./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix029_power.opt_pso.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix029_power.opt_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix029_power.opt_pso.opt_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix029_power.opt_pso.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 20:15:24,851 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:15:24,927 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:15:24,934 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:15:24,935 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:15:24,965 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:15:24,967 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:15:24,967 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:15:24,968 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:15:24,971 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:15:24,972 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:15:24,972 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:15:24,973 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:15:24,974 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:15:24,975 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:15:24,975 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:15:24,975 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:15:24,976 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:15:24,976 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:15:24,976 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:15:24,976 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:15:24,977 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:15:24,977 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:15:24,978 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:15:24,978 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:15:24,978 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:15:24,978 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:15:24,979 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:15:24,979 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:15:24,980 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:15:24,981 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:15:24,981 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:15:24,981 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:15:24,981 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:15:24,981 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:15:24,982 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:15:24,982 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:15:24,982 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:15:24,982 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:15:24,983 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:15:24,983 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:15:24,983 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:15:24,983 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:15:24,984 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:15:25,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:15:25,259 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:15:25,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:15:25,262 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:15:25,263 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:15:25,264 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix029_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-27 20:15:25,537 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:15:25,538 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:15:25,539 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix029_power.opt_pso.opt_rmo.opt.i [2024-06-27 20:15:26,753 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:15:27,018 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:15:27,018 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix029_power.opt_pso.opt_rmo.opt.i [2024-06-27 20:15:27,041 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1734a1a4d/a1d6320d10b54d8089ae6c99d09e6635/FLAGe23a9f7f6 [2024-06-27 20:15:27,052 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1734a1a4d/a1d6320d10b54d8089ae6c99d09e6635 [2024-06-27 20:15:27,052 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:15:27,053 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:15:27,055 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:15:27,055 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:15:27,059 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:15:27,060 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:15:25" (1/2) ... [2024-06-27 20:15:27,061 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16d3e915 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:15:27, skipping insertion in model container [2024-06-27 20:15:27,061 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:15:25" (1/2) ... [2024-06-27 20:15:27,062 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6fdf236b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:15:27, skipping insertion in model container [2024-06-27 20:15:27,063 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:15:27" (2/2) ... [2024-06-27 20:15:27,063 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16d3e915 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:15:27, skipping insertion in model container [2024-06-27 20:15:27,063 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:15:27" (2/2) ... [2024-06-27 20:15:27,063 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:15:27,223 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:15:27,227 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] (((((((((((((((((((((! multithreaded || y$read_delayed == (_Bool)0) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)) [2024-06-27 20:15:27,227 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] (((((((((((((((((((((! multithreaded || y$read_delayed == (_Bool)0) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)) [2024-06-27 20:15:27,228 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] (((((((((((((((((((((! multithreaded || y$read_delayed == (_Bool)0) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)) [2024-06-27 20:15:27,228 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] (((((((((((((((((((((! multithreaded || y$read_delayed == (_Bool)0) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)) [2024-06-27 20:15:27,228 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:15:27,228 INFO L106 edCorrectnessWitness]: ghost_update [L847-L847] multithreaded = 1; [2024-06-27 20:15:27,296 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:15:27,732 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:15:27,741 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:15:27,872 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:15:27,908 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:15:27,909 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:15:27 WrapperNode [2024-06-27 20:15:27,909 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:15:27,910 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:15:27,910 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:15:27,910 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:15:27,917 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:15:27" (1/1) ... [2024-06-27 20:15:27,932 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:15:27" (1/1) ... [2024-06-27 20:15:27,975 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 157 [2024-06-27 20:15:27,975 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:15:27,976 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:15:27,976 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:15:27,976 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:15:27,987 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:15:27" (1/1) ... [2024-06-27 20:15:27,987 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:15:27" (1/1) ... [2024-06-27 20:15:27,991 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:15:27" (1/1) ... [2024-06-27 20:15:28,009 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 20:15:28,009 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:15:27" (1/1) ... [2024-06-27 20:15:28,013 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:15:27" (1/1) ... [2024-06-27 20:15:28,023 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:15:27" (1/1) ... [2024-06-27 20:15:28,033 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:15:27" (1/1) ... [2024-06-27 20:15:28,035 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:15:27" (1/1) ... [2024-06-27 20:15:28,037 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:15:27" (1/1) ... [2024-06-27 20:15:28,041 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:15:28,041 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:15:28,041 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:15:28,042 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:15:28,042 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:15:27" (1/1) ... [2024-06-27 20:15:28,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:15:28,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:15:28,082 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 20:15:28,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 20:15:28,121 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:15:28,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:15:28,121 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:15:28,121 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:15:28,121 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:15:28,122 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:15:28,122 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:15:28,122 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:15:28,122 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-27 20:15:28,122 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-27 20:15:28,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:15:28,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:15:28,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:15:28,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:15:28,124 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 20:15:28,280 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:15:28,282 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:15:28,739 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:15:28,740 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:15:28,934 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:15:28,934 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:15:28,935 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:15:28 BoogieIcfgContainer [2024-06-27 20:15:28,935 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:15:28,937 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:15:28,937 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:15:28,939 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:15:28,940 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:15:25" (1/4) ... [2024-06-27 20:15:28,943 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bbb2ce4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:15:28, skipping insertion in model container [2024-06-27 20:15:28,943 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:15:27" (2/4) ... [2024-06-27 20:15:28,943 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bbb2ce4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:15:28, skipping insertion in model container [2024-06-27 20:15:28,943 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:15:27" (3/4) ... [2024-06-27 20:15:28,944 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bbb2ce4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:15:28, skipping insertion in model container [2024-06-27 20:15:28,944 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:15:28" (4/4) ... [2024-06-27 20:15:28,945 INFO L112 eAbstractionObserver]: Analyzing ICFG mix029_power.opt_pso.opt_rmo.opt.i [2024-06-27 20:15:28,963 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:15:28,963 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 20:15:28,963 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:15:29,020 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:15:29,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-27 20:15:29,102 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-27 20:15:29,103 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:15:29,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 89 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 20:15:29,105 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-27 20:15:29,109 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-27 20:15:29,125 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:15:29,133 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;@77049156, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:15:29,133 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-27 20:15:29,138 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:15:29,139 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 20:15:29,139 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:15:29,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:29,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:15:29,140 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:15:29,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:29,146 INFO L85 PathProgramCache]: Analyzing trace with hash 389440905, now seen corresponding path program 1 times [2024-06-27 20:15:29,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:29,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868064372] [2024-06-27 20:15:29,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:29,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:29,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:30,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:30,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:30,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868064372] [2024-06-27 20:15:30,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868064372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:30,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:30,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:15:30,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71395270] [2024-06-27 20:15:30,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:30,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:15:30,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:30,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:15:30,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:15:30,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-27 20:15:30,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:30,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:30,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-27 20:15:30,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:31,996 INFO L124 PetriNetUnfolderBase]: 7775/11127 cut-off events. [2024-06-27 20:15:31,996 INFO L125 PetriNetUnfolderBase]: For 170/170 co-relation queries the response was YES. [2024-06-27 20:15:32,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22099 conditions, 11127 events. 7775/11127 cut-off events. For 170/170 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 63774 event pairs, 5733 based on Foata normal form. 1/10783 useless extension candidates. Maximal degree in co-relation 22086. Up to 10609 conditions per place. [2024-06-27 20:15:32,084 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 42 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-06-27 20:15:32,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 227 flow [2024-06-27 20:15:32,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:15:32,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:15:32,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-06-27 20:15:32,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-27 20:15:32,098 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 96 transitions. [2024-06-27 20:15:32,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 227 flow [2024-06-27 20:15:32,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 220 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 20:15:32,107 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-27 20:15:32,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-27 20:15:32,112 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-27 20:15:32,113 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-27 20:15:32,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:32,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:32,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:32,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:15:32,114 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:15:32,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:32,115 INFO L85 PathProgramCache]: Analyzing trace with hash 590575656, now seen corresponding path program 1 times [2024-06-27 20:15:32,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:32,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106093632] [2024-06-27 20:15:32,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:32,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:32,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:32,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:32,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:32,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106093632] [2024-06-27 20:15:32,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106093632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:32,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:32,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:15:32,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13150927] [2024-06-27 20:15:32,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:32,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:15:32,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:32,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:15:32,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:15:32,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-27 20:15:32,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:32,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:32,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-27 20:15:32,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:34,400 INFO L124 PetriNetUnfolderBase]: 9097/12637 cut-off events. [2024-06-27 20:15:34,400 INFO L125 PetriNetUnfolderBase]: For 2438/2438 co-relation queries the response was YES. [2024-06-27 20:15:34,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28720 conditions, 12637 events. 9097/12637 cut-off events. For 2438/2438 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 69920 event pairs, 5837 based on Foata normal form. 4/12637 useless extension candidates. Maximal degree in co-relation 28708. Up to 12338 conditions per place. [2024-06-27 20:15:34,497 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 53 selfloop transitions, 9 changer transitions 0/70 dead transitions. [2024-06-27 20:15:34,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 70 transitions, 321 flow [2024-06-27 20:15:34,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:15:34,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:15:34,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2024-06-27 20:15:34,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5865384615384616 [2024-06-27 20:15:34,502 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 122 transitions. [2024-06-27 20:15:34,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 70 transitions, 321 flow [2024-06-27 20:15:34,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 70 transitions, 316 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:15:34,506 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-27 20:15:34,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-27 20:15:34,507 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-27 20:15:34,508 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-27 20:15:34,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:34,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:34,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:34,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:15:34,511 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:15:34,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:34,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1654027547, now seen corresponding path program 1 times [2024-06-27 20:15:34,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:34,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094029778] [2024-06-27 20:15:34,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:34,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:35,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:35,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:35,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094029778] [2024-06-27 20:15:35,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094029778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:35,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:35,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:15:35,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060740893] [2024-06-27 20:15:35,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:35,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:15:35,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:35,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:15:35,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:15:35,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-27 20:15:35,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 179 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 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) [2024-06-27 20:15:35,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:35,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-27 20:15:35,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:37,491 INFO L124 PetriNetUnfolderBase]: 11555/15928 cut-off events. [2024-06-27 20:15:37,492 INFO L125 PetriNetUnfolderBase]: For 8202/8202 co-relation queries the response was YES. [2024-06-27 20:15:37,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39937 conditions, 15928 events. 11555/15928 cut-off events. For 8202/8202 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 86326 event pairs, 5920 based on Foata normal form. 8/15932 useless extension candidates. Maximal degree in co-relation 39923. Up to 15541 conditions per place. [2024-06-27 20:15:37,611 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 71 selfloop transitions, 16 changer transitions 0/94 dead transitions. [2024-06-27 20:15:37,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 94 transitions, 486 flow [2024-06-27 20:15:37,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:15:37,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:15:37,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-27 20:15:37,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-27 20:15:37,617 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 6 states and 169 transitions. [2024-06-27 20:15:37,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 94 transitions, 486 flow [2024-06-27 20:15:37,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 94 transitions, 458 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 20:15:37,624 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 241 flow [2024-06-27 20:15:37,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-06-27 20:15:37,625 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 6 predicate places. [2024-06-27 20:15:37,625 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 241 flow [2024-06-27 20:15:37,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 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) [2024-06-27 20:15:37,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:37,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:37,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:15:37,626 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:15:37,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:37,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1482349763, now seen corresponding path program 1 times [2024-06-27 20:15:37,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:37,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95255677] [2024-06-27 20:15:37,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:37,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:37,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:38,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:38,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:38,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95255677] [2024-06-27 20:15:38,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95255677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:38,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:38,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:15:38,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227712042] [2024-06-27 20:15:38,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:38,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:15:38,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:38,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:15:38,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:15:38,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-27 20:15:38,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 241 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:38,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:38,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-27 20:15:38,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:40,092 INFO L124 PetriNetUnfolderBase]: 9854/13976 cut-off events. [2024-06-27 20:15:40,092 INFO L125 PetriNetUnfolderBase]: For 13385/13385 co-relation queries the response was YES. [2024-06-27 20:15:40,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38252 conditions, 13976 events. 9854/13976 cut-off events. For 13385/13385 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 78931 event pairs, 5511 based on Foata normal form. 3/13773 useless extension candidates. Maximal degree in co-relation 38235. Up to 13366 conditions per place. [2024-06-27 20:15:40,208 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 60 selfloop transitions, 10 changer transitions 0/77 dead transitions. [2024-06-27 20:15:40,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 77 transitions, 447 flow [2024-06-27 20:15:40,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:15:40,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:15:40,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-27 20:15:40,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46923076923076923 [2024-06-27 20:15:40,210 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 241 flow. Second operand 5 states and 122 transitions. [2024-06-27 20:15:40,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 77 transitions, 447 flow [2024-06-27 20:15:40,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 77 transitions, 409 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 20:15:40,220 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 264 flow [2024-06-27 20:15:40,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=264, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2024-06-27 20:15:40,222 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 8 predicate places. [2024-06-27 20:15:40,222 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 264 flow [2024-06-27 20:15:40,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:40,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:40,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:40,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:15:40,223 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:15:40,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:40,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1315032729, now seen corresponding path program 1 times [2024-06-27 20:15:40,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:40,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672271792] [2024-06-27 20:15:40,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:40,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:40,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:41,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:41,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:41,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672271792] [2024-06-27 20:15:41,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672271792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:41,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:41,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:15:41,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536202636] [2024-06-27 20:15:41,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:41,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:15:41,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:41,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:15:41,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:15:41,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-27 20:15:41,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 264 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:41,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:41,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-27 20:15:41,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:42,907 INFO L124 PetriNetUnfolderBase]: 9836/13952 cut-off events. [2024-06-27 20:15:42,907 INFO L125 PetriNetUnfolderBase]: For 20720/20720 co-relation queries the response was YES. [2024-06-27 20:15:42,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41479 conditions, 13952 events. 9836/13952 cut-off events. For 20720/20720 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 78697 event pairs, 5261 based on Foata normal form. 6/13752 useless extension candidates. Maximal degree in co-relation 41460. Up to 13312 conditions per place. [2024-06-27 20:15:42,985 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 68 selfloop transitions, 14 changer transitions 0/89 dead transitions. [2024-06-27 20:15:42,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 89 transitions, 520 flow [2024-06-27 20:15:42,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:15:42,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:15:42,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-27 20:15:42,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2024-06-27 20:15:42,992 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 264 flow. Second operand 6 states and 146 transitions. [2024-06-27 20:15:42,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 89 transitions, 520 flow [2024-06-27 20:15:42,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 89 transitions, 491 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 20:15:42,998 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 310 flow [2024-06-27 20:15:43,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=310, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2024-06-27 20:15:43,002 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 11 predicate places. [2024-06-27 20:15:43,002 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 310 flow [2024-06-27 20:15:43,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:43,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:43,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:43,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:15:43,003 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:15:43,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:43,004 INFO L85 PathProgramCache]: Analyzing trace with hash -840215710, now seen corresponding path program 1 times [2024-06-27 20:15:43,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:43,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245514252] [2024-06-27 20:15:43,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:43,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:43,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:43,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:43,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:43,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245514252] [2024-06-27 20:15:43,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245514252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:43,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:43,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:15:43,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651645839] [2024-06-27 20:15:43,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:43,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:15:43,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:43,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:15:43,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:15:44,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 20:15:44,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 310 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:44,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:44,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 20:15:44,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:45,720 INFO L124 PetriNetUnfolderBase]: 11550/15932 cut-off events. [2024-06-27 20:15:45,720 INFO L125 PetriNetUnfolderBase]: For 35741/35753 co-relation queries the response was YES. [2024-06-27 20:15:45,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51531 conditions, 15932 events. 11550/15932 cut-off events. For 35741/35753 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 86304 event pairs, 6273 based on Foata normal form. 11/15937 useless extension candidates. Maximal degree in co-relation 51511. Up to 15550 conditions per place. [2024-06-27 20:15:45,814 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 75 selfloop transitions, 21 changer transitions 0/102 dead transitions. [2024-06-27 20:15:45,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 102 transitions, 672 flow [2024-06-27 20:15:45,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:15:45,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:15:45,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 20:15:45,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47435897435897434 [2024-06-27 20:15:45,816 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 310 flow. Second operand 6 states and 148 transitions. [2024-06-27 20:15:45,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 102 transitions, 672 flow [2024-06-27 20:15:45,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 102 transitions, 629 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 20:15:45,823 INFO L231 Difference]: Finished difference. Result has 68 places, 72 transitions, 392 flow [2024-06-27 20:15:45,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=392, PETRI_PLACES=68, PETRI_TRANSITIONS=72} [2024-06-27 20:15:45,824 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 13 predicate places. [2024-06-27 20:15:45,824 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 72 transitions, 392 flow [2024-06-27 20:15:45,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:45,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:45,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:45,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:15:45,825 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:15:45,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:45,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1366837896, now seen corresponding path program 2 times [2024-06-27 20:15:45,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:45,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207997564] [2024-06-27 20:15:45,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:45,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:45,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:46,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:46,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:46,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207997564] [2024-06-27 20:15:46,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207997564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:46,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:46,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:15:46,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296265773] [2024-06-27 20:15:46,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:46,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:15:46,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:46,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:15:46,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:15:46,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 20:15:46,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 72 transitions, 392 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:46,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:46,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 20:15:46,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:48,194 INFO L124 PetriNetUnfolderBase]: 11541/15921 cut-off events. [2024-06-27 20:15:48,195 INFO L125 PetriNetUnfolderBase]: For 49178/49187 co-relation queries the response was YES. [2024-06-27 20:15:48,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55267 conditions, 15921 events. 11541/15921 cut-off events. For 49178/49187 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 86349 event pairs, 6276 based on Foata normal form. 9/15923 useless extension candidates. Maximal degree in co-relation 55246. Up to 15541 conditions per place. [2024-06-27 20:15:48,312 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 69 selfloop transitions, 21 changer transitions 0/96 dead transitions. [2024-06-27 20:15:48,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 96 transitions, 634 flow [2024-06-27 20:15:48,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:15:48,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:15:48,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-27 20:15:48,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4551282051282051 [2024-06-27 20:15:48,315 INFO L175 Difference]: Start difference. First operand has 68 places, 72 transitions, 392 flow. Second operand 6 states and 142 transitions. [2024-06-27 20:15:48,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 96 transitions, 634 flow [2024-06-27 20:15:48,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 96 transitions, 580 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-27 20:15:48,344 INFO L231 Difference]: Finished difference. Result has 72 places, 72 transitions, 391 flow [2024-06-27 20:15:48,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=391, PETRI_PLACES=72, PETRI_TRANSITIONS=72} [2024-06-27 20:15:48,345 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 17 predicate places. [2024-06-27 20:15:48,345 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 72 transitions, 391 flow [2024-06-27 20:15:48,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:48,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:48,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:48,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:15:48,346 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:15:48,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:48,347 INFO L85 PathProgramCache]: Analyzing trace with hash -808566324, now seen corresponding path program 1 times [2024-06-27 20:15:48,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:48,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033675408] [2024-06-27 20:15:48,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:48,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:48,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:49,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:49,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:49,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033675408] [2024-06-27 20:15:49,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033675408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:49,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:49,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:15:49,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158524203] [2024-06-27 20:15:49,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:49,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:15:49,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:49,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:15:49,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:15:49,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 20:15:49,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 72 transitions, 391 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:49,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:49,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 20:15:49,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:51,245 INFO L124 PetriNetUnfolderBase]: 11632/16059 cut-off events. [2024-06-27 20:15:51,246 INFO L125 PetriNetUnfolderBase]: For 55882/55886 co-relation queries the response was YES. [2024-06-27 20:15:51,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56298 conditions, 16059 events. 11632/16059 cut-off events. For 55882/55886 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 87030 event pairs, 6266 based on Foata normal form. 7/16062 useless extension candidates. Maximal degree in co-relation 56275. Up to 15643 conditions per place. [2024-06-27 20:15:51,408 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 93 selfloop transitions, 32 changer transitions 0/131 dead transitions. [2024-06-27 20:15:51,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 131 transitions, 866 flow [2024-06-27 20:15:51,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:15:51,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:15:51,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-27 20:15:51,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45913461538461536 [2024-06-27 20:15:51,410 INFO L175 Difference]: Start difference. First operand has 72 places, 72 transitions, 391 flow. Second operand 8 states and 191 transitions. [2024-06-27 20:15:51,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 131 transitions, 866 flow [2024-06-27 20:15:51,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 131 transitions, 792 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 20:15:51,432 INFO L231 Difference]: Finished difference. Result has 76 places, 91 transitions, 547 flow [2024-06-27 20:15:51,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=547, PETRI_PLACES=76, PETRI_TRANSITIONS=91} [2024-06-27 20:15:51,433 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 21 predicate places. [2024-06-27 20:15:51,433 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 91 transitions, 547 flow [2024-06-27 20:15:51,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:51,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:51,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:51,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:15:51,434 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:15:51,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:51,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1203389628, now seen corresponding path program 2 times [2024-06-27 20:15:51,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:51,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327413628] [2024-06-27 20:15:51,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:51,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:51,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:52,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:52,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:52,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327413628] [2024-06-27 20:15:52,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327413628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:52,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:52,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:15:52,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927204319] [2024-06-27 20:15:52,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:52,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:15:52,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:52,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:15:52,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:15:52,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 20:15:52,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 91 transitions, 547 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:52,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:52,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 20:15:52,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:54,174 INFO L124 PetriNetUnfolderBase]: 11654/16113 cut-off events. [2024-06-27 20:15:54,174 INFO L125 PetriNetUnfolderBase]: For 72332/72340 co-relation queries the response was YES. [2024-06-27 20:15:54,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60621 conditions, 16113 events. 11654/16113 cut-off events. For 72332/72340 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 87410 event pairs, 6120 based on Foata normal form. 11/16120 useless extension candidates. Maximal degree in co-relation 60596. Up to 15650 conditions per place. [2024-06-27 20:15:54,283 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 93 selfloop transitions, 34 changer transitions 0/133 dead transitions. [2024-06-27 20:15:54,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 133 transitions, 975 flow [2024-06-27 20:15:54,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:15:54,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:15:54,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-27 20:15:54,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-27 20:15:54,285 INFO L175 Difference]: Start difference. First operand has 76 places, 91 transitions, 547 flow. Second operand 7 states and 168 transitions. [2024-06-27 20:15:54,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 133 transitions, 975 flow [2024-06-27 20:15:54,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 133 transitions, 913 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 20:15:54,308 INFO L231 Difference]: Finished difference. Result has 80 places, 95 transitions, 624 flow [2024-06-27 20:15:54,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=624, PETRI_PLACES=80, PETRI_TRANSITIONS=95} [2024-06-27 20:15:54,309 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 25 predicate places. [2024-06-27 20:15:54,309 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 95 transitions, 624 flow [2024-06-27 20:15:54,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:54,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:54,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:54,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:15:54,310 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:15:54,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:54,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1203384978, now seen corresponding path program 3 times [2024-06-27 20:15:54,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:54,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861217514] [2024-06-27 20:15:54,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:54,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:54,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:55,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:55,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:55,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861217514] [2024-06-27 20:15:55,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861217514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:55,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:55,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:15:55,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730613953] [2024-06-27 20:15:55,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:55,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:15:55,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:55,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:15:55,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:15:55,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 20:15:55,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 95 transitions, 624 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:55,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:55,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 20:15:55,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:56,944 INFO L124 PetriNetUnfolderBase]: 11676/16150 cut-off events. [2024-06-27 20:15:56,945 INFO L125 PetriNetUnfolderBase]: For 92212/92226 co-relation queries the response was YES. [2024-06-27 20:15:56,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64685 conditions, 16150 events. 11676/16150 cut-off events. For 92212/92226 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 87771 event pairs, 6133 based on Foata normal form. 11/16155 useless extension candidates. Maximal degree in co-relation 64659. Up to 15594 conditions per place. [2024-06-27 20:15:57,053 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 83 selfloop transitions, 50 changer transitions 0/139 dead transitions. [2024-06-27 20:15:57,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 139 transitions, 1162 flow [2024-06-27 20:15:57,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:15:57,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:15:57,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 20:15:57,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725274725274725 [2024-06-27 20:15:57,055 INFO L175 Difference]: Start difference. First operand has 80 places, 95 transitions, 624 flow. Second operand 7 states and 172 transitions. [2024-06-27 20:15:57,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 139 transitions, 1162 flow [2024-06-27 20:15:57,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 139 transitions, 1039 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-27 20:15:57,088 INFO L231 Difference]: Finished difference. Result has 82 places, 103 transitions, 734 flow [2024-06-27 20:15:57,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=734, PETRI_PLACES=82, PETRI_TRANSITIONS=103} [2024-06-27 20:15:57,089 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 27 predicate places. [2024-06-27 20:15:57,089 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 103 transitions, 734 flow [2024-06-27 20:15:57,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:57,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:57,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:57,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:15:57,089 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:15:57,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:57,090 INFO L85 PathProgramCache]: Analyzing trace with hash -176781062, now seen corresponding path program 1 times [2024-06-27 20:15:57,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:57,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860832955] [2024-06-27 20:15:57,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:57,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:57,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:15:57,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:15:57,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:15:57,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860832955] [2024-06-27 20:15:57,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860832955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:15:57,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:15:57,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:15:57,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410985552] [2024-06-27 20:15:57,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:15:57,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:15:57,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:15:57,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:15:57,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:15:58,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 20:15:58,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 103 transitions, 734 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:58,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:15:58,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 20:15:58,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:15:59,765 INFO L124 PetriNetUnfolderBase]: 11720/16215 cut-off events. [2024-06-27 20:15:59,765 INFO L125 PetriNetUnfolderBase]: For 94147/94164 co-relation queries the response was YES. [2024-06-27 20:15:59,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64973 conditions, 16215 events. 11720/16215 cut-off events. For 94147/94164 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 88232 event pairs, 5727 based on Foata normal form. 17/16224 useless extension candidates. Maximal degree in co-relation 64946. Up to 15656 conditions per place. [2024-06-27 20:15:59,866 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 112 selfloop transitions, 35 changer transitions 0/153 dead transitions. [2024-06-27 20:15:59,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 153 transitions, 1304 flow [2024-06-27 20:15:59,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:15:59,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:15:59,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 20:15:59,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-27 20:15:59,867 INFO L175 Difference]: Start difference. First operand has 82 places, 103 transitions, 734 flow. Second operand 7 states and 175 transitions. [2024-06-27 20:15:59,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 153 transitions, 1304 flow [2024-06-27 20:15:59,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 153 transitions, 1239 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-27 20:15:59,903 INFO L231 Difference]: Finished difference. Result has 86 places, 111 transitions, 846 flow [2024-06-27 20:15:59,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=846, PETRI_PLACES=86, PETRI_TRANSITIONS=111} [2024-06-27 20:15:59,903 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 31 predicate places. [2024-06-27 20:15:59,904 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 111 transitions, 846 flow [2024-06-27 20:15:59,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:15:59,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:15:59,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:15:59,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:15:59,905 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:15:59,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:15:59,905 INFO L85 PathProgramCache]: Analyzing trace with hash 577699852, now seen corresponding path program 4 times [2024-06-27 20:15:59,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:15:59,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382344582] [2024-06-27 20:15:59,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:15:59,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:15:59,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:00,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:00,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:00,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382344582] [2024-06-27 20:16:00,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382344582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:00,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:00,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:16:00,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606056897] [2024-06-27 20:16:00,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:00,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:16:00,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:00,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:16:00,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:16:00,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 20:16:00,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 111 transitions, 846 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:00,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:00,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 20:16:00,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:02,676 INFO L124 PetriNetUnfolderBase]: 11711/16197 cut-off events. [2024-06-27 20:16:02,676 INFO L125 PetriNetUnfolderBase]: For 114689/114694 co-relation queries the response was YES. [2024-06-27 20:16:02,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68802 conditions, 16197 events. 11711/16197 cut-off events. For 114689/114694 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 87946 event pairs, 5984 based on Foata normal form. 3/16182 useless extension candidates. Maximal degree in co-relation 68773. Up to 15645 conditions per place. [2024-06-27 20:16:02,774 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 86 selfloop transitions, 50 changer transitions 0/142 dead transitions. [2024-06-27 20:16:02,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 142 transitions, 1216 flow [2024-06-27 20:16:02,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:16:02,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:16:02,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-27 20:16:02,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45604395604395603 [2024-06-27 20:16:02,776 INFO L175 Difference]: Start difference. First operand has 86 places, 111 transitions, 846 flow. Second operand 7 states and 166 transitions. [2024-06-27 20:16:02,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 142 transitions, 1216 flow [2024-06-27 20:16:02,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 142 transitions, 1135 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-27 20:16:02,842 INFO L231 Difference]: Finished difference. Result has 90 places, 111 transitions, 876 flow [2024-06-27 20:16:02,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=765, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=876, PETRI_PLACES=90, PETRI_TRANSITIONS=111} [2024-06-27 20:16:02,843 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 35 predicate places. [2024-06-27 20:16:02,843 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 111 transitions, 876 flow [2024-06-27 20:16:02,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:02,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:02,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:02,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:16:02,844 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:16:02,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:02,845 INFO L85 PathProgramCache]: Analyzing trace with hash -170114822, now seen corresponding path program 2 times [2024-06-27 20:16:02,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:02,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866396557] [2024-06-27 20:16:02,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:02,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:02,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:03,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:03,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:03,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866396557] [2024-06-27 20:16:03,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866396557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:03,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:03,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:16:03,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614520096] [2024-06-27 20:16:03,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:03,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:16:03,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:03,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:16:03,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:16:03,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 20:16:03,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 111 transitions, 876 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:03,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:03,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 20:16:03,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:05,608 INFO L124 PetriNetUnfolderBase]: 11755/16262 cut-off events. [2024-06-27 20:16:05,608 INFO L125 PetriNetUnfolderBase]: For 128454/128475 co-relation queries the response was YES. [2024-06-27 20:16:05,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70459 conditions, 16262 events. 11755/16262 cut-off events. For 128454/128475 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 88437 event pairs, 5713 based on Foata normal form. 20/16272 useless extension candidates. Maximal degree in co-relation 70428. Up to 15682 conditions per place. [2024-06-27 20:16:05,700 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 108 selfloop transitions, 40 changer transitions 0/154 dead transitions. [2024-06-27 20:16:05,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 154 transitions, 1416 flow [2024-06-27 20:16:05,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:16:05,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:16:05,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 20:16:05,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46703296703296704 [2024-06-27 20:16:05,701 INFO L175 Difference]: Start difference. First operand has 90 places, 111 transitions, 876 flow. Second operand 7 states and 170 transitions. [2024-06-27 20:16:05,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 154 transitions, 1416 flow [2024-06-27 20:16:05,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 154 transitions, 1282 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 20:16:05,751 INFO L231 Difference]: Finished difference. Result has 91 places, 115 transitions, 885 flow [2024-06-27 20:16:05,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=885, PETRI_PLACES=91, PETRI_TRANSITIONS=115} [2024-06-27 20:16:05,751 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 36 predicate places. [2024-06-27 20:16:05,752 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 115 transitions, 885 flow [2024-06-27 20:16:05,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:05,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:05,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:05,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:16:05,752 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:16:05,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:05,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1026253272, now seen corresponding path program 3 times [2024-06-27 20:16:05,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:05,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289111172] [2024-06-27 20:16:05,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:05,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:05,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:06,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:06,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:06,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289111172] [2024-06-27 20:16:06,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289111172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:06,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:06,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:16:06,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941073403] [2024-06-27 20:16:06,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:06,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:16:06,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:06,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:16:06,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:16:06,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 20:16:06,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 115 transitions, 885 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:06,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:06,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 20:16:06,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:08,634 INFO L124 PetriNetUnfolderBase]: 11737/16238 cut-off events. [2024-06-27 20:16:08,634 INFO L125 PetriNetUnfolderBase]: For 141572/141593 co-relation queries the response was YES. [2024-06-27 20:16:08,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71531 conditions, 16238 events. 11737/16238 cut-off events. For 141572/141593 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 88184 event pairs, 5710 based on Foata normal form. 20/16248 useless extension candidates. Maximal degree in co-relation 71499. Up to 15667 conditions per place. [2024-06-27 20:16:08,735 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 107 selfloop transitions, 39 changer transitions 0/152 dead transitions. [2024-06-27 20:16:08,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 152 transitions, 1299 flow [2024-06-27 20:16:08,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:16:08,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:16:08,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-27 20:16:08,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 20:16:08,736 INFO L175 Difference]: Start difference. First operand has 91 places, 115 transitions, 885 flow. Second operand 7 states and 169 transitions. [2024-06-27 20:16:08,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 152 transitions, 1299 flow [2024-06-27 20:16:08,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 152 transitions, 1167 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-27 20:16:08,820 INFO L231 Difference]: Finished difference. Result has 94 places, 115 transitions, 842 flow [2024-06-27 20:16:08,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=753, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=842, PETRI_PLACES=94, PETRI_TRANSITIONS=115} [2024-06-27 20:16:08,820 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 39 predicate places. [2024-06-27 20:16:08,821 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 115 transitions, 842 flow [2024-06-27 20:16:08,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:08,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:08,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:08,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:16:08,821 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:16:08,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:08,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1026007194, now seen corresponding path program 1 times [2024-06-27 20:16:08,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:08,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840168851] [2024-06-27 20:16:08,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:08,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:08,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:10,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:10,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:10,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840168851] [2024-06-27 20:16:10,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840168851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:10,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:10,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:10,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487163993] [2024-06-27 20:16:10,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:10,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:10,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:10,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:10,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:10,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-27 20:16:10,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 115 transitions, 842 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:10,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:10,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-27 20:16:10,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:12,339 INFO L124 PetriNetUnfolderBase]: 10030/14025 cut-off events. [2024-06-27 20:16:12,339 INFO L125 PetriNetUnfolderBase]: For 133930/133932 co-relation queries the response was YES. [2024-06-27 20:16:12,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63144 conditions, 14025 events. 10030/14025 cut-off events. For 133930/133932 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 77387 event pairs, 4745 based on Foata normal form. 6/13881 useless extension candidates. Maximal degree in co-relation 63111. Up to 13549 conditions per place. [2024-06-27 20:16:12,429 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 126 selfloop transitions, 19 changer transitions 0/152 dead transitions. [2024-06-27 20:16:12,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 152 transitions, 1291 flow [2024-06-27 20:16:12,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:12,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:12,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-27 20:16:12,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 20:16:12,431 INFO L175 Difference]: Start difference. First operand has 94 places, 115 transitions, 842 flow. Second operand 8 states and 182 transitions. [2024-06-27 20:16:12,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 152 transitions, 1291 flow [2024-06-27 20:16:12,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 152 transitions, 1180 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 20:16:12,507 INFO L231 Difference]: Finished difference. Result has 96 places, 120 transitions, 851 flow [2024-06-27 20:16:12,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=851, PETRI_PLACES=96, PETRI_TRANSITIONS=120} [2024-06-27 20:16:12,508 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 41 predicate places. [2024-06-27 20:16:12,508 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 120 transitions, 851 flow [2024-06-27 20:16:12,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:12,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:12,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:12,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:16:12,509 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:16:12,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:12,509 INFO L85 PathProgramCache]: Analyzing trace with hash 2000730435, now seen corresponding path program 1 times [2024-06-27 20:16:12,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:12,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440405264] [2024-06-27 20:16:12,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:12,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:12,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:13,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:13,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:13,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440405264] [2024-06-27 20:16:13,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440405264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:13,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:13,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:16:13,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036827055] [2024-06-27 20:16:13,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:13,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:16:13,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:13,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:16:13,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:16:13,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-27 20:16:13,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 120 transitions, 851 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:13,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:13,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-27 20:16:13,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:14,700 INFO L124 PetriNetUnfolderBase]: 9426/13786 cut-off events. [2024-06-27 20:16:14,700 INFO L125 PetriNetUnfolderBase]: For 146492/146509 co-relation queries the response was YES. [2024-06-27 20:16:14,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63389 conditions, 13786 events. 9426/13786 cut-off events. For 146492/146509 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 81457 event pairs, 4946 based on Foata normal form. 17/13616 useless extension candidates. Maximal degree in co-relation 63354. Up to 12829 conditions per place. [2024-06-27 20:16:14,816 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 111 selfloop transitions, 11 changer transitions 0/137 dead transitions. [2024-06-27 20:16:14,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 137 transitions, 1177 flow [2024-06-27 20:16:14,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:16:14,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:16:14,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-27 20:16:14,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46923076923076923 [2024-06-27 20:16:14,817 INFO L175 Difference]: Start difference. First operand has 96 places, 120 transitions, 851 flow. Second operand 5 states and 122 transitions. [2024-06-27 20:16:14,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 137 transitions, 1177 flow [2024-06-27 20:16:14,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 137 transitions, 1101 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 20:16:14,898 INFO L231 Difference]: Finished difference. Result has 96 places, 124 transitions, 856 flow [2024-06-27 20:16:14,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=856, PETRI_PLACES=96, PETRI_TRANSITIONS=124} [2024-06-27 20:16:14,899 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 41 predicate places. [2024-06-27 20:16:14,899 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 124 transitions, 856 flow [2024-06-27 20:16:14,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:14,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:14,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:14,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:16:14,900 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:16:14,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:14,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1346054130, now seen corresponding path program 1 times [2024-06-27 20:16:14,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:14,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120760877] [2024-06-27 20:16:14,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:14,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:14,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:15,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:15,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:15,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120760877] [2024-06-27 20:16:15,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120760877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:15,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:15,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:15,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063906385] [2024-06-27 20:16:15,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:15,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:15,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:15,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:15,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:16,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 20:16:16,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 124 transitions, 856 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:16,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:16,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 20:16:16,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:17,819 INFO L124 PetriNetUnfolderBase]: 11759/16279 cut-off events. [2024-06-27 20:16:17,819 INFO L125 PetriNetUnfolderBase]: For 201634/201642 co-relation queries the response was YES. [2024-06-27 20:16:17,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79081 conditions, 16279 events. 11759/16279 cut-off events. For 201634/201642 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 88314 event pairs, 5808 based on Foata normal form. 14/16287 useless extension candidates. Maximal degree in co-relation 79045. Up to 15756 conditions per place. [2024-06-27 20:16:17,939 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 128 selfloop transitions, 39 changer transitions 0/173 dead transitions. [2024-06-27 20:16:17,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 173 transitions, 1398 flow [2024-06-27 20:16:17,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:17,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:17,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-27 20:16:17,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45913461538461536 [2024-06-27 20:16:17,942 INFO L175 Difference]: Start difference. First operand has 96 places, 124 transitions, 856 flow. Second operand 8 states and 191 transitions. [2024-06-27 20:16:17,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 173 transitions, 1398 flow [2024-06-27 20:16:18,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 173 transitions, 1347 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 20:16:18,033 INFO L231 Difference]: Finished difference. Result has 101 places, 128 transitions, 963 flow [2024-06-27 20:16:18,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=963, PETRI_PLACES=101, PETRI_TRANSITIONS=128} [2024-06-27 20:16:18,034 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 46 predicate places. [2024-06-27 20:16:18,034 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 128 transitions, 963 flow [2024-06-27 20:16:18,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:18,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:18,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:18,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:16:18,035 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:16:18,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:18,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1349773200, now seen corresponding path program 2 times [2024-06-27 20:16:18,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:18,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199091847] [2024-06-27 20:16:18,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:18,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:18,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:18,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:18,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:18,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199091847] [2024-06-27 20:16:18,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199091847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:18,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:18,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:18,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796652347] [2024-06-27 20:16:18,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:18,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:18,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:18,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:18,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:19,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 20:16:19,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 128 transitions, 963 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:19,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:19,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 20:16:19,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:21,124 INFO L124 PetriNetUnfolderBase]: 11865/16482 cut-off events. [2024-06-27 20:16:21,124 INFO L125 PetriNetUnfolderBase]: For 231891/231902 co-relation queries the response was YES. [2024-06-27 20:16:21,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84074 conditions, 16482 events. 11865/16482 cut-off events. For 231891/231902 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 89815 event pairs, 5381 based on Foata normal form. 10/16484 useless extension candidates. Maximal degree in co-relation 84037. Up to 15541 conditions per place. [2024-06-27 20:16:21,231 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 109 selfloop transitions, 75 changer transitions 0/190 dead transitions. [2024-06-27 20:16:21,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 190 transitions, 1867 flow [2024-06-27 20:16:21,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:21,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:21,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-27 20:16:21,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4951923076923077 [2024-06-27 20:16:21,232 INFO L175 Difference]: Start difference. First operand has 101 places, 128 transitions, 963 flow. Second operand 8 states and 206 transitions. [2024-06-27 20:16:21,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 190 transitions, 1867 flow [2024-06-27 20:16:21,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 190 transitions, 1743 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 20:16:21,337 INFO L231 Difference]: Finished difference. Result has 103 places, 140 transitions, 1212 flow [2024-06-27 20:16:21,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=839, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1212, PETRI_PLACES=103, PETRI_TRANSITIONS=140} [2024-06-27 20:16:21,338 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 48 predicate places. [2024-06-27 20:16:21,338 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 140 transitions, 1212 flow [2024-06-27 20:16:21,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:21,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:21,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:21,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:16:21,339 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:16:21,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:21,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1187622542, now seen corresponding path program 3 times [2024-06-27 20:16:21,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:21,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213557340] [2024-06-27 20:16:21,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:21,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:21,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:22,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:22,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:22,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213557340] [2024-06-27 20:16:22,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213557340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:22,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:22,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:22,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565092628] [2024-06-27 20:16:22,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:22,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:22,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:22,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:22,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:22,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 20:16:22,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 140 transitions, 1212 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:22,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:22,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 20:16:22,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:24,595 INFO L124 PetriNetUnfolderBase]: 11847/16458 cut-off events. [2024-06-27 20:16:24,595 INFO L125 PetriNetUnfolderBase]: For 265826/265837 co-relation queries the response was YES. [2024-06-27 20:16:24,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87660 conditions, 16458 events. 11847/16458 cut-off events. For 265826/265837 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 89720 event pairs, 5381 based on Foata normal form. 10/16460 useless extension candidates. Maximal degree in co-relation 87622. Up to 15526 conditions per place. [2024-06-27 20:16:24,693 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 103 selfloop transitions, 77 changer transitions 0/186 dead transitions. [2024-06-27 20:16:24,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 186 transitions, 1808 flow [2024-06-27 20:16:24,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:24,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:24,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-27 20:16:24,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4831730769230769 [2024-06-27 20:16:24,695 INFO L175 Difference]: Start difference. First operand has 103 places, 140 transitions, 1212 flow. Second operand 8 states and 201 transitions. [2024-06-27 20:16:24,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 186 transitions, 1808 flow [2024-06-27 20:16:24,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 186 transitions, 1658 flow, removed 57 selfloop flow, removed 3 redundant places. [2024-06-27 20:16:24,830 INFO L231 Difference]: Finished difference. Result has 108 places, 140 transitions, 1227 flow [2024-06-27 20:16:24,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1062, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1227, PETRI_PLACES=108, PETRI_TRANSITIONS=140} [2024-06-27 20:16:24,830 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 53 predicate places. [2024-06-27 20:16:24,830 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 140 transitions, 1227 flow [2024-06-27 20:16:24,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:24,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:24,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:24,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:16:24,831 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:16:24,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:24,831 INFO L85 PathProgramCache]: Analyzing trace with hash 736185312, now seen corresponding path program 4 times [2024-06-27 20:16:24,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:24,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394732832] [2024-06-27 20:16:24,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:24,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:24,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:25,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:25,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:25,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394732832] [2024-06-27 20:16:25,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394732832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:25,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:25,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:25,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5853230] [2024-06-27 20:16:25,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:25,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:25,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:25,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:25,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:25,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 20:16:25,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 140 transitions, 1227 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:25,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:25,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 20:16:25,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:27,761 INFO L124 PetriNetUnfolderBase]: 11891/16531 cut-off events. [2024-06-27 20:16:27,761 INFO L125 PetriNetUnfolderBase]: For 287018/287023 co-relation queries the response was YES. [2024-06-27 20:16:27,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89441 conditions, 16531 events. 11891/16531 cut-off events. For 287018/287023 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 90081 event pairs, 5393 based on Foata normal form. 6/16519 useless extension candidates. Maximal degree in co-relation 89401. Up to 15564 conditions per place. [2024-06-27 20:16:27,916 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 99 selfloop transitions, 82 changer transitions 0/187 dead transitions. [2024-06-27 20:16:27,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 187 transitions, 1907 flow [2024-06-27 20:16:27,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:27,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:27,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 20:16:27,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-27 20:16:27,918 INFO L175 Difference]: Start difference. First operand has 108 places, 140 transitions, 1227 flow. Second operand 8 states and 196 transitions. [2024-06-27 20:16:27,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 187 transitions, 1907 flow [2024-06-27 20:16:28,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 187 transitions, 1734 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 20:16:28,074 INFO L231 Difference]: Finished difference. Result has 109 places, 144 transitions, 1313 flow [2024-06-27 20:16:28,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1062, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1313, PETRI_PLACES=109, PETRI_TRANSITIONS=144} [2024-06-27 20:16:28,074 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 54 predicate places. [2024-06-27 20:16:28,075 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 144 transitions, 1313 flow [2024-06-27 20:16:28,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:28,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:28,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:28,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:16:28,076 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:16:28,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:28,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1749078692, now seen corresponding path program 5 times [2024-06-27 20:16:28,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:28,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864898667] [2024-06-27 20:16:28,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:28,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:28,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:28,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:28,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:29,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864898667] [2024-06-27 20:16:29,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864898667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:29,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:29,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:29,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192946105] [2024-06-27 20:16:29,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:29,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:29,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:29,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:29,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:29,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 20:16:29,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 144 transitions, 1313 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:29,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:29,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 20:16:29,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:31,159 INFO L124 PetriNetUnfolderBase]: 11935/16591 cut-off events. [2024-06-27 20:16:31,159 INFO L125 PetriNetUnfolderBase]: For 310234/310239 co-relation queries the response was YES. [2024-06-27 20:16:31,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91155 conditions, 16591 events. 11935/16591 cut-off events. For 310234/310239 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 90469 event pairs, 5385 based on Foata normal form. 6/16579 useless extension candidates. Maximal degree in co-relation 91114. Up to 15602 conditions per place. [2024-06-27 20:16:31,299 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 104 selfloop transitions, 82 changer transitions 0/192 dead transitions. [2024-06-27 20:16:31,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 192 transitions, 2011 flow [2024-06-27 20:16:31,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:31,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:31,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 20:16:31,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47836538461538464 [2024-06-27 20:16:31,302 INFO L175 Difference]: Start difference. First operand has 109 places, 144 transitions, 1313 flow. Second operand 8 states and 199 transitions. [2024-06-27 20:16:31,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 192 transitions, 2011 flow [2024-06-27 20:16:31,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 192 transitions, 1801 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-27 20:16:31,453 INFO L231 Difference]: Finished difference. Result has 112 places, 148 transitions, 1362 flow [2024-06-27 20:16:31,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1117, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1362, PETRI_PLACES=112, PETRI_TRANSITIONS=148} [2024-06-27 20:16:31,453 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 57 predicate places. [2024-06-27 20:16:31,454 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 148 transitions, 1362 flow [2024-06-27 20:16:31,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:31,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:31,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:31,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:16:31,454 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:16:31,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:31,454 INFO L85 PathProgramCache]: Analyzing trace with hash -985947748, now seen corresponding path program 6 times [2024-06-27 20:16:31,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:31,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424615121] [2024-06-27 20:16:31,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:31,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:31,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:32,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:32,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:32,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424615121] [2024-06-27 20:16:32,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424615121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:32,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:32,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:32,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654744163] [2024-06-27 20:16:32,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:32,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:32,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:32,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:32,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:32,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 20:16:32,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 148 transitions, 1362 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:32,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:32,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 20:16:32,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:34,448 INFO L124 PetriNetUnfolderBase]: 11917/16567 cut-off events. [2024-06-27 20:16:34,448 INFO L125 PetriNetUnfolderBase]: For 331038/331043 co-relation queries the response was YES. [2024-06-27 20:16:34,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91849 conditions, 16567 events. 11917/16567 cut-off events. For 331038/331043 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 90283 event pairs, 5382 based on Foata normal form. 6/16555 useless extension candidates. Maximal degree in co-relation 91807. Up to 15587 conditions per place. [2024-06-27 20:16:34,607 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 100 selfloop transitions, 83 changer transitions 0/189 dead transitions. [2024-06-27 20:16:34,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 189 transitions, 1852 flow [2024-06-27 20:16:34,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:34,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:34,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-27 20:16:34,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-27 20:16:34,609 INFO L175 Difference]: Start difference. First operand has 112 places, 148 transitions, 1362 flow. Second operand 8 states and 195 transitions. [2024-06-27 20:16:34,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 189 transitions, 1852 flow [2024-06-27 20:16:34,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 189 transitions, 1527 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-27 20:16:34,806 INFO L231 Difference]: Finished difference. Result has 113 places, 148 transitions, 1214 flow [2024-06-27 20:16:34,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1214, PETRI_PLACES=113, PETRI_TRANSITIONS=148} [2024-06-27 20:16:34,806 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 58 predicate places. [2024-06-27 20:16:34,806 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 148 transitions, 1214 flow [2024-06-27 20:16:34,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:34,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:34,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:34,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:16:34,807 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:16:34,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:34,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1931533231, now seen corresponding path program 1 times [2024-06-27 20:16:34,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:34,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807814557] [2024-06-27 20:16:34,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:34,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:34,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:35,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:35,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:35,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807814557] [2024-06-27 20:16:35,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807814557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:35,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:35,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:16:35,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51803561] [2024-06-27 20:16:35,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:35,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:16:35,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:35,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:16:35,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:16:35,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-27 20:16:35,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 148 transitions, 1214 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:35,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:35,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-27 20:16:35,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:37,391 INFO L124 PetriNetUnfolderBase]: 11165/15797 cut-off events. [2024-06-27 20:16:37,392 INFO L125 PetriNetUnfolderBase]: For 344150/344183 co-relation queries the response was YES. [2024-06-27 20:16:37,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89472 conditions, 15797 events. 11165/15797 cut-off events. For 344150/344183 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 89239 event pairs, 5719 based on Foata normal form. 18/15778 useless extension candidates. Maximal degree in co-relation 89429. Up to 15139 conditions per place. [2024-06-27 20:16:37,531 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 144 selfloop transitions, 23 changer transitions 0/181 dead transitions. [2024-06-27 20:16:37,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 181 transitions, 1822 flow [2024-06-27 20:16:37,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:16:37,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:16:37,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-27 20:16:37,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-27 20:16:37,532 INFO L175 Difference]: Start difference. First operand has 113 places, 148 transitions, 1214 flow. Second operand 6 states and 144 transitions. [2024-06-27 20:16:37,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 181 transitions, 1822 flow [2024-06-27 20:16:37,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 181 transitions, 1645 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 20:16:37,709 INFO L231 Difference]: Finished difference. Result has 114 places, 162 transitions, 1262 flow [2024-06-27 20:16:37,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1262, PETRI_PLACES=114, PETRI_TRANSITIONS=162} [2024-06-27 20:16:37,709 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 59 predicate places. [2024-06-27 20:16:37,709 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 162 transitions, 1262 flow [2024-06-27 20:16:37,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:37,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:37,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:37,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:16:37,710 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:16:37,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:37,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1224854965, now seen corresponding path program 1 times [2024-06-27 20:16:37,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:37,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459111438] [2024-06-27 20:16:37,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:37,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:37,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:38,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:38,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:38,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459111438] [2024-06-27 20:16:38,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459111438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:38,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:38,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:38,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818449778] [2024-06-27 20:16:38,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:38,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:38,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:38,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:38,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:38,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 20:16:38,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 162 transitions, 1262 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:38,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:38,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 20:16:38,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:41,001 INFO L124 PetriNetUnfolderBase]: 12425/17316 cut-off events. [2024-06-27 20:16:41,001 INFO L125 PetriNetUnfolderBase]: For 407563/407691 co-relation queries the response was YES. [2024-06-27 20:16:41,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101589 conditions, 17316 events. 12425/17316 cut-off events. For 407563/407691 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 95155 event pairs, 4759 based on Foata normal form. 14/17280 useless extension candidates. Maximal degree in co-relation 101543. Up to 16452 conditions per place. [2024-06-27 20:16:41,140 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 171 selfloop transitions, 44 changer transitions 0/224 dead transitions. [2024-06-27 20:16:41,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 224 transitions, 2134 flow [2024-06-27 20:16:41,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:16:41,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:16:41,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-27 20:16:41,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-27 20:16:41,141 INFO L175 Difference]: Start difference. First operand has 114 places, 162 transitions, 1262 flow. Second operand 9 states and 216 transitions. [2024-06-27 20:16:41,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 224 transitions, 2134 flow [2024-06-27 20:16:41,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 224 transitions, 2088 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-27 20:16:41,400 INFO L231 Difference]: Finished difference. Result has 122 places, 168 transitions, 1456 flow [2024-06-27 20:16:41,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1216, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1456, PETRI_PLACES=122, PETRI_TRANSITIONS=168} [2024-06-27 20:16:41,401 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 67 predicate places. [2024-06-27 20:16:41,401 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 168 transitions, 1456 flow [2024-06-27 20:16:41,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:41,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:41,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:41,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:16:41,402 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:16:41,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:41,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1221998005, now seen corresponding path program 2 times [2024-06-27 20:16:41,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:41,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228353536] [2024-06-27 20:16:41,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:41,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:41,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:42,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:42,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:42,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228353536] [2024-06-27 20:16:42,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228353536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:42,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:42,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:42,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922599148] [2024-06-27 20:16:42,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:42,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:42,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:42,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:42,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:42,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 20:16:42,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 168 transitions, 1456 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:42,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:42,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 20:16:42,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:45,045 INFO L124 PetriNetUnfolderBase]: 12410/17295 cut-off events. [2024-06-27 20:16:45,045 INFO L125 PetriNetUnfolderBase]: For 447758/447886 co-relation queries the response was YES. [2024-06-27 20:16:45,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104509 conditions, 17295 events. 12410/17295 cut-off events. For 447758/447886 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 95131 event pairs, 5571 based on Foata normal form. 14/17259 useless extension candidates. Maximal degree in co-relation 104460. Up to 16538 conditions per place. [2024-06-27 20:16:45,205 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 166 selfloop transitions, 38 changer transitions 0/213 dead transitions. [2024-06-27 20:16:45,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 213 transitions, 2012 flow [2024-06-27 20:16:45,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:45,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:45,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-27 20:16:45,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567307692307692 [2024-06-27 20:16:45,206 INFO L175 Difference]: Start difference. First operand has 122 places, 168 transitions, 1456 flow. Second operand 8 states and 190 transitions. [2024-06-27 20:16:45,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 213 transitions, 2012 flow [2024-06-27 20:16:45,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 213 transitions, 1849 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-27 20:16:45,506 INFO L231 Difference]: Finished difference. Result has 125 places, 168 transitions, 1380 flow [2024-06-27 20:16:45,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1293, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1380, PETRI_PLACES=125, PETRI_TRANSITIONS=168} [2024-06-27 20:16:45,506 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 70 predicate places. [2024-06-27 20:16:45,506 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 168 transitions, 1380 flow [2024-06-27 20:16:45,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:45,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:45,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:45,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:16:45,507 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:16:45,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:45,507 INFO L85 PathProgramCache]: Analyzing trace with hash 204841825, now seen corresponding path program 3 times [2024-06-27 20:16:45,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:45,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764994955] [2024-06-27 20:16:45,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:45,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:45,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:46,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:46,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:46,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764994955] [2024-06-27 20:16:46,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764994955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:46,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:46,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:46,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181177757] [2024-06-27 20:16:46,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:46,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:46,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:46,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:46,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:46,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 20:16:46,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 168 transitions, 1380 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:46,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:46,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 20:16:46,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:49,044 INFO L124 PetriNetUnfolderBase]: 12446/17346 cut-off events. [2024-06-27 20:16:49,044 INFO L125 PetriNetUnfolderBase]: For 477838/477966 co-relation queries the response was YES. [2024-06-27 20:16:49,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105867 conditions, 17346 events. 12446/17346 cut-off events. For 477838/477966 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 95371 event pairs, 5584 based on Foata normal form. 10/17304 useless extension candidates. Maximal degree in co-relation 105816. Up to 16515 conditions per place. [2024-06-27 20:16:49,222 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 148 selfloop transitions, 54 changer transitions 0/211 dead transitions. [2024-06-27 20:16:49,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 211 transitions, 1982 flow [2024-06-27 20:16:49,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:49,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:49,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-27 20:16:49,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45913461538461536 [2024-06-27 20:16:49,223 INFO L175 Difference]: Start difference. First operand has 125 places, 168 transitions, 1380 flow. Second operand 8 states and 191 transitions. [2024-06-27 20:16:49,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 211 transitions, 1982 flow [2024-06-27 20:16:49,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 211 transitions, 1896 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 20:16:49,517 INFO L231 Difference]: Finished difference. Result has 126 places, 171 transitions, 1492 flow [2024-06-27 20:16:49,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1294, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1492, PETRI_PLACES=126, PETRI_TRANSITIONS=171} [2024-06-27 20:16:49,518 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 71 predicate places. [2024-06-27 20:16:49,518 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 171 transitions, 1492 flow [2024-06-27 20:16:49,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:49,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:49,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:49,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:16:49,519 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:16:49,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:49,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1106522137, now seen corresponding path program 1 times [2024-06-27 20:16:49,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:49,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759982787] [2024-06-27 20:16:49,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:49,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:49,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:50,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:50,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:50,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759982787] [2024-06-27 20:16:50,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759982787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:50,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:50,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:16:50,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61434179] [2024-06-27 20:16:50,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:50,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:16:50,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:50,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:16:50,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:16:50,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 20:16:50,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 171 transitions, 1492 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:50,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:50,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 20:16:50,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:54,118 INFO L124 PetriNetUnfolderBase]: 12563/17484 cut-off events. [2024-06-27 20:16:54,118 INFO L125 PetriNetUnfolderBase]: For 525371/525508 co-relation queries the response was YES. [2024-06-27 20:16:54,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109795 conditions, 17484 events. 12563/17484 cut-off events. For 525371/525508 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 95803 event pairs, 5293 based on Foata normal form. 18/17433 useless extension candidates. Maximal degree in co-relation 109743. Up to 16662 conditions per place. [2024-06-27 20:16:54,386 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 168 selfloop transitions, 43 changer transitions 0/220 dead transitions. [2024-06-27 20:16:54,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 220 transitions, 2134 flow [2024-06-27 20:16:54,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:16:54,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:16:54,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 20:16:54,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46634615384615385 [2024-06-27 20:16:54,387 INFO L175 Difference]: Start difference. First operand has 126 places, 171 transitions, 1492 flow. Second operand 8 states and 194 transitions. [2024-06-27 20:16:54,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 220 transitions, 2134 flow [2024-06-27 20:16:54,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 220 transitions, 1962 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 20:16:54,624 INFO L231 Difference]: Finished difference. Result has 128 places, 174 transitions, 1494 flow [2024-06-27 20:16:54,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1320, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1494, PETRI_PLACES=128, PETRI_TRANSITIONS=174} [2024-06-27 20:16:54,625 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 73 predicate places. [2024-06-27 20:16:54,625 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 174 transitions, 1494 flow [2024-06-27 20:16:54,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:54,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:54,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:54,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:16:54,625 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:16:54,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:54,626 INFO L85 PathProgramCache]: Analyzing trace with hash -224704660, now seen corresponding path program 1 times [2024-06-27 20:16:54,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:54,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759887296] [2024-06-27 20:16:54,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:54,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:54,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:55,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:55,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:55,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759887296] [2024-06-27 20:16:55,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759887296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:55,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:55,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:16:55,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142861181] [2024-06-27 20:16:55,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:55,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:16:55,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:55,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:16:55,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:16:55,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-27 20:16:55,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 174 transitions, 1494 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:55,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:55,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-27 20:16:55,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:57,632 INFO L124 PetriNetUnfolderBase]: 11891/16764 cut-off events. [2024-06-27 20:16:57,633 INFO L125 PetriNetUnfolderBase]: For 560947/561124 co-relation queries the response was YES. [2024-06-27 20:16:57,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109086 conditions, 16764 events. 11891/16764 cut-off events. For 560947/561124 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 94556 event pairs, 5503 based on Foata normal form. 19/16667 useless extension candidates. Maximal degree in co-relation 109033. Up to 15849 conditions per place. [2024-06-27 20:16:57,765 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 153 selfloop transitions, 29 changer transitions 0/200 dead transitions. [2024-06-27 20:16:57,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 200 transitions, 1992 flow [2024-06-27 20:16:57,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:16:57,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:16:57,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-27 20:16:57,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-27 20:16:57,766 INFO L175 Difference]: Start difference. First operand has 128 places, 174 transitions, 1494 flow. Second operand 6 states and 144 transitions. [2024-06-27 20:16:57,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 200 transitions, 1992 flow [2024-06-27 20:16:58,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 200 transitions, 1844 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 20:16:58,039 INFO L231 Difference]: Finished difference. Result has 128 places, 178 transitions, 1491 flow [2024-06-27 20:16:58,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1346, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1491, PETRI_PLACES=128, PETRI_TRANSITIONS=178} [2024-06-27 20:16:58,040 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 73 predicate places. [2024-06-27 20:16:58,040 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 178 transitions, 1491 flow [2024-06-27 20:16:58,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:58,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:58,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:58,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:16:58,044 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:16:58,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:58,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1133617483, now seen corresponding path program 4 times [2024-06-27 20:16:58,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:58,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017841135] [2024-06-27 20:16:58,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:58,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:58,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:59,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:59,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:59,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017841135] [2024-06-27 20:16:59,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017841135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:59,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:59,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:16:59,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411999635] [2024-06-27 20:16:59,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:59,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:16:59,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:59,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:16:59,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:16:59,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 20:16:59,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 178 transitions, 1491 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:59,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:59,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 20:16:59,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:01,918 INFO L124 PetriNetUnfolderBase]: 12580/17504 cut-off events. [2024-06-27 20:17:01,918 INFO L125 PetriNetUnfolderBase]: For 604261/604417 co-relation queries the response was YES. [2024-06-27 20:17:02,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116076 conditions, 17504 events. 12580/17504 cut-off events. For 604261/604417 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 96041 event pairs, 5544 based on Foata normal form. 6/17429 useless extension candidates. Maximal degree in co-relation 116022. Up to 16697 conditions per place. [2024-06-27 20:17:02,268 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 157 selfloop transitions, 53 changer transitions 0/219 dead transitions. [2024-06-27 20:17:02,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 219 transitions, 2115 flow [2024-06-27 20:17:02,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:02,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:02,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-27 20:17:02,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519230769230769 [2024-06-27 20:17:02,270 INFO L175 Difference]: Start difference. First operand has 128 places, 178 transitions, 1491 flow. Second operand 8 states and 188 transitions. [2024-06-27 20:17:02,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 219 transitions, 2115 flow [2024-06-27 20:17:02,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 219 transitions, 2014 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-27 20:17:02,588 INFO L231 Difference]: Finished difference. Result has 132 places, 181 transitions, 1598 flow [2024-06-27 20:17:02,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1390, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1598, PETRI_PLACES=132, PETRI_TRANSITIONS=181} [2024-06-27 20:17:02,589 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 77 predicate places. [2024-06-27 20:17:02,589 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 181 transitions, 1598 flow [2024-06-27 20:17:02,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:02,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:02,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:02,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:17:02,590 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:17:02,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:02,590 INFO L85 PathProgramCache]: Analyzing trace with hash -271526343, now seen corresponding path program 2 times [2024-06-27 20:17:02,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:02,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725776668] [2024-06-27 20:17:02,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:02,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:02,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:03,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:03,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:03,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725776668] [2024-06-27 20:17:03,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725776668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:03,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:03,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:03,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982005211] [2024-06-27 20:17:03,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:03,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:03,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:03,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:03,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:04,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 20:17:04,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 181 transitions, 1598 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:04,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:04,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 20:17:04,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:06,972 INFO L124 PetriNetUnfolderBase]: 12616/17561 cut-off events. [2024-06-27 20:17:06,972 INFO L125 PetriNetUnfolderBase]: For 654634/654806 co-relation queries the response was YES. [2024-06-27 20:17:07,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119474 conditions, 17561 events. 12616/17561 cut-off events. For 654634/654806 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 96339 event pairs, 5257 based on Foata normal form. 18/17506 useless extension candidates. Maximal degree in co-relation 119419. Up to 16735 conditions per place. [2024-06-27 20:17:07,120 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 175 selfloop transitions, 43 changer transitions 0/227 dead transitions. [2024-06-27 20:17:07,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 227 transitions, 2258 flow [2024-06-27 20:17:07,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:07,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:07,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-27 20:17:07,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4543269230769231 [2024-06-27 20:17:07,121 INFO L175 Difference]: Start difference. First operand has 132 places, 181 transitions, 1598 flow. Second operand 8 states and 189 transitions. [2024-06-27 20:17:07,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 227 transitions, 2258 flow [2024-06-27 20:17:07,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 227 transitions, 2076 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-27 20:17:07,560 INFO L231 Difference]: Finished difference. Result has 134 places, 184 transitions, 1602 flow [2024-06-27 20:17:07,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1416, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1602, PETRI_PLACES=134, PETRI_TRANSITIONS=184} [2024-06-27 20:17:07,561 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 79 predicate places. [2024-06-27 20:17:07,561 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 184 transitions, 1602 flow [2024-06-27 20:17:07,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:07,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:07,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:07,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 20:17:07,562 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:17:07,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:07,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1140297301, now seen corresponding path program 3 times [2024-06-27 20:17:07,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:07,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642543307] [2024-06-27 20:17:07,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:07,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:07,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:08,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:08,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:08,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642543307] [2024-06-27 20:17:08,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642543307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:08,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:08,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:08,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643869754] [2024-06-27 20:17:08,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:08,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:08,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:08,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:08,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:09,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 20:17:09,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 184 transitions, 1602 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:09,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:09,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 20:17:09,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:11,748 INFO L124 PetriNetUnfolderBase]: 12652/17613 cut-off events. [2024-06-27 20:17:11,749 INFO L125 PetriNetUnfolderBase]: For 703001/703173 co-relation queries the response was YES. [2024-06-27 20:17:11,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122720 conditions, 17613 events. 12652/17613 cut-off events. For 703001/703173 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 96663 event pairs, 4997 based on Foata normal form. 18/17558 useless extension candidates. Maximal degree in co-relation 122664. Up to 16650 conditions per place. [2024-06-27 20:17:11,936 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 173 selfloop transitions, 54 changer transitions 0/236 dead transitions. [2024-06-27 20:17:11,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 236 transitions, 2550 flow [2024-06-27 20:17:11,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:11,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:11,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-27 20:17:11,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-27 20:17:11,938 INFO L175 Difference]: Start difference. First operand has 134 places, 184 transitions, 1602 flow. Second operand 8 states and 192 transitions. [2024-06-27 20:17:11,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 236 transitions, 2550 flow [2024-06-27 20:17:12,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 236 transitions, 2390 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-27 20:17:12,453 INFO L231 Difference]: Finished difference. Result has 136 places, 190 transitions, 1746 flow [2024-06-27 20:17:12,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1442, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1746, PETRI_PLACES=136, PETRI_TRANSITIONS=190} [2024-06-27 20:17:12,454 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 81 predicate places. [2024-06-27 20:17:12,454 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 190 transitions, 1746 flow [2024-06-27 20:17:12,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:12,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:12,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:12,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 20:17:12,455 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:17:12,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:12,455 INFO L85 PathProgramCache]: Analyzing trace with hash -499427493, now seen corresponding path program 4 times [2024-06-27 20:17:12,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:12,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943936603] [2024-06-27 20:17:12,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:12,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:12,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:13,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:13,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:13,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943936603] [2024-06-27 20:17:13,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943936603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:13,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:13,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:13,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686705754] [2024-06-27 20:17:13,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:13,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:13,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:13,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:13,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:13,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 20:17:13,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 190 transitions, 1746 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:13,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:13,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 20:17:13,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:16,726 INFO L124 PetriNetUnfolderBase]: 12637/17592 cut-off events. [2024-06-27 20:17:16,726 INFO L125 PetriNetUnfolderBase]: For 752368/752540 co-relation queries the response was YES. [2024-06-27 20:17:16,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125264 conditions, 17592 events. 12637/17592 cut-off events. For 752368/752540 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 96574 event pairs, 5254 based on Foata normal form. 18/17537 useless extension candidates. Maximal degree in co-relation 125207. Up to 16766 conditions per place. [2024-06-27 20:17:16,911 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 183 selfloop transitions, 42 changer transitions 0/234 dead transitions. [2024-06-27 20:17:16,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 234 transitions, 2338 flow [2024-06-27 20:17:16,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:16,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:16,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-27 20:17:16,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45913461538461536 [2024-06-27 20:17:16,912 INFO L175 Difference]: Start difference. First operand has 136 places, 190 transitions, 1746 flow. Second operand 8 states and 191 transitions. [2024-06-27 20:17:16,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 234 transitions, 2338 flow [2024-06-27 20:17:17,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 234 transitions, 2140 flow, removed 76 selfloop flow, removed 4 redundant places. [2024-06-27 20:17:17,285 INFO L231 Difference]: Finished difference. Result has 140 places, 190 transitions, 1642 flow [2024-06-27 20:17:17,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1548, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1642, PETRI_PLACES=140, PETRI_TRANSITIONS=190} [2024-06-27 20:17:17,285 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 85 predicate places. [2024-06-27 20:17:17,286 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 190 transitions, 1642 flow [2024-06-27 20:17:17,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:17,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:17,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:17,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 20:17:17,286 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:17:17,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:17,287 INFO L85 PathProgramCache]: Analyzing trace with hash -252024340, now seen corresponding path program 2 times [2024-06-27 20:17:17,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:17,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660516001] [2024-06-27 20:17:17,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:17,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:17,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:18,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:18,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:18,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660516001] [2024-06-27 20:17:18,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660516001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:18,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:18,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:17:18,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650293631] [2024-06-27 20:17:18,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:18,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:17:18,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:18,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:17:18,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:17:18,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-27 20:17:18,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 190 transitions, 1642 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:18,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:18,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-27 20:17:18,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:20,656 INFO L124 PetriNetUnfolderBase]: 11903/16798 cut-off events. [2024-06-27 20:17:20,657 INFO L125 PetriNetUnfolderBase]: For 771768/771953 co-relation queries the response was YES. [2024-06-27 20:17:20,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120893 conditions, 16798 events. 11903/16798 cut-off events. For 771768/771953 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 94926 event pairs, 5510 based on Foata normal form. 15/16692 useless extension candidates. Maximal degree in co-relation 120834. Up to 15851 conditions per place. [2024-06-27 20:17:20,833 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 155 selfloop transitions, 35 changer transitions 0/211 dead transitions. [2024-06-27 20:17:20,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 211 transitions, 2154 flow [2024-06-27 20:17:20,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:17:20,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:17:20,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-27 20:17:20,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44871794871794873 [2024-06-27 20:17:20,834 INFO L175 Difference]: Start difference. First operand has 140 places, 190 transitions, 1642 flow. Second operand 6 states and 140 transitions. [2024-06-27 20:17:20,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 211 transitions, 2154 flow [2024-06-27 20:17:21,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 211 transitions, 2042 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 20:17:21,318 INFO L231 Difference]: Finished difference. Result has 139 places, 194 transitions, 1697 flow [2024-06-27 20:17:21,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1530, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1697, PETRI_PLACES=139, PETRI_TRANSITIONS=194} [2024-06-27 20:17:21,319 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 84 predicate places. [2024-06-27 20:17:21,319 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 194 transitions, 1697 flow [2024-06-27 20:17:21,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:21,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:21,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:21,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 20:17:21,319 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:17:21,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:21,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1449074398, now seen corresponding path program 1 times [2024-06-27 20:17:21,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:21,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600818746] [2024-06-27 20:17:21,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:21,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:21,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat