./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 eb692b52 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-?-eb692b5 [2022-07-19 21:14:58,423 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:14:58,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:14:58,454 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:14:58,456 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:14:58,457 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:14:58,460 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:14:58,464 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:14:58,466 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:14:58,469 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:14:58,470 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:14:58,472 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:14:58,472 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:14:58,474 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:14:58,475 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:14:58,476 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:14:58,477 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:14:58,478 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:14:58,480 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:14:58,485 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:14:58,486 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:14:58,487 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:14:58,487 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:14:58,488 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:14:58,489 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:14:58,494 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:14:58,494 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:14:58,495 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:14:58,496 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:14:58,496 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:14:58,497 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:14:58,498 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:14:58,499 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:14:58,499 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:14:58,500 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:14:58,500 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:14:58,501 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:14:58,501 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:14:58,501 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:14:58,501 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:14:58,502 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:14:58,503 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:14:58,504 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:14:58,531 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:14:58,531 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:14:58,531 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:14:58,531 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:14:58,532 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:14:58,532 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:14:58,533 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:14:58,533 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:14:58,533 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:14:58,533 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:14:58,534 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:14:58,534 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:14:58,534 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:14:58,534 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:14:58,534 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:14:58,534 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:14:58,534 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:14:58,534 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:14:58,535 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:14:58,536 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:14:58,536 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:14:58,536 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:14:58,536 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:14:58,536 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:14:58,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:14:58,536 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:14:58,537 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:14:58,537 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:14:58,537 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:14:58,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:14:58,537 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:14:58,538 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:14:58,538 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:14:58,538 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 16b049fb81e05ec2192b5dc6cabf7c8b89c1486d4e623332a0a01a89383c6c7d [2022-07-19 21:14:58,712 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:14:58,733 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:14:58,735 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:14:58,736 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:14:58,740 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:14:58,741 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-divine/one_time_barrier_2t.i [2022-07-19 21:14:58,796 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98ef192ed/748606a913094f6291c2e9e9ad351644/FLAG8ba36bd22 [2022-07-19 21:14:59,199 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:14:59,201 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/one_time_barrier_2t.i [2022-07-19 21:14:59,211 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98ef192ed/748606a913094f6291c2e9e9ad351644/FLAG8ba36bd22 [2022-07-19 21:14:59,219 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98ef192ed/748606a913094f6291c2e9e9ad351644 [2022-07-19 21:14:59,221 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:14:59,222 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:14:59,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:14:59,224 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:14:59,226 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:14:59,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:14:59" (1/1) ... [2022-07-19 21:14:59,227 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c0a4ac3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:14:59, skipping insertion in model container [2022-07-19 21:14:59,227 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:14:59" (1/1) ... [2022-07-19 21:14:59,233 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:14:59,257 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:14:59,373 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-19 21:14:59,513 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] [2022-07-19 21:14:59,522 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] [2022-07-19 21:14:59,533 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] [2022-07-19 21:14:59,534 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] [2022-07-19 21:14:59,536 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] [2022-07-19 21:14:59,538 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] [2022-07-19 21:14:59,541 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] [2022-07-19 21:14:59,542 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] [2022-07-19 21:14:59,543 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] [2022-07-19 21:14:59,544 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] [2022-07-19 21:14:59,545 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] [2022-07-19 21:14:59,547 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] [2022-07-19 21:14:59,558 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] [2022-07-19 21:14:59,559 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] [2022-07-19 21:14:59,560 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:14:59,568 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:14:59,580 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-19 21:14:59,599 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] [2022-07-19 21:14:59,606 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] [2022-07-19 21:14:59,610 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] [2022-07-19 21:14:59,612 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] [2022-07-19 21:14:59,613 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] [2022-07-19 21:14:59,615 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] [2022-07-19 21:14:59,617 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] [2022-07-19 21:14:59,618 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] [2022-07-19 21:14:59,620 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] [2022-07-19 21:14:59,621 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] [2022-07-19 21:14:59,622 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] [2022-07-19 21:14:59,623 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] [2022-07-19 21:14:59,628 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] [2022-07-19 21:14:59,632 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] [2022-07-19 21:14:59,634 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:14:59,664 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:14:59,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:14:59 WrapperNode [2022-07-19 21:14:59,664 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:14:59,665 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:14:59,665 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:14:59,665 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:14:59,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:14:59" (1/1) ... [2022-07-19 21:14:59,696 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:14:59" (1/1) ... [2022-07-19 21:14:59,726 INFO L137 Inliner]: procedures = 174, calls = 70, calls flagged for inlining = 6, calls inlined = 8, statements flattened = 459 [2022-07-19 21:14:59,726 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:14:59,727 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:14:59,728 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:14:59,728 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:14:59,733 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:14:59" (1/1) ... [2022-07-19 21:14:59,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:14:59" (1/1) ... [2022-07-19 21:14:59,738 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:14:59" (1/1) ... [2022-07-19 21:14:59,738 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:14:59" (1/1) ... [2022-07-19 21:14:59,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:14:59" (1/1) ... [2022-07-19 21:14:59,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:14:59" (1/1) ... [2022-07-19 21:14:59,773 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:14:59" (1/1) ... [2022-07-19 21:14:59,776 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:14:59,776 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:14:59,777 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:14:59,777 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:14:59,792 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:14:59" (1/1) ... [2022-07-19 21:14:59,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:14:59,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:14:59,824 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) [2022-07-19 21:14:59,830 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 [2022-07-19 21:14:59,848 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:14:59,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:14:59,848 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-19 21:14:59,848 INFO L130 BoogieDeclarations]: Found specification of procedure worker_fn [2022-07-19 21:14:59,849 INFO L138 BoogieDeclarations]: Found implementation of procedure worker_fn [2022-07-19 21:14:59,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:14:59,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-19 21:14:59,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:14:59,849 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-19 21:14:59,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:14:59,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:14:59,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:14:59,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:14:59,850 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:14:59,952 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:14:59,953 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:15:00,363 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:15:00,373 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:15:00,375 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2022-07-19 21:15:00,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:15:00 BoogieIcfgContainer [2022-07-19 21:15:00,377 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:15:00,380 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:15:00,380 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:15:00,382 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:15:00,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:14:59" (1/3) ... [2022-07-19 21:15:00,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6951c4f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:15:00, skipping insertion in model container [2022-07-19 21:15:00,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:14:59" (2/3) ... [2022-07-19 21:15:00,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6951c4f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:15:00, skipping insertion in model container [2022-07-19 21:15:00,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:15:00" (3/3) ... [2022-07-19 21:15:00,385 INFO L111 eAbstractionObserver]: Analyzing ICFG one_time_barrier_2t.i [2022-07-19 21:15:00,388 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:15:00,394 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:15:00,394 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2022-07-19 21:15:00,395 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:15:00,485 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-19 21:15:00,531 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 468 places, 527 transitions, 1062 flow [2022-07-19 21:15:00,728 INFO L129 PetriNetUnfolder]: 94/778 cut-off events. [2022-07-19 21:15:00,728 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:15:00,741 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. [2022-07-19 21:15:00,742 INFO L82 GeneralOperation]: Start removeDead. Operand has 468 places, 527 transitions, 1062 flow [2022-07-19 21:15:00,753 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 468 places, 527 transitions, 1062 flow [2022-07-19 21:15:00,763 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:15:00,767 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@7427f788, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@60f7a1dc [2022-07-19 21:15:00,768 INFO L358 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2022-07-19 21:15:00,772 INFO L129 PetriNetUnfolder]: 3/54 cut-off events. [2022-07-19 21:15:00,772 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:15:00,773 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:00,773 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] [2022-07-19 21:15:00,773 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)] === [2022-07-19 21:15:00,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:00,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1781321971, now seen corresponding path program 1 times [2022-07-19 21:15:00,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:00,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300220514] [2022-07-19 21:15:00,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:00,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:00,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:00,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:15:00,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:00,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300220514] [2022-07-19 21:15:00,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300220514] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:00,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:15:00,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:15:00,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948392247] [2022-07-19 21:15:00,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:00,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:15:00,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:01,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:15:01,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:15:01,022 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 527 [2022-07-19 21:15:01,029 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) [2022-07-19 21:15:01,029 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:01,029 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 527 [2022-07-19 21:15:01,030 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:01,164 INFO L129 PetriNetUnfolder]: 28/718 cut-off events. [2022-07-19 21:15:01,164 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-19 21:15:01,172 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. [2022-07-19 21:15:01,176 INFO L132 encePairwiseOnDemand]: 481/527 looper letters, 15 selfloop transitions, 2 changer transitions 0/490 dead transitions. [2022-07-19 21:15:01,176 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 490 transitions, 1022 flow [2022-07-19 21:15:01,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:15:01,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:15:01,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1481 transitions. [2022-07-19 21:15:01,194 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9367488931056294 [2022-07-19 21:15:01,195 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1481 transitions. [2022-07-19 21:15:01,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1481 transitions. [2022-07-19 21:15:01,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:01,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1481 transitions. [2022-07-19 21:15:01,205 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) [2022-07-19 21:15:01,213 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) [2022-07-19 21:15:01,215 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) [2022-07-19 21:15:01,217 INFO L186 Difference]: Start difference. First operand has 468 places, 527 transitions, 1062 flow. Second operand 3 states and 1481 transitions. [2022-07-19 21:15:01,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 490 transitions, 1022 flow [2022-07-19 21:15:01,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 490 transitions, 1022 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:15:01,232 INFO L242 Difference]: Finished difference. Result has 471 places, 485 transitions, 988 flow [2022-07-19 21:15:01,234 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} [2022-07-19 21:15:01,237 INFO L279 CegarLoopForPetriNet]: 468 programPoint places, 3 predicate places. [2022-07-19 21:15:01,237 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 485 transitions, 988 flow [2022-07-19 21:15:01,238 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) [2022-07-19 21:15:01,242 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:01,242 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] [2022-07-19 21:15:01,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:15:01,242 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)] === [2022-07-19 21:15:01,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:01,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1537206534, now seen corresponding path program 1 times [2022-07-19 21:15:01,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:01,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613391463] [2022-07-19 21:15:01,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:01,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:01,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:01,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:15:01,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:01,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613391463] [2022-07-19 21:15:01,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613391463] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:15:01,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618502001] [2022-07-19 21:15:01,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:01,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:15:01,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:15:01,359 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) [2022-07-19 21:15:01,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:15:01,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:01,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 21:15:01,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:15:01,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:15:01,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:15:01,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:15:01,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618502001] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:15:01,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:15:01,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2022-07-19 21:15:01,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269270375] [2022-07-19 21:15:01,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:15:01,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:15:01,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:01,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:15:01,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:15:01,560 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 527 [2022-07-19 21:15:01,562 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) [2022-07-19 21:15:01,563 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:01,563 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 527 [2022-07-19 21:15:01,563 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:01,697 INFO L129 PetriNetUnfolder]: 28/720 cut-off events. [2022-07-19 21:15:01,697 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-07-19 21:15:01,704 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. [2022-07-19 21:15:01,708 INFO L132 encePairwiseOnDemand]: 523/527 looper letters, 14 selfloop transitions, 4 changer transitions 0/491 dead transitions. [2022-07-19 21:15:01,708 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 491 transitions, 1036 flow [2022-07-19 21:15:01,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 21:15:01,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 21:15:01,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1911 transitions. [2022-07-19 21:15:01,712 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9065464895635673 [2022-07-19 21:15:01,712 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1911 transitions. [2022-07-19 21:15:01,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1911 transitions. [2022-07-19 21:15:01,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:01,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1911 transitions. [2022-07-19 21:15:01,717 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) [2022-07-19 21:15:01,719 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) [2022-07-19 21:15:01,721 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) [2022-07-19 21:15:01,721 INFO L186 Difference]: Start difference. First operand has 471 places, 485 transitions, 988 flow. Second operand 4 states and 1911 transitions. [2022-07-19 21:15:01,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 491 transitions, 1036 flow [2022-07-19 21:15:01,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 491 transitions, 1034 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:15:01,729 INFO L242 Difference]: Finished difference. Result has 475 places, 486 transitions, 1006 flow [2022-07-19 21:15:01,729 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} [2022-07-19 21:15:01,730 INFO L279 CegarLoopForPetriNet]: 468 programPoint places, 7 predicate places. [2022-07-19 21:15:01,730 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 486 transitions, 1006 flow [2022-07-19 21:15:01,733 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) [2022-07-19 21:15:01,733 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:01,733 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] [2022-07-19 21:15:01,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 21:15:01,947 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 [2022-07-19 21:15:01,948 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)] === [2022-07-19 21:15:01,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:01,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1152918931, now seen corresponding path program 2 times [2022-07-19 21:15:01,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:01,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261122919] [2022-07-19 21:15:01,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:01,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:01,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:02,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:15:02,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:02,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261122919] [2022-07-19 21:15:02,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261122919] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:02,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:15:02,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:15:02,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241185014] [2022-07-19 21:15:02,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:02,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:15:02,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:02,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:15:02,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:15:02,017 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 476 out of 527 [2022-07-19 21:15:02,018 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) [2022-07-19 21:15:02,018 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:02,019 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 476 of 527 [2022-07-19 21:15:02,019 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:02,125 INFO L129 PetriNetUnfolder]: 28/718 cut-off events. [2022-07-19 21:15:02,125 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-07-19 21:15:02,131 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. [2022-07-19 21:15:02,134 INFO L132 encePairwiseOnDemand]: 524/527 looper letters, 5 selfloop transitions, 2 changer transitions 0/484 dead transitions. [2022-07-19 21:15:02,134 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 484 transitions, 1016 flow [2022-07-19 21:15:02,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 21:15:02,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 21:15:02,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1912 transitions. [2022-07-19 21:15:02,137 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9070208728652751 [2022-07-19 21:15:02,138 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1912 transitions. [2022-07-19 21:15:02,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1912 transitions. [2022-07-19 21:15:02,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:02,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1912 transitions. [2022-07-19 21:15:02,141 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) [2022-07-19 21:15:02,144 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) [2022-07-19 21:15:02,145 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) [2022-07-19 21:15:02,145 INFO L186 Difference]: Start difference. First operand has 475 places, 486 transitions, 1006 flow. Second operand 4 states and 1912 transitions. [2022-07-19 21:15:02,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 484 transitions, 1016 flow [2022-07-19 21:15:02,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 484 transitions, 1012 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-07-19 21:15:02,153 INFO L242 Difference]: Finished difference. Result has 475 places, 484 transitions, 1002 flow [2022-07-19 21:15:02,153 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} [2022-07-19 21:15:02,155 INFO L279 CegarLoopForPetriNet]: 468 programPoint places, 7 predicate places. [2022-07-19 21:15:02,155 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 484 transitions, 1002 flow [2022-07-19 21:15:02,157 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) [2022-07-19 21:15:02,159 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:02,159 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] [2022-07-19 21:15:02,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:15:02,159 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)] === [2022-07-19 21:15:02,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:02,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1560813962, now seen corresponding path program 1 times [2022-07-19 21:15:02,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:02,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787157911] [2022-07-19 21:15:02,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:02,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:02,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:02,259 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:15:02,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:02,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787157911] [2022-07-19 21:15:02,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787157911] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:15:02,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837689437] [2022-07-19 21:15:02,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:02,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:15:02,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:15:02,261 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) [2022-07-19 21:15:02,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:15:02,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:02,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 21:15:02,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:15:02,393 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:15:02,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:15:02,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837689437] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:02,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:15:02,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-07-19 21:15:02,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001693212] [2022-07-19 21:15:02,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:02,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:15:02,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:02,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:15:02,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:15:02,397 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 475 out of 527 [2022-07-19 21:15:02,398 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) [2022-07-19 21:15:02,399 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:02,399 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 475 of 527 [2022-07-19 21:15:02,399 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:02,525 INFO L129 PetriNetUnfolder]: 28/713 cut-off events. [2022-07-19 21:15:02,525 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-19 21:15:02,530 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. [2022-07-19 21:15:02,534 INFO L132 encePairwiseOnDemand]: 523/527 looper letters, 7 selfloop transitions, 3 changer transitions 0/484 dead transitions. [2022-07-19 21:15:02,534 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 484 transitions, 1020 flow [2022-07-19 21:15:02,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 21:15:02,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 21:15:02,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1911 transitions. [2022-07-19 21:15:02,537 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9065464895635673 [2022-07-19 21:15:02,537 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1911 transitions. [2022-07-19 21:15:02,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1911 transitions. [2022-07-19 21:15:02,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:02,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1911 transitions. [2022-07-19 21:15:02,542 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) [2022-07-19 21:15:02,545 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) [2022-07-19 21:15:02,546 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) [2022-07-19 21:15:02,546 INFO L186 Difference]: Start difference. First operand has 475 places, 484 transitions, 1002 flow. Second operand 4 states and 1911 transitions. [2022-07-19 21:15:02,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 484 transitions, 1020 flow [2022-07-19 21:15:02,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 484 transitions, 1013 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:15:02,556 INFO L242 Difference]: Finished difference. Result has 475 places, 484 transitions, 1008 flow [2022-07-19 21:15:02,557 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} [2022-07-19 21:15:02,558 INFO L279 CegarLoopForPetriNet]: 468 programPoint places, 7 predicate places. [2022-07-19 21:15:02,558 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 484 transitions, 1008 flow [2022-07-19 21:15:02,559 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) [2022-07-19 21:15:02,559 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:02,560 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] [2022-07-19 21:15:02,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 21:15:02,775 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 [2022-07-19 21:15:02,776 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)] === [2022-07-19 21:15:02,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:02,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1230433015, now seen corresponding path program 1 times [2022-07-19 21:15:02,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:02,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108546150] [2022-07-19 21:15:02,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:02,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:02,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:03,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:15:03,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:03,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108546150] [2022-07-19 21:15:03,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108546150] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:03,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:15:03,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-07-19 21:15:03,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747521117] [2022-07-19 21:15:03,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:03,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 21:15:03,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:03,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 21:15:03,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-07-19 21:15:03,500 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 364 out of 527 [2022-07-19 21:15:03,506 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) [2022-07-19 21:15:03,506 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:03,506 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 364 of 527 [2022-07-19 21:15:03,506 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:05,303 INFO L129 PetriNetUnfolder]: 2295/11734 cut-off events. [2022-07-19 21:15:05,303 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-19 21:15:05,328 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. [2022-07-19 21:15:05,369 INFO L132 encePairwiseOnDemand]: 509/527 looper letters, 226 selfloop transitions, 21 changer transitions 0/611 dead transitions. [2022-07-19 21:15:05,369 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 611 transitions, 1756 flow [2022-07-19 21:15:05,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 21:15:05,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-19 21:15:05,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 5711 transitions. [2022-07-19 21:15:05,379 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7224541429475015 [2022-07-19 21:15:05,379 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 5711 transitions. [2022-07-19 21:15:05,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 5711 transitions. [2022-07-19 21:15:05,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:05,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 5711 transitions. [2022-07-19 21:15:05,392 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) [2022-07-19 21:15:05,402 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) [2022-07-19 21:15:05,413 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) [2022-07-19 21:15:05,413 INFO L186 Difference]: Start difference. First operand has 475 places, 484 transitions, 1008 flow. Second operand 15 states and 5711 transitions. [2022-07-19 21:15:05,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 611 transitions, 1756 flow [2022-07-19 21:15:05,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 611 transitions, 1755 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:15:05,423 INFO L242 Difference]: Finished difference. Result has 493 places, 495 transitions, 1113 flow [2022-07-19 21:15:05,424 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} [2022-07-19 21:15:05,426 INFO L279 CegarLoopForPetriNet]: 468 programPoint places, 25 predicate places. [2022-07-19 21:15:05,426 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 495 transitions, 1113 flow [2022-07-19 21:15:05,428 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) [2022-07-19 21:15:05,428 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:05,429 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] [2022-07-19 21:15:05,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:15:05,429 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)] === [2022-07-19 21:15:05,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:05,430 INFO L85 PathProgramCache]: Analyzing trace with hash -936078017, now seen corresponding path program 1 times [2022-07-19 21:15:05,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:05,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798513625] [2022-07-19 21:15:05,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:05,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:05,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:05,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:15:05,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:05,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798513625] [2022-07-19 21:15:05,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798513625] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:05,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:15:05,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:15:05,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952990653] [2022-07-19 21:15:05,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:05,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:15:05,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:05,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:15:05,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:15:05,472 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 475 out of 527 [2022-07-19 21:15:05,473 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) [2022-07-19 21:15:05,474 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:05,474 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 475 of 527 [2022-07-19 21:15:05,474 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:05,659 INFO L129 PetriNetUnfolder]: 65/1426 cut-off events. [2022-07-19 21:15:05,659 INFO L130 PetriNetUnfolder]: For 28/30 co-relation queries the response was YES. [2022-07-19 21:15:05,668 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. [2022-07-19 21:15:05,672 INFO L132 encePairwiseOnDemand]: 524/527 looper letters, 7 selfloop transitions, 2 changer transitions 0/494 dead transitions. [2022-07-19 21:15:05,672 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 494 transitions, 1125 flow [2022-07-19 21:15:05,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:15:05,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:15:05,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1435 transitions. [2022-07-19 21:15:05,675 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9076533839342188 [2022-07-19 21:15:05,675 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1435 transitions. [2022-07-19 21:15:05,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1435 transitions. [2022-07-19 21:15:05,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:05,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1435 transitions. [2022-07-19 21:15:05,677 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) [2022-07-19 21:15:05,679 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) [2022-07-19 21:15:05,680 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) [2022-07-19 21:15:05,680 INFO L186 Difference]: Start difference. First operand has 493 places, 495 transitions, 1113 flow. Second operand 3 states and 1435 transitions. [2022-07-19 21:15:05,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 494 transitions, 1125 flow [2022-07-19 21:15:05,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 494 transitions, 1106 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-07-19 21:15:05,687 INFO L242 Difference]: Finished difference. Result has 486 places, 494 transitions, 1092 flow [2022-07-19 21:15:05,688 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} [2022-07-19 21:15:05,688 INFO L279 CegarLoopForPetriNet]: 468 programPoint places, 18 predicate places. [2022-07-19 21:15:05,688 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 494 transitions, 1092 flow [2022-07-19 21:15:05,689 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) [2022-07-19 21:15:05,689 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:05,689 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] [2022-07-19 21:15:05,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:15:05,689 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)] === [2022-07-19 21:15:05,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:05,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1718239257, now seen corresponding path program 1 times [2022-07-19 21:15:05,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:05,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281963941] [2022-07-19 21:15:05,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:05,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:05,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:06,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:15:06,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:06,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281963941] [2022-07-19 21:15:06,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281963941] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:06,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:15:06,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-07-19 21:15:06,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461181994] [2022-07-19 21:15:06,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:06,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 21:15:06,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:06,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 21:15:06,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-07-19 21:15:06,153 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 364 out of 527 [2022-07-19 21:15:06,156 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) [2022-07-19 21:15:06,157 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:06,157 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 364 of 527 [2022-07-19 21:15:06,159 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:08,041 INFO L129 PetriNetUnfolder]: 2409/12298 cut-off events. [2022-07-19 21:15:08,042 INFO L130 PetriNetUnfolder]: For 492/492 co-relation queries the response was YES. [2022-07-19 21:15:08,072 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. [2022-07-19 21:15:08,103 INFO L132 encePairwiseOnDemand]: 510/527 looper letters, 226 selfloop transitions, 23 changer transitions 0/615 dead transitions. [2022-07-19 21:15:08,103 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 615 transitions, 1852 flow [2022-07-19 21:15:08,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 21:15:08,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-19 21:15:08,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 5710 transitions. [2022-07-19 21:15:08,163 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7223276407337128 [2022-07-19 21:15:08,163 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 5710 transitions. [2022-07-19 21:15:08,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 5710 transitions. [2022-07-19 21:15:08,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:08,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 5710 transitions. [2022-07-19 21:15:08,173 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) [2022-07-19 21:15:08,181 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) [2022-07-19 21:15:08,182 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) [2022-07-19 21:15:08,182 INFO L186 Difference]: Start difference. First operand has 486 places, 494 transitions, 1092 flow. Second operand 15 states and 5710 transitions. [2022-07-19 21:15:08,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 615 transitions, 1852 flow [2022-07-19 21:15:08,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 615 transitions, 1848 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-19 21:15:08,192 INFO L242 Difference]: Finished difference. Result has 502 places, 500 transitions, 1178 flow [2022-07-19 21:15:08,193 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} [2022-07-19 21:15:08,193 INFO L279 CegarLoopForPetriNet]: 468 programPoint places, 34 predicate places. [2022-07-19 21:15:08,193 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 500 transitions, 1178 flow [2022-07-19 21:15:08,195 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) [2022-07-19 21:15:08,195 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:08,195 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] [2022-07-19 21:15:08,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:15:08,195 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)] === [2022-07-19 21:15:08,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:08,196 INFO L85 PathProgramCache]: Analyzing trace with hash 751469111, now seen corresponding path program 1 times [2022-07-19 21:15:08,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:08,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520875541] [2022-07-19 21:15:08,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:08,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:08,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:08,733 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:15:08,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:08,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520875541] [2022-07-19 21:15:08,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520875541] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:15:08,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325030858] [2022-07-19 21:15:08,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:08,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:15:08,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:15:08,735 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) [2022-07-19 21:15:08,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:15:08,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:08,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-19 21:15:08,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:15:09,117 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-19 21:15:09,118 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 [2022-07-19 21:15:09,175 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-19 21:15:09,175 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 [2022-07-19 21:15:09,240 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 [2022-07-19 21:15:09,252 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 [2022-07-19 21:15:09,275 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 [2022-07-19 21:15:09,327 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 [2022-07-19 21:15:09,347 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 [2022-07-19 21:15:09,363 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 [2022-07-19 21:15:09,584 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 [2022-07-19 21:15:09,601 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 [2022-07-19 21:15:09,633 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-19 21:15:09,633 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 [2022-07-19 21:15:09,699 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 [2022-07-19 21:15:09,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:15:09,765 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 [2022-07-19 21:15:09,938 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 [2022-07-19 21:15:09,940 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 21:15:09,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:15:10,102 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 [2022-07-19 21:15:10,147 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 [2022-07-19 21:15:11,450 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-19 21:15:11,451 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 [2022-07-19 21:15:11,483 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-19 21:15:11,484 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 [2022-07-19 21:15:11,495 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-19 21:15:11,496 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 [2022-07-19 21:15:11,507 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-19 21:15:11,508 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 [2022-07-19 21:15:11,520 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-19 21:15:11,521 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 [2022-07-19 21:15:12,017 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:15:12,017 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 [2022-07-19 21:15:12,516 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 21:15:12,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325030858] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:15:12,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:15:12,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 21] total 52 [2022-07-19 21:15:12,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946510263] [2022-07-19 21:15:12,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:15:12,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-19 21:15:12,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:12,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-19 21:15:12,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=2014, Unknown=46, NotChecked=194, Total=2652 [2022-07-19 21:15:12,529 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 364 out of 527 [2022-07-19 21:15:12,542 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) [2022-07-19 21:15:12,542 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:12,542 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 364 of 527 [2022-07-19 21:15:12,542 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:15,723 INFO L129 PetriNetUnfolder]: 2588/13083 cut-off events. [2022-07-19 21:15:15,723 INFO L130 PetriNetUnfolder]: For 1614/1616 co-relation queries the response was YES. [2022-07-19 21:15:15,766 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. [2022-07-19 21:15:15,798 INFO L132 encePairwiseOnDemand]: 501/527 looper letters, 329 selfloop transitions, 57 changer transitions 0/752 dead transitions. [2022-07-19 21:15:15,799 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 752 transitions, 2535 flow [2022-07-19 21:15:15,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-19 21:15:15,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-07-19 21:15:15,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 9485 transitions. [2022-07-19 21:15:15,813 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7199240986717268 [2022-07-19 21:15:15,813 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 9485 transitions. [2022-07-19 21:15:15,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 9485 transitions. [2022-07-19 21:15:15,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:15,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 9485 transitions. [2022-07-19 21:15:15,829 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) [2022-07-19 21:15:15,842 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) [2022-07-19 21:15:15,844 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) [2022-07-19 21:15:15,844 INFO L186 Difference]: Start difference. First operand has 502 places, 500 transitions, 1178 flow. Second operand 25 states and 9485 transitions. [2022-07-19 21:15:15,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 752 transitions, 2535 flow [2022-07-19 21:15:15,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 752 transitions, 2505 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-07-19 21:15:15,858 INFO L242 Difference]: Finished difference. Result has 524 places, 531 transitions, 1495 flow [2022-07-19 21:15:15,859 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} [2022-07-19 21:15:15,860 INFO L279 CegarLoopForPetriNet]: 468 programPoint places, 56 predicate places. [2022-07-19 21:15:15,861 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 531 transitions, 1495 flow [2022-07-19 21:15:15,865 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) [2022-07-19 21:15:15,865 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:15,865 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] [2022-07-19 21:15:15,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 21:15:16,079 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 [2022-07-19 21:15:16,079 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)] === [2022-07-19 21:15:16,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:16,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1186418847, now seen corresponding path program 1 times [2022-07-19 21:15:16,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:16,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750402358] [2022-07-19 21:15:16,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:16,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:16,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:16,607 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:15:16,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:16,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750402358] [2022-07-19 21:15:16,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750402358] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:15:16,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754670239] [2022-07-19 21:15:16,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:16,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:15:16,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:15:16,610 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) [2022-07-19 21:15:16,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 21:15:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:16,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-19 21:15:16,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:15:16,924 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-19 21:15:16,925 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 [2022-07-19 21:15:16,983 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-19 21:15:16,983 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 [2022-07-19 21:15:17,053 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 [2022-07-19 21:15:17,072 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 [2022-07-19 21:15:17,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-19 21:15:17,158 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 [2022-07-19 21:15:17,168 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 [2022-07-19 21:15:17,186 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 [2022-07-19 21:15:17,343 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 [2022-07-19 21:15:17,358 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 [2022-07-19 21:15:17,431 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-19 21:15:17,431 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 [2022-07-19 21:15:17,492 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 [2022-07-19 21:15:17,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:15:17,595 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 [2022-07-19 21:15:17,615 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 [2022-07-19 21:15:17,617 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 21:15:17,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:15:17,660 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 [2022-07-19 21:15:17,688 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 [2022-07-19 21:15:18,283 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 [2022-07-19 21:15:18,375 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 [2022-07-19 21:15:18,394 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 [2022-07-19 21:15:18,412 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 [2022-07-19 21:15:18,430 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 [2022-07-19 21:15:22,517 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:15:22,517 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 [2022-07-19 21:15:23,693 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 1 not checked. [2022-07-19 21:15:23,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754670239] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:15:23,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:15:23,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17] total 42 [2022-07-19 21:15:23,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751039487] [2022-07-19 21:15:23,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:15:23,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-19 21:15:23,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:23,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-19 21:15:23,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=1212, Unknown=33, NotChecked=154, Total=1722 [2022-07-19 21:15:23,703 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 363 out of 527 [2022-07-19 21:15:23,709 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) [2022-07-19 21:15:23,710 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:23,710 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 363 of 527 [2022-07-19 21:15:23,710 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:25,964 INFO L129 PetriNetUnfolder]: 2709/14394 cut-off events. [2022-07-19 21:15:25,964 INFO L130 PetriNetUnfolder]: For 3323/3419 co-relation queries the response was YES. [2022-07-19 21:15:26,020 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. [2022-07-19 21:15:26,057 INFO L132 encePairwiseOnDemand]: 508/527 looper letters, 256 selfloop transitions, 36 changer transitions 0/673 dead transitions. [2022-07-19 21:15:26,058 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 673 transitions, 2452 flow [2022-07-19 21:15:26,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 21:15:26,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-19 21:15:26,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 6071 transitions. [2022-07-19 21:15:26,066 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7199952561669829 [2022-07-19 21:15:26,066 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 6071 transitions. [2022-07-19 21:15:26,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 6071 transitions. [2022-07-19 21:15:26,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:26,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 6071 transitions. [2022-07-19 21:15:26,075 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) [2022-07-19 21:15:26,211 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) [2022-07-19 21:15:26,212 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) [2022-07-19 21:15:26,212 INFO L186 Difference]: Start difference. First operand has 524 places, 531 transitions, 1495 flow. Second operand 16 states and 6071 transitions. [2022-07-19 21:15:26,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 673 transitions, 2452 flow [2022-07-19 21:15:26,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 673 transitions, 2351 flow, removed 27 selfloop flow, removed 12 redundant places. [2022-07-19 21:15:26,233 INFO L242 Difference]: Finished difference. Result has 532 places, 542 transitions, 1587 flow [2022-07-19 21:15:26,233 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} [2022-07-19 21:15:26,234 INFO L279 CegarLoopForPetriNet]: 468 programPoint places, 64 predicate places. [2022-07-19 21:15:26,234 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 542 transitions, 1587 flow [2022-07-19 21:15:26,237 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) [2022-07-19 21:15:26,238 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:26,238 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] [2022-07-19 21:15:26,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-19 21:15:26,455 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 [2022-07-19 21:15:26,456 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)] === [2022-07-19 21:15:26,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:26,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1649056811, now seen corresponding path program 1 times [2022-07-19 21:15:26,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:26,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91743140] [2022-07-19 21:15:26,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:26,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:26,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:27,136 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:15:27,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:27,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91743140] [2022-07-19 21:15:27,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91743140] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:15:27,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400118593] [2022-07-19 21:15:27,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:27,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:15:27,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:15:27,138 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) [2022-07-19 21:15:27,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 21:15:27,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:27,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-19 21:15:27,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:15:27,484 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-19 21:15:27,484 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 [2022-07-19 21:15:27,547 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-19 21:15:27,547 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 [2022-07-19 21:15:27,608 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 [2022-07-19 21:15:27,625 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 [2022-07-19 21:15:27,642 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 [2022-07-19 21:15:27,705 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 [2022-07-19 21:15:27,720 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 [2022-07-19 21:15:27,736 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 [2022-07-19 21:15:27,918 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 [2022-07-19 21:15:27,931 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 [2022-07-19 21:15:27,968 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-19 21:15:27,968 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 [2022-07-19 21:15:28,036 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 [2022-07-19 21:15:28,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:15:28,110 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 [2022-07-19 21:15:28,325 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 [2022-07-19 21:15:28,327 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 21:15:28,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:15:28,510 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 [2022-07-19 21:15:28,548 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 [2022-07-19 21:15:29,688 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-19 21:15:29,689 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 [2022-07-19 21:15:29,712 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-19 21:15:29,713 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 [2022-07-19 21:15:29,722 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-19 21:15:29,723 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 [2022-07-19 21:15:29,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 21:15:29,731 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 [2022-07-19 21:15:29,741 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-19 21:15:29,741 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 [2022-07-19 21:15:30,973 INFO L356 Elim1Store]: treesize reduction 5, result has 98.9 percent of original size [2022-07-19 21:15:30,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 726 treesize of output 1123 [2022-07-19 21:15:32,461 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 21:15:32,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400118593] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:15:32,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:15:32,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 21] total 53 [2022-07-19 21:15:32,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594326528] [2022-07-19 21:15:32,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:15:32,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-19 21:15:32,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:32,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-19 21:15:32,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=2146, Unknown=43, NotChecked=198, Total=2756 [2022-07-19 21:15:32,470 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 364 out of 527 [2022-07-19 21:15:32,477 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) [2022-07-19 21:15:32,477 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:32,477 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 364 of 527 [2022-07-19 21:15:32,477 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:36,222 INFO L129 PetriNetUnfolder]: 2767/14414 cut-off events. [2022-07-19 21:15:36,223 INFO L130 PetriNetUnfolder]: For 4501/4640 co-relation queries the response was YES. [2022-07-19 21:15:36,270 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. [2022-07-19 21:15:36,302 INFO L132 encePairwiseOnDemand]: 500/527 looper letters, 339 selfloop transitions, 65 changer transitions 0/784 dead transitions. [2022-07-19 21:15:36,302 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 784 transitions, 3065 flow [2022-07-19 21:15:36,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-19 21:15:36,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-07-19 21:15:36,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 10212 transitions. [2022-07-19 21:15:36,317 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7176892262281257 [2022-07-19 21:15:36,317 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 10212 transitions. [2022-07-19 21:15:36,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 10212 transitions. [2022-07-19 21:15:36,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:36,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 10212 transitions. [2022-07-19 21:15:36,332 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) [2022-07-19 21:15:36,347 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) [2022-07-19 21:15:36,348 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) [2022-07-19 21:15:36,348 INFO L186 Difference]: Start difference. First operand has 532 places, 542 transitions, 1587 flow. Second operand 27 states and 10212 transitions. [2022-07-19 21:15:36,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 784 transitions, 3065 flow [2022-07-19 21:15:36,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 550 places, 784 transitions, 3040 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-07-19 21:15:36,371 INFO L242 Difference]: Finished difference. Result has 554 places, 559 transitions, 1892 flow [2022-07-19 21:15:36,372 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} [2022-07-19 21:15:36,373 INFO L279 CegarLoopForPetriNet]: 468 programPoint places, 86 predicate places. [2022-07-19 21:15:36,373 INFO L495 AbstractCegarLoop]: Abstraction has has 554 places, 559 transitions, 1892 flow [2022-07-19 21:15:36,375 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) [2022-07-19 21:15:36,376 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:36,376 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] [2022-07-19 21:15:36,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 21:15:36,591 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 [2022-07-19 21:15:36,591 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)] === [2022-07-19 21:15:36,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:36,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1326972318, now seen corresponding path program 1 times [2022-07-19 21:15:36,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:36,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971050278] [2022-07-19 21:15:36,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:36,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:36,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:37,171 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:15:37,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:37,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971050278] [2022-07-19 21:15:37,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971050278] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:15:37,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169137889] [2022-07-19 21:15:37,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:37,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:15:37,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:15:37,173 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) [2022-07-19 21:15:37,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 21:15:37,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:37,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-19 21:15:37,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:15:37,713 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-19 21:15:37,713 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 [2022-07-19 21:15:37,807 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-07-19 21:15:37,807 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 [2022-07-19 21:15:37,916 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 [2022-07-19 21:15:37,944 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 [2022-07-19 21:15:37,972 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 [2022-07-19 21:15:38,088 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 [2022-07-19 21:15:38,131 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 [2022-07-19 21:15:38,153 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 [2022-07-19 21:15:38,444 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 [2022-07-19 21:15:38,473 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 [2022-07-19 21:15:38,593 INFO L356 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-07-19 21:15:38,594 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 [2022-07-19 21:15:38,693 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 [2022-07-19 21:15:38,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:15:38,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:15:38,927 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 [2022-07-19 21:15:39,093 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 [2022-07-19 21:15:39,095 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 21:15:39,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:15:40,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 21:15:40,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 21:15:40,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 21:15:40,578 INFO L356 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-07-19 21:15:40,579 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 [2022-07-19 21:15:40,604 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:15:40,604 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 [2022-07-19 21:15:40,618 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 [2022-07-19 21:15:40,627 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 994 [2022-07-19 21:15:40,636 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 994 treesize of output 962 [2022-07-19 21:15:41,217 INFO L356 Elim1Store]: treesize reduction 10, result has 97.2 percent of original size [2022-07-19 21:15:41,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 44 case distinctions, treesize of input 264 treesize of output 582 [2022-07-19 21:15:44,710 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 21:15:44,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169137889] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:15:44,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:15:44,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 22] total 55 [2022-07-19 21:15:44,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352714526] [2022-07-19 21:15:44,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:15:44,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-07-19 21:15:44,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:44,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-07-19 21:15:44,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=2381, Unknown=70, NotChecked=0, Total=2970 [2022-07-19 21:15:44,719 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 359 out of 527 [2022-07-19 21:15:44,731 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) [2022-07-19 21:15:44,731 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:44,731 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 359 of 527 [2022-07-19 21:15:44,732 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:48,478 INFO L129 PetriNetUnfolder]: 2930/15605 cut-off events. [2022-07-19 21:15:48,478 INFO L130 PetriNetUnfolder]: For 7146/7276 co-relation queries the response was YES. [2022-07-19 21:15:48,540 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. [2022-07-19 21:15:48,576 INFO L132 encePairwiseOnDemand]: 499/527 looper letters, 303 selfloop transitions, 54 changer transitions 0/741 dead transitions. [2022-07-19 21:15:48,576 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 741 transitions, 3125 flow [2022-07-19 21:15:48,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-19 21:15:48,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-07-19 21:15:48,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 8568 transitions. [2022-07-19 21:15:48,584 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7068723702664796 [2022-07-19 21:15:48,584 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 8568 transitions. [2022-07-19 21:15:48,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 8568 transitions. [2022-07-19 21:15:48,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:48,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 8568 transitions. [2022-07-19 21:15:48,594 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) [2022-07-19 21:15:48,602 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) [2022-07-19 21:15:48,603 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) [2022-07-19 21:15:48,604 INFO L186 Difference]: Start difference. First operand has 554 places, 559 transitions, 1892 flow. Second operand 23 states and 8568 transitions. [2022-07-19 21:15:48,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 741 transitions, 3125 flow [2022-07-19 21:15:48,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 559 places, 741 transitions, 2985 flow, removed 35 selfloop flow, removed 17 redundant places. [2022-07-19 21:15:48,635 INFO L242 Difference]: Finished difference. Result has 565 places, 573 transitions, 2041 flow [2022-07-19 21:15:48,636 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} [2022-07-19 21:15:48,636 INFO L279 CegarLoopForPetriNet]: 468 programPoint places, 97 predicate places. [2022-07-19 21:15:48,637 INFO L495 AbstractCegarLoop]: Abstraction has has 565 places, 573 transitions, 2041 flow [2022-07-19 21:15:48,639 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) [2022-07-19 21:15:48,639 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:48,639 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] [2022-07-19 21:15:48,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 21:15:48,840 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 [2022-07-19 21:15:48,841 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)] === [2022-07-19 21:15:48,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:48,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1295445784, now seen corresponding path program 1 times [2022-07-19 21:15:48,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:48,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426273747] [2022-07-19 21:15:48,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:48,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:48,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:49,435 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:15:49,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:49,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426273747] [2022-07-19 21:15:49,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426273747] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:15:49,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061494310] [2022-07-19 21:15:49,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:49,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:15:49,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:15:49,437 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) [2022-07-19 21:15:49,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 21:15:49,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:49,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-19 21:15:49,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:15:49,789 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-19 21:15:49,789 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 [2022-07-19 21:15:49,842 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-19 21:15:49,842 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 [2022-07-19 21:15:49,900 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 [2022-07-19 21:15:49,915 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 [2022-07-19 21:15:49,929 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 [2022-07-19 21:15:49,983 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 [2022-07-19 21:15:50,000 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 [2022-07-19 21:15:50,010 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 [2022-07-19 21:15:50,166 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 [2022-07-19 21:15:50,179 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 [2022-07-19 21:15:50,214 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-19 21:15:50,214 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 [2022-07-19 21:15:50,272 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 [2022-07-19 21:15:50,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:15:50,416 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 [2022-07-19 21:15:50,597 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 [2022-07-19 21:15:50,599 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 21:15:50,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:15:50,742 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 [2022-07-19 21:15:50,800 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 [2022-07-19 21:15:51,968 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-19 21:15:51,968 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 [2022-07-19 21:15:52,017 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-19 21:15:52,017 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 [2022-07-19 21:15:52,033 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-19 21:15:52,034 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 2184 treesize of output 1992 [2022-07-19 21:15:52,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 21:15:52,048 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 1530 treesize of output 1434 [2022-07-19 21:15:52,063 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-19 21:15:52,063 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 1896 treesize of output 1872 [2022-07-19 21:15:53,988 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:15:53,989 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 [2022-07-19 21:15:54,470 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 1 not checked. [2022-07-19 21:15:54,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061494310] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:15:54,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:15:54,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 21] total 53 [2022-07-19 21:15:54,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800492608] [2022-07-19 21:15:54,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:15:54,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-19 21:15:54,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:54,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-19 21:15:54,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=2091, Unknown=45, NotChecked=198, Total=2756 [2022-07-19 21:15:54,479 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 363 out of 527 [2022-07-19 21:15:54,494 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) [2022-07-19 21:15:54,494 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:54,495 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 363 of 527 [2022-07-19 21:15:54,495 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:57,968 INFO L129 PetriNetUnfolder]: 2769/15484 cut-off events. [2022-07-19 21:15:57,968 INFO L130 PetriNetUnfolder]: For 7312/7434 co-relation queries the response was YES. [2022-07-19 21:15:58,038 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. [2022-07-19 21:15:58,070 INFO L132 encePairwiseOnDemand]: 501/527 looper letters, 294 selfloop transitions, 53 changer transitions 0/740 dead transitions. [2022-07-19 21:15:58,070 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 740 transitions, 3205 flow [2022-07-19 21:15:58,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-19 21:15:58,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-07-19 21:15:58,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 8285 transitions. [2022-07-19 21:15:58,076 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7145937553907193 [2022-07-19 21:15:58,076 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 8285 transitions. [2022-07-19 21:15:58,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 8285 transitions. [2022-07-19 21:15:58,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:58,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 8285 transitions. [2022-07-19 21:15:58,084 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) [2022-07-19 21:15:58,090 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) [2022-07-19 21:15:58,091 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) [2022-07-19 21:15:58,091 INFO L186 Difference]: Start difference. First operand has 565 places, 573 transitions, 2041 flow. Second operand 22 states and 8285 transitions. [2022-07-19 21:15:58,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 740 transitions, 3205 flow [2022-07-19 21:15:58,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 740 transitions, 3158 flow, removed 1 selfloop flow, removed 15 redundant places. [2022-07-19 21:15:58,116 INFO L242 Difference]: Finished difference. Result has 575 places, 588 transitions, 2276 flow [2022-07-19 21:15:58,117 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} [2022-07-19 21:15:58,117 INFO L279 CegarLoopForPetriNet]: 468 programPoint places, 107 predicate places. [2022-07-19 21:15:58,118 INFO L495 AbstractCegarLoop]: Abstraction has has 575 places, 588 transitions, 2276 flow [2022-07-19 21:15:58,120 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) [2022-07-19 21:15:58,120 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:58,120 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] [2022-07-19 21:15:58,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 21:15:58,320 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 [2022-07-19 21:15:58,321 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)] === [2022-07-19 21:15:58,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:58,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1941790587, now seen corresponding path program 1 times [2022-07-19 21:15:58,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:58,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956851064] [2022-07-19 21:15:58,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:58,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:58,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:58,861 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:15:58,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:58,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956851064] [2022-07-19 21:15:58,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956851064] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:15:58,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701691132] [2022-07-19 21:15:58,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:58,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:15:58,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:15:58,863 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) [2022-07-19 21:15:58,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 21:15:59,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:59,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-19 21:15:59,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:15:59,227 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-19 21:15:59,228 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 [2022-07-19 21:15:59,287 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-19 21:15:59,287 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 [2022-07-19 21:15:59,350 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 [2022-07-19 21:15:59,364 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 [2022-07-19 21:15:59,377 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 [2022-07-19 21:15:59,440 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 [2022-07-19 21:15:59,455 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 [2022-07-19 21:15:59,467 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 [2022-07-19 21:15:59,632 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 [2022-07-19 21:15:59,645 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 [2022-07-19 21:15:59,774 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-19 21:15:59,775 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 [2022-07-19 21:15:59,839 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 [2022-07-19 21:15:59,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:15:59,961 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 [2022-07-19 21:16:00,151 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 [2022-07-19 21:16:00,154 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 21:16:00,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:16:00,338 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 [2022-07-19 21:16:00,399 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 [2022-07-19 21:16:01,528 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-19 21:16:01,529 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 [2022-07-19 21:16:01,876 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-19 21:16:01,877 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 [2022-07-19 21:16:01,961 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-19 21:16:01,961 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 8700 [2022-07-19 21:16:01,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 21:16:01,996 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 6482 treesize of output 6098 [2022-07-19 21:16:02,034 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-19 21:16:02,034 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 8316 treesize of output 7548