/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/reducercommutativity/rangesum60.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 20:43:58,207 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 20:43:58,209 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 20:43:58,244 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 20:43:58,244 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 20:43:58,246 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 20:43:58,249 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 20:43:58,251 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 20:43:58,252 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 20:43:58,255 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 20:43:58,256 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 20:43:58,256 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 20:43:58,256 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 20:43:58,257 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 20:43:58,257 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 20:43:58,258 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 20:43:58,258 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 20:43:58,259 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 20:43:58,260 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 20:43:58,261 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 20:43:58,261 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 20:43:58,263 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 20:43:58,265 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 20:43:58,266 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 20:43:58,276 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 20:43:58,276 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 20:43:58,276 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 20:43:58,277 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 20:43:58,277 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 20:43:58,278 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 20:43:58,278 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 20:43:58,279 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 20:43:58,280 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 20:43:58,280 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 20:43:58,281 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 20:43:58,281 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 20:43:58,281 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 20:43:58,281 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 20:43:58,281 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 20:43:58,282 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 20:43:58,282 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 20:43:58,283 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 20:43:58,304 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 20:43:58,304 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 20:43:58,305 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 20:43:58,305 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 20:43:58,305 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 20:43:58,305 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 20:43:58,306 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 20:43:58,306 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 20:43:58,306 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 20:43:58,306 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 20:43:58,306 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 20:43:58,307 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 20:43:58,307 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 20:43:58,307 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 20:43:58,307 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 20:43:58,307 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 20:43:58,307 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 20:43:58,307 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 20:43:58,308 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 20:43:58,308 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 20:43:58,308 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 20:43:58,308 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 20:43:58,308 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 20:43:58,308 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 20:43:58,308 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 20:43:58,308 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 20:43:58,309 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 20:43:58,309 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 20:43:58,309 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 20:43:58,309 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 20:43:58,309 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 20:43:58,309 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 20:43:58,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:43:58,309 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 20:43:58,309 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 20:43:58,310 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 20:43:58,310 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 20:43:58,310 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 20:43:58,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 20:43:58,310 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 20:43:58,310 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 20:43:58,310 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 20:43:58,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 20:43:58,501 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 20:43:58,503 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 20:43:58,503 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 20:43:58,504 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 20:43:58,504 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum60.i [2023-03-31 20:43:59,478 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 20:43:59,594 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 20:43:59,594 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum60.i [2023-03-31 20:43:59,598 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dc2d68ba/e2714629ff084a5e8572e0ffbd427f84/FLAG72a12d28e [2023-03-31 20:43:59,608 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dc2d68ba/e2714629ff084a5e8572e0ffbd427f84 [2023-03-31 20:43:59,610 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 20:43:59,611 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 20:43:59,612 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 20:43:59,612 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 20:43:59,614 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 20:43:59,615 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:43:59" (1/1) ... [2023-03-31 20:43:59,615 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d6a25af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:43:59, skipping insertion in model container [2023-03-31 20:43:59,616 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:43:59" (1/1) ... [2023-03-31 20:43:59,620 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 20:43:59,629 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 20:43:59,725 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum60.i[1465,1478] [2023-03-31 20:43:59,727 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:43:59,732 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 20:43:59,745 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum60.i[1465,1478] [2023-03-31 20:43:59,745 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:43:59,753 INFO L208 MainTranslator]: Completed translation [2023-03-31 20:43:59,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:43:59 WrapperNode [2023-03-31 20:43:59,754 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 20:43:59,754 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 20:43:59,754 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 20:43:59,754 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 20:43:59,763 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:43:59" (1/1) ... [2023-03-31 20:43:59,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:43:59" (1/1) ... [2023-03-31 20:43:59,776 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:43:59" (1/1) ... [2023-03-31 20:43:59,776 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:43:59" (1/1) ... [2023-03-31 20:43:59,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:43:59" (1/1) ... [2023-03-31 20:43:59,790 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:43:59" (1/1) ... [2023-03-31 20:43:59,791 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:43:59" (1/1) ... [2023-03-31 20:43:59,791 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:43:59" (1/1) ... [2023-03-31 20:43:59,793 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 20:43:59,793 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 20:43:59,793 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 20:43:59,793 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 20:43:59,794 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:43:59" (1/1) ... [2023-03-31 20:43:59,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:43:59,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:43:59,816 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) [2023-03-31 20:43:59,822 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 [2023-03-31 20:43:59,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 20:43:59,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 20:43:59,856 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 20:43:59,856 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2023-03-31 20:43:59,859 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2023-03-31 20:43:59,859 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 20:43:59,859 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 20:43:59,859 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 20:43:59,859 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-31 20:43:59,860 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-31 20:43:59,860 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 20:43:59,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 20:43:59,860 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 20:43:59,860 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2023-03-31 20:43:59,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 20:43:59,860 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2023-03-31 20:43:59,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 20:43:59,860 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 20:43:59,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 20:43:59,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 20:43:59,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 20:43:59,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 20:43:59,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 20:43:59,919 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 20:43:59,922 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 20:44:00,045 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 20:44:00,106 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 20:44:00,106 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-03-31 20:44:00,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:44:00 BoogieIcfgContainer [2023-03-31 20:44:00,108 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 20:44:00,110 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 20:44:00,110 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 20:44:00,112 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 20:44:00,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 08:43:59" (1/3) ... [2023-03-31 20:44:00,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22d81a74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:44:00, skipping insertion in model container [2023-03-31 20:44:00,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:43:59" (2/3) ... [2023-03-31 20:44:00,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22d81a74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:44:00, skipping insertion in model container [2023-03-31 20:44:00,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:44:00" (3/3) ... [2023-03-31 20:44:00,114 INFO L112 eAbstractionObserver]: Analyzing ICFG rangesum60.i [2023-03-31 20:44:00,131 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 20:44:00,132 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 20:44:00,161 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 20:44:00,166 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@27f98345, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 20:44:00,166 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 20:44:00,169 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 20:44:00,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-03-31 20:44:00,173 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:44:00,174 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:44:00,174 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:44:00,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:44:00,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1265445411, now seen corresponding path program 1 times [2023-03-31 20:44:00,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:44:00,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676798930] [2023-03-31 20:44:00,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:44:00,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:44:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:44:00,280 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:44:00,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676798930] [2023-03-31 20:44:00,280 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-03-31 20:44:00,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570634860] [2023-03-31 20:44:00,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:44:00,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:44:00,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:44:00,283 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) [2023-03-31 20:44:00,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 20:44:00,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:44:00,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 2 conjunts are in the unsatisfiable core [2023-03-31 20:44:00,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:44:00,410 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 20:44:00,410 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 20:44:00,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570634860] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:44:00,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:44:00,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 20:44:00,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574037467] [2023-03-31 20:44:00,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:44:00,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 20:44:00,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:44:00,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 20:44:00,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 20:44:00,434 INFO L87 Difference]: Start difference. First operand has 27 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-31 20:44:00,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:44:00,467 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2023-03-31 20:44:00,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 20:44:00,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 28 [2023-03-31 20:44:00,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:44:00,473 INFO L225 Difference]: With dead ends: 47 [2023-03-31 20:44:00,473 INFO L226 Difference]: Without dead ends: 24 [2023-03-31 20:44:00,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 20:44:00,477 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:44:00,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:44:00,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-03-31 20:44:00,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-03-31 20:44:00,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 20:44:00,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-03-31 20:44:00,502 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 28 [2023-03-31 20:44:00,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:44:00,502 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-03-31 20:44:00,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-31 20:44:00,502 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-03-31 20:44:00,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-03-31 20:44:00,504 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:44:00,504 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 20:44:00,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 20:44:00,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-03-31 20:44:00,711 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:44:00,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:44:00,713 INFO L85 PathProgramCache]: Analyzing trace with hash 2029022752, now seen corresponding path program 1 times [2023-03-31 20:44:00,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:44:00,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182670405] [2023-03-31 20:44:00,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:44:00,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:44:00,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:44:00,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:44:00,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182670405] [2023-03-31 20:44:00,789 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-03-31 20:44:00,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172852230] [2023-03-31 20:44:00,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:44:00,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:44:00,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:44:00,796 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) [2023-03-31 20:44:00,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 20:44:00,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:44:00,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 2 conjunts are in the unsatisfiable core [2023-03-31 20:44:00,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:44:00,864 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 20:44:00,865 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 20:44:00,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172852230] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:44:00,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:44:00,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 20:44:00,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503201592] [2023-03-31 20:44:00,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:44:00,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 20:44:00,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:44:00,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 20:44:00,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 20:44:00,867 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-31 20:44:00,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:44:00,880 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2023-03-31 20:44:00,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 20:44:00,880 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 29 [2023-03-31 20:44:00,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:44:00,881 INFO L225 Difference]: With dead ends: 37 [2023-03-31 20:44:00,881 INFO L226 Difference]: Without dead ends: 25 [2023-03-31 20:44:00,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 20:44:00,882 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:44:00,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:44:00,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-03-31 20:44:00,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-03-31 20:44:00,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 20:44:00,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-03-31 20:44:00,886 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 29 [2023-03-31 20:44:00,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:44:00,887 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-03-31 20:44:00,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-31 20:44:00,887 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-03-31 20:44:00,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-03-31 20:44:00,888 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:44:00,888 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 20:44:00,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 20:44:01,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-03-31 20:44:01,092 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:44:01,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:44:01,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1530991488, now seen corresponding path program 1 times [2023-03-31 20:44:01,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:44:01,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565629068] [2023-03-31 20:44:01,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:44:01,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:44:01,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:44:01,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:44:01,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565629068] [2023-03-31 20:44:01,121 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-03-31 20:44:01,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603041715] [2023-03-31 20:44:01,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:44:01,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:44:01,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:44:01,128 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) [2023-03-31 20:44:01,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 20:44:01,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:44:01,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 2 conjunts are in the unsatisfiable core [2023-03-31 20:44:01,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:44:01,204 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 20:44:01,204 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 20:44:01,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603041715] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:44:01,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:44:01,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 20:44:01,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902167719] [2023-03-31 20:44:01,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:44:01,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 20:44:01,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:44:01,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 20:44:01,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 20:44:01,206 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-31 20:44:01,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:44:01,218 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2023-03-31 20:44:01,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 20:44:01,218 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2023-03-31 20:44:01,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:44:01,219 INFO L225 Difference]: With dead ends: 35 [2023-03-31 20:44:01,219 INFO L226 Difference]: Without dead ends: 26 [2023-03-31 20:44:01,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 20:44:01,220 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:44:01,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:44:01,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-03-31 20:44:01,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-03-31 20:44:01,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 20:44:01,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-03-31 20:44:01,224 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2023-03-31 20:44:01,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:44:01,225 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-03-31 20:44:01,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-31 20:44:01,225 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-03-31 20:44:01,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-03-31 20:44:01,226 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:44:01,226 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2023-03-31 20:44:01,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-03-31 20:44:01,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:44:01,430 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:44:01,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:44:01,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1156130694, now seen corresponding path program 1 times [2023-03-31 20:44:01,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:44:01,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035682514] [2023-03-31 20:44:01,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:44:01,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:44:01,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:44:01,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:44:01,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035682514] [2023-03-31 20:44:01,452 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-03-31 20:44:01,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408616873] [2023-03-31 20:44:01,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:44:01,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:44:01,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:44:01,453 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) [2023-03-31 20:44:01,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 20:44:01,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:44:01,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 20:44:01,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:44:01,586 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-03-31 20:44:01,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:44:01,639 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-03-31 20:44:01,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408616873] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:44:01,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [277856245] [2023-03-31 20:44:01,655 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-03-31 20:44:01,655 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:44:01,657 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:44:01,661 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:44:01,661 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:44:01,725 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:44:03,136 INFO L197 IcfgInterpreter]: Interpreting procedure init_nondet with input of size 32 for LOIs [2023-03-31 20:44:03,150 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2023-03-31 20:44:03,402 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:44:03,405 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:44:04,159 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '797#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 |main_~#x~0.base|) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 59 main_~i~2) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:44:04,160 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:44:04,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:44:04,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-03-31 20:44:04,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519456777] [2023-03-31 20:44:04,160 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:44:04,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 20:44:04,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:44:04,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 20:44:04,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=496, Unknown=8, NotChecked=0, Total=600 [2023-03-31 20:44:04,162 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-03-31 20:44:04,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:44:04,192 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2023-03-31 20:44:04,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 20:44:04,193 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 33 [2023-03-31 20:44:04,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:44:04,193 INFO L225 Difference]: With dead ends: 46 [2023-03-31 20:44:04,194 INFO L226 Difference]: Without dead ends: 29 [2023-03-31 20:44:04,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=96, Invalid=496, Unknown=8, NotChecked=0, Total=600 [2023-03-31 20:44:04,195 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:44:04,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 77 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:44:04,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-03-31 20:44:04,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-03-31 20:44:04,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 20:44:04,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-03-31 20:44:04,198 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 33 [2023-03-31 20:44:04,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:44:04,198 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-03-31 20:44:04,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-03-31 20:44:04,198 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-03-31 20:44:04,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-03-31 20:44:04,199 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:44:04,199 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2023-03-31 20:44:04,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 20:44:04,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:44:04,406 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:44:04,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:44:04,406 INFO L85 PathProgramCache]: Analyzing trace with hash 526655817, now seen corresponding path program 2 times [2023-03-31 20:44:04,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:44:04,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339191585] [2023-03-31 20:44:04,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:44:04,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:44:04,421 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:44:04,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1867512422] [2023-03-31 20:44:04,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:44:04,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:44:04,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:44:04,422 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) [2023-03-31 20:44:04,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 20:44:04,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-03-31 20:44:04,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:44:04,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 20:44:04,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:44:04,519 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-03-31 20:44:04,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:44:04,539 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-03-31 20:44:04,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:44:04,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339191585] [2023-03-31 20:44:04,539 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:44:04,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867512422] [2023-03-31 20:44:04,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867512422] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:44:04,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1667987484] [2023-03-31 20:44:04,541 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-03-31 20:44:04,541 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:44:04,541 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:44:04,541 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:44:04,541 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:44:04,551 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:44:05,284 INFO L197 IcfgInterpreter]: Interpreting procedure init_nondet with input of size 32 for LOIs [2023-03-31 20:44:05,295 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2023-03-31 20:44:05,462 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:44:05,465 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:44:06,162 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1156#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 |main_~#x~0.base|) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 59 main_~i~2) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:44:06,163 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:44:06,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:44:06,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-03-31 20:44:06,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462872758] [2023-03-31 20:44:06,163 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:44:06,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 20:44:06,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:44:06,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 20:44:06,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=496, Unknown=8, NotChecked=0, Total=600 [2023-03-31 20:44:06,164 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-03-31 20:44:06,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:44:06,178 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2023-03-31 20:44:06,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 20:44:06,178 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 36 [2023-03-31 20:44:06,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:44:06,179 INFO L225 Difference]: With dead ends: 46 [2023-03-31 20:44:06,179 INFO L226 Difference]: Without dead ends: 32 [2023-03-31 20:44:06,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=96, Invalid=496, Unknown=8, NotChecked=0, Total=600 [2023-03-31 20:44:06,180 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:44:06,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:44:06,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-03-31 20:44:06,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-03-31 20:44:06,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 20:44:06,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2023-03-31 20:44:06,183 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 36 [2023-03-31 20:44:06,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:44:06,183 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2023-03-31 20:44:06,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-03-31 20:44:06,183 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2023-03-31 20:44:06,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-03-31 20:44:06,184 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:44:06,184 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 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] [2023-03-31 20:44:06,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 20:44:06,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:44:06,401 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:44:06,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:44:06,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1232812885, now seen corresponding path program 3 times [2023-03-31 20:44:06,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:44:06,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386565320] [2023-03-31 20:44:06,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:44:06,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:44:06,419 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:44:06,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2063427717] [2023-03-31 20:44:06,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 20:44:06,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:44:06,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:44:06,421 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) [2023-03-31 20:44:06,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 20:44:06,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 20:44:06,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:44:06,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 20:44:06,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:44:06,511 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-03-31 20:44:06,511 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:44:06,558 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-03-31 20:44:06,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:44:06,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386565320] [2023-03-31 20:44:06,558 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:44:06,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063427717] [2023-03-31 20:44:06,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063427717] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:44:06,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1831163041] [2023-03-31 20:44:06,560 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-03-31 20:44:06,560 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:44:06,560 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:44:06,560 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:44:06,560 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:44:06,569 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:44:07,224 INFO L197 IcfgInterpreter]: Interpreting procedure init_nondet with input of size 32 for LOIs [2023-03-31 20:44:07,234 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2023-03-31 20:44:07,409 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:44:07,413 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:44:08,132 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1583#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 |main_~#x~0.base|) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 59 main_~i~2) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:44:08,133 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:44:08,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:44:08,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-03-31 20:44:08,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002729016] [2023-03-31 20:44:08,133 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:44:08,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-31 20:44:08,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:44:08,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-31 20:44:08,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=775, Unknown=8, NotChecked=0, Total=930 [2023-03-31 20:44:08,134 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-03-31 20:44:08,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:44:08,173 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2023-03-31 20:44:08,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-31 20:44:08,173 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 45 [2023-03-31 20:44:08,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:44:08,174 INFO L225 Difference]: With dead ends: 58 [2023-03-31 20:44:08,174 INFO L226 Difference]: Without dead ends: 38 [2023-03-31 20:44:08,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=147, Invalid=775, Unknown=8, NotChecked=0, Total=930 [2023-03-31 20:44:08,175 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:44:08,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 58 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:44:08,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-03-31 20:44:08,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-03-31 20:44:08,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 20:44:08,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2023-03-31 20:44:08,178 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 45 [2023-03-31 20:44:08,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:44:08,178 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2023-03-31 20:44:08,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-03-31 20:44:08,178 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2023-03-31 20:44:08,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-03-31 20:44:08,179 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:44:08,179 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 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] [2023-03-31 20:44:08,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-31 20:44:08,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:44:08,379 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:44:08,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:44:08,379 INFO L85 PathProgramCache]: Analyzing trace with hash 508565963, now seen corresponding path program 4 times [2023-03-31 20:44:08,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:44:08,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693928835] [2023-03-31 20:44:08,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:44:08,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:44:08,408 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:44:08,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1430432748] [2023-03-31 20:44:08,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 20:44:08,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:44:08,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:44:08,410 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:44:08,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-31 20:44:08,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:44:08,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-31 20:44:08,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:44:08,544 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-03-31 20:44:08,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:44:08,703 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-03-31 20:44:08,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:44:08,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693928835] [2023-03-31 20:44:08,703 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:44:08,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430432748] [2023-03-31 20:44:08,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430432748] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:44:08,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [731033553] [2023-03-31 20:44:08,706 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-03-31 20:44:08,706 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:44:08,706 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:44:08,706 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:44:08,706 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:44:08,719 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:44:09,392 INFO L197 IcfgInterpreter]: Interpreting procedure init_nondet with input of size 32 for LOIs [2023-03-31 20:44:09,401 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2023-03-31 20:44:09,570 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:44:09,574 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:44:11,030 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2092#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 |main_~#x~0.base|) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 59 main_~i~2) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:44:11,031 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:44:11,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:44:11,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-03-31 20:44:11,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968804187] [2023-03-31 20:44:11,031 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:44:11,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-03-31 20:44:11,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:44:11,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-03-31 20:44:11,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=1441, Unknown=8, NotChecked=0, Total=1806 [2023-03-31 20:44:11,033 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-03-31 20:44:11,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:44:11,094 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2023-03-31 20:44:11,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-03-31 20:44:11,096 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2023-03-31 20:44:11,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:44:11,096 INFO L225 Difference]: With dead ends: 70 [2023-03-31 20:44:11,096 INFO L226 Difference]: Without dead ends: 50 [2023-03-31 20:44:11,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=357, Invalid=1441, Unknown=8, NotChecked=0, Total=1806 [2023-03-31 20:44:11,098 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:44:11,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 96 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:44:11,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-03-31 20:44:11,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-03-31 20:44:11,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 40 states have (on average 1.075) internal successors, (43), 40 states have internal predecessors, (43), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 20:44:11,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2023-03-31 20:44:11,102 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 51 [2023-03-31 20:44:11,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:44:11,102 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2023-03-31 20:44:11,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-03-31 20:44:11,102 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2023-03-31 20:44:11,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-03-31 20:44:11,103 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:44:11,103 INFO L195 NwaCegarLoop]: trace histogram [22, 12, 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] [2023-03-31 20:44:11,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-31 20:44:11,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:44:11,303 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:44:11,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:44:11,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1323058165, now seen corresponding path program 5 times [2023-03-31 20:44:11,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:44:11,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943926036] [2023-03-31 20:44:11,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:44:11,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:44:11,383 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:44:11,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [734288246] [2023-03-31 20:44:11,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:44:11,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:44:11,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:44:11,393 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:44:11,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-31 20:44:11,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 20:44:11,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:44:11,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 20:44:11,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:44:11,557 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2023-03-31 20:44:11,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:44:11,574 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2023-03-31 20:44:11,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:44:11,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943926036] [2023-03-31 20:44:11,574 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:44:11,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734288246] [2023-03-31 20:44:11,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734288246] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:44:11,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [577225696] [2023-03-31 20:44:11,576 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-03-31 20:44:11,576 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:44:11,576 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:44:11,576 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:44:11,576 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:44:11,584 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:44:12,323 INFO L197 IcfgInterpreter]: Interpreting procedure init_nondet with input of size 32 for LOIs [2023-03-31 20:44:12,338 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2023-03-31 20:44:12,499 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:44:12,503 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:44:14,211 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2703#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 |main_~#x~0.base|) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 59 main_~i~2) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:44:14,211 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:44:14,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:44:14,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-03-31 20:44:14,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665089723] [2023-03-31 20:44:14,212 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:44:14,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 20:44:14,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:44:14,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 20:44:14,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=496, Unknown=8, NotChecked=0, Total=600 [2023-03-31 20:44:14,213 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-03-31 20:44:14,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:44:14,240 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2023-03-31 20:44:14,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 20:44:14,242 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 63 [2023-03-31 20:44:14,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:44:14,243 INFO L225 Difference]: With dead ends: 65 [2023-03-31 20:44:14,243 INFO L226 Difference]: Without dead ends: 53 [2023-03-31 20:44:14,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=96, Invalid=496, Unknown=8, NotChecked=0, Total=600 [2023-03-31 20:44:14,244 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:44:14,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:44:14,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-03-31 20:44:14,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-03-31 20:44:14,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 20:44:14,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2023-03-31 20:44:14,248 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 63 [2023-03-31 20:44:14,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:44:14,248 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2023-03-31 20:44:14,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-03-31 20:44:14,248 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2023-03-31 20:44:14,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-03-31 20:44:14,249 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:44:14,249 INFO L195 NwaCegarLoop]: trace histogram [22, 12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:44:14,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-03-31 20:44:14,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-03-31 20:44:14,450 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:44:14,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:44:14,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1441263747, now seen corresponding path program 6 times [2023-03-31 20:44:14,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:44:14,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885694202] [2023-03-31 20:44:14,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:44:14,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:44:14,473 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:44:14,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [232812043] [2023-03-31 20:44:14,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 20:44:14,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:44:14,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:44:14,481 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:44:14,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-31 20:44:14,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 20:44:14,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:44:14,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 24 conjunts are in the unsatisfiable core [2023-03-31 20:44:14,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:44:14,795 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-03-31 20:44:14,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:44:15,314 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-03-31 20:44:15,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:44:15,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885694202] [2023-03-31 20:44:15,314 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:44:15,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232812043] [2023-03-31 20:44:15,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232812043] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:44:15,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [544759671] [2023-03-31 20:44:15,315 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-03-31 20:44:15,316 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:44:15,316 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:44:15,316 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:44:15,316 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:44:15,332 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:44:16,000 INFO L197 IcfgInterpreter]: Interpreting procedure init_nondet with input of size 32 for LOIs [2023-03-31 20:44:16,009 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2023-03-31 20:44:16,168 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:44:16,184 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:44:18,086 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3374#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 |main_~#x~0.base|) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 59 main_~i~2) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:44:18,086 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:44:18,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:44:18,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2023-03-31 20:44:18,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696006296] [2023-03-31 20:44:18,087 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:44:18,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-03-31 20:44:18,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:44:18,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-03-31 20:44:18,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1209, Invalid=3205, Unknown=8, NotChecked=0, Total=4422 [2023-03-31 20:44:18,089 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 48 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 48 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-03-31 20:44:18,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:44:18,149 INFO L93 Difference]: Finished difference Result 100 states and 131 transitions. [2023-03-31 20:44:18,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-03-31 20:44:18,150 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 48 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 66 [2023-03-31 20:44:18,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:44:18,151 INFO L225 Difference]: With dead ends: 100 [2023-03-31 20:44:18,151 INFO L226 Difference]: Without dead ends: 77 [2023-03-31 20:44:18,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1209, Invalid=3205, Unknown=8, NotChecked=0, Total=4422 [2023-03-31 20:44:18,152 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:44:18,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 77 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:44:18,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-03-31 20:44:18,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2023-03-31 20:44:18,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 20:44:18,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2023-03-31 20:44:18,169 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 66 [2023-03-31 20:44:18,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:44:18,169 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2023-03-31 20:44:18,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 48 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-03-31 20:44:18,170 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2023-03-31 20:44:18,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-03-31 20:44:18,170 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:44:18,170 INFO L195 NwaCegarLoop]: trace histogram [46, 12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:44:18,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-03-31 20:44:18,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:44:18,371 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:44:18,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:44:18,371 INFO L85 PathProgramCache]: Analyzing trace with hash -775128061, now seen corresponding path program 7 times [2023-03-31 20:44:18,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:44:18,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271638740] [2023-03-31 20:44:18,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:44:18,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:44:18,433 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:44:18,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2041594724] [2023-03-31 20:44:18,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 20:44:18,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:44:18,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:44:18,437 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:44:18,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-03-31 20:44:18,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:44:18,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 48 conjunts are in the unsatisfiable core [2023-03-31 20:44:18,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:44:19,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1202 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-03-31 20:44:19,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:44:20,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1202 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-03-31 20:44:20,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:44:20,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271638740] [2023-03-31 20:44:20,726 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:44:20,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041594724] [2023-03-31 20:44:20,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041594724] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:44:20,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [24241855] [2023-03-31 20:44:20,727 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-03-31 20:44:20,727 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:44:20,728 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:44:20,728 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:44:20,728 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:44:20,736 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:44:21,439 INFO L197 IcfgInterpreter]: Interpreting procedure init_nondet with input of size 32 for LOIs [2023-03-31 20:44:21,449 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2023-03-31 20:44:21,621 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:44:21,623 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:44:24,234 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4317#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 |main_~#x~0.base|) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 59 main_~i~2) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:44:24,234 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:44:24,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:44:24,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 62 [2023-03-31 20:44:24,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121462687] [2023-03-31 20:44:24,235 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:44:24,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-03-31 20:44:24,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:44:24,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-03-31 20:44:24,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1972, Invalid=4500, Unknown=8, NotChecked=0, Total=6480 [2023-03-31 20:44:24,238 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 62 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 62 states have internal predecessors, (79), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-03-31 20:44:24,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:44:24,294 INFO L93 Difference]: Finished difference Result 114 states and 135 transitions. [2023-03-31 20:44:24,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-03-31 20:44:24,295 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 62 states have internal predecessors, (79), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 90 [2023-03-31 20:44:24,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:44:24,295 INFO L225 Difference]: With dead ends: 114 [2023-03-31 20:44:24,296 INFO L226 Difference]: Without dead ends: 91 [2023-03-31 20:44:24,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 156 SyntacticMatches, 34 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2403 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1972, Invalid=4500, Unknown=8, NotChecked=0, Total=6480 [2023-03-31 20:44:24,297 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:44:24,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 96 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:44:24,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-03-31 20:44:24,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2023-03-31 20:44:24,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 81 states have (on average 1.037037037037037) internal successors, (84), 81 states have internal predecessors, (84), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 20:44:24,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2023-03-31 20:44:24,303 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 90 [2023-03-31 20:44:24,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:44:24,303 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2023-03-31 20:44:24,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 62 states have internal predecessors, (79), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-03-31 20:44:24,303 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2023-03-31 20:44:24,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-03-31 20:44:24,304 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:44:24,304 INFO L195 NwaCegarLoop]: trace histogram [60, 12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:44:24,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-03-31 20:44:24,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-03-31 20:44:24,510 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:44:24,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:44:24,510 INFO L85 PathProgramCache]: Analyzing trace with hash 66799971, now seen corresponding path program 8 times [2023-03-31 20:44:24,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:44:24,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549741855] [2023-03-31 20:44:24,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:44:24,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:44:24,553 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:44:24,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2112447944] [2023-03-31 20:44:24,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:44:24,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:44:24,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:44:24,555 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:44:24,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-03-31 20:44:24,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 20:44:24,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:44:24,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 20:44:24,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:44:24,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1951 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 1889 trivial. 0 not checked. [2023-03-31 20:44:24,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:44:24,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1951 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 1889 trivial. 0 not checked. [2023-03-31 20:44:24,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:44:24,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549741855] [2023-03-31 20:44:24,771 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:44:24,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112447944] [2023-03-31 20:44:24,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112447944] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:44:24,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [161009581] [2023-03-31 20:44:24,774 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-03-31 20:44:24,774 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:44:24,774 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:44:24,775 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:44:24,775 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:44:24,782 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:44:25,665 INFO L197 IcfgInterpreter]: Interpreting procedure init_nondet with input of size 32 for LOIs [2023-03-31 20:44:25,674 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2023-03-31 20:44:25,828 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:44:25,830 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:44:27,678 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5350#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 |main_~#x~0.base|) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 59 main_~i~2) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:44:27,678 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:44:27,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:44:27,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-03-31 20:44:27,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762127351] [2023-03-31 20:44:27,679 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:44:27,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-31 20:44:27,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:44:27,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-31 20:44:27,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=775, Unknown=8, NotChecked=0, Total=930 [2023-03-31 20:44:27,680 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-03-31 20:44:27,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:44:27,696 INFO L93 Difference]: Finished difference Result 117 states and 132 transitions. [2023-03-31 20:44:27,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-31 20:44:27,696 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 104 [2023-03-31 20:44:27,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:44:27,697 INFO L225 Difference]: With dead ends: 117 [2023-03-31 20:44:27,697 INFO L226 Difference]: Without dead ends: 97 [2023-03-31 20:44:27,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=147, Invalid=775, Unknown=8, NotChecked=0, Total=930 [2023-03-31 20:44:27,698 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:44:27,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:44:27,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-03-31 20:44:27,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2023-03-31 20:44:27,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 87 states have internal predecessors, (90), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 20:44:27,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2023-03-31 20:44:27,703 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 104 [2023-03-31 20:44:27,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:44:27,704 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2023-03-31 20:44:27,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-03-31 20:44:27,704 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2023-03-31 20:44:27,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-03-31 20:44:27,705 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:44:27,705 INFO L195 NwaCegarLoop]: trace histogram [60, 30, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:44:27,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-03-31 20:44:27,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-03-31 20:44:27,925 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:44:27,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:44:27,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1573894691, now seen corresponding path program 9 times [2023-03-31 20:44:27,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:44:27,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909999000] [2023-03-31 20:44:27,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:44:27,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:44:27,967 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:44:27,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1381386885] [2023-03-31 20:44:27,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 20:44:27,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:44:27,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:44:27,968 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:44:27,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-03-31 20:44:28,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 20:44:28,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:44:28,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 844 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-31 20:44:28,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:44:28,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2374 backedges. 244 proven. 55 refuted. 0 times theorem prover too weak. 2075 trivial. 0 not checked. [2023-03-31 20:44:28,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:44:28,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2374 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 2075 trivial. 0 not checked. [2023-03-31 20:44:28,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:44:28,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909999000] [2023-03-31 20:44:28,403 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:44:28,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381386885] [2023-03-31 20:44:28,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381386885] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:44:28,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [57017964] [2023-03-31 20:44:28,405 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-03-31 20:44:28,405 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:44:28,405 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:44:28,405 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:44:28,405 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:44:28,413 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:44:29,064 INFO L197 IcfgInterpreter]: Interpreting procedure init_nondet with input of size 32 for LOIs [2023-03-31 20:44:29,090 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2023-03-31 20:44:29,248 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:44:29,250 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:44:31,149 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6523#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 |main_~#x~0.base|) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 59 main_~i~2) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:44:31,149 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:44:31,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:44:31,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-03-31 20:44:31,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777253927] [2023-03-31 20:44:31,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:44:31,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-03-31 20:44:31,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:44:31,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-03-31 20:44:31,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=1441, Unknown=8, NotChecked=0, Total=1806 [2023-03-31 20:44:31,151 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-31 20:44:31,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:44:31,187 INFO L93 Difference]: Finished difference Result 135 states and 156 transitions. [2023-03-31 20:44:31,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-03-31 20:44:31,187 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2023-03-31 20:44:31,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:44:31,188 INFO L225 Difference]: With dead ends: 135 [2023-03-31 20:44:31,188 INFO L226 Difference]: Without dead ends: 109 [2023-03-31 20:44:31,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=357, Invalid=1441, Unknown=8, NotChecked=0, Total=1806 [2023-03-31 20:44:31,189 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:44:31,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 115 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:44:31,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-03-31 20:44:31,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2023-03-31 20:44:31,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 99 states have internal predecessors, (102), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 20:44:31,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2023-03-31 20:44:31,199 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 122 [2023-03-31 20:44:31,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:44:31,199 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2023-03-31 20:44:31,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-31 20:44:31,199 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2023-03-31 20:44:31,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-03-31 20:44:31,200 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:44:31,200 INFO L195 NwaCegarLoop]: trace histogram [66, 60, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:44:31,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-03-31 20:44:31,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-03-31 20:44:31,408 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:44:31,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:44:31,408 INFO L85 PathProgramCache]: Analyzing trace with hash 2117430179, now seen corresponding path program 10 times [2023-03-31 20:44:31,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:44:31,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378519140] [2023-03-31 20:44:31,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:44:31,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:44:31,454 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:44:31,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [868973414] [2023-03-31 20:44:31,455 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 20:44:31,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:44:31,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:44:31,456 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:44:31,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-03-31 20:44:31,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:44:31,701 INFO L262 TraceCheckSpWp]: Trace formula consists of 988 conjuncts, 24 conjunts are in the unsatisfiable core [2023-03-31 20:44:31,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:44:31,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4192 backedges. 1060 proven. 253 refuted. 0 times theorem prover too weak. 2879 trivial. 0 not checked. [2023-03-31 20:44:31,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:44:32,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4192 backedges. 0 proven. 1313 refuted. 0 times theorem prover too weak. 2879 trivial. 0 not checked. [2023-03-31 20:44:32,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:44:32,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378519140] [2023-03-31 20:44:32,414 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:44:32,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868973414] [2023-03-31 20:44:32,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868973414] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:44:32,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [131901704] [2023-03-31 20:44:32,415 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-03-31 20:44:32,415 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:44:32,416 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:44:32,416 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:44:32,416 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:44:32,423 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:44:33,357 INFO L197 IcfgInterpreter]: Interpreting procedure init_nondet with input of size 32 for LOIs [2023-03-31 20:44:33,368 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2023-03-31 20:44:33,557 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:44:33,559 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:44:35,405 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7996#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 |main_~#x~0.base|) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 59 main_~i~2) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:44:35,406 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:44:35,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:44:35,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2023-03-31 20:44:35,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827041412] [2023-03-31 20:44:35,406 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:44:35,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-03-31 20:44:35,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:44:35,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-03-31 20:44:35,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1209, Invalid=3205, Unknown=8, NotChecked=0, Total=4422 [2023-03-31 20:44:35,408 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand has 48 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 48 states have internal predecessors, (67), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-31 20:44:35,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:44:35,473 INFO L93 Difference]: Finished difference Result 171 states and 204 transitions. [2023-03-31 20:44:35,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-03-31 20:44:35,473 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 48 states have internal predecessors, (67), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 158 [2023-03-31 20:44:35,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:44:35,474 INFO L225 Difference]: With dead ends: 171 [2023-03-31 20:44:35,474 INFO L226 Difference]: Without dead ends: 133 [2023-03-31 20:44:35,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1209, Invalid=3205, Unknown=8, NotChecked=0, Total=4422 [2023-03-31 20:44:35,476 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:44:35,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 134 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:44:35,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-03-31 20:44:35,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2023-03-31 20:44:35,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 123 states have (on average 1.024390243902439) internal successors, (126), 123 states have internal predecessors, (126), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 20:44:35,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 137 transitions. [2023-03-31 20:44:35,483 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 137 transitions. Word has length 158 [2023-03-31 20:44:35,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:44:35,484 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 137 transitions. [2023-03-31 20:44:35,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 48 states have internal predecessors, (67), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-31 20:44:35,484 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 137 transitions. [2023-03-31 20:44:35,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2023-03-31 20:44:35,485 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:44:35,485 INFO L195 NwaCegarLoop]: trace histogram [138, 60, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:44:35,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-03-31 20:44:35,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-03-31 20:44:35,702 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:44:35,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:44:35,702 INFO L85 PathProgramCache]: Analyzing trace with hash 363073187, now seen corresponding path program 11 times [2023-03-31 20:44:35,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:44:35,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428274701] [2023-03-31 20:44:35,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:44:35,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:44:35,752 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:44:35,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1463331139] [2023-03-31 20:44:35,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:44:35,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:44:35,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:44:35,770 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:44:35,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-03-31 20:44:36,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-03-31 20:44:36,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:44:36,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 20:44:36,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:44:36,035 INFO L134 CoverageAnalysis]: Checked inductivity of 11716 backedges. 4422 proven. 10 refuted. 0 times theorem prover too weak. 7284 trivial. 0 not checked. [2023-03-31 20:44:36,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:44:36,088 INFO L134 CoverageAnalysis]: Checked inductivity of 11716 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 11706 trivial. 0 not checked. [2023-03-31 20:44:36,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:44:36,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428274701] [2023-03-31 20:44:36,088 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:44:36,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463331139] [2023-03-31 20:44:36,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463331139] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:44:36,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2041974940] [2023-03-31 20:44:36,094 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-03-31 20:44:36,094 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:44:36,094 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:44:36,094 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:44:36,094 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:44:36,101 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:44:36,824 INFO L197 IcfgInterpreter]: Interpreting procedure init_nondet with input of size 32 for LOIs [2023-03-31 20:44:36,834 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2023-03-31 20:44:36,985 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:44:36,987 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:44:38,450 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9985#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 |main_~#x~0.base|) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 59 main_~i~2) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:44:38,450 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:44:38,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:44:38,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-03-31 20:44:38,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235533827] [2023-03-31 20:44:38,452 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:44:38,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-31 20:44:38,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:44:38,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-31 20:44:38,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=775, Unknown=8, NotChecked=0, Total=930 [2023-03-31 20:44:38,461 INFO L87 Difference]: Start difference. First operand 133 states and 137 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-03-31 20:44:38,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:44:38,480 INFO L93 Difference]: Finished difference Result 193 states and 203 transitions. [2023-03-31 20:44:38,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-31 20:44:38,484 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 230 [2023-03-31 20:44:38,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:44:38,484 INFO L225 Difference]: With dead ends: 193 [2023-03-31 20:44:38,485 INFO L226 Difference]: Without dead ends: 139 [2023-03-31 20:44:38,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 689 GetRequests, 660 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=147, Invalid=775, Unknown=8, NotChecked=0, Total=930 [2023-03-31 20:44:38,485 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:44:38,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:44:38,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-03-31 20:44:38,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2023-03-31 20:44:38,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 129 states have (on average 1.0232558139534884) internal successors, (132), 129 states have internal predecessors, (132), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 20:44:38,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 143 transitions. [2023-03-31 20:44:38,510 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 143 transitions. Word has length 230 [2023-03-31 20:44:38,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:44:38,511 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 143 transitions. [2023-03-31 20:44:38,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-03-31 20:44:38,511 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 143 transitions. [2023-03-31 20:44:38,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2023-03-31 20:44:38,525 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:44:38,525 INFO L195 NwaCegarLoop]: trace histogram [138, 60, 10, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:44:38,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-03-31 20:44:38,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:44:38,732 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:44:38,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:44:38,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1190947235, now seen corresponding path program 12 times [2023-03-31 20:44:38,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:44:38,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278725139] [2023-03-31 20:44:38,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:44:38,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:44:38,785 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:44:38,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [446442747] [2023-03-31 20:44:38,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 20:44:38,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:44:38,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:44:38,804 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:44:38,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-03-31 20:44:39,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 20:44:39,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:44:39,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 1318 conjuncts, 48 conjunts are in the unsatisfiable core [2023-03-31 20:44:39,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:44:39,982 INFO L134 CoverageAnalysis]: Checked inductivity of 11761 backedges. 4420 proven. 1081 refuted. 0 times theorem prover too weak. 6260 trivial. 0 not checked. [2023-03-31 20:44:39,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:44:40,838 INFO L134 CoverageAnalysis]: Checked inductivity of 11761 backedges. 0 proven. 5501 refuted. 0 times theorem prover too weak. 6260 trivial. 0 not checked. [2023-03-31 20:44:40,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:44:40,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278725139] [2023-03-31 20:44:40,838 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:44:40,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446442747] [2023-03-31 20:44:40,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446442747] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:44:40,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [119171236] [2023-03-31 20:44:40,840 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-03-31 20:44:40,840 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:44:40,840 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:44:40,840 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:44:40,841 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:44:40,850 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:44:41,640 INFO L197 IcfgInterpreter]: Interpreting procedure init_nondet with input of size 32 for LOIs [2023-03-31 20:44:41,655 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2023-03-31 20:44:41,806 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:44:41,808 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:44:44,649 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12118#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 |main_~#x~0.base|) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 59 main_~i~2) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:44:44,650 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:44:44,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:44:44,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 62 [2023-03-31 20:44:44,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267613549] [2023-03-31 20:44:44,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:44:44,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-03-31 20:44:44,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:44:44,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-03-31 20:44:44,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1972, Invalid=4500, Unknown=8, NotChecked=0, Total=6480 [2023-03-31 20:44:44,652 INFO L87 Difference]: Start difference. First operand 139 states and 143 transitions. Second operand has 62 states, 62 states have (on average 1.3225806451612903) internal successors, (82), 62 states have internal predecessors, (82), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-31 20:44:44,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:44:44,715 INFO L93 Difference]: Finished difference Result 221 states and 244 transitions. [2023-03-31 20:44:44,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-03-31 20:44:44,715 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.3225806451612903) internal successors, (82), 62 states have internal predecessors, (82), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 236 [2023-03-31 20:44:44,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:44:44,716 INFO L225 Difference]: With dead ends: 221 [2023-03-31 20:44:44,716 INFO L226 Difference]: Without dead ends: 153 [2023-03-31 20:44:44,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 707 GetRequests, 594 SyntacticMatches, 34 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2403 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1972, Invalid=4500, Unknown=8, NotChecked=0, Total=6480 [2023-03-31 20:44:44,717 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:44:44,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 153 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:44:44,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-03-31 20:44:44,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2023-03-31 20:44:44,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 143 states have (on average 1.020979020979021) internal successors, (146), 143 states have internal predecessors, (146), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 20:44:44,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 157 transitions. [2023-03-31 20:44:44,722 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 157 transitions. Word has length 236 [2023-03-31 20:44:44,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:44:44,722 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 157 transitions. [2023-03-31 20:44:44,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.3225806451612903) internal successors, (82), 62 states have internal predecessors, (82), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-03-31 20:44:44,722 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 157 transitions. [2023-03-31 20:44:44,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2023-03-31 20:44:44,723 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:44:44,723 INFO L195 NwaCegarLoop]: trace histogram [180, 60, 10, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:44:44,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-03-31 20:44:44,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-03-31 20:44:44,924 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:44:44,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:44:44,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1561846941, now seen corresponding path program 13 times [2023-03-31 20:44:44,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:44:44,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719632235] [2023-03-31 20:44:44,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:44:44,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:44:44,981 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:44:44,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1330937964] [2023-03-31 20:44:44,981 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 20:44:44,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:44:44,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:44:44,982 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:44:44,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-03-31 20:44:45,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:44:45,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 1486 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-31 20:44:45,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:44:45,441 INFO L134 CoverageAnalysis]: Checked inductivity of 18544 backedges. 7446 proven. 55 refuted. 0 times theorem prover too weak. 11043 trivial. 0 not checked. [2023-03-31 20:44:45,441 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:44:45,584 INFO L134 CoverageAnalysis]: Checked inductivity of 18544 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 18489 trivial. 0 not checked. [2023-03-31 20:44:45,584 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:44:45,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719632235] [2023-03-31 20:44:45,585 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:44:45,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330937964] [2023-03-31 20:44:45,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330937964] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:44:45,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [858175034] [2023-03-31 20:44:45,586 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-03-31 20:44:45,586 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:44:45,586 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:44:45,586 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:44:45,586 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:44:45,593 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:44:46,192 INFO L197 IcfgInterpreter]: Interpreting procedure init_nondet with input of size 32 for LOIs [2023-03-31 20:44:46,200 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2023-03-31 20:44:46,350 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:44:46,352 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:44:48,187 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14547#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 |main_~#x~0.base|) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 59 main_~i~2) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:44:48,187 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:44:48,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:44:48,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-03-31 20:44:48,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063291356] [2023-03-31 20:44:48,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:44:48,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-03-31 20:44:48,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:44:48,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-03-31 20:44:48,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=1441, Unknown=8, NotChecked=0, Total=1806 [2023-03-31 20:44:48,189 INFO L87 Difference]: Start difference. First operand 153 states and 157 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-03-31 20:44:48,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:44:48,225 INFO L93 Difference]: Finished difference Result 233 states and 249 transitions. [2023-03-31 20:44:48,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-03-31 20:44:48,228 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 278 [2023-03-31 20:44:48,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:44:48,228 INFO L225 Difference]: With dead ends: 233 [2023-03-31 20:44:48,228 INFO L226 Difference]: Without dead ends: 165 [2023-03-31 20:44:48,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 833 GetRequests, 792 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=357, Invalid=1441, Unknown=8, NotChecked=0, Total=1806 [2023-03-31 20:44:48,229 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:44:48,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 115 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:44:48,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-03-31 20:44:48,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2023-03-31 20:44:48,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 155 states have (on average 1.0193548387096774) internal successors, (158), 155 states have internal predecessors, (158), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 20:44:48,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 169 transitions. [2023-03-31 20:44:48,234 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 169 transitions. Word has length 278 [2023-03-31 20:44:48,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:44:48,234 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 169 transitions. [2023-03-31 20:44:48,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-03-31 20:44:48,234 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 169 transitions. [2023-03-31 20:44:48,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2023-03-31 20:44:48,235 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:44:48,235 INFO L195 NwaCegarLoop]: trace histogram [180, 60, 22, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:44:48,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-03-31 20:44:48,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-03-31 20:44:48,444 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:44:48,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:44:48,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1784073885, now seen corresponding path program 14 times [2023-03-31 20:44:48,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:44:48,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644876794] [2023-03-31 20:44:48,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:44:48,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:44:48,541 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:44:48,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [54895478] [2023-03-31 20:44:48,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:44:48,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:44:48,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:44:48,543 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:44:48,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-03-31 20:45:04,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-03-31 20:45:04,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:45:04,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 45 conjunts are in the unsatisfiable core [2023-03-31 20:45:04,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:45:04,445 INFO L134 CoverageAnalysis]: Checked inductivity of 18742 backedges. 7506 proven. 253 refuted. 0 times theorem prover too weak. 10983 trivial. 0 not checked. [2023-03-31 20:45:04,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:45:05,079 INFO L134 CoverageAnalysis]: Checked inductivity of 18742 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 18489 trivial. 0 not checked. [2023-03-31 20:45:05,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:45:05,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644876794] [2023-03-31 20:45:05,079 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:45:05,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54895478] [2023-03-31 20:45:05,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54895478] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:45:05,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1271836767] [2023-03-31 20:45:05,080 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-03-31 20:45:05,080 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:45:05,081 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:45:05,081 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:45:05,081 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:45:05,088 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:45:05,765 INFO L197 IcfgInterpreter]: Interpreting procedure init_nondet with input of size 32 for LOIs [2023-03-31 20:45:05,773 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2023-03-31 20:45:05,925 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:45:05,927 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:45:08,151 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17123#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 |main_~#x~0.base|) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 59 main_~i~2) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:45:08,151 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:45:08,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:45:08,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2023-03-31 20:45:08,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375019591] [2023-03-31 20:45:08,151 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:45:08,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-03-31 20:45:08,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:45:08,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-03-31 20:45:08,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1211, Invalid=3337, Unknown=8, NotChecked=0, Total=4556 [2023-03-31 20:45:08,154 INFO L87 Difference]: Start difference. First operand 165 states and 169 transitions. Second operand has 49 states, 49 states have (on average 1.346938775510204) internal successors, (66), 49 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-03-31 20:45:08,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:45:08,207 INFO L93 Difference]: Finished difference Result 257 states and 285 transitions. [2023-03-31 20:45:08,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-03-31 20:45:08,207 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.346938775510204) internal successors, (66), 49 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 290 [2023-03-31 20:45:08,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:45:08,208 INFO L225 Difference]: With dead ends: 257 [2023-03-31 20:45:08,208 INFO L226 Difference]: Without dead ends: 189 [2023-03-31 20:45:08,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 869 GetRequests, 803 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1211, Invalid=3337, Unknown=8, NotChecked=0, Total=4556 [2023-03-31 20:45:08,208 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 1 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:45:08,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 172 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:45:08,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-03-31 20:45:08,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2023-03-31 20:45:08,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 179 states have (on average 1.0167597765363128) internal successors, (182), 179 states have internal predecessors, (182), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 20:45:08,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 193 transitions. [2023-03-31 20:45:08,214 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 193 transitions. Word has length 290 [2023-03-31 20:45:08,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:45:08,214 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 193 transitions. [2023-03-31 20:45:08,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.346938775510204) internal successors, (66), 49 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-03-31 20:45:08,214 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 193 transitions. [2023-03-31 20:45:08,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2023-03-31 20:45:08,215 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:45:08,215 INFO L195 NwaCegarLoop]: trace histogram [180, 60, 46, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:45:08,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-03-31 20:45:08,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-03-31 20:45:08,436 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:45:08,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:45:08,436 INFO L85 PathProgramCache]: Analyzing trace with hash -673686173, now seen corresponding path program 15 times [2023-03-31 20:45:08,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:45:08,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148647011] [2023-03-31 20:45:08,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:45:08,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:45:08,566 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:45:08,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [827800975] [2023-03-31 20:45:08,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 20:45:08,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:45:08,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:45:08,567 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:45:08,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-03-31 20:45:09,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 20:45:09,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:45:09,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 1738 conjuncts, 48 conjunts are in the unsatisfiable core [2023-03-31 20:45:09,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:45:09,809 INFO L134 CoverageAnalysis]: Checked inductivity of 19570 backedges. 7446 proven. 1081 refuted. 0 times theorem prover too weak. 11043 trivial. 0 not checked. [2023-03-31 20:45:09,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:45:10,907 INFO L134 CoverageAnalysis]: Checked inductivity of 19570 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 18489 trivial. 0 not checked. [2023-03-31 20:45:10,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:45:10,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148647011] [2023-03-31 20:45:10,908 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:45:10,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827800975] [2023-03-31 20:45:10,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827800975] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:45:10,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [764802639] [2023-03-31 20:45:10,910 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-03-31 20:45:10,911 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:45:10,911 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:45:10,911 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:45:10,911 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:45:10,921 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:45:11,608 INFO L197 IcfgInterpreter]: Interpreting procedure init_nondet with input of size 32 for LOIs [2023-03-31 20:45:11,617 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 12 for LOIs [2023-03-31 20:45:11,773 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:45:11,775 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:45:14,629 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19951#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= main_~ret~1 2147483647) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= 0 |main_~#x~0.base|) (<= 0 (+ main_~ret~1 2147483648)) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 59 main_~i~2) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:45:14,629 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:45:14,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:45:14,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 61 [2023-03-31 20:45:14,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223658464] [2023-03-31 20:45:14,629 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:45:14,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-03-31 20:45:14,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:45:14,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-03-31 20:45:14,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1911, Invalid=4401, Unknown=8, NotChecked=0, Total=6320 [2023-03-31 20:45:14,631 INFO L87 Difference]: Start difference. First operand 189 states and 193 transitions. Second operand has 61 states, 61 states have (on average 1.278688524590164) internal successors, (78), 61 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-03-31 20:45:14,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:45:14,729 INFO L93 Difference]: Finished difference Result 270 states and 287 transitions. [2023-03-31 20:45:14,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-03-31 20:45:14,730 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.278688524590164) internal successors, (78), 61 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 314 [2023-03-31 20:45:14,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:45:14,731 INFO L225 Difference]: With dead ends: 270 [2023-03-31 20:45:14,731 INFO L226 Difference]: Without dead ends: 202 [2023-03-31 20:45:14,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 941 GetRequests, 828 SyntacticMatches, 35 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2377 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1911, Invalid=4401, Unknown=8, NotChecked=0, Total=6320 [2023-03-31 20:45:14,732 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:45:14,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 153 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:45:14,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2023-03-31 20:45:14,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2023-03-31 20:45:14,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 192 states have (on average 1.015625) internal successors, (195), 192 states have internal predecessors, (195), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 20:45:14,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 206 transitions. [2023-03-31 20:45:14,738 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 206 transitions. Word has length 314 [2023-03-31 20:45:14,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:45:14,738 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 206 transitions. [2023-03-31 20:45:14,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.278688524590164) internal successors, (78), 61 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-03-31 20:45:14,738 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 206 transitions. [2023-03-31 20:45:14,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2023-03-31 20:45:14,739 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:45:14,739 INFO L195 NwaCegarLoop]: trace histogram [180, 60, 59, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:45:14,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-03-31 20:45:14,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-03-31 20:45:14,956 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:45:14,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:45:14,956 INFO L85 PathProgramCache]: Analyzing trace with hash -958617813, now seen corresponding path program 16 times [2023-03-31 20:45:14,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:45:14,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826898450] [2023-03-31 20:45:14,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:45:14,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:45:15,064 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:45:15,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1166594744] [2023-03-31 20:45:15,064 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 20:45:15,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:45:15,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:45:15,065 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:45:15,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process