./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/sum02-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/bitvector/sum02-2.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 80bce81184682208d15520c2d0ae5d9c5f1236c4de557bfddd91c6f88a04aad8 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 10:18:44,229 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 10:18:44,231 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 10:18:44,291 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 10:18:44,296 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 10:18:44,297 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 10:18:44,298 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 10:18:44,300 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 10:18:44,301 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 10:18:44,302 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 10:18:44,303 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 10:18:44,304 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 10:18:44,304 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 10:18:44,305 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 10:18:44,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 10:18:44,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 10:18:44,307 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 10:18:44,308 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 10:18:44,309 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 10:18:44,311 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 10:18:44,312 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 10:18:44,313 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 10:18:44,314 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 10:18:44,314 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 10:18:44,316 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 10:18:44,317 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 10:18:44,317 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 10:18:44,318 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 10:18:44,318 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 10:18:44,319 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 10:18:44,319 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 10:18:44,320 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 10:18:44,321 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 10:18:44,321 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 10:18:44,322 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 10:18:44,322 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 10:18:44,323 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 10:18:44,323 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 10:18:44,324 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 10:18:44,325 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 10:18:44,325 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 10:18:44,326 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 10:18:44,343 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 10:18:44,343 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 10:18:44,343 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 10:18:44,344 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 10:18:44,344 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 10:18:44,344 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 10:18:44,345 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 10:18:44,345 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 10:18:44,345 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 10:18:44,346 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 10:18:44,346 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 10:18:44,346 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 10:18:44,346 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 10:18:44,346 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 10:18:44,347 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 10:18:44,347 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 10:18:44,347 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 10:18:44,347 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 10:18:44,348 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 10:18:44,348 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 10:18:44,348 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 10:18:44,348 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 10:18:44,348 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 10:18:44,349 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 10:18:44,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:18:44,349 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 10:18:44,349 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 10:18:44,349 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 10:18:44,350 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 10:18:44,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 10:18:44,350 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 10:18:44,350 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 10:18:44,350 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 10:18:44,351 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 10:18:44,351 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 80bce81184682208d15520c2d0ae5d9c5f1236c4de557bfddd91c6f88a04aad8 [2021-12-21 10:18:44,566 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 10:18:44,586 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 10:18:44,588 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 10:18:44,589 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 10:18:44,590 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 10:18:44,591 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/sum02-2.c [2021-12-21 10:18:44,646 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b2a18d31/3cc0b05efe374dcf8af957917bb360a9/FLAG62ba78b05 [2021-12-21 10:18:45,012 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 10:18:45,013 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/sum02-2.c [2021-12-21 10:18:45,022 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b2a18d31/3cc0b05efe374dcf8af957917bb360a9/FLAG62ba78b05 [2021-12-21 10:18:45,425 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b2a18d31/3cc0b05efe374dcf8af957917bb360a9 [2021-12-21 10:18:45,427 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 10:18:45,428 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 10:18:45,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 10:18:45,431 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 10:18:45,434 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 10:18:45,434 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:18:45" (1/1) ... [2021-12-21 10:18:45,436 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@199317ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:18:45, skipping insertion in model container [2021-12-21 10:18:45,436 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:18:45" (1/1) ... [2021-12-21 10:18:45,442 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 10:18:45,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 10:18:45,640 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/bitvector/sum02-2.c[711,724] [2021-12-21 10:18:45,657 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:18:45,663 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 10:18:45,676 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/bitvector/sum02-2.c[711,724] [2021-12-21 10:18:45,683 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:18:45,700 INFO L208 MainTranslator]: Completed translation [2021-12-21 10:18:45,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:18:45 WrapperNode [2021-12-21 10:18:45,701 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 10:18:45,702 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 10:18:45,703 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 10:18:45,703 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 10:18:45,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:18:45" (1/1) ... [2021-12-21 10:18:45,714 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:18:45" (1/1) ... [2021-12-21 10:18:45,730 INFO L137 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 36 [2021-12-21 10:18:45,730 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 10:18:45,731 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 10:18:45,731 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 10:18:45,732 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 10:18:45,738 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:18:45" (1/1) ... [2021-12-21 10:18:45,739 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:18:45" (1/1) ... [2021-12-21 10:18:45,749 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:18:45" (1/1) ... [2021-12-21 10:18:45,749 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:18:45" (1/1) ... [2021-12-21 10:18:45,758 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:18:45" (1/1) ... [2021-12-21 10:18:45,765 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:18:45" (1/1) ... [2021-12-21 10:18:45,766 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:18:45" (1/1) ... [2021-12-21 10:18:45,769 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 10:18:45,770 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 10:18:45,770 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 10:18:45,770 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 10:18:45,771 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:18:45" (1/1) ... [2021-12-21 10:18:45,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:18:45,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:18:45,800 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) [2021-12-21 10:18:45,826 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 [2021-12-21 10:18:45,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 10:18:45,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 10:18:45,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 10:18:45,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 10:18:45,894 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 10:18:45,895 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 10:18:46,016 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 10:18:46,021 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 10:18:46,022 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 10:18:46,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:18:46 BoogieIcfgContainer [2021-12-21 10:18:46,024 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 10:18:46,025 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 10:18:46,026 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 10:18:46,029 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 10:18:46,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:18:45" (1/3) ... [2021-12-21 10:18:46,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@85054b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:18:46, skipping insertion in model container [2021-12-21 10:18:46,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:18:45" (2/3) ... [2021-12-21 10:18:46,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@85054b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:18:46, skipping insertion in model container [2021-12-21 10:18:46,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:18:46" (3/3) ... [2021-12-21 10:18:46,032 INFO L111 eAbstractionObserver]: Analyzing ICFG sum02-2.c [2021-12-21 10:18:46,036 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 10:18:46,036 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 10:18:46,080 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 10:18:46,088 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 [2021-12-21 10:18:46,088 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 10:18:46,103 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:18:46,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-21 10:18:46,109 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:18:46,109 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:18:46,110 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:18:46,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:18:46,115 INFO L85 PathProgramCache]: Analyzing trace with hash 119658891, now seen corresponding path program 1 times [2021-12-21 10:18:46,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:18:46,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845384924] [2021-12-21 10:18:46,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:18:46,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:18:46,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:18:46,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:18:46,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:18:46,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845384924] [2021-12-21 10:18:46,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845384924] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:18:46,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:18:46,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:18:46,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335952798] [2021-12-21 10:18:46,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:18:46,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 10:18:46,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:18:46,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 10:18:46,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 10:18:46,316 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 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 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:18:46,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:18:46,326 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2021-12-21 10:18:46,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 10:18:46,327 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-12-21 10:18:46,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:18:46,332 INFO L225 Difference]: With dead ends: 25 [2021-12-21 10:18:46,332 INFO L226 Difference]: Without dead ends: 10 [2021-12-21 10:18:46,335 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 [2021-12-21 10:18:46,340 INFO L933 BasicCegarLoop]: 14 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, 14 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 [2021-12-21 10:18:46,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:18:46,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-12-21 10:18:46,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-12-21 10:18:46,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:18:46,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-12-21 10:18:46,367 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2021-12-21 10:18:46,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:18:46,368 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-12-21 10:18:46,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:18:46,368 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-12-21 10:18:46,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-21 10:18:46,369 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:18:46,369 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:18:46,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 10:18:46,370 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:18:46,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:18:46,372 INFO L85 PathProgramCache]: Analyzing trace with hash 176738447, now seen corresponding path program 1 times [2021-12-21 10:18:46,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:18:46,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004742798] [2021-12-21 10:18:46,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:18:46,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:18:46,402 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:18:46,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [410773] [2021-12-21 10:18:46,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:18:46,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:18:46,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:18:46,408 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) [2021-12-21 10:18:46,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 10:18:46,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:18:46,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 10:18:46,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:18:46,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:18:46,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:18:46,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:18:46,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004742798] [2021-12-21 10:18:46,520 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:18:46,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410773] [2021-12-21 10:18:46,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410773] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:18:46,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:18:46,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:18:46,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021431702] [2021-12-21 10:18:46,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:18:46,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:18:46,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:18:46,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:18:46,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:18:46,529 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:18:46,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:18:46,542 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2021-12-21 10:18:46,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:18:46,594 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-12-21 10:18:46,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:18:46,595 INFO L225 Difference]: With dead ends: 16 [2021-12-21 10:18:46,595 INFO L226 Difference]: Without dead ends: 12 [2021-12-21 10:18:46,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:18:46,596 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 1 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:18:46,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 13 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:18:46,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-12-21 10:18:46,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-12-21 10:18:46,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:18:46,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-12-21 10:18:46,601 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2021-12-21 10:18:46,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:18:46,602 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-12-21 10:18:46,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:18:46,602 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-12-21 10:18:46,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-21 10:18:46,602 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:18:46,602 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:18:46,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 10:18:46,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:18:46,816 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:18:46,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:18:46,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1899811727, now seen corresponding path program 1 times [2021-12-21 10:18:46,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:18:46,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600739751] [2021-12-21 10:18:46,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:18:46,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:18:46,839 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:18:46,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [517774168] [2021-12-21 10:18:46,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:18:46,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:18:46,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:18:46,843 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) [2021-12-21 10:18:46,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 10:18:46,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:18:46,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-21 10:18:46,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:18:46,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:18:46,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:18:47,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:18:47,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:18:47,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600739751] [2021-12-21 10:18:47,217 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:18:47,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517774168] [2021-12-21 10:18:47,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517774168] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:18:47,217 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 10:18:47,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-12-21 10:18:47,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371266274] [2021-12-21 10:18:47,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 10:18:47,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 10:18:47,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:18:47,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 10:18:47,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:18:47,219 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:18:49,260 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-21 10:18:51,314 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-21 10:18:53,371 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-21 10:18:53,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:18:53,427 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2021-12-21 10:18:53,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 10:18:53,428 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 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 10 [2021-12-21 10:18:53,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:18:53,428 INFO L225 Difference]: With dead ends: 17 [2021-12-21 10:18:53,428 INFO L226 Difference]: Without dead ends: 13 [2021-12-21 10:18:53,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-21 10:18:53,430 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:18:53,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 26 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 3 Unknown, 0 Unchecked, 6.2s Time] [2021-12-21 10:18:53,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-12-21 10:18:53,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-12-21 10:18:53,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:18:53,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-12-21 10:18:53,434 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2021-12-21 10:18:53,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:18:53,434 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-12-21 10:18:53,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:18:53,434 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-12-21 10:18:53,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-21 10:18:53,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:18:53,435 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:18:53,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-21 10:18:53,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-21 10:18:53,636 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:18:53,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:18:53,636 INFO L85 PathProgramCache]: Analyzing trace with hash -304736301, now seen corresponding path program 2 times [2021-12-21 10:18:53,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:18:53,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804060156] [2021-12-21 10:18:53,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:18:53,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:18:53,650 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:18:53,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [976783019] [2021-12-21 10:18:53,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 10:18:53,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:18:53,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:18:53,658 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) [2021-12-21 10:18:53,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process