./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum_m4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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/array-crafted/zero_sum_m4.c -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 9b7320b0b08ab747958954e3beeb769f7a9cf6ae7994b9d20ef1bd1e033aa0a7 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 11:26:27,360 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 11:26:27,362 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 11:26:27,400 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 11:26:27,401 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 11:26:27,403 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 11:26:27,404 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 11:26:27,408 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 11:26:27,410 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 11:26:27,414 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 11:26:27,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 11:26:27,416 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 11:26:27,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 11:26:27,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 11:26:27,421 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 11:26:27,423 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 11:26:27,424 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 11:26:27,425 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 11:26:27,429 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 11:26:27,434 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 11:26:27,435 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 11:26:27,436 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 11:26:27,438 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 11:26:27,438 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 11:26:27,444 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 11:26:27,445 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 11:26:27,445 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 11:26:27,446 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 11:26:27,447 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 11:26:27,447 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 11:26:27,448 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 11:26:27,449 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 11:26:27,450 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 11:26:27,451 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 11:26:27,452 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 11:26:27,452 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 11:26:27,453 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 11:26:27,453 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 11:26:27,453 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 11:26:27,454 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 11:26:27,454 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 11:26:27,456 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 11:26:27,481 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 11:26:27,492 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 11:26:27,493 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 11:26:27,493 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 11:26:27,494 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 11:26:27,494 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 11:26:27,495 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 11:26:27,495 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 11:26:27,495 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 11:26:27,495 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 11:26:27,496 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 11:26:27,496 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 11:26:27,496 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 11:26:27,497 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 11:26:27,497 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 11:26:27,497 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 11:26:27,497 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 11:26:27,497 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 11:26:27,497 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 11:26:27,498 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 11:26:27,498 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 11:26:27,498 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 11:26:27,498 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 11:26:27,498 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 11:26:27,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 11:26:27,499 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 11:26:27,499 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 11:26:27,499 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 11:26:27,499 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 11:26:27,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 11:26:27,499 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 11:26:27,500 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 11:26:27,500 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 11:26:27,500 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 11:26:27,500 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9b7320b0b08ab747958954e3beeb769f7a9cf6ae7994b9d20ef1bd1e033aa0a7 [2021-12-14 11:26:27,792 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 11:26:27,824 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 11:26:27,826 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 11:26:27,827 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 11:26:27,828 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 11:26:27,829 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_m4.c [2021-12-14 11:26:27,926 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08f622558/80baf7dd00ce4903ac990523f3ef4623/FLAG480fc284b [2021-12-14 11:26:28,318 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 11:26:28,318 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_m4.c [2021-12-14 11:26:28,323 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08f622558/80baf7dd00ce4903ac990523f3ef4623/FLAG480fc284b [2021-12-14 11:26:28,335 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08f622558/80baf7dd00ce4903ac990523f3ef4623 [2021-12-14 11:26:28,337 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 11:26:28,339 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 11:26:28,342 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 11:26:28,342 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 11:26:28,345 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 11:26:28,346 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:26:28" (1/1) ... [2021-12-14 11:26:28,347 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13ef9a2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:28, skipping insertion in model container [2021-12-14 11:26:28,347 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:26:28" (1/1) ... [2021-12-14 11:26:28,352 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 11:26:28,366 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 11:26:28,564 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/array-crafted/zero_sum_m4.c[402,415] [2021-12-14 11:26:28,597 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 11:26:28,609 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 11:26:28,622 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/array-crafted/zero_sum_m4.c[402,415] [2021-12-14 11:26:28,649 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 11:26:28,661 INFO L208 MainTranslator]: Completed translation [2021-12-14 11:26:28,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:28 WrapperNode [2021-12-14 11:26:28,663 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 11:26:28,664 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 11:26:28,664 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 11:26:28,664 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 11:26:28,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:28" (1/1) ... [2021-12-14 11:26:28,682 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:28" (1/1) ... [2021-12-14 11:26:28,707 INFO L137 Inliner]: procedures = 15, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 127 [2021-12-14 11:26:28,708 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 11:26:28,709 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 11:26:28,709 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 11:26:28,709 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 11:26:28,716 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:28" (1/1) ... [2021-12-14 11:26:28,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:28" (1/1) ... [2021-12-14 11:26:28,720 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:28" (1/1) ... [2021-12-14 11:26:28,720 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:28" (1/1) ... [2021-12-14 11:26:28,736 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:28" (1/1) ... [2021-12-14 11:26:28,740 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:28" (1/1) ... [2021-12-14 11:26:28,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:28" (1/1) ... [2021-12-14 11:26:28,749 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 11:26:28,751 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 11:26:28,751 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 11:26:28,751 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 11:26:28,752 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:28" (1/1) ... [2021-12-14 11:26:28,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 11:26:28,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:26:28,784 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) [2021-12-14 11:26:28,810 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 [2021-12-14 11:26:28,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 11:26:28,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 11:26:28,831 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 11:26:28,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 11:26:28,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 11:26:28,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 11:26:28,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 11:26:28,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 11:26:28,909 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 11:26:28,910 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 11:26:29,128 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 11:26:29,133 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 11:26:29,133 INFO L301 CfgBuilder]: Removed 9 assume(true) statements. [2021-12-14 11:26:29,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:26:29 BoogieIcfgContainer [2021-12-14 11:26:29,135 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 11:26:29,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 11:26:29,138 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 11:26:29,143 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 11:26:29,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:26:28" (1/3) ... [2021-12-14 11:26:29,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f01f30f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:26:29, skipping insertion in model container [2021-12-14 11:26:29,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:26:28" (2/3) ... [2021-12-14 11:26:29,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f01f30f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:26:29, skipping insertion in model container [2021-12-14 11:26:29,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:26:29" (3/3) ... [2021-12-14 11:26:29,161 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_m4.c [2021-12-14 11:26:29,165 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 11:26:29,165 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 11:26:29,212 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 11:26:29,218 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 11:26:29,218 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 11:26:29,235 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:29,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-14 11:26:29,241 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:26:29,242 INFO L514 BasicCegarLoop]: 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] [2021-12-14 11:26:29,242 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:26:29,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:26:29,247 INFO L85 PathProgramCache]: Analyzing trace with hash -2094998668, now seen corresponding path program 1 times [2021-12-14 11:26:29,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:26:29,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996107619] [2021-12-14 11:26:29,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:26:29,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:26:29,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:26:29,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:26:29,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:26:29,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996107619] [2021-12-14 11:26:29,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996107619] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:26:29,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:26:29,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 11:26:29,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657230061] [2021-12-14 11:26:29,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:26:29,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 11:26:29,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:26:29,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 11:26:29,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 11:26:29,389 INFO L87 Difference]: Start difference. First operand has 38 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:29,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:26:29,404 INFO L93 Difference]: Finished difference Result 71 states and 106 transitions. [2021-12-14 11:26:29,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 11:26:29,406 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-14 11:26:29,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:26:29,412 INFO L225 Difference]: With dead ends: 71 [2021-12-14 11:26:29,413 INFO L226 Difference]: Without dead ends: 33 [2021-12-14 11:26:29,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 11:26:29,418 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:26:29,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:26:29,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-14 11:26:29,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-12-14 11:26:29,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:29,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2021-12-14 11:26:29,446 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 23 [2021-12-14 11:26:29,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:26:29,447 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2021-12-14 11:26:29,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:29,447 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2021-12-14 11:26:29,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-14 11:26:29,448 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:26:29,448 INFO L514 BasicCegarLoop]: 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] [2021-12-14 11:26:29,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 11:26:29,449 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:26:29,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:26:29,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1680934388, now seen corresponding path program 1 times [2021-12-14 11:26:29,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:26:29,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622495872] [2021-12-14 11:26:29,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:26:29,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:26:29,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:26:29,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:26:29,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:26:29,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622495872] [2021-12-14 11:26:29,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622495872] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:26:29,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:26:29,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 11:26:29,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463966878] [2021-12-14 11:26:29,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:26:29,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 11:26:29,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:26:29,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 11:26:29,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 11:26:29,510 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:29,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:26:29,585 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2021-12-14 11:26:29,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 11:26:29,586 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-14 11:26:29,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:26:29,587 INFO L225 Difference]: With dead ends: 63 [2021-12-14 11:26:29,587 INFO L226 Difference]: Without dead ends: 35 [2021-12-14 11:26:29,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 11:26:29,588 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:26:29,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:26:29,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-14 11:26:29,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-12-14 11:26:29,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:29,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2021-12-14 11:26:29,595 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 23 [2021-12-14 11:26:29,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:26:29,596 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2021-12-14 11:26:29,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:29,596 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2021-12-14 11:26:29,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-14 11:26:29,597 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:26:29,597 INFO L514 BasicCegarLoop]: 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] [2021-12-14 11:26:29,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 11:26:29,597 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:26:29,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:26:29,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1381660206, now seen corresponding path program 1 times [2021-12-14 11:26:29,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:26:29,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515054843] [2021-12-14 11:26:29,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:26:29,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:26:29,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:26:29,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 11:26:29,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:26:29,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515054843] [2021-12-14 11:26:29,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515054843] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:26:29,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:26:29,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 11:26:29,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532547780] [2021-12-14 11:26:29,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:26:29,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 11:26:29,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:26:29,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 11:26:29,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 11:26:29,719 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:29,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:26:29,862 INFO L93 Difference]: Finished difference Result 75 states and 97 transitions. [2021-12-14 11:26:29,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 11:26:29,863 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-14 11:26:29,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:26:29,864 INFO L225 Difference]: With dead ends: 75 [2021-12-14 11:26:29,864 INFO L226 Difference]: Without dead ends: 50 [2021-12-14 11:26:29,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 11:26:29,866 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 51 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:26:29,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 19 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:26:29,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-14 11:26:29,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-12-14 11:26:29,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:29,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-12-14 11:26:29,884 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 25 [2021-12-14 11:26:29,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:26:29,884 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-12-14 11:26:29,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:29,888 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-12-14 11:26:29,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-14 11:26:29,889 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:26:29,890 INFO L514 BasicCegarLoop]: 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] [2021-12-14 11:26:29,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 11:26:29,892 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:26:29,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:26:29,892 INFO L85 PathProgramCache]: Analyzing trace with hash -158323138, now seen corresponding path program 1 times [2021-12-14 11:26:29,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:26:29,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677954424] [2021-12-14 11:26:29,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:26:29,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:26:29,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:26:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-14 11:26:29,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:26:29,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677954424] [2021-12-14 11:26:29,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677954424] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:26:29,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025731748] [2021-12-14 11:26:29,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:26:29,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:26:29,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:26:29,996 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) [2021-12-14 11:26:29,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 11:26:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:26:30,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 11:26:30,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:26:30,249 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-14 11:26:30,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:26:30,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-14 11:26:30,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025731748] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:26:30,364 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:26:30,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-14 11:26:30,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041528769] [2021-12-14 11:26:30,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:26:30,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 11:26:30,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:26:30,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 11:26:30,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-14 11:26:30,371 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:30,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:26:30,425 INFO L93 Difference]: Finished difference Result 81 states and 97 transitions. [2021-12-14 11:26:30,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 11:26:30,426 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-14 11:26:30,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:26:30,426 INFO L225 Difference]: With dead ends: 81 [2021-12-14 11:26:30,426 INFO L226 Difference]: Without dead ends: 45 [2021-12-14 11:26:30,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-14 11:26:30,428 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 2 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:26:30,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 77 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:26:30,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-14 11:26:30,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2021-12-14 11:26:30,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:30,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2021-12-14 11:26:30,434 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 41 [2021-12-14 11:26:30,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:26:30,434 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2021-12-14 11:26:30,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:30,435 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2021-12-14 11:26:30,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-14 11:26:30,436 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:26:30,436 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 11:26:30,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 11:26:30,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:26:30,662 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:26:30,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:26:30,662 INFO L85 PathProgramCache]: Analyzing trace with hash 408266208, now seen corresponding path program 2 times [2021-12-14 11:26:30,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:26:30,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560481859] [2021-12-14 11:26:30,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:26:30,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:26:30,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:26:30,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-14 11:26:30,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:26:30,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560481859] [2021-12-14 11:26:30,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560481859] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:26:30,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383182853] [2021-12-14 11:26:30,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 11:26:30,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:26:30,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:26:30,757 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) [2021-12-14 11:26:30,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 11:26:30,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 11:26:30,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:26:30,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 11:26:30,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:26:30,963 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-14 11:26:30,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:26:31,057 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-14 11:26:31,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383182853] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:26:31,057 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:26:31,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-14 11:26:31,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746776119] [2021-12-14 11:26:31,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:26:31,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 11:26:31,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:26:31,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 11:26:31,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-12-14 11:26:31,060 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:31,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:26:31,282 INFO L93 Difference]: Finished difference Result 100 states and 122 transitions. [2021-12-14 11:26:31,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 11:26:31,283 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-14 11:26:31,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:26:31,284 INFO L225 Difference]: With dead ends: 100 [2021-12-14 11:26:31,284 INFO L226 Difference]: Without dead ends: 68 [2021-12-14 11:26:31,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2021-12-14 11:26:31,285 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 44 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 11:26:31,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 27 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 11:26:31,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-14 11:26:31,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2021-12-14 11:26:31,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:31,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-12-14 11:26:31,297 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 43 [2021-12-14 11:26:31,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:26:31,297 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-12-14 11:26:31,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:26:31,298 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-12-14 11:26:31,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-14 11:26:31,301 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:26:31,301 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2021-12-14 11:26:31,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 11:26:31,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:26:31,503 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:26:31,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:26:31,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1004340752, now seen corresponding path program 3 times [2021-12-14 11:26:31,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:26:31,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041273472] [2021-12-14 11:26:31,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:26:31,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:26:31,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:26:34,311 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:26:34,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:26:34,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041273472] [2021-12-14 11:26:34,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041273472] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:26:34,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424355785] [2021-12-14 11:26:34,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 11:26:34,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:26:34,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:26:34,314 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) [2021-12-14 11:26:34,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 11:26:34,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-14 11:26:34,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:26:34,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-14 11:26:34,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:26:41,023 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 11:26:41,023 INFO L388 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 17 treesize of output 18 [2021-12-14 11:26:41,442 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:26:41,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:27:03,917 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 11:27:03,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 103 [2021-12-14 11:27:05,216 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:27:05,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424355785] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:27:05,216 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:27:05,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 47, 44] total 120 [2021-12-14 11:27:05,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684125023] [2021-12-14 11:27:05,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:27:05,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2021-12-14 11:27:05,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:27:05,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2021-12-14 11:27:05,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=13544, Unknown=0, NotChecked=0, Total=14280 [2021-12-14 11:27:05,225 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 120 states, 120 states have (on average 1.4083333333333334) internal successors, (169), 120 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:27:16,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:27:16,004 INFO L93 Difference]: Finished difference Result 161 states and 185 transitions. [2021-12-14 11:27:16,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-12-14 11:27:16,007 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 1.4083333333333334) internal successors, (169), 120 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-14 11:27:16,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:27:16,013 INFO L225 Difference]: With dead ends: 161 [2021-12-14 11:27:16,013 INFO L226 Difference]: Without dead ends: 155 [2021-12-14 11:27:16,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 30 SyntacticMatches, 24 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9211 ImplicationChecksByTransitivity, 32.1s TimeCoverageRelationStatistics Valid=1317, Invalid=28785, Unknown=0, NotChecked=0, Total=30102 [2021-12-14 11:27:16,021 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 75 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 1631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1049 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 11:27:16,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 227 Invalid, 1631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 553 Invalid, 0 Unknown, 1049 Unchecked, 0.3s Time] [2021-12-14 11:27:16,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-12-14 11:27:16,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 101. [2021-12-14 11:27:16,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.16) internal successors, (116), 100 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:27:16,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 116 transitions. [2021-12-14 11:27:16,039 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 116 transitions. Word has length 59 [2021-12-14 11:27:16,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:27:16,041 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 116 transitions. [2021-12-14 11:27:16,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 1.4083333333333334) internal successors, (169), 120 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:27:16,042 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 116 transitions. [2021-12-14 11:27:16,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-14 11:27:16,042 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:27:16,043 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 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] [2021-12-14 11:27:16,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 11:27:16,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:27:16,244 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:27:16,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:27:16,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1580077422, now seen corresponding path program 4 times [2021-12-14 11:27:16,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:27:16,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877902902] [2021-12-14 11:27:16,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:27:16,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:27:16,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:27:16,309 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-14 11:27:16,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:27:16,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877902902] [2021-12-14 11:27:16,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877902902] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:27:16,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747043879] [2021-12-14 11:27:16,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 11:27:16,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:27:16,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:27:16,312 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) [2021-12-14 11:27:16,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 11:27:16,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 11:27:16,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:27:16,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 11:27:16,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:27:16,520 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-14 11:27:16,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:27:16,621 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-14 11:27:16,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747043879] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:27:16,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:27:16,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-14 11:27:16,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673350829] [2021-12-14 11:27:16,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:27:16,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 11:27:16,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:27:16,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 11:27:16,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-12-14 11:27:16,624 INFO L87 Difference]: Start difference. First operand 101 states and 116 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:27:16,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:27:16,803 INFO L93 Difference]: Finished difference Result 200 states and 230 transitions. [2021-12-14 11:27:16,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 11:27:16,806 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-14 11:27:16,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:27:16,807 INFO L225 Difference]: With dead ends: 200 [2021-12-14 11:27:16,807 INFO L226 Difference]: Without dead ends: 104 [2021-12-14 11:27:16,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-12-14 11:27:16,809 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 77 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:27:16,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 83 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:27:16,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-14 11:27:16,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-12-14 11:27:16,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1568627450980393) internal successors, (118), 102 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:27:16,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2021-12-14 11:27:16,821 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 61 [2021-12-14 11:27:16,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:27:16,821 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2021-12-14 11:27:16,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:27:16,821 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2021-12-14 11:27:16,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-14 11:27:16,822 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:27:16,822 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 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] [2021-12-14 11:27:16,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 11:27:17,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:27:17,036 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:27:17,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:27:17,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1107378484, now seen corresponding path program 5 times [2021-12-14 11:27:17,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:27:17,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249833888] [2021-12-14 11:27:17,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:27:17,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:27:17,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:27:17,097 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-14 11:27:17,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:27:17,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249833888] [2021-12-14 11:27:17,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249833888] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:27:17,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935796850] [2021-12-14 11:27:17,098 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 11:27:17,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:27:17,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:27:17,100 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) [2021-12-14 11:27:17,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 11:27:17,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-14 11:27:17,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:27:17,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 11:27:17,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:27:17,336 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-14 11:27:17,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:27:17,438 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-14 11:27:17,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935796850] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:27:17,438 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:27:17,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2021-12-14 11:27:17,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338066423] [2021-12-14 11:27:17,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:27:17,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-14 11:27:17,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:27:17,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-14 11:27:17,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-12-14 11:27:17,440 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 19 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:27:17,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:27:17,705 INFO L93 Difference]: Finished difference Result 167 states and 195 transitions. [2021-12-14 11:27:17,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 11:27:17,706 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 19 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-14 11:27:17,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:27:17,706 INFO L225 Difference]: With dead ends: 167 [2021-12-14 11:27:17,706 INFO L226 Difference]: Without dead ends: 86 [2021-12-14 11:27:17,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-12-14 11:27:17,710 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 223 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 11:27:17,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 55 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 11:27:17,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-14 11:27:17,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2021-12-14 11:27:17,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 77 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:27:17,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2021-12-14 11:27:17,729 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 63 [2021-12-14 11:27:17,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:27:17,731 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2021-12-14 11:27:17,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 19 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:27:17,732 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2021-12-14 11:27:17,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-14 11:27:17,736 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:27:17,736 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:27:17,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 11:27:17,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:27:17,951 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:27:17,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:27:17,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1152417058, now seen corresponding path program 6 times [2021-12-14 11:27:17,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:27:17,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027888464] [2021-12-14 11:27:17,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:27:17,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:27:18,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:27:21,555 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:27:21,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:27:21,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027888464] [2021-12-14 11:27:21,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027888464] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:27:21,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19258016] [2021-12-14 11:27:21,556 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 11:27:21,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:27:21,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:27:21,561 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) [2021-12-14 11:27:21,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 11:27:21,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-14 11:27:21,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:27:21,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 112 conjunts are in the unsatisfiable core [2021-12-14 11:27:21,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:27:27,513 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:27:27,513 INFO L328 TraceCheckSpWp]: Computing backward predicates...