./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-divine/one_time_barrier_2t.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/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/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-divine/one_time_barrier_2t.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 16b049fb81e05ec2192b5dc6cabf7c8b89c1486d4e623332a0a01a89383c6c7d --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:29:58,098 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:29:58,100 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:29:58,143 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:29:58,143 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:29:58,144 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:29:58,146 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:29:58,148 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:29:58,150 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:29:58,154 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:29:58,155 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:29:58,156 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:29:58,157 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:29:58,158 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:29:58,159 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:29:58,162 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:29:58,163 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:29:58,164 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:29:58,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:29:58,170 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:29:58,172 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:29:58,173 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:29:58,173 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:29:58,174 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:29:58,175 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:29:58,181 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:29:58,182 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:29:58,182 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:29:58,183 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:29:58,184 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:29:58,185 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:29:58,185 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:29:58,186 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:29:58,187 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:29:58,187 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:29:58,189 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:29:58,189 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:29:58,190 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:29:58,190 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:29:58,190 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:29:58,191 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:29:58,192 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:29:58,193 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:29:58,221 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:29:58,221 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:29:58,221 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:29:58,222 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:29:58,222 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:29:58,223 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:29:58,223 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:29:58,223 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:29:58,224 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:29:58,224 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:29:58,224 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:29:58,224 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:29:58,225 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:29:58,225 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:29:58,225 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:29:58,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:29:58,225 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:29:58,226 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:29:58,226 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:29:58,226 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:29:58,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:29:58,226 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:29:58,227 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:29:58,227 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:29:58,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:29:58,227 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:29:58,227 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:29:58,228 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:29:58,228 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:29:58,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:29:58,228 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:29:58,228 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:29:58,229 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:29:58,229 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 16b049fb81e05ec2192b5dc6cabf7c8b89c1486d4e623332a0a01a89383c6c7d [2022-07-22 21:29:58,423 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:29:58,444 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:29:58,447 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:29:58,448 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:29:58,448 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:29:58,449 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-divine/one_time_barrier_2t.i [2022-07-22 21:29:58,522 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a416d059/de4c3a5db9d340819daf0b8b602f10bf/FLAG9977c0093 [2022-07-22 21:29:58,904 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:29:58,905 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/one_time_barrier_2t.i [2022-07-22 21:29:58,919 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a416d059/de4c3a5db9d340819daf0b8b602f10bf/FLAG9977c0093 [2022-07-22 21:29:59,274 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a416d059/de4c3a5db9d340819daf0b8b602f10bf [2022-07-22 21:29:59,276 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:29:59,277 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:29:59,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:29:59,283 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:29:59,286 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:29:59,287 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:29:59" (1/1) ... [2022-07-22 21:29:59,288 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1da7a2c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:29:59, skipping insertion in model container [2022-07-22 21:29:59,288 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:29:59" (1/1) ... [2022-07-22 21:29:59,294 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:29:59,330 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:29:59,453 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-22 21:29:59,624 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/one_time_barrier_2t.i[30448,30461] [2022-07-22 21:29:59,634 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/one_time_barrier_2t.i[30811,30824] [2022-07-22 21:29:59,646 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/one_time_barrier_2t.i[31483,31496] [2022-07-22 21:29:59,648 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/one_time_barrier_2t.i[31534,31547] [2022-07-22 21:29:59,651 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/one_time_barrier_2t.i[31683,31696] [2022-07-22 21:29:59,653 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/one_time_barrier_2t.i[31760,31773] [2022-07-22 21:29:59,656 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/one_time_barrier_2t.i[31807,31820] [2022-07-22 21:29:59,657 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/one_time_barrier_2t.i[31916,31929] [2022-07-22 21:29:59,660 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/one_time_barrier_2t.i[32035,32048] [2022-07-22 21:29:59,661 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/one_time_barrier_2t.i[32083,32096] [2022-07-22 21:29:59,663 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/one_time_barrier_2t.i[32160,32173] [2022-07-22 21:29:59,665 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/one_time_barrier_2t.i[32286,32299] [2022-07-22 21:29:59,674 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/one_time_barrier_2t.i[32869,32882] [2022-07-22 21:29:59,675 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/one_time_barrier_2t.i[32946,32959] [2022-07-22 21:29:59,675 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:29:59,682 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:29:59,692 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-22 21:29:59,711 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/one_time_barrier_2t.i[30448,30461] [2022-07-22 21:29:59,713 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/one_time_barrier_2t.i[30811,30824] [2022-07-22 21:29:59,717 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/one_time_barrier_2t.i[31483,31496] [2022-07-22 21:29:59,720 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/one_time_barrier_2t.i[31534,31547] [2022-07-22 21:29:59,721 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/one_time_barrier_2t.i[31683,31696] [2022-07-22 21:29:59,728 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/one_time_barrier_2t.i[31760,31773] [2022-07-22 21:29:59,737 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/one_time_barrier_2t.i[31807,31820] [2022-07-22 21:29:59,741 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/one_time_barrier_2t.i[31916,31929] [2022-07-22 21:29:59,742 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/one_time_barrier_2t.i[32035,32048] [2022-07-22 21:29:59,743 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/one_time_barrier_2t.i[32083,32096] [2022-07-22 21:29:59,747 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/one_time_barrier_2t.i[32160,32173] [2022-07-22 21:29:59,748 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/one_time_barrier_2t.i[32286,32299] [2022-07-22 21:29:59,754 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/one_time_barrier_2t.i[32869,32882] [2022-07-22 21:29:59,757 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/one_time_barrier_2t.i[32946,32959] [2022-07-22 21:29:59,758 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:29:59,783 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:29:59,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:29:59 WrapperNode [2022-07-22 21:29:59,784 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:29:59,784 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:29:59,785 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:29:59,785 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:29:59,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:29:59" (1/1) ... [2022-07-22 21:29:59,811 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:29:59" (1/1) ... [2022-07-22 21:29:59,848 INFO L137 Inliner]: procedures = 174, calls = 70, calls flagged for inlining = 6, calls inlined = 8, statements flattened = 459 [2022-07-22 21:29:59,849 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:29:59,849 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:29:59,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:29:59,850 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:29:59,856 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:29:59" (1/1) ... [2022-07-22 21:29:59,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:29:59" (1/1) ... [2022-07-22 21:29:59,863 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:29:59" (1/1) ... [2022-07-22 21:29:59,863 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:29:59" (1/1) ... [2022-07-22 21:29:59,883 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:29:59" (1/1) ... [2022-07-22 21:29:59,892 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:29:59" (1/1) ... [2022-07-22 21:29:59,896 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:29:59" (1/1) ... [2022-07-22 21:29:59,901 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:29:59,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:29:59,905 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:29:59,905 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:29:59,906 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:29:59" (1/1) ... [2022-07-22 21:29:59,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:29:59,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:29:59,952 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 21:29:59,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 21:29:59,994 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:29:59,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:29:59,995 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-22 21:29:59,995 INFO L130 BoogieDeclarations]: Found specification of procedure worker_fn [2022-07-22 21:29:59,995 INFO L138 BoogieDeclarations]: Found implementation of procedure worker_fn [2022-07-22 21:29:59,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:29:59,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-22 21:29:59,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:29:59,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-22 21:29:59,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:29:59,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:29:59,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:29:59,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:29:59,998 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:30:00,163 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:30:00,164 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:30:00,712 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:30:00,722 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:30:00,722 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2022-07-22 21:30:00,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:30:00 BoogieIcfgContainer [2022-07-22 21:30:00,724 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:30:00,725 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:30:00,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:30:00,728 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:30:00,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:29:59" (1/3) ... [2022-07-22 21:30:00,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@583b1747 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:30:00, skipping insertion in model container [2022-07-22 21:30:00,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:29:59" (2/3) ... [2022-07-22 21:30:00,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@583b1747 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:30:00, skipping insertion in model container [2022-07-22 21:30:00,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:30:00" (3/3) ... [2022-07-22 21:30:00,731 INFO L111 eAbstractionObserver]: Analyzing ICFG one_time_barrier_2t.i [2022-07-22 21:30:00,735 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:30:00,742 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:30:00,742 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2022-07-22 21:30:00,742 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:30:00,821 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-22 21:30:00,874 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 468 places, 527 transitions, 1062 flow [2022-07-22 21:30:01,129 INFO L129 PetriNetUnfolder]: 94/778 cut-off events. [2022-07-22 21:30:01,130 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:30:01,149 INFO L84 FinitePrefix]: Finished finitePrefix Result has 784 conditions, 778 events. 94/778 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2655 event pairs, 0 based on Foata normal form. 0/640 useless extension candidates. Maximal degree in co-relation 460. Up to 4 conditions per place. [2022-07-22 21:30:01,150 INFO L82 GeneralOperation]: Start removeDead. Operand has 468 places, 527 transitions, 1062 flow [2022-07-22 21:30:01,168 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 468 places, 527 transitions, 1062 flow [2022-07-22 21:30:01,176 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:30:01,181 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3ade65d8, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2562809f [2022-07-22 21:30:01,181 INFO L358 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2022-07-22 21:30:01,186 INFO L129 PetriNetUnfolder]: 3/54 cut-off events. [2022-07-22 21:30:01,186 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:30:01,186 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:30:01,187 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:30:01,191 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 37 more)] === [2022-07-22 21:30:01,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:30:01,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1781321971, now seen corresponding path program 1 times [2022-07-22 21:30:01,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:30:01,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020013172] [2022-07-22 21:30:01,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:30:01,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:30:01,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:30:01,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:30:01,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:30:01,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020013172] [2022-07-22 21:30:01,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020013172] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:30:01,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:30:01,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:30:01,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503491720] [2022-07-22 21:30:01,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:30:01,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:30:01,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:30:01,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:30:01,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:30:01,488 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 527 [2022-07-22 21:30:01,493 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 527 transitions, 1062 flow. Second operand has 3 states, 3 states have (on average 474.0) internal successors, (1422), 3 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:01,493 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:30:01,493 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 527 [2022-07-22 21:30:01,502 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:30:01,699 INFO L129 PetriNetUnfolder]: 28/718 cut-off events. [2022-07-22 21:30:01,699 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-22 21:30:01,705 INFO L84 FinitePrefix]: Finished finitePrefix Result has 742 conditions, 718 events. 28/718 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2550 event pairs, 0 based on Foata normal form. 65/711 useless extension candidates. Maximal degree in co-relation 421. Up to 12 conditions per place. [2022-07-22 21:30:01,711 INFO L132 encePairwiseOnDemand]: 481/527 looper letters, 15 selfloop transitions, 2 changer transitions 0/490 dead transitions. [2022-07-22 21:30:01,711 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 490 transitions, 1022 flow [2022-07-22 21:30:01,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:30:01,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:30:01,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1481 transitions. [2022-07-22 21:30:01,739 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9367488931056294 [2022-07-22 21:30:01,740 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1481 transitions. [2022-07-22 21:30:01,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1481 transitions. [2022-07-22 21:30:01,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:30:01,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1481 transitions. [2022-07-22 21:30:01,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 493.6666666666667) internal successors, (1481), 3 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:01,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 527.0) internal successors, (2108), 4 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:01,769 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 527.0) internal successors, (2108), 4 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:01,771 INFO L186 Difference]: Start difference. First operand has 468 places, 527 transitions, 1062 flow. Second operand 3 states and 1481 transitions. [2022-07-22 21:30:01,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 490 transitions, 1022 flow [2022-07-22 21:30:01,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 490 transitions, 1022 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:30:01,791 INFO L242 Difference]: Finished difference. Result has 471 places, 485 transitions, 988 flow [2022-07-22 21:30:01,794 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=527, PETRI_DIFFERENCE_MINUEND_FLOW=976, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=988, PETRI_PLACES=471, PETRI_TRANSITIONS=485} [2022-07-22 21:30:01,799 INFO L279 CegarLoopForPetriNet]: 468 programPoint places, 3 predicate places. [2022-07-22 21:30:01,799 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 485 transitions, 988 flow [2022-07-22 21:30:01,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 474.0) internal successors, (1422), 3 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:01,805 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:30:01,805 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:30:01,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:30:01,806 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 37 more)] === [2022-07-22 21:30:01,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:30:01,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1537206534, now seen corresponding path program 1 times [2022-07-22 21:30:01,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:30:01,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281342727] [2022-07-22 21:30:01,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:30:01,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:30:01,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:30:01,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:30:01,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:30:01,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281342727] [2022-07-22 21:30:01,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281342727] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:30:01,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024009843] [2022-07-22 21:30:01,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:30:01,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:30:01,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:30:01,908 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:30:01,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:30:02,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:30:02,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 21:30:02,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:30:02,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:30:02,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:30:02,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:30:02,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024009843] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:30:02,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:30:02,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2022-07-22 21:30:02,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691793824] [2022-07-22 21:30:02,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:30:02,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 21:30:02,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:30:02,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 21:30:02,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:30:02,140 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 527 [2022-07-22 21:30:02,142 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 485 transitions, 988 flow. Second operand has 5 states, 5 states have (on average 476.2) internal successors, (2381), 5 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:02,143 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:30:02,143 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 527 [2022-07-22 21:30:02,143 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:30:02,292 INFO L129 PetriNetUnfolder]: 28/720 cut-off events. [2022-07-22 21:30:02,293 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-07-22 21:30:02,300 INFO L84 FinitePrefix]: Finished finitePrefix Result has 752 conditions, 720 events. 28/720 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2540 event pairs, 0 based on Foata normal form. 1/650 useless extension candidates. Maximal degree in co-relation 694. Up to 7 conditions per place. [2022-07-22 21:30:02,304 INFO L132 encePairwiseOnDemand]: 523/527 looper letters, 14 selfloop transitions, 4 changer transitions 0/491 dead transitions. [2022-07-22 21:30:02,304 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 491 transitions, 1036 flow [2022-07-22 21:30:02,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:30:02,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-22 21:30:02,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1911 transitions. [2022-07-22 21:30:02,310 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9065464895635673 [2022-07-22 21:30:02,311 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1911 transitions. [2022-07-22 21:30:02,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1911 transitions. [2022-07-22 21:30:02,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:30:02,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1911 transitions. [2022-07-22 21:30:02,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 477.75) internal successors, (1911), 4 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:02,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 527.0) internal successors, (2635), 5 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:02,321 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 527.0) internal successors, (2635), 5 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:02,321 INFO L186 Difference]: Start difference. First operand has 471 places, 485 transitions, 988 flow. Second operand 4 states and 1911 transitions. [2022-07-22 21:30:02,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 491 transitions, 1036 flow [2022-07-22 21:30:02,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 491 transitions, 1034 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:30:02,331 INFO L242 Difference]: Finished difference. Result has 475 places, 486 transitions, 1006 flow [2022-07-22 21:30:02,332 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=527, PETRI_DIFFERENCE_MINUEND_FLOW=986, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1006, PETRI_PLACES=475, PETRI_TRANSITIONS=486} [2022-07-22 21:30:02,332 INFO L279 CegarLoopForPetriNet]: 468 programPoint places, 7 predicate places. [2022-07-22 21:30:02,333 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 486 transitions, 1006 flow [2022-07-22 21:30:02,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 476.2) internal successors, (2381), 5 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:02,336 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:30:02,336 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:30:02,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 21:30:02,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:30:02,552 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 37 more)] === [2022-07-22 21:30:02,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:30:02,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1152918931, now seen corresponding path program 2 times [2022-07-22 21:30:02,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:30:02,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711352484] [2022-07-22 21:30:02,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:30:02,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:30:02,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:30:02,662 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:30:02,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:30:02,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711352484] [2022-07-22 21:30:02,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711352484] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:30:02,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:30:02,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:30:02,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339883173] [2022-07-22 21:30:02,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:30:02,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:30:02,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:30:02,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:30:02,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:30:02,667 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 476 out of 527 [2022-07-22 21:30:02,670 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 486 transitions, 1006 flow. Second operand has 4 states, 4 states have (on average 477.0) internal successors, (1908), 4 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:02,670 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:30:02,670 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 476 of 527 [2022-07-22 21:30:02,670 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:30:02,824 INFO L129 PetriNetUnfolder]: 28/718 cut-off events. [2022-07-22 21:30:02,824 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-07-22 21:30:02,832 INFO L84 FinitePrefix]: Finished finitePrefix Result has 749 conditions, 718 events. 28/718 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2537 event pairs, 0 based on Foata normal form. 0/648 useless extension candidates. Maximal degree in co-relation 681. Up to 5 conditions per place. [2022-07-22 21:30:02,837 INFO L132 encePairwiseOnDemand]: 524/527 looper letters, 5 selfloop transitions, 2 changer transitions 0/484 dead transitions. [2022-07-22 21:30:02,837 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 484 transitions, 1016 flow [2022-07-22 21:30:02,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:30:02,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-22 21:30:02,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1912 transitions. [2022-07-22 21:30:02,841 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9070208728652751 [2022-07-22 21:30:02,842 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1912 transitions. [2022-07-22 21:30:02,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1912 transitions. [2022-07-22 21:30:02,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:30:02,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1912 transitions. [2022-07-22 21:30:02,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 478.0) internal successors, (1912), 4 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:02,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 527.0) internal successors, (2635), 5 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:02,852 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 527.0) internal successors, (2635), 5 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:02,853 INFO L186 Difference]: Start difference. First operand has 475 places, 486 transitions, 1006 flow. Second operand 4 states and 1912 transitions. [2022-07-22 21:30:02,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 484 transitions, 1016 flow [2022-07-22 21:30:02,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 484 transitions, 1012 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-07-22 21:30:02,862 INFO L242 Difference]: Finished difference. Result has 475 places, 484 transitions, 1002 flow [2022-07-22 21:30:02,863 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=527, PETRI_DIFFERENCE_MINUEND_FLOW=998, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1002, PETRI_PLACES=475, PETRI_TRANSITIONS=484} [2022-07-22 21:30:02,864 INFO L279 CegarLoopForPetriNet]: 468 programPoint places, 7 predicate places. [2022-07-22 21:30:02,864 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 484 transitions, 1002 flow [2022-07-22 21:30:02,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 477.0) internal successors, (1908), 4 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:02,865 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:30:02,865 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:30:02,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:30:02,866 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 37 more)] === [2022-07-22 21:30:02,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:30:02,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1560813962, now seen corresponding path program 1 times [2022-07-22 21:30:02,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:30:02,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219454653] [2022-07-22 21:30:02,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:30:02,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:30:02,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:30:02,966 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:30:02,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:30:02,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219454653] [2022-07-22 21:30:02,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219454653] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:30:02,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699908244] [2022-07-22 21:30:02,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:30:02,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:30:02,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:30:02,969 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:30:02,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:30:03,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:30:03,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 21:30:03,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:30:03,146 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:30:03,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 21:30:03,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699908244] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:30:03,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 21:30:03,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-07-22 21:30:03,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789989780] [2022-07-22 21:30:03,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:30:03,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:30:03,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:30:03,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:30:03,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 21:30:03,151 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 475 out of 527 [2022-07-22 21:30:03,153 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 484 transitions, 1002 flow. Second operand has 4 states, 4 states have (on average 477.25) internal successors, (1909), 4 states have internal predecessors, (1909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:03,153 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:30:03,153 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 475 of 527 [2022-07-22 21:30:03,154 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:30:03,274 INFO L129 PetriNetUnfolder]: 28/713 cut-off events. [2022-07-22 21:30:03,274 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-22 21:30:03,283 INFO L84 FinitePrefix]: Finished finitePrefix Result has 747 conditions, 713 events. 28/713 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2501 event pairs, 0 based on Foata normal form. 0/644 useless extension candidates. Maximal degree in co-relation 679. Up to 5 conditions per place. [2022-07-22 21:30:03,287 INFO L132 encePairwiseOnDemand]: 523/527 looper letters, 7 selfloop transitions, 3 changer transitions 0/484 dead transitions. [2022-07-22 21:30:03,287 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 484 transitions, 1020 flow [2022-07-22 21:30:03,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:30:03,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-22 21:30:03,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1911 transitions. [2022-07-22 21:30:03,292 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9065464895635673 [2022-07-22 21:30:03,292 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1911 transitions. [2022-07-22 21:30:03,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1911 transitions. [2022-07-22 21:30:03,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:30:03,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1911 transitions. [2022-07-22 21:30:03,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 477.75) internal successors, (1911), 4 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:03,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 527.0) internal successors, (2635), 5 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:03,302 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 527.0) internal successors, (2635), 5 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:03,302 INFO L186 Difference]: Start difference. First operand has 475 places, 484 transitions, 1002 flow. Second operand 4 states and 1911 transitions. [2022-07-22 21:30:03,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 484 transitions, 1020 flow [2022-07-22 21:30:03,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 484 transitions, 1013 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:30:03,311 INFO L242 Difference]: Finished difference. Result has 475 places, 484 transitions, 1008 flow [2022-07-22 21:30:03,312 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=527, PETRI_DIFFERENCE_MINUEND_FLOW=991, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1008, PETRI_PLACES=475, PETRI_TRANSITIONS=484} [2022-07-22 21:30:03,312 INFO L279 CegarLoopForPetriNet]: 468 programPoint places, 7 predicate places. [2022-07-22 21:30:03,313 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 484 transitions, 1008 flow [2022-07-22 21:30:03,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 477.25) internal successors, (1909), 4 states have internal predecessors, (1909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:03,314 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:30:03,314 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:30:03,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 21:30:03,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-22 21:30:03,536 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting worker_fnErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 37 more)] === [2022-07-22 21:30:03,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:30:03,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1230433015, now seen corresponding path program 1 times [2022-07-22 21:30:03,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:30:03,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790002201] [2022-07-22 21:30:03,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:30:03,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:30:03,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:30:04,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:30:04,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:30:04,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790002201] [2022-07-22 21:30:04,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790002201] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:30:04,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:30:04,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-07-22 21:30:04,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173310803] [2022-07-22 21:30:04,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:30:04,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 21:30:04,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:30:04,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 21:30:04,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-07-22 21:30:04,494 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 364 out of 527 [2022-07-22 21:30:04,501 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 484 transitions, 1008 flow. Second operand has 17 states, 17 states have (on average 366.52941176470586) internal successors, (6231), 17 states have internal predecessors, (6231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:04,501 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:30:04,501 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 364 of 527 [2022-07-22 21:30:04,501 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:30:06,922 INFO L129 PetriNetUnfolder]: 2295/11734 cut-off events. [2022-07-22 21:30:06,923 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-22 21:30:06,955 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15607 conditions, 11734 events. 2295/11734 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 116558 event pairs, 976 based on Foata normal form. 0/10447 useless extension candidates. Maximal degree in co-relation 15508. Up to 2811 conditions per place. [2022-07-22 21:30:06,994 INFO L132 encePairwiseOnDemand]: 509/527 looper letters, 226 selfloop transitions, 21 changer transitions 0/611 dead transitions. [2022-07-22 21:30:06,994 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 611 transitions, 1756 flow [2022-07-22 21:30:06,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 21:30:06,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-22 21:30:07,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 5711 transitions. [2022-07-22 21:30:07,007 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7224541429475015 [2022-07-22 21:30:07,008 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 5711 transitions. [2022-07-22 21:30:07,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 5711 transitions. [2022-07-22 21:30:07,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:30:07,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 5711 transitions. [2022-07-22 21:30:07,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 380.73333333333335) internal successors, (5711), 15 states have internal predecessors, (5711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:07,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 527.0) internal successors, (8432), 16 states have internal predecessors, (8432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:07,037 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 527.0) internal successors, (8432), 16 states have internal predecessors, (8432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:07,037 INFO L186 Difference]: Start difference. First operand has 475 places, 484 transitions, 1008 flow. Second operand 15 states and 5711 transitions. [2022-07-22 21:30:07,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 611 transitions, 1756 flow [2022-07-22 21:30:07,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 611 transitions, 1755 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:30:07,048 INFO L242 Difference]: Finished difference. Result has 493 places, 495 transitions, 1113 flow [2022-07-22 21:30:07,049 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=527, PETRI_DIFFERENCE_MINUEND_FLOW=1007, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1113, PETRI_PLACES=493, PETRI_TRANSITIONS=495} [2022-07-22 21:30:07,050 INFO L279 CegarLoopForPetriNet]: 468 programPoint places, 25 predicate places. [2022-07-22 21:30:07,050 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 495 transitions, 1113 flow [2022-07-22 21:30:07,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 366.52941176470586) internal successors, (6231), 17 states have internal predecessors, (6231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:07,053 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:30:07,053 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:30:07,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 21:30:07,054 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 37 more)] === [2022-07-22 21:30:07,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:30:07,054 INFO L85 PathProgramCache]: Analyzing trace with hash -936078017, now seen corresponding path program 1 times [2022-07-22 21:30:07,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:30:07,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630213843] [2022-07-22 21:30:07,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:30:07,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:30:07,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:30:07,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:30:07,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:30:07,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630213843] [2022-07-22 21:30:07,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630213843] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:30:07,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:30:07,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:30:07,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641759617] [2022-07-22 21:30:07,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:30:07,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:30:07,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:30:07,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:30:07,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:30:07,101 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 475 out of 527 [2022-07-22 21:30:07,102 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 495 transitions, 1113 flow. Second operand has 3 states, 3 states have (on average 476.0) internal successors, (1428), 3 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:07,103 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:30:07,103 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 475 of 527 [2022-07-22 21:30:07,103 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:30:07,326 INFO L129 PetriNetUnfolder]: 65/1426 cut-off events. [2022-07-22 21:30:07,327 INFO L130 PetriNetUnfolder]: For 28/30 co-relation queries the response was YES. [2022-07-22 21:30:07,338 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1529 conditions, 1426 events. 65/1426 cut-off events. For 28/30 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 8022 event pairs, 0 based on Foata normal form. 1/1281 useless extension candidates. Maximal degree in co-relation 1476. Up to 12 conditions per place. [2022-07-22 21:30:07,342 INFO L132 encePairwiseOnDemand]: 524/527 looper letters, 7 selfloop transitions, 2 changer transitions 0/494 dead transitions. [2022-07-22 21:30:07,343 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 494 transitions, 1125 flow [2022-07-22 21:30:07,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:30:07,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:30:07,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1435 transitions. [2022-07-22 21:30:07,346 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9076533839342188 [2022-07-22 21:30:07,346 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1435 transitions. [2022-07-22 21:30:07,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1435 transitions. [2022-07-22 21:30:07,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:30:07,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1435 transitions. [2022-07-22 21:30:07,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 478.3333333333333) internal successors, (1435), 3 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:07,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 527.0) internal successors, (2108), 4 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:07,353 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 527.0) internal successors, (2108), 4 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:07,353 INFO L186 Difference]: Start difference. First operand has 493 places, 495 transitions, 1113 flow. Second operand 3 states and 1435 transitions. [2022-07-22 21:30:07,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 494 transitions, 1125 flow [2022-07-22 21:30:07,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 494 transitions, 1106 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-07-22 21:30:07,362 INFO L242 Difference]: Finished difference. Result has 486 places, 494 transitions, 1092 flow [2022-07-22 21:30:07,363 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=527, PETRI_DIFFERENCE_MINUEND_FLOW=1088, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1092, PETRI_PLACES=486, PETRI_TRANSITIONS=494} [2022-07-22 21:30:07,364 INFO L279 CegarLoopForPetriNet]: 468 programPoint places, 18 predicate places. [2022-07-22 21:30:07,364 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 494 transitions, 1092 flow [2022-07-22 21:30:07,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 476.0) internal successors, (1428), 3 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:07,365 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:30:07,365 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:30:07,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 21:30:07,365 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting worker_fnErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 37 more)] === [2022-07-22 21:30:07,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:30:07,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1718239257, now seen corresponding path program 1 times [2022-07-22 21:30:07,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:30:07,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149676575] [2022-07-22 21:30:07,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:30:07,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:30:07,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:30:08,004 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:30:08,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:30:08,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149676575] [2022-07-22 21:30:08,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149676575] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:30:08,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:30:08,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-07-22 21:30:08,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968314338] [2022-07-22 21:30:08,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:30:08,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 21:30:08,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:30:08,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 21:30:08,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-07-22 21:30:08,011 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 364 out of 527 [2022-07-22 21:30:08,015 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 494 transitions, 1092 flow. Second operand has 17 states, 17 states have (on average 366.5882352941176) internal successors, (6232), 17 states have internal predecessors, (6232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:08,015 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:30:08,016 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 364 of 527 [2022-07-22 21:30:08,016 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:30:10,374 INFO L129 PetriNetUnfolder]: 2409/12298 cut-off events. [2022-07-22 21:30:10,375 INFO L130 PetriNetUnfolder]: For 492/492 co-relation queries the response was YES. [2022-07-22 21:30:10,406 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16806 conditions, 12298 events. 2409/12298 cut-off events. For 492/492 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 122021 event pairs, 1016 based on Foata normal form. 0/11024 useless extension candidates. Maximal degree in co-relation 16701. Up to 2929 conditions per place. [2022-07-22 21:30:10,437 INFO L132 encePairwiseOnDemand]: 510/527 looper letters, 226 selfloop transitions, 23 changer transitions 0/615 dead transitions. [2022-07-22 21:30:10,438 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 615 transitions, 1852 flow [2022-07-22 21:30:10,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 21:30:10,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-22 21:30:10,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 5710 transitions. [2022-07-22 21:30:10,450 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7223276407337128 [2022-07-22 21:30:10,450 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 5710 transitions. [2022-07-22 21:30:10,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 5710 transitions. [2022-07-22 21:30:10,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:30:10,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 5710 transitions. [2022-07-22 21:30:10,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 380.6666666666667) internal successors, (5710), 15 states have internal predecessors, (5710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:10,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 527.0) internal successors, (8432), 16 states have internal predecessors, (8432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:10,474 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 527.0) internal successors, (8432), 16 states have internal predecessors, (8432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:10,474 INFO L186 Difference]: Start difference. First operand has 486 places, 494 transitions, 1092 flow. Second operand 15 states and 5710 transitions. [2022-07-22 21:30:10,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 615 transitions, 1852 flow [2022-07-22 21:30:10,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 615 transitions, 1848 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-22 21:30:10,487 INFO L242 Difference]: Finished difference. Result has 502 places, 500 transitions, 1178 flow [2022-07-22 21:30:10,488 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=527, PETRI_DIFFERENCE_MINUEND_FLOW=1088, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1178, PETRI_PLACES=502, PETRI_TRANSITIONS=500} [2022-07-22 21:30:10,488 INFO L279 CegarLoopForPetriNet]: 468 programPoint places, 34 predicate places. [2022-07-22 21:30:10,488 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 500 transitions, 1178 flow [2022-07-22 21:30:10,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 366.5882352941176) internal successors, (6232), 17 states have internal predecessors, (6232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:10,490 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:30:10,491 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:30:10,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 21:30:10,491 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting worker_fnErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 37 more)] === [2022-07-22 21:30:10,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:30:10,492 INFO L85 PathProgramCache]: Analyzing trace with hash 751469111, now seen corresponding path program 1 times [2022-07-22 21:30:10,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:30:10,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877658909] [2022-07-22 21:30:10,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:30:10,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:30:10,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:30:11,281 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:30:11,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:30:11,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877658909] [2022-07-22 21:30:11,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877658909] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:30:11,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773505803] [2022-07-22 21:30:11,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:30:11,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:30:11,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:30:11,284 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:30:11,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 21:30:11,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:30:11,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-22 21:30:11,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:30:11,790 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-22 21:30:11,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-22 21:30:11,885 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-22 21:30:11,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-22 21:30:11,992 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:30:12,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:30:12,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:30:12,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:30:12,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:30:12,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:30:12,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:30:12,395 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:30:12,441 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 21:30:12,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-22 21:30:12,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:30:12,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:30:12,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:30:12,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-07-22 21:30:12,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 21:30:12,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:30:13,052 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_570 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_~#pre~0.base| v_ArrVal_570) |c_~#in~0.base|))) (or (not (<= (mod (select .cse0 |c_~#in~0.offset|) 256) 0)) (= (mod (select .cse0 (+ |c_~#in~0.offset| 1)) 256) 0)))) is different from false [2022-07-22 21:30:13,133 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_569 (Array Int Int)) (v_ArrVal_570 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#worker~0#1.base| v_ArrVal_569) |c_~#pre~0.base| v_ArrVal_570) |c_~#in~0.base|))) (or (= (mod (select .cse0 (+ |c_~#in~0.offset| 1)) 256) 0) (not (<= (mod (select .cse0 |c_~#in~0.offset|) 256) 0))))) is different from false [2022-07-22 21:30:14,621 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-22 21:30:14,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 594 treesize of output 574 [2022-07-22 21:30:14,653 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-22 21:30:14,653 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 543 treesize of output 495 [2022-07-22 21:30:14,667 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-22 21:30:14,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 495 treesize of output 483 [2022-07-22 21:30:14,681 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-22 21:30:14,681 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 483 treesize of output 459 [2022-07-22 21:30:14,696 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-22 21:30:14,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 354 treesize of output 348 [2022-07-22 21:30:15,249 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:30:15,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 220 treesize of output 372 [2022-07-22 21:30:15,919 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 21:30:15,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773505803] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:30:15,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:30:15,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 21] total 52 [2022-07-22 21:30:15,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174437571] [2022-07-22 21:30:15,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:30:15,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-22 21:30:15,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:30:15,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-22 21:30:15,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=2014, Unknown=47, NotChecked=194, Total=2652 [2022-07-22 21:30:15,958 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 364 out of 527 [2022-07-22 21:30:15,974 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 500 transitions, 1178 flow. Second operand has 52 states, 52 states have (on average 366.63461538461536) internal successors, (19065), 52 states have internal predecessors, (19065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:15,974 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:30:15,974 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 364 of 527 [2022-07-22 21:30:15,974 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:30:19,615 INFO L129 PetriNetUnfolder]: 2588/13083 cut-off events. [2022-07-22 21:30:19,615 INFO L130 PetriNetUnfolder]: For 1614/1616 co-relation queries the response was YES. [2022-07-22 21:30:19,654 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18642 conditions, 13083 events. 2588/13083 cut-off events. For 1614/1616 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 134299 event pairs, 745 based on Foata normal form. 54/11912 useless extension candidates. Maximal degree in co-relation 18527. Up to 2829 conditions per place. [2022-07-22 21:30:19,687 INFO L132 encePairwiseOnDemand]: 501/527 looper letters, 329 selfloop transitions, 57 changer transitions 0/752 dead transitions. [2022-07-22 21:30:19,687 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 752 transitions, 2535 flow [2022-07-22 21:30:19,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-22 21:30:19,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-07-22 21:30:19,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 9485 transitions. [2022-07-22 21:30:19,707 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7199240986717268 [2022-07-22 21:30:19,707 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 9485 transitions. [2022-07-22 21:30:19,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 9485 transitions. [2022-07-22 21:30:19,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:30:19,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 9485 transitions. [2022-07-22 21:30:19,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 379.4) internal successors, (9485), 25 states have internal predecessors, (9485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:19,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 527.0) internal successors, (13702), 26 states have internal predecessors, (13702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:19,745 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 527.0) internal successors, (13702), 26 states have internal predecessors, (13702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:19,746 INFO L186 Difference]: Start difference. First operand has 502 places, 500 transitions, 1178 flow. Second operand 25 states and 9485 transitions. [2022-07-22 21:30:19,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 752 transitions, 2535 flow [2022-07-22 21:30:19,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 752 transitions, 2505 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-07-22 21:30:19,761 INFO L242 Difference]: Finished difference. Result has 524 places, 531 transitions, 1495 flow [2022-07-22 21:30:19,762 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=527, PETRI_DIFFERENCE_MINUEND_FLOW=1155, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1495, PETRI_PLACES=524, PETRI_TRANSITIONS=531} [2022-07-22 21:30:19,764 INFO L279 CegarLoopForPetriNet]: 468 programPoint places, 56 predicate places. [2022-07-22 21:30:19,764 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 531 transitions, 1495 flow [2022-07-22 21:30:19,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 366.63461538461536) internal successors, (19065), 52 states have internal predecessors, (19065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:19,769 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:30:19,770 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:30:19,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 21:30:19,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:30:19,997 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 37 more)] === [2022-07-22 21:30:19,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:30:19,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1186418847, now seen corresponding path program 1 times [2022-07-22 21:30:19,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:30:19,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756094099] [2022-07-22 21:30:19,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:30:19,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:30:20,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:30:20,567 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:30:20,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:30:20,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756094099] [2022-07-22 21:30:20,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756094099] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:30:20,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767221137] [2022-07-22 21:30:20,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:30:20,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:30:20,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:30:20,568 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:30:20,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 21:30:20,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:30:20,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-22 21:30:20,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:30:20,940 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-22 21:30:20,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-22 21:30:21,025 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-22 21:30:21,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2022-07-22 21:30:21,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-22 21:30:21,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-22 21:30:21,141 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-22 21:30:21,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-22 21:30:21,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-22 21:30:21,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-22 21:30:21,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-22 21:30:21,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-22 21:30:21,540 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-22 21:30:21,540 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-07-22 21:30:21,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-22 21:30:21,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:30:21,716 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-22 21:30:21,743 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-22 21:30:21,746 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 21:30:21,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:30:21,788 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_719 (Array Int Int))) (= (mod (select (select (store |c_#memory_int| |c_~#pre~0.base| v_ArrVal_719) |c_~#in~0.base|) |c_~#in~0.offset|) 256) 0)) is different from false [2022-07-22 21:30:21,821 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_719 (Array Int Int)) (v_ArrVal_718 (Array Int Int))) (= (mod (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#worker~0#1.base| v_ArrVal_718) |c_~#pre~0.base| v_ArrVal_719) |c_~#in~0.base|) |c_~#in~0.offset|) 256) 0)) is different from false [2022-07-22 21:30:22,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4382 treesize of output 4314 [2022-07-22 21:30:22,816 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4150 treesize of output 4022 [2022-07-22 21:30:22,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4022 treesize of output 3990 [2022-07-22 21:30:22,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3990 treesize of output 3926 [2022-07-22 21:30:22,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3926 treesize of output 3670 [2022-07-22 21:30:27,347 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:30:27,347 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 212 treesize of output 362 [2022-07-22 21:30:28,318 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 1 not checked. [2022-07-22 21:30:28,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767221137] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:30:28,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:30:28,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17] total 42 [2022-07-22 21:30:28,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418109283] [2022-07-22 21:30:28,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:30:28,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-22 21:30:28,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:30:28,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-22 21:30:28,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=1212, Unknown=32, NotChecked=154, Total=1722 [2022-07-22 21:30:28,328 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 363 out of 527 [2022-07-22 21:30:28,336 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 531 transitions, 1495 flow. Second operand has 42 states, 42 states have (on average 365.8333333333333) internal successors, (15365), 42 states have internal predecessors, (15365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:28,337 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:30:28,337 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 363 of 527 [2022-07-22 21:30:28,337 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:30:31,044 INFO L129 PetriNetUnfolder]: 2709/14394 cut-off events. [2022-07-22 21:30:31,044 INFO L130 PetriNetUnfolder]: For 3323/3419 co-relation queries the response was YES. [2022-07-22 21:30:31,075 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20889 conditions, 14394 events. 2709/14394 cut-off events. For 3323/3419 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 150959 event pairs, 1143 based on Foata normal form. 46/12857 useless extension candidates. Maximal degree in co-relation 20763. Up to 3386 conditions per place. [2022-07-22 21:30:31,106 INFO L132 encePairwiseOnDemand]: 508/527 looper letters, 256 selfloop transitions, 36 changer transitions 0/673 dead transitions. [2022-07-22 21:30:31,107 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 673 transitions, 2452 flow [2022-07-22 21:30:31,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 21:30:31,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-22 21:30:31,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 6071 transitions. [2022-07-22 21:30:31,117 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7199952561669829 [2022-07-22 21:30:31,118 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 6071 transitions. [2022-07-22 21:30:31,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 6071 transitions. [2022-07-22 21:30:31,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:30:31,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 6071 transitions. [2022-07-22 21:30:31,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 379.4375) internal successors, (6071), 16 states have internal predecessors, (6071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:31,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 527.0) internal successors, (8959), 17 states have internal predecessors, (8959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:31,140 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 527.0) internal successors, (8959), 17 states have internal predecessors, (8959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:31,140 INFO L186 Difference]: Start difference. First operand has 524 places, 531 transitions, 1495 flow. Second operand 16 states and 6071 transitions. [2022-07-22 21:30:31,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 673 transitions, 2452 flow [2022-07-22 21:30:31,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 673 transitions, 2351 flow, removed 27 selfloop flow, removed 12 redundant places. [2022-07-22 21:30:31,163 INFO L242 Difference]: Finished difference. Result has 532 places, 542 transitions, 1587 flow [2022-07-22 21:30:31,163 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=527, PETRI_DIFFERENCE_MINUEND_FLOW=1412, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1587, PETRI_PLACES=532, PETRI_TRANSITIONS=542} [2022-07-22 21:30:31,164 INFO L279 CegarLoopForPetriNet]: 468 programPoint places, 64 predicate places. [2022-07-22 21:30:31,164 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 542 transitions, 1587 flow [2022-07-22 21:30:31,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 365.8333333333333) internal successors, (15365), 42 states have internal predecessors, (15365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:31,168 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:30:31,168 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:30:31,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-22 21:30:31,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:30:31,392 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting worker_fnErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 37 more)] === [2022-07-22 21:30:31,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:30:31,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1649056811, now seen corresponding path program 1 times [2022-07-22 21:30:31,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:30:31,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327494054] [2022-07-22 21:30:31,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:30:31,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:30:31,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:30:32,153 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:30:32,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:30:32,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327494054] [2022-07-22 21:30:32,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327494054] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:30:32,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749264491] [2022-07-22 21:30:32,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:30:32,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:30:32,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:30:32,157 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:30:32,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 21:30:32,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:30:32,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-22 21:30:32,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:30:32,532 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-22 21:30:32,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-22 21:30:32,590 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-22 21:30:32,590 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-22 21:30:32,651 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:30:32,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:30:32,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:30:32,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:30:32,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:30:32,777 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:30:32,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:30:32,967 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:30:33,004 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 21:30:33,007 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-22 21:30:33,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:30:33,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:30:33,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:30:33,358 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-07-22 21:30:33,361 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 21:30:33,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:30:33,557 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_867 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_~#pre~0.base| v_ArrVal_867) |c_~#post~0.base|))) (or (not (<= (mod (select .cse0 |c_~#post~0.offset|) 256) 0)) (= (mod (select .cse0 (+ |c_~#post~0.offset| 1)) 256) 0)))) is different from false [2022-07-22 21:30:33,591 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_867 (Array Int Int)) (v_ArrVal_866 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#worker~0#1.base| v_ArrVal_866) |c_~#pre~0.base| v_ArrVal_867) |c_~#post~0.base|))) (or (not (<= (mod (select .cse0 |c_~#post~0.offset|) 256) 0)) (= (mod (select .cse0 (+ |c_~#post~0.offset| 1)) 256) 0)))) is different from false [2022-07-22 21:30:34,922 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-22 21:30:34,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1190 treesize of output 1160 [2022-07-22 21:30:34,957 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-22 21:30:34,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1106 treesize of output 1010 [2022-07-22 21:30:34,970 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-22 21:30:34,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1010 treesize of output 962 [2022-07-22 21:30:34,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 21:30:34,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 739 treesize of output 727 [2022-07-22 21:30:34,990 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-22 21:30:34,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 950 treesize of output 926 [2022-07-22 21:30:35,586 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:30:35,587 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 93 treesize of output 163 [2022-07-22 21:30:35,872 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 21:30:35,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749264491] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:30:35,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:30:35,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 21] total 53 [2022-07-22 21:30:35,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617813655] [2022-07-22 21:30:35,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:30:35,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-22 21:30:35,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:30:35,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-22 21:30:35,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=2146, Unknown=43, NotChecked=198, Total=2756 [2022-07-22 21:30:35,881 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 364 out of 527 [2022-07-22 21:30:35,892 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 542 transitions, 1587 flow. Second operand has 53 states, 53 states have (on average 366.64150943396226) internal successors, (19432), 53 states have internal predecessors, (19432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:35,892 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:30:35,892 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 364 of 527 [2022-07-22 21:30:35,892 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:30:39,596 INFO L129 PetriNetUnfolder]: 2767/14414 cut-off events. [2022-07-22 21:30:39,597 INFO L130 PetriNetUnfolder]: For 4501/4640 co-relation queries the response was YES. [2022-07-22 21:30:39,644 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21946 conditions, 14414 events. 2767/14414 cut-off events. For 4501/4640 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 150806 event pairs, 845 based on Foata normal form. 99/13154 useless extension candidates. Maximal degree in co-relation 21892. Up to 3065 conditions per place. [2022-07-22 21:30:39,808 INFO L132 encePairwiseOnDemand]: 500/527 looper letters, 339 selfloop transitions, 65 changer transitions 0/784 dead transitions. [2022-07-22 21:30:39,808 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 784 transitions, 3065 flow [2022-07-22 21:30:39,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-22 21:30:39,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-07-22 21:30:39,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 10212 transitions. [2022-07-22 21:30:39,824 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7176892262281257 [2022-07-22 21:30:39,824 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 10212 transitions. [2022-07-22 21:30:39,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 10212 transitions. [2022-07-22 21:30:39,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:30:39,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 10212 transitions. [2022-07-22 21:30:39,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 378.22222222222223) internal successors, (10212), 27 states have internal predecessors, (10212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:39,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 527.0) internal successors, (14756), 28 states have internal predecessors, (14756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:39,859 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 527.0) internal successors, (14756), 28 states have internal predecessors, (14756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:39,859 INFO L186 Difference]: Start difference. First operand has 532 places, 542 transitions, 1587 flow. Second operand 27 states and 10212 transitions. [2022-07-22 21:30:39,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 784 transitions, 3065 flow [2022-07-22 21:30:39,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 550 places, 784 transitions, 3040 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-07-22 21:30:39,886 INFO L242 Difference]: Finished difference. Result has 554 places, 559 transitions, 1892 flow [2022-07-22 21:30:39,887 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=527, PETRI_DIFFERENCE_MINUEND_FLOW=1565, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1892, PETRI_PLACES=554, PETRI_TRANSITIONS=559} [2022-07-22 21:30:39,888 INFO L279 CegarLoopForPetriNet]: 468 programPoint places, 86 predicate places. [2022-07-22 21:30:39,888 INFO L495 AbstractCegarLoop]: Abstraction has has 554 places, 559 transitions, 1892 flow [2022-07-22 21:30:39,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 366.64150943396226) internal successors, (19432), 53 states have internal predecessors, (19432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:39,892 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:30:39,892 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:30:39,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 21:30:40,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-22 21:30:40,117 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 37 more)] === [2022-07-22 21:30:40,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:30:40,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1326972318, now seen corresponding path program 1 times [2022-07-22 21:30:40,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:30:40,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054848310] [2022-07-22 21:30:40,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:30:40,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:30:40,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:30:40,735 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:30:40,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:30:40,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054848310] [2022-07-22 21:30:40,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054848310] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:30:40,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214998930] [2022-07-22 21:30:40,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:30:40,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:30:40,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:30:40,737 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:30:40,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 21:30:40,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:30:40,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-22 21:30:40,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:30:41,308 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-22 21:30:41,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2022-07-22 21:30:41,406 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-07-22 21:30:41,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 45 [2022-07-22 21:30:41,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-07-22 21:30:41,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-07-22 21:30:41,596 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-07-22 21:30:41,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-07-22 21:30:41,776 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-07-22 21:30:41,807 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-07-22 21:30:42,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-07-22 21:30:42,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-07-22 21:30:42,252 INFO L356 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-07-22 21:30:42,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2022-07-22 21:30:42,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-07-22 21:30:42,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:30:42,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:30:42,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-07-22 21:30:42,775 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-07-22 21:30:42,778 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 21:30:42,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:30:44,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 21:30:44,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 21:30:44,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 21:30:44,552 INFO L356 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-07-22 21:30:44,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1192 treesize of output 1164 [2022-07-22 21:30:44,600 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:30:44,600 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1090 treesize of output 1032 [2022-07-22 21:30:44,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1018 treesize of output 1010 [2022-07-22 21:30:44,640 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1010 treesize of output 978 [2022-07-22 21:30:44,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 978 treesize of output 962 [2022-07-22 21:30:45,147 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:30:45,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 27 case distinctions, treesize of input 128 treesize of output 328 [2022-07-22 21:30:45,799 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 21:30:45,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214998930] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:30:45,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:30:45,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 22] total 55 [2022-07-22 21:30:45,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324178131] [2022-07-22 21:30:45,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:30:45,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-07-22 21:30:45,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:30:45,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-07-22 21:30:45,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=2381, Unknown=70, NotChecked=0, Total=2970 [2022-07-22 21:30:45,813 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 359 out of 527 [2022-07-22 21:30:45,825 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 554 places, 559 transitions, 1892 flow. Second operand has 55 states, 55 states have (on average 361.43636363636364) internal successors, (19879), 55 states have internal predecessors, (19879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:45,825 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:30:45,825 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 359 of 527 [2022-07-22 21:30:45,825 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:30:49,297 INFO L129 PetriNetUnfolder]: 2930/15605 cut-off events. [2022-07-22 21:30:49,297 INFO L130 PetriNetUnfolder]: For 7146/7276 co-relation queries the response was YES. [2022-07-22 21:30:49,352 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23929 conditions, 15605 events. 2930/15605 cut-off events. For 7146/7276 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 167311 event pairs, 1209 based on Foata normal form. 63/14041 useless extension candidates. Maximal degree in co-relation 23870. Up to 3669 conditions per place. [2022-07-22 21:30:49,382 INFO L132 encePairwiseOnDemand]: 499/527 looper letters, 303 selfloop transitions, 54 changer transitions 0/741 dead transitions. [2022-07-22 21:30:49,382 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 741 transitions, 3125 flow [2022-07-22 21:30:49,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-22 21:30:49,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-07-22 21:30:49,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 8568 transitions. [2022-07-22 21:30:49,391 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7068723702664796 [2022-07-22 21:30:49,391 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 8568 transitions. [2022-07-22 21:30:49,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 8568 transitions. [2022-07-22 21:30:49,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:30:49,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 8568 transitions. [2022-07-22 21:30:49,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 372.5217391304348) internal successors, (8568), 23 states have internal predecessors, (8568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:49,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 527.0) internal successors, (12648), 24 states have internal predecessors, (12648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:49,413 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 527.0) internal successors, (12648), 24 states have internal predecessors, (12648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:49,413 INFO L186 Difference]: Start difference. First operand has 554 places, 559 transitions, 1892 flow. Second operand 23 states and 8568 transitions. [2022-07-22 21:30:49,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 741 transitions, 3125 flow [2022-07-22 21:30:49,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 559 places, 741 transitions, 2985 flow, removed 35 selfloop flow, removed 17 redundant places. [2022-07-22 21:30:49,442 INFO L242 Difference]: Finished difference. Result has 565 places, 573 transitions, 2041 flow [2022-07-22 21:30:49,443 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=527, PETRI_DIFFERENCE_MINUEND_FLOW=1780, PETRI_DIFFERENCE_MINUEND_PLACES=537, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2041, PETRI_PLACES=565, PETRI_TRANSITIONS=573} [2022-07-22 21:30:49,443 INFO L279 CegarLoopForPetriNet]: 468 programPoint places, 97 predicate places. [2022-07-22 21:30:49,443 INFO L495 AbstractCegarLoop]: Abstraction has has 565 places, 573 transitions, 2041 flow [2022-07-22 21:30:49,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 361.43636363636364) internal successors, (19879), 55 states have internal predecessors, (19879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:30:49,445 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:30:49,446 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:30:49,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-22 21:30:49,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:30:49,647 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 37 more)] === [2022-07-22 21:30:49,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:30:49,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1295445784, now seen corresponding path program 1 times [2022-07-22 21:30:49,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:30:49,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289130773] [2022-07-22 21:30:49,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:30:49,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:30:49,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:30:50,320 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:30:50,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:30:50,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289130773] [2022-07-22 21:30:50,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289130773] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:30:50,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628386614] [2022-07-22 21:30:50,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:30:50,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:30:50,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:30:50,321 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:30:50,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 21:30:50,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:30:50,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-22 21:30:50,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:30:50,702 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-22 21:30:50,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-22 21:30:50,759 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-22 21:30:50,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-22 21:30:50,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:30:50,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:30:50,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:30:50,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:30:50,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:30:50,944 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:30:51,114 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:30:51,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:30:51,160 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 21:30:51,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-22 21:30:51,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:30:51,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:30:51,359 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:30:51,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-07-22 21:30:51,565 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 21:30:51,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:30:51,731 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1163 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_~#pre~0.base| v_ArrVal_1163) |c_~#in~0.base|))) (or (= (mod (select .cse0 (+ |c_~#in~0.offset| 1)) 256) 0) (not (<= (mod (select .cse0 |c_~#in~0.offset|) 256) 0))))) is different from false [2022-07-22 21:30:51,797 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1163 (Array Int Int)) (v_ArrVal_1162 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#worker~0#1.base| v_ArrVal_1162) |c_~#pre~0.base| v_ArrVal_1163) |c_~#in~0.base|))) (or (not (<= (mod (select .cse0 |c_~#in~0.offset|) 256) 0)) (= (mod (select .cse0 (+ |c_~#in~0.offset| 1)) 256) 0)))) is different from false [2022-07-22 21:30:52,901 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-22 21:30:52,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2382 treesize of output 2332 [2022-07-22 21:30:52,951 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-22 21:30:52,952 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2232 treesize of output 2184 [2022-07-22 21:30:53,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 21:30:53,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 1626 treesize of output 1530 [2022-07-22 21:30:53,045 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-22 21:30:53,046 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2088 treesize of output 2064 [2022-07-22 21:30:53,060 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-22 21:30:53,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2064 treesize of output 1872 [2022-07-22 21:32:00,388 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:32:00,388 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 162 treesize of output 316 [2022-07-22 21:32:00,726 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 1 not checked. [2022-07-22 21:32:00,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628386614] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:32:00,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:32:00,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 21] total 53 [2022-07-22 21:32:00,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132120827] [2022-07-22 21:32:00,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:32:00,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-22 21:32:00,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:32:00,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-22 21:32:00,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=2091, Unknown=46, NotChecked=198, Total=2756 [2022-07-22 21:32:00,735 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 363 out of 527 [2022-07-22 21:32:00,742 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 573 transitions, 2041 flow. Second operand has 53 states, 53 states have (on average 365.6981132075472) internal successors, (19382), 53 states have internal predecessors, (19382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:00,743 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:32:00,743 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 363 of 527 [2022-07-22 21:32:00,743 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:32:04,093 INFO L129 PetriNetUnfolder]: 2769/15484 cut-off events. [2022-07-22 21:32:04,093 INFO L130 PetriNetUnfolder]: For 7312/7434 co-relation queries the response was YES. [2022-07-22 21:32:04,183 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24094 conditions, 15484 events. 2769/15484 cut-off events. For 7312/7434 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 166028 event pairs, 1137 based on Foata normal form. 105/14104 useless extension candidates. Maximal degree in co-relation 24028. Up to 3875 conditions per place. [2022-07-22 21:32:04,216 INFO L132 encePairwiseOnDemand]: 501/527 looper letters, 294 selfloop transitions, 53 changer transitions 0/740 dead transitions. [2022-07-22 21:32:04,216 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 740 transitions, 3205 flow [2022-07-22 21:32:04,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 21:32:04,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-07-22 21:32:04,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 8285 transitions. [2022-07-22 21:32:04,225 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7145937553907193 [2022-07-22 21:32:04,225 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 8285 transitions. [2022-07-22 21:32:04,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 8285 transitions. [2022-07-22 21:32:04,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:32:04,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 8285 transitions. [2022-07-22 21:32:04,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 376.59090909090907) internal successors, (8285), 22 states have internal predecessors, (8285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:04,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 527.0) internal successors, (12121), 23 states have internal predecessors, (12121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:04,245 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 527.0) internal successors, (12121), 23 states have internal predecessors, (12121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:04,245 INFO L186 Difference]: Start difference. First operand has 565 places, 573 transitions, 2041 flow. Second operand 22 states and 8285 transitions. [2022-07-22 21:32:04,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 740 transitions, 3205 flow [2022-07-22 21:32:04,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 740 transitions, 3158 flow, removed 1 selfloop flow, removed 15 redundant places. [2022-07-22 21:32:04,279 INFO L242 Difference]: Finished difference. Result has 575 places, 588 transitions, 2276 flow [2022-07-22 21:32:04,279 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=527, PETRI_DIFFERENCE_MINUEND_FLOW=1967, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2276, PETRI_PLACES=575, PETRI_TRANSITIONS=588} [2022-07-22 21:32:04,280 INFO L279 CegarLoopForPetriNet]: 468 programPoint places, 107 predicate places. [2022-07-22 21:32:04,280 INFO L495 AbstractCegarLoop]: Abstraction has has 575 places, 588 transitions, 2276 flow [2022-07-22 21:32:04,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 365.6981132075472) internal successors, (19382), 53 states have internal predecessors, (19382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:32:04,282 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:32:04,283 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:32:04,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 21:32:04,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:32:04,495 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 37 more)] === [2022-07-22 21:32:04,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:32:04,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1941790587, now seen corresponding path program 1 times [2022-07-22 21:32:04,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:32:04,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488648004] [2022-07-22 21:32:04,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:32:04,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:32:04,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:32:05,193 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 21:32:05,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:32:05,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488648004] [2022-07-22 21:32:05,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488648004] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:32:05,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393831753] [2022-07-22 21:32:05,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:32:05,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:32:05,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:32:05,195 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:32:05,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 21:32:05,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:32:05,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-22 21:32:05,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:32:05,556 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-22 21:32:05,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-22 21:32:05,615 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-22 21:32:05,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-22 21:32:05,681 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:32:05,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:32:05,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:32:05,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:32:05,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:32:05,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:32:05,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:32:05,977 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:32:06,017 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 21:32:06,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-22 21:32:06,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:32:06,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:32:06,215 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:32:06,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-07-22 21:32:06,418 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 21:32:06,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:32:06,590 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1312 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_~#pre~0.base| v_ArrVal_1312) |c_~#post~0.base|))) (or (= (mod (select .cse0 (+ |c_~#post~0.offset| 1)) 256) 0) (not (<= (mod (select .cse0 |c_~#post~0.offset|) 256) 0))))) is different from false [2022-07-22 21:32:06,649 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1312 (Array Int Int)) (v_ArrVal_1311 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#worker~0#1.base| v_ArrVal_1311) |c_~#pre~0.base| v_ArrVal_1312) |c_~#post~0.base|))) (or (= (mod (select .cse0 (+ |c_~#post~0.offset| 1)) 256) 0) (not (<= (mod (select .cse0 |c_~#post~0.offset|) 256) 0))))) is different from false [2022-07-22 21:32:07,660 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-22 21:32:07,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9534 treesize of output 9364 [2022-07-22 21:32:07,908 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-22 21:32:07,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8988 treesize of output 8892 [2022-07-22 21:32:07,956 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-22 21:32:07,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8892 treesize of output 8124 [2022-07-22 21:32:08,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 21:32:08,009 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 6226 treesize of output 5842 [2022-07-22 21:32:08,067 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-22 21:32:08,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7740 treesize of output 7548