates. Maximal degree in co-relation 31257. Up to 3765 conditions per place. [2024-06-20 16:32:37,554 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 196 selfloop transitions, 70 changer transitions 0/269 dead transitions. [2024-06-20 16:32:37,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 269 transitions, 3477 flow [2024-06-20 16:32:37,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:32:37,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:32:37,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-20 16:32:37,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51875 [2024-06-20 16:32:37,556 INFO L175 Difference]: Start difference. First operand has 118 places, 185 transitions, 2030 flow. Second operand 8 states and 166 transitions. [2024-06-20 16:32:37,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 269 transitions, 3477 flow [2024-06-20 16:32:37,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 269 transitions, 3392 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-20 16:32:37,632 INFO L231 Difference]: Finished difference. Result has 125 places, 206 transitions, 2472 flow [2024-06-20 16:32:37,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1971, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2472, PETRI_PLACES=125, PETRI_TRANSITIONS=206} [2024-06-20 16:32:37,632 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 84 predicate places. [2024-06-20 16:32:37,633 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 206 transitions, 2472 flow [2024-06-20 16:32:37,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:37,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:37,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:37,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 16:32:37,634 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)] === [2024-06-20 16:32:37,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:37,634 INFO L85 PathProgramCache]: Analyzing trace with hash 991565863, now seen corresponding path program 2 times [2024-06-20 16:32:37,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:37,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630355914] [2024-06-20 16:32:37,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:37,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:38,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:38,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:38,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630355914] [2024-06-20 16:32:38,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630355914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:38,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:38,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:32:38,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360382957] [2024-06-20 16:32:38,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:38,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:32:38,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:38,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:32:38,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:32:38,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:32:38,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 206 transitions, 2472 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:38,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:38,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:32:38,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:39,273 INFO L124 PetriNetUnfolderBase]: 3653/5323 cut-off events. [2024-06-20 16:32:39,273 INFO L125 PetriNetUnfolderBase]: For 89508/89523 co-relation queries the response was YES. [2024-06-20 16:32:39,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34677 conditions, 5323 events. 3653/5323 cut-off events. For 89508/89523 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 26670 event pairs, 721 based on Foata normal form. 24/5344 useless extension candidates. Maximal degree in co-relation 34616. Up to 3864 conditions per place. [2024-06-20 16:32:39,315 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 196 selfloop transitions, 81 changer transitions 0/280 dead transitions. [2024-06-20 16:32:39,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 280 transitions, 3814 flow [2024-06-20 16:32:39,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:32:39,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:32:39,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-20 16:32:39,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.509375 [2024-06-20 16:32:39,317 INFO L175 Difference]: Start difference. First operand has 125 places, 206 transitions, 2472 flow. Second operand 8 states and 163 transitions. [2024-06-20 16:32:39,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 280 transitions, 3814 flow [2024-06-20 16:32:39,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 280 transitions, 3688 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-20 16:32:39,446 INFO L231 Difference]: Finished difference. Result has 131 places, 224 transitions, 2859 flow [2024-06-20 16:32:39,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2359, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2859, PETRI_PLACES=131, PETRI_TRANSITIONS=224} [2024-06-20 16:32:39,447 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 90 predicate places. [2024-06-20 16:32:39,447 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 224 transitions, 2859 flow [2024-06-20 16:32:39,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:39,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:39,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:39,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 16:32:39,447 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)] === [2024-06-20 16:32:39,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:39,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1554595094, now seen corresponding path program 4 times [2024-06-20 16:32:39,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:39,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297702305] [2024-06-20 16:32:39,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:39,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:39,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:40,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:40,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:40,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297702305] [2024-06-20 16:32:40,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297702305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:40,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:40,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:32:40,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167533975] [2024-06-20 16:32:40,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:40,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:32:40,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:40,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:32:40,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:32:40,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:32:40,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 224 transitions, 2859 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:40,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:40,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:32:40,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:40,886 INFO L124 PetriNetUnfolderBase]: 3671/5353 cut-off events. [2024-06-20 16:32:40,886 INFO L125 PetriNetUnfolderBase]: For 99279/99300 co-relation queries the response was YES. [2024-06-20 16:32:40,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36420 conditions, 5353 events. 3671/5353 cut-off events. For 99279/99300 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 26700 event pairs, 938 based on Foata normal form. 21/5372 useless extension candidates. Maximal degree in co-relation 36356. Up to 5047 conditions per place. [2024-06-20 16:32:40,943 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 185 selfloop transitions, 67 changer transitions 0/255 dead transitions. [2024-06-20 16:32:40,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 255 transitions, 3633 flow [2024-06-20 16:32:40,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:32:40,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:32:40,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-20 16:32:40,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-20 16:32:40,945 INFO L175 Difference]: Start difference. First operand has 131 places, 224 transitions, 2859 flow. Second operand 7 states and 128 transitions. [2024-06-20 16:32:40,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 255 transitions, 3633 flow [2024-06-20 16:32:41,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 255 transitions, 3515 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-20 16:32:41,123 INFO L231 Difference]: Finished difference. Result has 134 places, 230 transitions, 3004 flow [2024-06-20 16:32:41,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2741, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3004, PETRI_PLACES=134, PETRI_TRANSITIONS=230} [2024-06-20 16:32:41,123 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 93 predicate places. [2024-06-20 16:32:41,123 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 230 transitions, 3004 flow [2024-06-20 16:32:41,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:41,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:41,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:41,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 16:32:41,124 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)] === [2024-06-20 16:32:41,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:41,124 INFO L85 PathProgramCache]: Analyzing trace with hash -539237866, now seen corresponding path program 5 times [2024-06-20 16:32:41,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:41,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143467298] [2024-06-20 16:32:41,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:41,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:41,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:41,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:41,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:41,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143467298] [2024-06-20 16:32:41,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143467298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:41,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:41,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:32:41,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483863697] [2024-06-20 16:32:41,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:41,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:32:41,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:41,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:32:41,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:32:41,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:32:41,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 230 transitions, 3004 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:41,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:41,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:32:41,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:42,663 INFO L124 PetriNetUnfolderBase]: 3660/5341 cut-off events. [2024-06-20 16:32:42,663 INFO L125 PetriNetUnfolderBase]: For 105123/105144 co-relation queries the response was YES. [2024-06-20 16:32:42,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35979 conditions, 5341 events. 3660/5341 cut-off events. For 105123/105144 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 26683 event pairs, 972 based on Foata normal form. 22/5361 useless extension candidates. Maximal degree in co-relation 35914. Up to 5125 conditions per place. [2024-06-20 16:32:42,699 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 198 selfloop transitions, 51 changer transitions 0/252 dead transitions. [2024-06-20 16:32:42,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 252 transitions, 3595 flow [2024-06-20 16:32:42,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:32:42,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:32:42,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-20 16:32:42,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2024-06-20 16:32:42,701 INFO L175 Difference]: Start difference. First operand has 134 places, 230 transitions, 3004 flow. Second operand 7 states and 123 transitions. [2024-06-20 16:32:42,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 252 transitions, 3595 flow [2024-06-20 16:32:42,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 252 transitions, 3350 flow, removed 78 selfloop flow, removed 4 redundant places. [2024-06-20 16:32:42,844 INFO L231 Difference]: Finished difference. Result has 137 places, 230 transitions, 2880 flow [2024-06-20 16:32:42,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2759, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2880, PETRI_PLACES=137, PETRI_TRANSITIONS=230} [2024-06-20 16:32:42,845 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 96 predicate places. [2024-06-20 16:32:42,845 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 230 transitions, 2880 flow [2024-06-20 16:32:42,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:42,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:42,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:42,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 16:32:42,845 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)] === [2024-06-20 16:32:42,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:42,846 INFO L85 PathProgramCache]: Analyzing trace with hash -535518641, now seen corresponding path program 3 times [2024-06-20 16:32:42,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:42,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735346081] [2024-06-20 16:32:42,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:42,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:42,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:43,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:43,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:43,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735346081] [2024-06-20 16:32:43,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735346081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:43,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:43,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:32:43,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014429940] [2024-06-20 16:32:43,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:43,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:32:43,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:43,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:32:43,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:32:43,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:32:43,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 230 transitions, 2880 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:43,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:43,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:32:43,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:44,330 INFO L124 PetriNetUnfolderBase]: 3726/5441 cut-off events. [2024-06-20 16:32:44,330 INFO L125 PetriNetUnfolderBase]: For 117251/117260 co-relation queries the response was YES. [2024-06-20 16:32:44,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36565 conditions, 5441 events. 3726/5441 cut-off events. For 117251/117260 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 27463 event pairs, 1080 based on Foata normal form. 28/5466 useless extension candidates. Maximal degree in co-relation 36499. Up to 3437 conditions per place. [2024-06-20 16:32:44,371 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 166 selfloop transitions, 118 changer transitions 0/287 dead transitions. [2024-06-20 16:32:44,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 287 transitions, 4044 flow [2024-06-20 16:32:44,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:32:44,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:32:44,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-20 16:32:44,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5214285714285715 [2024-06-20 16:32:44,374 INFO L175 Difference]: Start difference. First operand has 137 places, 230 transitions, 2880 flow. Second operand 7 states and 146 transitions. [2024-06-20 16:32:44,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 287 transitions, 4044 flow [2024-06-20 16:32:44,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 287 transitions, 3879 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-20 16:32:44,499 INFO L231 Difference]: Finished difference. Result has 139 places, 243 transitions, 3318 flow [2024-06-20 16:32:44,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2723, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3318, PETRI_PLACES=139, PETRI_TRANSITIONS=243} [2024-06-20 16:32:44,500 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 98 predicate places. [2024-06-20 16:32:44,500 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 243 transitions, 3318 flow [2024-06-20 16:32:44,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:44,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:44,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:44,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 16:32:44,501 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)] === [2024-06-20 16:32:44,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:44,501 INFO L85 PathProgramCache]: Analyzing trace with hash -535513061, now seen corresponding path program 4 times [2024-06-20 16:32:44,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:44,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738882469] [2024-06-20 16:32:44,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:44,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:44,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:45,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:45,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:45,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738882469] [2024-06-20 16:32:45,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738882469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:45,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:45,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:32:45,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606636210] [2024-06-20 16:32:45,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:45,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:32:45,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:45,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:32:45,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:32:45,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:32:45,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 243 transitions, 3318 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:45,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:45,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:32:45,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:45,919 INFO L124 PetriNetUnfolderBase]: 3818/5571 cut-off events. [2024-06-20 16:32:45,919 INFO L125 PetriNetUnfolderBase]: For 126131/126142 co-relation queries the response was YES. [2024-06-20 16:32:45,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40407 conditions, 5571 events. 3818/5571 cut-off events. For 126131/126142 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 28096 event pairs, 761 based on Foata normal form. 24/5592 useless extension candidates. Maximal degree in co-relation 40339. Up to 3503 conditions per place. [2024-06-20 16:32:45,968 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 167 selfloop transitions, 121 changer transitions 0/291 dead transitions. [2024-06-20 16:32:45,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 291 transitions, 4361 flow [2024-06-20 16:32:45,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:32:45,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:32:45,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-20 16:32:45,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5035714285714286 [2024-06-20 16:32:45,969 INFO L175 Difference]: Start difference. First operand has 139 places, 243 transitions, 3318 flow. Second operand 7 states and 141 transitions. [2024-06-20 16:32:45,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 291 transitions, 4361 flow [2024-06-20 16:32:46,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 291 transitions, 4172 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-20 16:32:46,163 INFO L231 Difference]: Finished difference. Result has 143 places, 252 transitions, 3554 flow [2024-06-20 16:32:46,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3153, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3554, PETRI_PLACES=143, PETRI_TRANSITIONS=252} [2024-06-20 16:32:46,164 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 102 predicate places. [2024-06-20 16:32:46,164 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 252 transitions, 3554 flow [2024-06-20 16:32:46,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:46,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:46,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:46,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 16:32:46,165 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)] === [2024-06-20 16:32:46,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:46,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1674026815, now seen corresponding path program 5 times [2024-06-20 16:32:46,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:46,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788620000] [2024-06-20 16:32:46,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:46,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:46,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:46,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:46,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:46,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788620000] [2024-06-20 16:32:46,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788620000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:46,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:46,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:32:46,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387453588] [2024-06-20 16:32:46,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:46,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:32:46,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:46,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:32:46,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:32:46,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:32:46,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 252 transitions, 3554 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:46,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:46,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:32:46,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:47,838 INFO L124 PetriNetUnfolderBase]: 3838/5604 cut-off events. [2024-06-20 16:32:47,838 INFO L125 PetriNetUnfolderBase]: For 128536/128545 co-relation queries the response was YES. [2024-06-20 16:32:47,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40330 conditions, 5604 events. 3838/5604 cut-off events. For 128536/128545 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 28303 event pairs, 1359 based on Foata normal form. 20/5622 useless extension candidates. Maximal degree in co-relation 40261. Up to 5379 conditions per place. [2024-06-20 16:32:47,891 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 257 selfloop transitions, 32 changer transitions 0/292 dead transitions. [2024-06-20 16:32:47,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 292 transitions, 4461 flow [2024-06-20 16:32:47,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:32:47,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:32:47,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 16:32:47,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-20 16:32:47,892 INFO L175 Difference]: Start difference. First operand has 143 places, 252 transitions, 3554 flow. Second operand 8 states and 138 transitions. [2024-06-20 16:32:47,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 292 transitions, 4461 flow [2024-06-20 16:32:48,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 292 transitions, 4250 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-20 16:32:48,106 INFO L231 Difference]: Finished difference. Result has 147 places, 261 transitions, 3593 flow [2024-06-20 16:32:48,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3355, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3593, PETRI_PLACES=147, PETRI_TRANSITIONS=261} [2024-06-20 16:32:48,107 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 106 predicate places. [2024-06-20 16:32:48,107 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 261 transitions, 3593 flow [2024-06-20 16:32:48,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:48,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:48,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:48,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 16:32:48,107 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:32:48,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:48,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1673759688, now seen corresponding path program 1 times [2024-06-20 16:32:48,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:48,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401517189] [2024-06-20 16:32:48,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:48,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:48,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:48,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:48,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401517189] [2024-06-20 16:32:48,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401517189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:48,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:48,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:32:48,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277980171] [2024-06-20 16:32:48,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:48,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:32:48,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:48,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:32:48,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:32:49,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:32:49,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 261 transitions, 3593 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:49,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:49,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:32:49,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:50,005 INFO L124 PetriNetUnfolderBase]: 3868/5647 cut-off events. [2024-06-20 16:32:50,005 INFO L125 PetriNetUnfolderBase]: For 125971/125971 co-relation queries the response was YES. [2024-06-20 16:32:50,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39482 conditions, 5647 events. 3868/5647 cut-off events. For 125971/125971 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 28489 event pairs, 1329 based on Foata normal form. 7/5653 useless extension candidates. Maximal degree in co-relation 39412. Up to 5372 conditions per place. [2024-06-20 16:32:50,066 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 260 selfloop transitions, 34 changer transitions 0/297 dead transitions. [2024-06-20 16:32:50,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 297 transitions, 4415 flow [2024-06-20 16:32:50,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:32:50,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:32:50,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-20 16:32:50,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-20 16:32:50,067 INFO L175 Difference]: Start difference. First operand has 147 places, 261 transitions, 3593 flow. Second operand 7 states and 133 transitions. [2024-06-20 16:32:50,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 297 transitions, 4415 flow [2024-06-20 16:32:50,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 297 transitions, 4335 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-20 16:32:50,240 INFO L231 Difference]: Finished difference. Result has 149 places, 265 transitions, 3667 flow [2024-06-20 16:32:50,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3513, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3667, PETRI_PLACES=149, PETRI_TRANSITIONS=265} [2024-06-20 16:32:50,241 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 108 predicate places. [2024-06-20 16:32:50,241 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 265 transitions, 3667 flow [2024-06-20 16:32:50,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:50,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:50,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:50,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 16:32:50,242 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)] === [2024-06-20 16:32:50,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:50,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1657929468, now seen corresponding path program 1 times [2024-06-20 16:32:50,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:50,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475695120] [2024-06-20 16:32:50,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:50,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:50,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:50,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:50,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:50,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475695120] [2024-06-20 16:32:50,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475695120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:50,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:50,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:32:50,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989064131] [2024-06-20 16:32:50,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:50,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:32:50,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:50,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:32:50,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:32:51,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:32:51,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 265 transitions, 3667 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:51,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:51,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:32:51,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:51,971 INFO L124 PetriNetUnfolderBase]: 3945/5774 cut-off events. [2024-06-20 16:32:51,972 INFO L125 PetriNetUnfolderBase]: For 132803/132820 co-relation queries the response was YES. [2024-06-20 16:32:51,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40930 conditions, 5774 events. 3945/5774 cut-off events. For 132803/132820 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 29485 event pairs, 961 based on Foata normal form. 18/5790 useless extension candidates. Maximal degree in co-relation 40859. Up to 5429 conditions per place. [2024-06-20 16:32:52,019 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 251 selfloop transitions, 52 changer transitions 0/306 dead transitions. [2024-06-20 16:32:52,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 306 transitions, 4593 flow [2024-06-20 16:32:52,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:32:52,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:32:52,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 16:32:52,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-20 16:32:52,021 INFO L175 Difference]: Start difference. First operand has 149 places, 265 transitions, 3667 flow. Second operand 9 states and 161 transitions. [2024-06-20 16:32:52,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 306 transitions, 4593 flow [2024-06-20 16:32:52,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 306 transitions, 4495 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-20 16:32:52,225 INFO L231 Difference]: Finished difference. Result has 154 places, 272 transitions, 3823 flow [2024-06-20 16:32:52,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3569, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3823, PETRI_PLACES=154, PETRI_TRANSITIONS=272} [2024-06-20 16:32:52,226 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2024-06-20 16:32:52,226 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 272 transitions, 3823 flow [2024-06-20 16:32:52,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:52,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:52,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:52,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 16:32:52,226 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)] === [2024-06-20 16:32:52,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:52,227 INFO L85 PathProgramCache]: Analyzing trace with hash 715998622, now seen corresponding path program 1 times [2024-06-20 16:32:52,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:52,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604564767] [2024-06-20 16:32:52,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:52,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:52,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:52,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:52,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:52,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604564767] [2024-06-20 16:32:52,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604564767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:52,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:52,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:32:52,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86565577] [2024-06-20 16:32:52,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:52,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:32:52,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:52,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:32:52,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:32:52,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:32:52,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 272 transitions, 3823 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:52,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:52,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:32:52,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:54,248 INFO L124 PetriNetUnfolderBase]: 4209/6138 cut-off events. [2024-06-20 16:32:54,248 INFO L125 PetriNetUnfolderBase]: For 153046/153057 co-relation queries the response was YES. [2024-06-20 16:32:54,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43706 conditions, 6138 events. 4209/6138 cut-off events. For 153046/153057 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 31603 event pairs, 821 based on Foata normal form. 20/6155 useless extension candidates. Maximal degree in co-relation 43633. Up to 4031 conditions per place. [2024-06-20 16:32:54,303 INFO L140 encePairwiseOnDemand]: 22/40 looper letters, 267 selfloop transitions, 115 changer transitions 0/385 dead transitions. [2024-06-20 16:32:54,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 385 transitions, 5768 flow [2024-06-20 16:32:54,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:32:54,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:32:54,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 230 transitions. [2024-06-20 16:32:54,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2024-06-20 16:32:54,305 INFO L175 Difference]: Start difference. First operand has 154 places, 272 transitions, 3823 flow. Second operand 11 states and 230 transitions. [2024-06-20 16:32:54,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 385 transitions, 5768 flow [2024-06-20 16:32:54,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 385 transitions, 5641 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-20 16:32:54,542 INFO L231 Difference]: Finished difference. Result has 164 places, 295 transitions, 4262 flow [2024-06-20 16:32:54,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3696, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4262, PETRI_PLACES=164, PETRI_TRANSITIONS=295} [2024-06-20 16:32:54,543 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 123 predicate places. [2024-06-20 16:32:54,543 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 295 transitions, 4262 flow [2024-06-20 16:32:54,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:54,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:54,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:54,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 16:32:54,544 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)] === [2024-06-20 16:32:54,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:54,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1743787998, now seen corresponding path program 2 times [2024-06-20 16:32:54,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:54,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871772218] [2024-06-20 16:32:54,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:54,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:54,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:55,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:55,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:55,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871772218] [2024-06-20 16:32:55,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871772218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:55,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:55,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:32:55,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361078973] [2024-06-20 16:32:55,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:55,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:32:55,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:55,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:32:55,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:32:55,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:32:55,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 295 transitions, 4262 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:55,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:55,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:32:55,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:56,449 INFO L124 PetriNetUnfolderBase]: 4217/6153 cut-off events. [2024-06-20 16:32:56,449 INFO L125 PetriNetUnfolderBase]: For 170952/170969 co-relation queries the response was YES. [2024-06-20 16:32:56,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48602 conditions, 6153 events. 4217/6153 cut-off events. For 170952/170969 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 31548 event pairs, 1009 based on Foata normal form. 18/6169 useless extension candidates. Maximal degree in co-relation 48523. Up to 5882 conditions per place. [2024-06-20 16:32:56,510 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 276 selfloop transitions, 52 changer transitions 0/331 dead transitions. [2024-06-20 16:32:56,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 331 transitions, 5074 flow [2024-06-20 16:32:56,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:32:56,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:32:56,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-20 16:32:56,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325 [2024-06-20 16:32:56,511 INFO L175 Difference]: Start difference. First operand has 164 places, 295 transitions, 4262 flow. Second operand 10 states and 173 transitions. [2024-06-20 16:32:56,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 331 transitions, 5074 flow [2024-06-20 16:32:56,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 331 transitions, 4907 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-20 16:32:56,913 INFO L231 Difference]: Finished difference. Result has 170 places, 297 transitions, 4253 flow [2024-06-20 16:32:56,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4095, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4253, PETRI_PLACES=170, PETRI_TRANSITIONS=297} [2024-06-20 16:32:56,915 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 129 predicate places. [2024-06-20 16:32:56,915 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 297 transitions, 4253 flow [2024-06-20 16:32:56,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:56,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:56,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:56,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 16:32:56,916 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)] === [2024-06-20 16:32:56,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:56,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1380389244, now seen corresponding path program 3 times [2024-06-20 16:32:56,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:56,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358262426] [2024-06-20 16:32:56,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:56,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:56,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:57,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:57,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:57,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358262426] [2024-06-20 16:32:57,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358262426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:57,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:57,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:32:57,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574667436] [2024-06-20 16:32:57,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:57,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:32:57,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:57,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:32:57,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:32:57,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:32:57,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 297 transitions, 4253 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:57,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:57,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:32:57,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:32:58,600 INFO L124 PetriNetUnfolderBase]: 4334/6351 cut-off events. [2024-06-20 16:32:58,600 INFO L125 PetriNetUnfolderBase]: For 180464/180495 co-relation queries the response was YES. [2024-06-20 16:32:58,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49829 conditions, 6351 events. 4334/6351 cut-off events. For 180464/180495 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 33028 event pairs, 898 based on Foata normal form. 30/6379 useless extension candidates. Maximal degree in co-relation 49747. Up to 5723 conditions per place. [2024-06-20 16:32:58,654 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 255 selfloop transitions, 88 changer transitions 0/346 dead transitions. [2024-06-20 16:32:58,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 346 transitions, 5485 flow [2024-06-20 16:32:58,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:32:58,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:32:58,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 16:32:58,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-20 16:32:58,656 INFO L175 Difference]: Start difference. First operand has 170 places, 297 transitions, 4253 flow. Second operand 8 states and 144 transitions. [2024-06-20 16:32:58,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 346 transitions, 5485 flow [2024-06-20 16:32:58,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 346 transitions, 5315 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-20 16:32:58,928 INFO L231 Difference]: Finished difference. Result has 172 places, 316 transitions, 4624 flow [2024-06-20 16:32:58,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4117, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4624, PETRI_PLACES=172, PETRI_TRANSITIONS=316} [2024-06-20 16:32:58,928 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 131 predicate places. [2024-06-20 16:32:58,928 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 316 transitions, 4624 flow [2024-06-20 16:32:58,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:58,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:32:58,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:32:58,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 16:32:58,929 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)] === [2024-06-20 16:32:58,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:32:58,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1582409426, now seen corresponding path program 4 times [2024-06-20 16:32:58,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:32:58,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109547281] [2024-06-20 16:32:58,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:32:58,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:32:58,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:32:59,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:32:59,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:32:59,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109547281] [2024-06-20 16:32:59,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109547281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:32:59,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:32:59,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:32:59,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511069075] [2024-06-20 16:32:59,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:32:59,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:32:59,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:32:59,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:32:59,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:32:59,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:32:59,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 316 transitions, 4624 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:32:59,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:32:59,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:32:59,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:00,747 INFO L124 PetriNetUnfolderBase]: 4454/6547 cut-off events. [2024-06-20 16:33:00,747 INFO L125 PetriNetUnfolderBase]: For 200887/200924 co-relation queries the response was YES. [2024-06-20 16:33:00,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52484 conditions, 6547 events. 4454/6547 cut-off events. For 200887/200924 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 34500 event pairs, 1046 based on Foata normal form. 36/6581 useless extension candidates. Maximal degree in co-relation 52399. Up to 5952 conditions per place. [2024-06-20 16:33:00,803 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 262 selfloop transitions, 95 changer transitions 0/360 dead transitions. [2024-06-20 16:33:00,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 360 transitions, 5939 flow [2024-06-20 16:33:00,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:33:00,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:33:00,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 16:33:00,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45625 [2024-06-20 16:33:00,804 INFO L175 Difference]: Start difference. First operand has 172 places, 316 transitions, 4624 flow. Second operand 8 states and 146 transitions. [2024-06-20 16:33:00,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 360 transitions, 5939 flow [2024-06-20 16:33:01,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 360 transitions, 5612 flow, removed 131 selfloop flow, removed 4 redundant places. [2024-06-20 16:33:01,137 INFO L231 Difference]: Finished difference. Result has 177 places, 331 transitions, 4961 flow [2024-06-20 16:33:01,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4449, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4961, PETRI_PLACES=177, PETRI_TRANSITIONS=331} [2024-06-20 16:33:01,138 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 136 predicate places. [2024-06-20 16:33:01,138 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 331 transitions, 4961 flow [2024-06-20 16:33:01,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:01,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:01,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:01,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 16:33:01,139 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)] === [2024-06-20 16:33:01,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:01,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1616633550, now seen corresponding path program 2 times [2024-06-20 16:33:01,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:01,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083579684] [2024-06-20 16:33:01,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:01,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:01,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:01,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:01,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:01,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083579684] [2024-06-20 16:33:01,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083579684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:01,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:01,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:33:01,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962106004] [2024-06-20 16:33:01,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:01,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:33:01,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:01,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:33:01,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:33:01,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:33:01,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 331 transitions, 4961 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:01,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:01,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:33:01,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:02,923 INFO L124 PetriNetUnfolderBase]: 4680/6865 cut-off events. [2024-06-20 16:33:02,923 INFO L125 PetriNetUnfolderBase]: For 213777/213814 co-relation queries the response was YES. [2024-06-20 16:33:02,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55188 conditions, 6865 events. 4680/6865 cut-off events. For 213777/213814 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 36517 event pairs, 759 based on Foata normal form. 38/6900 useless extension candidates. Maximal degree in co-relation 55101. Up to 5028 conditions per place. [2024-06-20 16:33:02,987 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 375 selfloop transitions, 117 changer transitions 0/495 dead transitions. [2024-06-20 16:33:02,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 495 transitions, 8345 flow [2024-06-20 16:33:02,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:33:02,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:33:02,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-20 16:33:02,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51875 [2024-06-20 16:33:02,989 INFO L175 Difference]: Start difference. First operand has 177 places, 331 transitions, 4961 flow. Second operand 8 states and 166 transitions. [2024-06-20 16:33:02,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 495 transitions, 8345 flow [2024-06-20 16:33:03,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 495 transitions, 8183 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-20 16:33:03,383 INFO L231 Difference]: Finished difference. Result has 184 places, 397 transitions, 6183 flow [2024-06-20 16:33:03,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4811, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6183, PETRI_PLACES=184, PETRI_TRANSITIONS=397} [2024-06-20 16:33:03,383 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 143 predicate places. [2024-06-20 16:33:03,383 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 397 transitions, 6183 flow [2024-06-20 16:33:03,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:03,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:03,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:03,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 16:33:03,384 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)] === [2024-06-20 16:33:03,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:03,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1582469876, now seen corresponding path program 5 times [2024-06-20 16:33:03,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:03,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387621278] [2024-06-20 16:33:03,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:03,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:03,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:03,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:03,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:03,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387621278] [2024-06-20 16:33:03,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387621278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:03,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:03,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:33:03,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723420882] [2024-06-20 16:33:03,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:03,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:33:03,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:03,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:33:03,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:33:03,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:33:03,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 397 transitions, 6183 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:03,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:03,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:33:03,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:05,381 INFO L124 PetriNetUnfolderBase]: 4683/6874 cut-off events. [2024-06-20 16:33:05,382 INFO L125 PetriNetUnfolderBase]: For 219910/219955 co-relation queries the response was YES. [2024-06-20 16:33:05,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57806 conditions, 6874 events. 4683/6874 cut-off events. For 219910/219955 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 36394 event pairs, 1046 based on Foata normal form. 44/6916 useless extension candidates. Maximal degree in co-relation 57714. Up to 6481 conditions per place. [2024-06-20 16:33:05,458 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 345 selfloop transitions, 76 changer transitions 0/424 dead transitions. [2024-06-20 16:33:05,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 424 transitions, 7173 flow [2024-06-20 16:33:05,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:33:05,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:33:05,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 16:33:05,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-20 16:33:05,459 INFO L175 Difference]: Start difference. First operand has 184 places, 397 transitions, 6183 flow. Second operand 8 states and 144 transitions. [2024-06-20 16:33:05,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 424 transitions, 7173 flow [2024-06-20 16:33:05,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 424 transitions, 7097 flow, removed 37 selfloop flow, removed 1 redundant places. [2024-06-20 16:33:05,913 INFO L231 Difference]: Finished difference. Result has 191 places, 399 transitions, 6338 flow [2024-06-20 16:33:05,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6113, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6338, PETRI_PLACES=191, PETRI_TRANSITIONS=399} [2024-06-20 16:33:05,913 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 150 predicate places. [2024-06-20 16:33:05,913 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 399 transitions, 6338 flow [2024-06-20 16:33:05,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:05,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:05,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:05,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 16:33:05,914 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:33:05,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:05,914 INFO L85 PathProgramCache]: Analyzing trace with hash 703087314, now seen corresponding path program 3 times [2024-06-20 16:33:05,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:05,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404398090] [2024-06-20 16:33:05,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:05,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:05,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:06,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:06,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:06,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404398090] [2024-06-20 16:33:06,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404398090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:06,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:06,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:33:06,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300181789] [2024-06-20 16:33:06,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:06,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:33:06,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:06,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:33:06,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:33:06,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:33:06,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 399 transitions, 6338 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:06,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:06,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:33:06,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:08,237 INFO L124 PetriNetUnfolderBase]: 4882/7155 cut-off events. [2024-06-20 16:33:08,237 INFO L125 PetriNetUnfolderBase]: For 240969/240982 co-relation queries the response was YES. [2024-06-20 16:33:08,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60719 conditions, 7155 events. 4882/7155 cut-off events. For 240969/240982 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 38388 event pairs, 926 based on Foata normal form. 22/7174 useless extension candidates. Maximal degree in co-relation 60624. Up to 5311 conditions per place. [2024-06-20 16:33:08,315 INFO L140 encePairwiseOnDemand]: 22/40 looper letters, 371 selfloop transitions, 133 changer transitions 0/507 dead transitions. [2024-06-20 16:33:08,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 507 transitions, 8743 flow [2024-06-20 16:33:08,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:33:08,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:33:08,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-20 16:33:08,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5225 [2024-06-20 16:33:08,317 INFO L175 Difference]: Start difference. First operand has 191 places, 399 transitions, 6338 flow. Second operand 10 states and 209 transitions. [2024-06-20 16:33:08,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 507 transitions, 8743 flow [2024-06-20 16:33:08,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 507 transitions, 8524 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-20 16:33:08,785 INFO L231 Difference]: Finished difference. Result has 196 places, 418 transitions, 6743 flow [2024-06-20 16:33:08,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6129, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6743, PETRI_PLACES=196, PETRI_TRANSITIONS=418} [2024-06-20 16:33:08,785 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 155 predicate places. [2024-06-20 16:33:08,785 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 418 transitions, 6743 flow [2024-06-20 16:33:08,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:08,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:08,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:08,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 16:33:08,786 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)] === [2024-06-20 16:33:08,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:08,787 INFO L85 PathProgramCache]: Analyzing trace with hash -809356140, now seen corresponding path program 1 times [2024-06-20 16:33:08,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:08,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274657258] [2024-06-20 16:33:08,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:08,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:08,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:09,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:09,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:09,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274657258] [2024-06-20 16:33:09,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274657258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:09,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:09,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:33:09,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325318868] [2024-06-20 16:33:09,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:09,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:33:09,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:09,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:33:09,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:33:09,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:33:09,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 418 transitions, 6743 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:09,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:09,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:33:09,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:11,266 INFO L124 PetriNetUnfolderBase]: 5145/7556 cut-off events. [2024-06-20 16:33:11,267 INFO L125 PetriNetUnfolderBase]: For 280378/280397 co-relation queries the response was YES. [2024-06-20 16:33:11,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65049 conditions, 7556 events. 5145/7556 cut-off events. For 280378/280397 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 40824 event pairs, 1006 based on Foata normal form. 54/7607 useless extension candidates. Maximal degree in co-relation 64952. Up to 5475 conditions per place. [2024-06-20 16:33:11,348 INFO L140 encePairwiseOnDemand]: 23/40 looper letters, 365 selfloop transitions, 153 changer transitions 0/521 dead transitions. [2024-06-20 16:33:11,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 521 transitions, 9047 flow [2024-06-20 16:33:11,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:33:11,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:33:11,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-20 16:33:11,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-20 16:33:11,349 INFO L175 Difference]: Start difference. First operand has 196 places, 418 transitions, 6743 flow. Second operand 9 states and 189 transitions. [2024-06-20 16:33:11,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 521 transitions, 9047 flow [2024-06-20 16:33:11,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 521 transitions, 8828 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-20 16:33:11,890 INFO L231 Difference]: Finished difference. Result has 201 places, 445 transitions, 7360 flow [2024-06-20 16:33:11,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6524, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7360, PETRI_PLACES=201, PETRI_TRANSITIONS=445} [2024-06-20 16:33:11,891 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 160 predicate places. [2024-06-20 16:33:11,891 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 445 transitions, 7360 flow [2024-06-20 16:33:11,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:11,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:11,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:11,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 16:33:11,892 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)] === [2024-06-20 16:33:11,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:11,892 INFO L85 PathProgramCache]: Analyzing trace with hash 709578714, now seen corresponding path program 4 times [2024-06-20 16:33:11,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:11,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047005712] [2024-06-20 16:33:11,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:11,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:11,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:12,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:12,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:12,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047005712] [2024-06-20 16:33:12,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047005712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:12,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:12,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:33:12,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383144708] [2024-06-20 16:33:12,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:12,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:33:12,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:12,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:33:12,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:33:12,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:33:12,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 445 transitions, 7360 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:12,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:12,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:33:12,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:14,396 INFO L124 PetriNetUnfolderBase]: 5197/7629 cut-off events. [2024-06-20 16:33:14,396 INFO L125 PetriNetUnfolderBase]: For 287244/287263 co-relation queries the response was YES. [2024-06-20 16:33:14,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68885 conditions, 7629 events. 5197/7629 cut-off events. For 287244/287263 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 41414 event pairs, 827 based on Foata normal form. 28/7654 useless extension candidates. Maximal degree in co-relation 68784. Up to 5973 conditions per place. [2024-06-20 16:33:14,485 INFO L140 encePairwiseOnDemand]: 23/40 looper letters, 402 selfloop transitions, 120 changer transitions 0/525 dead transitions. [2024-06-20 16:33:14,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 525 transitions, 9359 flow [2024-06-20 16:33:14,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:33:14,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:33:14,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-20 16:33:14,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5055555555555555 [2024-06-20 16:33:14,487 INFO L175 Difference]: Start difference. First operand has 201 places, 445 transitions, 7360 flow. Second operand 9 states and 182 transitions. [2024-06-20 16:33:14,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 525 transitions, 9359 flow [2024-06-20 16:33:15,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 525 transitions, 9250 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-20 16:33:15,086 INFO L231 Difference]: Finished difference. Result has 206 places, 452 transitions, 7644 flow [2024-06-20 16:33:15,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7251, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7644, PETRI_PLACES=206, PETRI_TRANSITIONS=452} [2024-06-20 16:33:15,086 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 165 predicate places. [2024-06-20 16:33:15,086 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 452 transitions, 7644 flow [2024-06-20 16:33:15,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:15,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:15,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:15,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 16:33:15,087 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:33:15,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:15,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1386999242, now seen corresponding path program 1 times [2024-06-20 16:33:15,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:15,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500172756] [2024-06-20 16:33:15,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:15,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:15,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:15,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:15,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:15,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500172756] [2024-06-20 16:33:15,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500172756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:15,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:15,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:33:15,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364218203] [2024-06-20 16:33:15,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:15,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:33:15,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:15,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:33:15,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:33:15,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:33:15,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 452 transitions, 7644 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:15,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:15,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:33:15,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:16,954 INFO L124 PetriNetUnfolderBase]: 5188/7617 cut-off events. [2024-06-20 16:33:16,954 INFO L125 PetriNetUnfolderBase]: For 296830/296832 co-relation queries the response was YES. [2024-06-20 16:33:17,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69779 conditions, 7617 events. 5188/7617 cut-off events. For 296830/296832 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 41188 event pairs, 1551 based on Foata normal form. 5/7621 useless extension candidates. Maximal degree in co-relation 69676. Up to 7501 conditions per place. [2024-06-20 16:33:17,038 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 452 selfloop transitions, 22 changer transitions 0/477 dead transitions. [2024-06-20 16:33:17,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 477 transitions, 8852 flow [2024-06-20 16:33:17,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:33:17,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:33:17,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-20 16:33:17,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43214285714285716 [2024-06-20 16:33:17,039 INFO L175 Difference]: Start difference. First operand has 206 places, 452 transitions, 7644 flow. Second operand 7 states and 121 transitions. [2024-06-20 16:33:17,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 477 transitions, 8852 flow [2024-06-20 16:33:17,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 477 transitions, 8554 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-20 16:33:17,654 INFO L231 Difference]: Finished difference. Result has 207 places, 457 transitions, 7532 flow [2024-06-20 16:33:17,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7352, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7532, PETRI_PLACES=207, PETRI_TRANSITIONS=457} [2024-06-20 16:33:17,655 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 166 predicate places. [2024-06-20 16:33:17,655 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 457 transitions, 7532 flow [2024-06-20 16:33:17,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:17,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:17,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:17,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 16:33:17,656 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)] === [2024-06-20 16:33:17,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:17,656 INFO L85 PathProgramCache]: Analyzing trace with hash 947748412, now seen corresponding path program 6 times [2024-06-20 16:33:17,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:17,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142688389] [2024-06-20 16:33:17,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:17,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:17,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:18,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:18,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:18,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142688389] [2024-06-20 16:33:18,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142688389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:18,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:18,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:33:18,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132071896] [2024-06-20 16:33:18,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:18,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:33:18,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:18,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:33:18,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:33:18,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:33:18,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 457 transitions, 7532 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:18,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:18,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:33:18,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:19,805 INFO L124 PetriNetUnfolderBase]: 5216/7669 cut-off events. [2024-06-20 16:33:19,805 INFO L125 PetriNetUnfolderBase]: For 309251/309292 co-relation queries the response was YES. [2024-06-20 16:33:19,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69344 conditions, 7669 events. 5216/7669 cut-off events. For 309251/309292 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 41694 event pairs, 1138 based on Foata normal form. 40/7707 useless extension candidates. Maximal degree in co-relation 69239. Up to 6875 conditions per place. [2024-06-20 16:33:19,892 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 372 selfloop transitions, 117 changer transitions 0/492 dead transitions. [2024-06-20 16:33:19,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 492 transitions, 8850 flow [2024-06-20 16:33:19,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:33:19,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:33:19,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 16:33:19,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-20 16:33:19,894 INFO L175 Difference]: Start difference. First operand has 207 places, 457 transitions, 7532 flow. Second operand 8 states and 144 transitions. [2024-06-20 16:33:19,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 492 transitions, 8850 flow [2024-06-20 16:33:20,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 492 transitions, 8774 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-20 16:33:20,564 INFO L231 Difference]: Finished difference. Result has 212 places, 461 transitions, 7822 flow [2024-06-20 16:33:20,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7456, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7822, PETRI_PLACES=212, PETRI_TRANSITIONS=461} [2024-06-20 16:33:20,565 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 171 predicate places. [2024-06-20 16:33:20,565 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 461 transitions, 7822 flow [2024-06-20 16:33:20,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:20,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:20,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:20,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 16:33:20,566 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)] === [2024-06-20 16:33:20,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:20,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1897590678, now seen corresponding path program 5 times [2024-06-20 16:33:20,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:20,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164494800] [2024-06-20 16:33:20,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:20,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:20,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:21,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:21,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:21,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164494800] [2024-06-20 16:33:21,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164494800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:21,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:21,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:33:21,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768433027] [2024-06-20 16:33:21,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:21,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:33:21,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:21,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:33:21,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:33:21,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:33:21,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 461 transitions, 7822 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:21,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:21,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:33:21,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:22,856 INFO L124 PetriNetUnfolderBase]: 5388/7908 cut-off events. [2024-06-20 16:33:22,856 INFO L125 PetriNetUnfolderBase]: For 334981/335016 co-relation queries the response was YES. [2024-06-20 16:33:22,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72394 conditions, 7908 events. 5388/7908 cut-off events. For 334981/335016 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 43160 event pairs, 940 based on Foata normal form. 38/7943 useless extension candidates. Maximal degree in co-relation 72288. Up to 5882 conditions per place. [2024-06-20 16:33:22,954 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 380 selfloop transitions, 182 changer transitions 0/565 dead transitions. [2024-06-20 16:33:22,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 565 transitions, 10699 flow [2024-06-20 16:33:22,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:33:22,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:33:22,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-20 16:33:22,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503125 [2024-06-20 16:33:22,956 INFO L175 Difference]: Start difference. First operand has 212 places, 461 transitions, 7822 flow. Second operand 8 states and 161 transitions. [2024-06-20 16:33:22,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 565 transitions, 10699 flow [2024-06-20 16:33:23,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 565 transitions, 10425 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-20 16:33:23,653 INFO L231 Difference]: Finished difference. Result has 217 places, 502 transitions, 8869 flow [2024-06-20 16:33:23,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7572, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8869, PETRI_PLACES=217, PETRI_TRANSITIONS=502} [2024-06-20 16:33:23,654 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 176 predicate places. [2024-06-20 16:33:23,654 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 502 transitions, 8869 flow [2024-06-20 16:33:23,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:23,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:23,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:23,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 16:33:23,654 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)] === [2024-06-20 16:33:23,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:23,655 INFO L85 PathProgramCache]: Analyzing trace with hash 947808862, now seen corresponding path program 7 times [2024-06-20 16:33:23,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:23,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251557208] [2024-06-20 16:33:23,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:23,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:23,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:24,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:24,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:24,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251557208] [2024-06-20 16:33:24,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251557208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:24,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:24,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:33:24,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095301991] [2024-06-20 16:33:24,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:24,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:33:24,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:24,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:33:24,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:33:24,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:33:24,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 502 transitions, 8869 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:24,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:24,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:33:24,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:25,938 INFO L124 PetriNetUnfolderBase]: 5455/8028 cut-off events. [2024-06-20 16:33:25,938 INFO L125 PetriNetUnfolderBase]: For 331280/331305 co-relation queries the response was YES. [2024-06-20 16:33:26,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75482 conditions, 8028 events. 5455/8028 cut-off events. For 331280/331305 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 44057 event pairs, 1341 based on Foata normal form. 30/8056 useless extension candidates. Maximal degree in co-relation 75373. Up to 7573 conditions per place. [2024-06-20 16:33:26,047 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 453 selfloop transitions, 84 changer transitions 0/540 dead transitions. [2024-06-20 16:33:26,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 540 transitions, 10285 flow [2024-06-20 16:33:26,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:33:26,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:33:26,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 16:33:26,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-20 16:33:26,049 INFO L175 Difference]: Start difference. First operand has 217 places, 502 transitions, 8869 flow. Second operand 8 states and 141 transitions. [2024-06-20 16:33:26,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 540 transitions, 10285 flow [2024-06-20 16:33:26,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 540 transitions, 10017 flow, removed 68 selfloop flow, removed 3 redundant places. [2024-06-20 16:33:26,862 INFO L231 Difference]: Finished difference. Result has 222 places, 512 transitions, 9043 flow [2024-06-20 16:33:26,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8601, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9043, PETRI_PLACES=222, PETRI_TRANSITIONS=512} [2024-06-20 16:33:26,863 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 181 predicate places. [2024-06-20 16:33:26,863 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 512 transitions, 9043 flow [2024-06-20 16:33:26,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:26,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:26,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:26,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 16:33:26,864 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)] === [2024-06-20 16:33:26,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:26,864 INFO L85 PathProgramCache]: Analyzing trace with hash 2018443974, now seen corresponding path program 6 times [2024-06-20 16:33:26,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:26,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166351483] [2024-06-20 16:33:26,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:26,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:26,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:27,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:27,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:27,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166351483] [2024-06-20 16:33:27,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166351483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:27,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:27,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:33:27,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013436594] [2024-06-20 16:33:27,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:27,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:33:27,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:27,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:33:27,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:33:27,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:33:27,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 512 transitions, 9043 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:27,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:27,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:33:27,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:29,204 INFO L124 PetriNetUnfolderBase]: 5653/8308 cut-off events. [2024-06-20 16:33:29,204 INFO L125 PetriNetUnfolderBase]: For 353594/353613 co-relation queries the response was YES. [2024-06-20 16:33:29,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76687 conditions, 8308 events. 5653/8308 cut-off events. For 353594/353613 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 45676 event pairs, 1130 based on Foata normal form. 38/8343 useless extension candidates. Maximal degree in co-relation 76577. Up to 5898 conditions per place. [2024-06-20 16:33:29,305 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 367 selfloop transitions, 212 changer transitions 0/582 dead transitions. [2024-06-20 16:33:29,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 582 transitions, 11066 flow [2024-06-20 16:33:29,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:33:29,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:33:29,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-20 16:33:29,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50625 [2024-06-20 16:33:29,306 INFO L175 Difference]: Start difference. First operand has 222 places, 512 transitions, 9043 flow. Second operand 8 states and 162 transitions. [2024-06-20 16:33:29,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 582 transitions, 11066 flow [2024-06-20 16:33:30,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 582 transitions, 10814 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-20 16:33:30,179 INFO L231 Difference]: Finished difference. Result has 224 places, 534 transitions, 9591 flow [2024-06-20 16:33:30,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8791, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9591, PETRI_PLACES=224, PETRI_TRANSITIONS=534} [2024-06-20 16:33:30,180 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 183 predicate places. [2024-06-20 16:33:30,180 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 534 transitions, 9591 flow [2024-06-20 16:33:30,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:30,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:30,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:30,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 16:33:30,180 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:33:30,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:30,181 INFO L85 PathProgramCache]: Analyzing trace with hash 2018439324, now seen corresponding path program 7 times [2024-06-20 16:33:30,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:30,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865456228] [2024-06-20 16:33:30,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:30,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:30,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:30,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:30,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:30,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865456228] [2024-06-20 16:33:30,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865456228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:30,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:30,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:33:30,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377132446] [2024-06-20 16:33:30,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:30,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:33:30,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:30,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:33:30,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:33:31,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:33:31,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 534 transitions, 9591 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:31,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:31,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:33:31,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:33,024 INFO L124 PetriNetUnfolderBase]: 6013/8820 cut-off events. [2024-06-20 16:33:33,025 INFO L125 PetriNetUnfolderBase]: For 399983/400002 co-relation queries the response was YES. [2024-06-20 16:33:33,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83748 conditions, 8820 events. 6013/8820 cut-off events. For 399983/400002 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 48763 event pairs, 1133 based on Foata normal form. 40/8857 useless extension candidates. Maximal degree in co-relation 83637. Up to 5977 conditions per place. [2024-06-20 16:33:33,110 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 358 selfloop transitions, 267 changer transitions 0/628 dead transitions. [2024-06-20 16:33:33,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 628 transitions, 12126 flow [2024-06-20 16:33:33,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:33:33,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:33:33,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-20 16:33:33,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5083333333333333 [2024-06-20 16:33:33,112 INFO L175 Difference]: Start difference. First operand has 224 places, 534 transitions, 9591 flow. Second operand 9 states and 183 transitions. [2024-06-20 16:33:33,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 628 transitions, 12126 flow [2024-06-20 16:33:33,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 628 transitions, 11684 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-20 16:33:33,950 INFO L231 Difference]: Finished difference. Result has 229 places, 572 transitions, 10437 flow [2024-06-20 16:33:33,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9149, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10437, PETRI_PLACES=229, PETRI_TRANSITIONS=572} [2024-06-20 16:33:33,951 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 188 predicate places. [2024-06-20 16:33:33,952 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 572 transitions, 10437 flow [2024-06-20 16:33:33,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:33,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:33,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:33,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 16:33:33,957 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:33:33,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:33,957 INFO L85 PathProgramCache]: Analyzing trace with hash 950605372, now seen corresponding path program 8 times [2024-06-20 16:33:33,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:33,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536174500] [2024-06-20 16:33:33,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:33,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:33,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:34,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:34,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:34,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536174500] [2024-06-20 16:33:34,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536174500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:34,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:34,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:33:34,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316329769] [2024-06-20 16:33:34,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:34,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:33:34,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:34,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:33:34,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:33:34,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:33:34,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 572 transitions, 10437 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:34,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:34,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:33:34,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:36,665 INFO L124 PetriNetUnfolderBase]: 5990/8785 cut-off events. [2024-06-20 16:33:36,665 INFO L125 PetriNetUnfolderBase]: For 411880/411905 co-relation queries the response was YES. [2024-06-20 16:33:36,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84929 conditions, 8785 events. 5990/8785 cut-off events. For 411880/411905 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 48612 event pairs, 1529 based on Foata normal form. 32/8815 useless extension candidates. Maximal degree in co-relation 84816. Up to 8445 conditions per place. [2024-06-20 16:33:36,771 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 533 selfloop transitions, 63 changer transitions 0/599 dead transitions. [2024-06-20 16:33:36,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 599 transitions, 11762 flow [2024-06-20 16:33:36,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:33:36,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:33:36,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 16:33:36,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-20 16:33:36,772 INFO L175 Difference]: Start difference. First operand has 229 places, 572 transitions, 10437 flow. Second operand 8 states and 138 transitions. [2024-06-20 16:33:36,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 599 transitions, 11762 flow [2024-06-20 16:33:37,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 599 transitions, 11302 flow, removed 131 selfloop flow, removed 4 redundant places. [2024-06-20 16:33:37,908 INFO L231 Difference]: Finished difference. Result has 233 places, 572 transitions, 10123 flow [2024-06-20 16:33:37,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9977, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10123, PETRI_PLACES=233, PETRI_TRANSITIONS=572} [2024-06-20 16:33:37,909 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 192 predicate places. [2024-06-20 16:33:37,910 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 572 transitions, 10123 flow [2024-06-20 16:33:37,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:37,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:37,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:37,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 16:33:37,910 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:33:37,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:37,911 INFO L85 PathProgramCache]: Analyzing trace with hash 2133730494, now seen corresponding path program 8 times [2024-06-20 16:33:37,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:37,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423821504] [2024-06-20 16:33:37,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:37,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:37,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:38,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:38,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:38,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423821504] [2024-06-20 16:33:38,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423821504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:38,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:38,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:33:38,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637751048] [2024-06-20 16:33:38,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:38,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:33:38,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:38,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:33:38,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:33:38,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:33:38,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 572 transitions, 10123 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:38,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:38,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:33:38,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:40,769 INFO L124 PetriNetUnfolderBase]: 6244/9128 cut-off events. [2024-06-20 16:33:40,769 INFO L125 PetriNetUnfolderBase]: For 429548/429573 co-relation queries the response was YES. [2024-06-20 16:33:40,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87996 conditions, 9128 events. 6244/9128 cut-off events. For 429548/429573 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 50561 event pairs, 1120 based on Foata normal form. 42/9167 useless extension candidates. Maximal degree in co-relation 87881. Up to 6091 conditions per place. [2024-06-20 16:33:40,896 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 393 selfloop transitions, 268 changer transitions 0/664 dead transitions. [2024-06-20 16:33:40,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 664 transitions, 12858 flow [2024-06-20 16:33:40,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:33:40,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:33:40,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-20 16:33:40,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-20 16:33:40,898 INFO L175 Difference]: Start difference. First operand has 233 places, 572 transitions, 10123 flow. Second operand 9 states and 190 transitions. [2024-06-20 16:33:40,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 664 transitions, 12858 flow [2024-06-20 16:33:41,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 664 transitions, 12657 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-20 16:33:41,816 INFO L231 Difference]: Finished difference. Result has 236 places, 599 transitions, 11121 flow [2024-06-20 16:33:41,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9922, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11121, PETRI_PLACES=236, PETRI_TRANSITIONS=599} [2024-06-20 16:33:41,817 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 195 predicate places. [2024-06-20 16:33:41,817 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 599 transitions, 11121 flow [2024-06-20 16:33:41,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:41,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:41,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:41,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 16:33:41,818 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)] === [2024-06-20 16:33:41,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:41,818 INFO L85 PathProgramCache]: Analyzing trace with hash 2133915068, now seen corresponding path program 2 times [2024-06-20 16:33:41,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:41,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465808972] [2024-06-20 16:33:41,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:41,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:41,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:42,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:42,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:42,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465808972] [2024-06-20 16:33:42,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465808972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:42,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:42,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:33:42,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859528950] [2024-06-20 16:33:42,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:42,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:33:42,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:42,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:33:42,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:33:42,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:33:42,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 599 transitions, 11121 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:42,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:42,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:33:42,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:44,862 INFO L124 PetriNetUnfolderBase]: 6420/9425 cut-off events. [2024-06-20 16:33:44,863 INFO L125 PetriNetUnfolderBase]: For 484134/484153 co-relation queries the response was YES. [2024-06-20 16:33:44,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93480 conditions, 9425 events. 6420/9425 cut-off events. For 484134/484153 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 52724 event pairs, 1191 based on Foata normal form. 54/9476 useless extension candidates. Maximal degree in co-relation 93363. Up to 6737 conditions per place. [2024-06-20 16:33:44,963 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 455 selfloop transitions, 196 changer transitions 0/654 dead transitions. [2024-06-20 16:33:44,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 654 transitions, 13147 flow [2024-06-20 16:33:44,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:33:44,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:33:44,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-20 16:33:44,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515625 [2024-06-20 16:33:44,968 INFO L175 Difference]: Start difference. First operand has 236 places, 599 transitions, 11121 flow. Second operand 8 states and 165 transitions. [2024-06-20 16:33:44,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 654 transitions, 13147 flow [2024-06-20 16:33:46,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 654 transitions, 12658 flow, removed 121 selfloop flow, removed 5 redundant places. [2024-06-20 16:33:46,018 INFO L231 Difference]: Finished difference. Result has 239 places, 602 transitions, 11147 flow [2024-06-20 16:33:46,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10640, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11147, PETRI_PLACES=239, PETRI_TRANSITIONS=602} [2024-06-20 16:33:46,018 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 198 predicate places. [2024-06-20 16:33:46,019 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 602 transitions, 11147 flow [2024-06-20 16:33:46,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:46,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:46,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:46,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 16:33:46,019 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:33:46,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:46,020 INFO L85 PathProgramCache]: Analyzing trace with hash 2133908124, now seen corresponding path program 9 times [2024-06-20 16:33:46,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:46,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323792784] [2024-06-20 16:33:46,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:46,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:46,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:46,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:46,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:46,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323792784] [2024-06-20 16:33:46,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323792784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:46,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:46,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:33:46,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175588789] [2024-06-20 16:33:46,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:46,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:33:46,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:46,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:33:46,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:33:46,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:33:46,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 602 transitions, 11147 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:46,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:46,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:33:46,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:48,869 INFO L124 PetriNetUnfolderBase]: 6526/9575 cut-off events. [2024-06-20 16:33:48,870 INFO L125 PetriNetUnfolderBase]: For 470832/470851 co-relation queries the response was YES. [2024-06-20 16:33:48,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95426 conditions, 9575 events. 6526/9575 cut-off events. For 470832/470851 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 53646 event pairs, 1046 based on Foata normal form. 34/9606 useless extension candidates. Maximal degree in co-relation 95307. Up to 7193 conditions per place. [2024-06-20 16:33:48,992 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 451 selfloop transitions, 209 changer transitions 0/663 dead transitions. [2024-06-20 16:33:48,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 663 transitions, 13261 flow [2024-06-20 16:33:48,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:33:48,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:33:48,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-20 16:33:48,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.496875 [2024-06-20 16:33:48,993 INFO L175 Difference]: Start difference. First operand has 239 places, 602 transitions, 11147 flow. Second operand 8 states and 159 transitions. [2024-06-20 16:33:48,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 663 transitions, 13261 flow [2024-06-20 16:33:50,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 663 transitions, 12808 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-20 16:33:50,085 INFO L231 Difference]: Finished difference. Result has 241 places, 615 transitions, 11445 flow [2024-06-20 16:33:50,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10700, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11445, PETRI_PLACES=241, PETRI_TRANSITIONS=615} [2024-06-20 16:33:50,086 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 200 predicate places. [2024-06-20 16:33:50,086 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 615 transitions, 11445 flow [2024-06-20 16:33:50,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:50,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:50,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:50,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 16:33:50,087 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:33:50,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:50,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1785328624, now seen corresponding path program 2 times [2024-06-20 16:33:50,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:50,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723794210] [2024-06-20 16:33:50,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:50,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:50,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:50,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:50,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723794210] [2024-06-20 16:33:50,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723794210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:50,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:50,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:33:50,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59259113] [2024-06-20 16:33:50,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:50,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:33:50,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:50,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:33:50,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:33:50,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:33:50,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 615 transitions, 11445 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:50,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:50,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:33:50,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:52,794 INFO L124 PetriNetUnfolderBase]: 6541/9588 cut-off events. [2024-06-20 16:33:52,795 INFO L125 PetriNetUnfolderBase]: For 459067/459069 co-relation queries the response was YES. [2024-06-20 16:33:52,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95244 conditions, 9588 events. 6541/9588 cut-off events. For 459067/459069 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 53748 event pairs, 1895 based on Foata normal form. 5/9592 useless extension candidates. Maximal degree in co-relation 95124. Up to 9444 conditions per place. [2024-06-20 16:33:52,920 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 607 selfloop transitions, 28 changer transitions 0/638 dead transitions. [2024-06-20 16:33:52,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 638 transitions, 12981 flow [2024-06-20 16:33:52,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:33:52,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:33:52,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-20 16:33:52,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44583333333333336 [2024-06-20 16:33:52,921 INFO L175 Difference]: Start difference. First operand has 241 places, 615 transitions, 11445 flow. Second operand 6 states and 107 transitions. [2024-06-20 16:33:52,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 638 transitions, 12981 flow [2024-06-20 16:33:54,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 638 transitions, 12483 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-20 16:33:54,049 INFO L231 Difference]: Finished difference. Result has 241 places, 620 transitions, 11112 flow [2024-06-20 16:33:54,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10949, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11112, PETRI_PLACES=241, PETRI_TRANSITIONS=620} [2024-06-20 16:33:54,050 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 200 predicate places. [2024-06-20 16:33:54,050 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 620 transitions, 11112 flow [2024-06-20 16:33:54,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:54,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:54,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:54,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 16:33:54,050 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)] === [2024-06-20 16:33:54,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:54,051 INFO L85 PathProgramCache]: Analyzing trace with hash -281318730, now seen corresponding path program 3 times [2024-06-20 16:33:54,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:54,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384330134] [2024-06-20 16:33:54,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:54,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:54,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:54,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:54,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:54,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384330134] [2024-06-20 16:33:54,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384330134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:54,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:54,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:33:54,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230648404] [2024-06-20 16:33:54,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:54,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:33:54,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:54,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:33:54,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:33:54,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:33:54,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 620 transitions, 11112 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:54,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:54,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:33:54,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:33:56,999 INFO L124 PetriNetUnfolderBase]: 6629/9738 cut-off events. [2024-06-20 16:33:57,000 INFO L125 PetriNetUnfolderBase]: For 475373/475373 co-relation queries the response was YES. [2024-06-20 16:33:57,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94550 conditions, 9738 events. 6629/9738 cut-off events. For 475373/475373 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 54887 event pairs, 2055 based on Foata normal form. 18/9755 useless extension candidates. Maximal degree in co-relation 94429. Up to 9437 conditions per place. [2024-06-20 16:33:57,136 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 627 selfloop transitions, 28 changer transitions 0/658 dead transitions. [2024-06-20 16:33:57,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 658 transitions, 12824 flow [2024-06-20 16:33:57,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:33:57,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:33:57,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 16:33:57,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45625 [2024-06-20 16:33:57,138 INFO L175 Difference]: Start difference. First operand has 241 places, 620 transitions, 11112 flow. Second operand 8 states and 146 transitions. [2024-06-20 16:33:57,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 658 transitions, 12824 flow [2024-06-20 16:33:58,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 658 transitions, 12489 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-20 16:33:58,142 INFO L231 Difference]: Finished difference. Result has 243 places, 622 transitions, 10928 flow [2024-06-20 16:33:58,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10779, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10928, PETRI_PLACES=243, PETRI_TRANSITIONS=622} [2024-06-20 16:33:58,143 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 202 predicate places. [2024-06-20 16:33:58,143 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 622 transitions, 10928 flow [2024-06-20 16:33:58,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:58,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:33:58,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:33:58,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 16:33:58,144 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)] === [2024-06-20 16:33:58,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:33:58,144 INFO L85 PathProgramCache]: Analyzing trace with hash -272747850, now seen corresponding path program 4 times [2024-06-20 16:33:58,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:33:58,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299371147] [2024-06-20 16:33:58,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:33:58,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:33:58,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:33:58,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:33:58,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:33:58,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299371147] [2024-06-20 16:33:58,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299371147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:33:58,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:33:58,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:33:58,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313584903] [2024-06-20 16:33:58,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:33:58,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:33:58,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:33:58,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:33:58,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:33:59,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:33:59,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 622 transitions, 10928 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:33:59,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:33:59,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:33:59,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:01,196 INFO L124 PetriNetUnfolderBase]: 6766/9955 cut-off events. [2024-06-20 16:34:01,196 INFO L125 PetriNetUnfolderBase]: For 469586/469586 co-relation queries the response was YES. [2024-06-20 16:34:01,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95953 conditions, 9955 events. 6766/9955 cut-off events. For 469586/469586 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 56650 event pairs, 2077 based on Foata normal form. 18/9972 useless extension candidates. Maximal degree in co-relation 95832. Up to 9507 conditions per place. [2024-06-20 16:34:01,333 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 629 selfloop transitions, 38 changer transitions 0/670 dead transitions. [2024-06-20 16:34:01,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 670 transitions, 12730 flow [2024-06-20 16:34:01,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:34:01,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:34:01,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-20 16:34:01,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2024-06-20 16:34:01,339 INFO L175 Difference]: Start difference. First operand has 243 places, 622 transitions, 10928 flow. Second operand 8 states and 156 transitions. [2024-06-20 16:34:01,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 670 transitions, 12730 flow [2024-06-20 16:34:02,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 670 transitions, 12624 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-20 16:34:02,537 INFO L231 Difference]: Finished difference. Result has 247 places, 628 transitions, 11045 flow [2024-06-20 16:34:02,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10822, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11045, PETRI_PLACES=247, PETRI_TRANSITIONS=628} [2024-06-20 16:34:02,537 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 206 predicate places. [2024-06-20 16:34:02,538 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 628 transitions, 11045 flow [2024-06-20 16:34:02,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:02,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:02,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:02,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 16:34:02,538 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)] === [2024-06-20 16:34:02,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:02,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1503100560, now seen corresponding path program 5 times [2024-06-20 16:34:02,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:02,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057698689] [2024-06-20 16:34:02,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:02,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:02,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:03,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:03,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:03,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057698689] [2024-06-20 16:34:03,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057698689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:03,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:03,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:03,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202609044] [2024-06-20 16:34:03,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:03,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:03,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:03,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:03,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:03,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:34:03,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 628 transitions, 11045 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:03,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:03,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:34:03,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:05,942 INFO L124 PetriNetUnfolderBase]: 6854/10096 cut-off events. [2024-06-20 16:34:05,942 INFO L125 PetriNetUnfolderBase]: For 496440/496440 co-relation queries the response was YES. [2024-06-20 16:34:06,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98751 conditions, 10096 events. 6854/10096 cut-off events. For 496440/496440 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 57611 event pairs, 2103 based on Foata normal form. 18/10113 useless extension candidates. Maximal degree in co-relation 98628. Up to 9542 conditions per place. [2024-06-20 16:34:06,070 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 626 selfloop transitions, 50 changer transitions 0/679 dead transitions. [2024-06-20 16:34:06,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 679 transitions, 12950 flow [2024-06-20 16:34:06,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:34:06,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:34:06,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-20 16:34:06,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48125 [2024-06-20 16:34:06,092 INFO L175 Difference]: Start difference. First operand has 247 places, 628 transitions, 11045 flow. Second operand 8 states and 154 transitions. [2024-06-20 16:34:06,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 679 transitions, 12950 flow [2024-06-20 16:34:06,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 679 transitions, 12797 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-20 16:34:06,964 INFO L231 Difference]: Finished difference. Result has 250 places, 630 transitions, 11100 flow [2024-06-20 16:34:06,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10892, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11100, PETRI_PLACES=250, PETRI_TRANSITIONS=630} [2024-06-20 16:34:06,965 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 209 predicate places. [2024-06-20 16:34:06,965 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 630 transitions, 11100 flow [2024-06-20 16:34:06,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:06,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:06,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:06,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 16:34:06,966 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)] === [2024-06-20 16:34:06,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:06,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1274968770, now seen corresponding path program 6 times [2024-06-20 16:34:06,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:06,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142244181] [2024-06-20 16:34:06,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:06,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:06,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:07,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:07,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:07,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142244181] [2024-06-20 16:34:07,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142244181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:07,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:07,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:34:07,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723274600] [2024-06-20 16:34:07,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:07,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:34:07,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:07,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:34:07,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:34:07,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:34:07,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 630 transitions, 11100 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:07,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:07,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:34:07,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:10,275 INFO L124 PetriNetUnfolderBase]: 6917/10197 cut-off events. [2024-06-20 16:34:10,275 INFO L125 PetriNetUnfolderBase]: For 512455/512455 co-relation queries the response was YES. [2024-06-20 16:34:10,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99656 conditions, 10197 events. 6917/10197 cut-off events. For 512455/512455 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 58249 event pairs, 2066 based on Foata normal form. 18/10214 useless extension candidates. Maximal degree in co-relation 99532. Up to 9623 conditions per place. [2024-06-20 16:34:10,407 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 621 selfloop transitions, 54 changer transitions 0/678 dead transitions. [2024-06-20 16:34:10,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 678 transitions, 13107 flow [2024-06-20 16:34:10,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:34:10,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:34:10,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-20 16:34:10,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.471875 [2024-06-20 16:34:10,408 INFO L175 Difference]: Start difference. First operand has 250 places, 630 transitions, 11100 flow. Second operand 8 states and 151 transitions. [2024-06-20 16:34:10,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 678 transitions, 13107 flow [2024-06-20 16:34:11,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 678 transitions, 12935 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-20 16:34:11,373 INFO L231 Difference]: Finished difference. Result has 252 places, 632 transitions, 11148 flow [2024-06-20 16:34:11,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10936, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11148, PETRI_PLACES=252, PETRI_TRANSITIONS=632} [2024-06-20 16:34:11,374 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 211 predicate places. [2024-06-20 16:34:11,374 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 632 transitions, 11148 flow [2024-06-20 16:34:11,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:11,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:11,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:11,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 16:34:11,374 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)] === [2024-06-20 16:34:11,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:11,375 INFO L85 PathProgramCache]: Analyzing trace with hash -281325674, now seen corresponding path program 10 times [2024-06-20 16:34:11,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:11,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377064841] [2024-06-20 16:34:11,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:11,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:11,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:12,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:12,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:12,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377064841] [2024-06-20 16:34:12,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377064841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:12,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:12,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:34:12,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676433820] [2024-06-20 16:34:12,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:12,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:34:12,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:12,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:34:12,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:34:12,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:34:12,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 632 transitions, 11148 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:12,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:12,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:34:12,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:14,539 INFO L124 PetriNetUnfolderBase]: 7001/10317 cut-off events. [2024-06-20 16:34:14,539 INFO L125 PetriNetUnfolderBase]: For 506152/506161 co-relation queries the response was YES. [2024-06-20 16:34:14,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99531 conditions, 10317 events. 7001/10317 cut-off events. For 506152/506161 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 59052 event pairs, 2102 based on Foata normal form. 30/10345 useless extension candidates. Maximal degree in co-relation 99406. Up to 9841 conditions per place. [2024-06-20 16:34:14,675 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 633 selfloop transitions, 68 changer transitions 0/704 dead transitions. [2024-06-20 16:34:14,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 704 transitions, 13487 flow [2024-06-20 16:34:14,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:34:14,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:34:14,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-20 16:34:14,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.471875 [2024-06-20 16:34:14,677 INFO L175 Difference]: Start difference. First operand has 252 places, 632 transitions, 11148 flow. Second operand 8 states and 151 transitions. [2024-06-20 16:34:14,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 704 transitions, 13487 flow [2024-06-20 16:34:15,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 704 transitions, 13315 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-20 16:34:15,721 INFO L231 Difference]: Finished difference. Result has 257 places, 660 transitions, 11744 flow [2024-06-20 16:34:15,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10976, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11744, PETRI_PLACES=257, PETRI_TRANSITIONS=660} [2024-06-20 16:34:15,721 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 216 predicate places. [2024-06-20 16:34:15,721 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 660 transitions, 11744 flow [2024-06-20 16:34:15,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:15,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:15,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:15,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 16:34:15,722 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:34:15,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:15,722 INFO L85 PathProgramCache]: Analyzing trace with hash -346941634, now seen corresponding path program 1 times [2024-06-20 16:34:15,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:15,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977165920] [2024-06-20 16:34:15,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:15,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:15,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:16,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:16,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:16,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977165920] [2024-06-20 16:34:16,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977165920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:16,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:16,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:34:16,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793524410] [2024-06-20 16:34:16,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:16,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:34:16,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:16,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:34:16,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:34:16,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:34:16,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 660 transitions, 11744 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:16,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:16,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:34:16,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:19,296 INFO L124 PetriNetUnfolderBase]: 7021/10349 cut-off events. [2024-06-20 16:34:19,297 INFO L125 PetriNetUnfolderBase]: For 525338/525347 co-relation queries the response was YES. [2024-06-20 16:34:19,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100892 conditions, 10349 events. 7021/10349 cut-off events. For 525338/525347 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 59377 event pairs, 2089 based on Foata normal form. 13/10360 useless extension candidates. Maximal degree in co-relation 100763. Up to 9849 conditions per place. [2024-06-20 16:34:19,729 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 637 selfloop transitions, 73 changer transitions 0/713 dead transitions. [2024-06-20 16:34:19,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 713 transitions, 13823 flow [2024-06-20 16:34:19,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:34:19,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:34:19,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-20 16:34:19,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-20 16:34:19,745 INFO L175 Difference]: Start difference. First operand has 257 places, 660 transitions, 11744 flow. Second operand 7 states and 135 transitions. [2024-06-20 16:34:19,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 713 transitions, 13823 flow [2024-06-20 16:34:20,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 713 transitions, 13609 flow, removed 98 selfloop flow, removed 2 redundant places. [2024-06-20 16:34:20,924 INFO L231 Difference]: Finished difference. Result has 262 places, 667 transitions, 11886 flow [2024-06-20 16:34:20,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11530, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11886, PETRI_PLACES=262, PETRI_TRANSITIONS=667} [2024-06-20 16:34:20,925 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 221 predicate places. [2024-06-20 16:34:20,925 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 667 transitions, 11886 flow [2024-06-20 16:34:20,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:20,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:20,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:20,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 16:34:20,926 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:34:20,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:20,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1245172786, now seen corresponding path program 3 times [2024-06-20 16:34:20,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:20,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501133976] [2024-06-20 16:34:20,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:20,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:20,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:21,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:21,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:21,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501133976] [2024-06-20 16:34:21,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501133976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:21,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:21,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:34:21,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271075567] [2024-06-20 16:34:21,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:21,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:34:21,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:21,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:34:21,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:34:21,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:34:21,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 667 transitions, 11886 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:21,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:21,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:34:21,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:24,023 INFO L124 PetriNetUnfolderBase]: 7012/10335 cut-off events. [2024-06-20 16:34:24,023 INFO L125 PetriNetUnfolderBase]: For 528136/528136 co-relation queries the response was YES. [2024-06-20 16:34:24,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101164 conditions, 10335 events. 7012/10335 cut-off events. For 528136/528136 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 59195 event pairs, 2165 based on Foata normal form. 3/10337 useless extension candidates. Maximal degree in co-relation 101033. Up to 10226 conditions per place. [2024-06-20 16:34:24,143 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 660 selfloop transitions, 14 changer transitions 0/677 dead transitions. [2024-06-20 16:34:24,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 677 transitions, 13289 flow [2024-06-20 16:34:24,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:34:24,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:34:24,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-20 16:34:24,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 16:34:24,144 INFO L175 Difference]: Start difference. First operand has 262 places, 667 transitions, 11886 flow. Second operand 6 states and 96 transitions. [2024-06-20 16:34:24,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 677 transitions, 13289 flow [2024-06-20 16:34:25,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 677 transitions, 13063 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-20 16:34:25,180 INFO L231 Difference]: Finished difference. Result has 263 places, 667 transitions, 11696 flow [2024-06-20 16:34:25,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11660, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=653, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11696, PETRI_PLACES=263, PETRI_TRANSITIONS=667} [2024-06-20 16:34:25,181 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 222 predicate places. [2024-06-20 16:34:25,181 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 667 transitions, 11696 flow [2024-06-20 16:34:25,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:25,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:25,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:25,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 16:34:25,181 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:34:25,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:25,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1780006606, now seen corresponding path program 1 times [2024-06-20 16:34:25,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:25,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811877411] [2024-06-20 16:34:25,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:25,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:25,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:25,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:25,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:25,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811877411] [2024-06-20 16:34:25,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811877411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:25,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:25,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:34:25,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167633916] [2024-06-20 16:34:25,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:25,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:34:25,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:25,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:34:25,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:34:25,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:34:25,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 667 transitions, 11696 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:25,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:25,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:34:25,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:28,264 INFO L124 PetriNetUnfolderBase]: 7009/10332 cut-off events. [2024-06-20 16:34:28,264 INFO L125 PetriNetUnfolderBase]: For 539009/539009 co-relation queries the response was YES. [2024-06-20 16:34:28,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100736 conditions, 10332 events. 7009/10332 cut-off events. For 539009/539009 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 59205 event pairs, 2167 based on Foata normal form. 9/10340 useless extension candidates. Maximal degree in co-relation 100604. Up to 10106 conditions per place. [2024-06-20 16:34:28,386 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 655 selfloop transitions, 36 changer transitions 0/694 dead transitions. [2024-06-20 16:34:28,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 694 transitions, 13419 flow [2024-06-20 16:34:28,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:34:28,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:34:28,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-20 16:34:28,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-20 16:34:28,388 INFO L175 Difference]: Start difference. First operand has 263 places, 667 transitions, 11696 flow. Second operand 6 states and 110 transitions. [2024-06-20 16:34:28,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 694 transitions, 13419 flow [2024-06-20 16:34:29,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 694 transitions, 13350 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 16:34:29,435 INFO L231 Difference]: Finished difference. Result has 263 places, 674 transitions, 11845 flow [2024-06-20 16:34:29,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11630, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11845, PETRI_PLACES=263, PETRI_TRANSITIONS=674} [2024-06-20 16:34:29,436 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 222 predicate places. [2024-06-20 16:34:29,436 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 674 transitions, 11845 flow [2024-06-20 16:34:29,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:29,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:29,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:29,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 16:34:29,437 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:34:29,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:29,437 INFO L85 PathProgramCache]: Analyzing trace with hash -2136359550, now seen corresponding path program 2 times [2024-06-20 16:34:29,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:29,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405708840] [2024-06-20 16:34:29,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:29,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:29,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:29,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:29,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:29,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405708840] [2024-06-20 16:34:29,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405708840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:29,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:29,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:34:29,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024977428] [2024-06-20 16:34:29,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:29,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:34:29,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:29,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:34:29,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:34:29,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:34:29,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 674 transitions, 11845 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:29,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:29,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:34:29,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:32,645 INFO L124 PetriNetUnfolderBase]: 6823/10035 cut-off events. [2024-06-20 16:34:32,645 INFO L125 PetriNetUnfolderBase]: For 543210/543213 co-relation queries the response was YES. [2024-06-20 16:34:32,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98948 conditions, 10035 events. 6823/10035 cut-off events. For 543210/543213 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 56994 event pairs, 2133 based on Foata normal form. 3/10035 useless extension candidates. Maximal degree in co-relation 98816. Up to 9822 conditions per place. [2024-06-20 16:34:32,762 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 647 selfloop transitions, 39 changer transitions 0/689 dead transitions. [2024-06-20 16:34:32,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 689 transitions, 13320 flow [2024-06-20 16:34:32,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:34:32,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:34:32,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-20 16:34:32,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44583333333333336 [2024-06-20 16:34:32,781 INFO L175 Difference]: Start difference. First operand has 263 places, 674 transitions, 11845 flow. Second operand 6 states and 107 transitions. [2024-06-20 16:34:32,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 689 transitions, 13320 flow [2024-06-20 16:34:33,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 689 transitions, 13226 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-20 16:34:33,758 INFO L231 Difference]: Finished difference. Result has 266 places, 674 transitions, 11842 flow [2024-06-20 16:34:33,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11753, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11842, PETRI_PLACES=266, PETRI_TRANSITIONS=674} [2024-06-20 16:34:33,759 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 225 predicate places. [2024-06-20 16:34:33,759 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 674 transitions, 11842 flow [2024-06-20 16:34:33,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:33,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:33,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:33,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 16:34:33,760 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)] === [2024-06-20 16:34:33,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:33,760 INFO L85 PathProgramCache]: Analyzing trace with hash 157607724, now seen corresponding path program 1 times [2024-06-20 16:34:33,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:33,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011716993] [2024-06-20 16:34:33,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:33,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:33,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:34,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:34,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:34,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011716993] [2024-06-20 16:34:34,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011716993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:34,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:34,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:34:34,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368209735] [2024-06-20 16:34:34,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:34,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:34:34,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:34,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:34:34,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:34:34,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:34:34,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 674 transitions, 11842 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:34,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:34,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:34:34,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:37,540 INFO L124 PetriNetUnfolderBase]: 7399/10943 cut-off events. [2024-06-20 16:34:37,540 INFO L125 PetriNetUnfolderBase]: For 667980/668011 co-relation queries the response was YES. [2024-06-20 16:34:37,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109505 conditions, 10943 events. 7399/10943 cut-off events. For 667980/668011 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 63707 event pairs, 1128 based on Foata normal form. 48/10988 useless extension candidates. Maximal degree in co-relation 109372. Up to 5800 conditions per place. [2024-06-20 16:34:37,677 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 579 selfloop transitions, 205 changer transitions 0/787 dead transitions. [2024-06-20 16:34:37,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 787 transitions, 15462 flow [2024-06-20 16:34:37,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:37,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:37,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-20 16:34:37,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-20 16:34:37,679 INFO L175 Difference]: Start difference. First operand has 266 places, 674 transitions, 11842 flow. Second operand 9 states and 189 transitions. [2024-06-20 16:34:37,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 787 transitions, 15462 flow [2024-06-20 16:34:38,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 787 transitions, 15323 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 16:34:38,761 INFO L231 Difference]: Finished difference. Result has 271 places, 682 transitions, 12488 flow [2024-06-20 16:34:38,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11703, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12488, PETRI_PLACES=271, PETRI_TRANSITIONS=682} [2024-06-20 16:34:38,762 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 230 predicate places. [2024-06-20 16:34:38,762 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 682 transitions, 12488 flow [2024-06-20 16:34:38,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:38,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:38,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:38,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 16:34:38,763 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:34:38,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:38,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1810053278, now seen corresponding path program 2 times [2024-06-20 16:34:38,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:38,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916844393] [2024-06-20 16:34:38,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:38,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:38,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:39,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:39,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:39,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916844393] [2024-06-20 16:34:39,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916844393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:39,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:39,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:34:39,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583559786] [2024-06-20 16:34:39,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:39,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:34:39,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:39,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:34:39,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:34:39,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:34:39,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 682 transitions, 12488 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:39,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:39,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:34:39,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:42,896 INFO L124 PetriNetUnfolderBase]: 8358/12456 cut-off events. [2024-06-20 16:34:42,896 INFO L125 PetriNetUnfolderBase]: For 889348/889379 co-relation queries the response was YES. [2024-06-20 16:34:42,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129977 conditions, 12456 events. 8358/12456 cut-off events. For 889348/889379 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 75748 event pairs, 1619 based on Foata normal form. 64/12517 useless extension candidates. Maximal degree in co-relation 129841. Up to 7708 conditions per place. [2024-06-20 16:34:43,056 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 588 selfloop transitions, 222 changer transitions 0/813 dead transitions. [2024-06-20 16:34:43,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 813 transitions, 16554 flow [2024-06-20 16:34:43,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:43,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:43,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-20 16:34:43,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5222222222222223 [2024-06-20 16:34:43,058 INFO L175 Difference]: Start difference. First operand has 271 places, 682 transitions, 12488 flow. Second operand 9 states and 188 transitions. [2024-06-20 16:34:43,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 813 transitions, 16554 flow [2024-06-20 16:34:45,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 813 transitions, 16123 flow, removed 116 selfloop flow, removed 3 redundant places. [2024-06-20 16:34:45,090 INFO L231 Difference]: Finished difference. Result has 279 places, 696 transitions, 13097 flow [2024-06-20 16:34:45,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12177, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13097, PETRI_PLACES=279, PETRI_TRANSITIONS=696} [2024-06-20 16:34:45,091 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 238 predicate places. [2024-06-20 16:34:45,091 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 696 transitions, 13097 flow [2024-06-20 16:34:45,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:45,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:45,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:45,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 16:34:45,091 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:34:45,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:45,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1423966298, now seen corresponding path program 3 times [2024-06-20 16:34:45,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:45,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146606966] [2024-06-20 16:34:45,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:45,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:45,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:34:45,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:34:45,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:34:45,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146606966] [2024-06-20 16:34:45,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146606966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:34:45,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:34:45,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:34:45,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13865234] [2024-06-20 16:34:45,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:34:45,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:34:45,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:34:45,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:34:45,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:34:45,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-20 16:34:45,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 696 transitions, 13097 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:45,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:34:45,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-20 16:34:45,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:34:49,507 INFO L124 PetriNetUnfolderBase]: 8531/12736 cut-off events. [2024-06-20 16:34:49,508 INFO L125 PetriNetUnfolderBase]: For 937841/937872 co-relation queries the response was YES. [2024-06-20 16:34:49,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134678 conditions, 12736 events. 8531/12736 cut-off events. For 937841/937872 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 78029 event pairs, 1865 based on Foata normal form. 64/12797 useless extension candidates. Maximal degree in co-relation 134538. Up to 10021 conditions per place. [2024-06-20 16:34:49,682 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 559 selfloop transitions, 230 changer transitions 0/792 dead transitions. [2024-06-20 16:34:49,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 792 transitions, 16303 flow [2024-06-20 16:34:49,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:34:49,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:34:49,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-20 16:34:49,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2024-06-20 16:34:49,684 INFO L175 Difference]: Start difference. First operand has 279 places, 696 transitions, 13097 flow. Second operand 9 states and 185 transitions. [2024-06-20 16:34:49,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 792 transitions, 16303 flow [2024-06-20 16:34:52,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 792 transitions, 15970 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-06-20 16:34:52,027 INFO L231 Difference]: Finished difference. Result has 284 places, 699 transitions, 13350 flow [2024-06-20 16:34:52,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12766, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13350, PETRI_PLACES=284, PETRI_TRANSITIONS=699} [2024-06-20 16:34:52,028 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 243 predicate places. [2024-06-20 16:34:52,028 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 699 transitions, 13350 flow [2024-06-20 16:34:52,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:34:52,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:34:52,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:34:52,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 16:34:52,029 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:34:52,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:34:52,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1457931758, now seen corresponding path program 4 times [2024-06-20 16:34:52,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:34:52,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116016653] [2024-06-20 16:34:52,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:34:52,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:34:52,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat