/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 EqDomain -i ../sv-benchmarks/c/reducercommutativity/sum20-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 08:50:00,474 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 08:50:00,476 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 08:50:00,516 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 08:50:00,517 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 08:50:00,519 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 08:50:00,522 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 08:50:00,524 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 08:50:00,526 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 08:50:00,530 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 08:50:00,531 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 08:50:00,533 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 08:50:00,533 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 08:50:00,535 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 08:50:00,536 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 08:50:00,537 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 08:50:00,538 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 08:50:00,538 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 08:50:00,540 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 08:50:00,544 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 08:50:00,545 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 08:50:00,546 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 08:50:00,547 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 08:50:00,548 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 08:50:00,556 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 08:50:00,556 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 08:50:00,556 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 08:50:00,557 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 08:50:00,558 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 08:50:00,558 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 08:50:00,558 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 08:50:00,559 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 08:50:00,560 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 08:50:00,561 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 08:50:00,561 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 08:50:00,561 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 08:50:00,562 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 08:50:00,562 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 08:50:00,562 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 08:50:00,563 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 08:50:00,563 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 08:50:00,565 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 [2023-04-01 08:50:00,592 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 08:50:00,592 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 08:50:00,592 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 08:50:00,593 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 08:50:00,593 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 08:50:00,594 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 08:50:00,594 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 08:50:00,594 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 08:50:00,594 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 08:50:00,594 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 08:50:00,595 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 08:50:00,595 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 08:50:00,595 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 08:50:00,595 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 08:50:00,595 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 08:50:00,595 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 08:50:00,595 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 08:50:00,595 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 08:50:00,596 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 08:50:00,596 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 08:50:00,596 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 08:50:00,596 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 08:50:00,596 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 08:50:00,597 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 08:50:00,597 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 08:50:00,597 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 08:50:00,597 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 08:50:00,597 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 08:50:00,597 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 08:50:00,597 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 08:50:00,597 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 08:50:00,598 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 08:50:00,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:50:00,598 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 08:50:00,598 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 08:50:00,598 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 08:50:00,598 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 08:50:00,598 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 08:50:00,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 08:50:00,599 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 08:50:00,599 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 08:50:00,599 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 08:50:00,819 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 08:50:00,839 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 08:50:00,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 08:50:00,843 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 08:50:00,843 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 08:50:00,844 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sum20-2.i [2023-04-01 08:50:01,957 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 08:50:02,166 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 08:50:02,167 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sum20-2.i [2023-04-01 08:50:02,172 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/643d20940/c2b1faf9c9df45d59e607e016b42e0fc/FLAG0f9cadbcc [2023-04-01 08:50:02,187 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/643d20940/c2b1faf9c9df45d59e607e016b42e0fc [2023-04-01 08:50:02,189 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 08:50:02,190 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 08:50:02,193 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 08:50:02,193 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 08:50:02,196 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 08:50:02,197 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:50:02" (1/1) ... [2023-04-01 08:50:02,198 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@604a7599 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:50:02, skipping insertion in model container [2023-04-01 08:50:02,198 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:50:02" (1/1) ... [2023-04-01 08:50:02,204 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 08:50:02,218 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 08:50:02,365 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/sum20-2.i[1277,1290] [2023-04-01 08:50:02,369 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:50:02,376 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 08:50:02,391 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/sum20-2.i[1277,1290] [2023-04-01 08:50:02,392 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:50:02,403 INFO L208 MainTranslator]: Completed translation [2023-04-01 08:50:02,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:50:02 WrapperNode [2023-04-01 08:50:02,404 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 08:50:02,405 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 08:50:02,405 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 08:50:02,405 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 08:50:02,413 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:50:02" (1/1) ... [2023-04-01 08:50:02,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:50:02" (1/1) ... [2023-04-01 08:50:02,419 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:50:02" (1/1) ... [2023-04-01 08:50:02,419 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:50:02" (1/1) ... [2023-04-01 08:50:02,425 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:50:02" (1/1) ... [2023-04-01 08:50:02,428 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:50:02" (1/1) ... [2023-04-01 08:50:02,429 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:50:02" (1/1) ... [2023-04-01 08:50:02,429 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:50:02" (1/1) ... [2023-04-01 08:50:02,431 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 08:50:02,432 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 08:50:02,432 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 08:50:02,432 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 08:50:02,433 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:50:02" (1/1) ... [2023-04-01 08:50:02,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:50:02,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:50:02,466 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) [2023-04-01 08:50:02,469 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 [2023-04-01 08:50:02,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 08:50:02,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 08:50:02,498 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 08:50:02,498 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2023-04-01 08:50:02,498 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 08:50:02,498 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 08:50:02,498 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 08:50:02,502 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 08:50:02,502 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 08:50:02,502 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 08:50:02,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 08:50:02,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 08:50:02,502 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2023-04-01 08:50:02,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 08:50:02,502 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 08:50:02,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 08:50:02,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 08:50:02,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 08:50:02,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 08:50:02,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 08:50:02,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 08:50:02,564 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 08:50:02,566 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 08:50:02,694 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 08:50:02,742 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 08:50:02,742 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 08:50:02,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:50:02 BoogieIcfgContainer [2023-04-01 08:50:02,744 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 08:50:02,746 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 08:50:02,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 08:50:02,765 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 08:50:02,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:50:02" (1/3) ... [2023-04-01 08:50:02,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e1bd22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:50:02, skipping insertion in model container [2023-04-01 08:50:02,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:50:02" (2/3) ... [2023-04-01 08:50:02,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e1bd22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:50:02, skipping insertion in model container [2023-04-01 08:50:02,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:50:02" (3/3) ... [2023-04-01 08:50:02,768 INFO L112 eAbstractionObserver]: Analyzing ICFG sum20-2.i [2023-04-01 08:50:02,789 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 08:50:02,789 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 08:50:02,861 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 08:50:02,867 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;@92d812e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 08:50:02,868 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 08:50:02,872 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 08:50:02,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 08:50:02,908 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:50:02,908 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] [2023-04-01 08:50:02,909 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:50:02,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:50:02,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1236220895, now seen corresponding path program 1 times [2023-04-01 08:50:02,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:50:02,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549859305] [2023-04-01 08:50:02,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:50:02,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:50:03,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:50:03,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 08:50:03,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:50:03,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549859305] [2023-04-01 08:50:03,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549859305] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:50:03,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 08:50:03,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 08:50:03,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65821898] [2023-04-01 08:50:03,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:50:03,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 08:50:03,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:50:03,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 08:50:03,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 08:50:03,281 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 08:50:03,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:50:03,315 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2023-04-01 08:50:03,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 08:50:03,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 24 [2023-04-01 08:50:03,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:50:03,322 INFO L225 Difference]: With dead ends: 41 [2023-04-01 08:50:03,322 INFO L226 Difference]: Without dead ends: 20 [2023-04-01 08:50:03,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 08:50:03,328 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 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 [2023-04-01 08:50:03,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:50:03,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-04-01 08:50:03,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-04-01 08:50:03,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:50:03,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-04-01 08:50:03,366 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2023-04-01 08:50:03,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:50:03,366 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-04-01 08:50:03,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 08:50:03,367 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-04-01 08:50:03,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 08:50:03,369 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:50:03,372 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] [2023-04-01 08:50:03,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 08:50:03,373 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:50:03,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:50:03,373 INFO L85 PathProgramCache]: Analyzing trace with hash -298067163, now seen corresponding path program 1 times [2023-04-01 08:50:03,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:50:03,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136389666] [2023-04-01 08:50:03,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:50:03,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:50:03,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:50:03,526 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 08:50:03,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:50:03,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136389666] [2023-04-01 08:50:03,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136389666] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:50:03,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504351114] [2023-04-01 08:50:03,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:50:03,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:50:03,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:50:03,532 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) [2023-04-01 08:50:03,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 08:50:03,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:50:03,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 08:50:03,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:50:03,635 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 08:50:03,636 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 08:50:03,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504351114] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:50:03,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 08:50:03,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-01 08:50:03,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596431507] [2023-04-01 08:50:03,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:50:03,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 08:50:03,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:50:03,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 08:50:03,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 08:50:03,639 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 08:50:03,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:50:03,655 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2023-04-01 08:50:03,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 08:50:03,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2023-04-01 08:50:03,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:50:03,656 INFO L225 Difference]: With dead ends: 33 [2023-04-01 08:50:03,656 INFO L226 Difference]: Without dead ends: 21 [2023-04-01 08:50:03,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 08:50:03,658 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 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 [2023-04-01 08:50:03,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:50:03,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-01 08:50:03,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-01 08:50:03,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:50:03,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-04-01 08:50:03,663 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2023-04-01 08:50:03,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:50:03,664 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-04-01 08:50:03,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 08:50:03,664 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-04-01 08:50:03,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 08:50:03,665 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:50:03,665 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] [2023-04-01 08:50:03,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 08:50:03,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:50:03,871 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:50:03,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:50:03,872 INFO L85 PathProgramCache]: Analyzing trace with hash 931073009, now seen corresponding path program 1 times [2023-04-01 08:50:03,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:50:03,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119059296] [2023-04-01 08:50:03,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:50:03,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:50:03,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:50:03,993 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 08:50:03,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:50:03,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119059296] [2023-04-01 08:50:03,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119059296] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:50:03,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603373137] [2023-04-01 08:50:03,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:50:03,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:50:03,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:50:03,997 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) [2023-04-01 08:50:04,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 08:50:04,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:50:04,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 08:50:04,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:50:04,114 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 08:50:04,114 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 08:50:04,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603373137] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:50:04,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 08:50:04,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-01 08:50:04,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873084965] [2023-04-01 08:50:04,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:50:04,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 08:50:04,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:50:04,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 08:50:04,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 08:50:04,117 INFO L87 Difference]: Start difference. First operand 21 states and 25 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, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 08:50:04,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:50:04,145 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2023-04-01 08:50:04,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 08:50:04,145 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, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2023-04-01 08:50:04,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:50:04,146 INFO L225 Difference]: With dead ends: 31 [2023-04-01 08:50:04,146 INFO L226 Difference]: Without dead ends: 22 [2023-04-01 08:50:04,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 08:50:04,148 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 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 [2023-04-01 08:50:04,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:50:04,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-01 08:50:04,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-01 08:50:04,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:50:04,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-04-01 08:50:04,153 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2023-04-01 08:50:04,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:50:04,154 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-04-01 08:50:04,154 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, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 08:50:04,155 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-04-01 08:50:04,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 08:50:04,155 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:50:04,156 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] [2023-04-01 08:50:04,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 08:50:04,361 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,SelfDestructingSolverStorable2 [2023-04-01 08:50:04,362 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:50:04,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:50:04,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1733187566, now seen corresponding path program 1 times [2023-04-01 08:50:04,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:50:04,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329192371] [2023-04-01 08:50:04,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:50:04,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:50:04,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:50:04,475 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 08:50:04,476 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:50:04,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329192371] [2023-04-01 08:50:04,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329192371] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:50:04,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319908096] [2023-04-01 08:50:04,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:50:04,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:50:04,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:50:04,478 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) [2023-04-01 08:50:04,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 08:50:04,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:50:04,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 08:50:04,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:50:04,634 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 08:50:04,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:50:04,691 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 08:50:04,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319908096] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:50:04,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1547690385] [2023-04-01 08:50:04,746 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:50:04,746 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:50:04,749 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:50:04,753 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:50:04,753 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:50:04,887 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:50:05,884 INFO L197 IcfgInterpreter]: Interpreting procedure sum with input of size 22 for LOIs [2023-04-01 08:50:05,925 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:50:05,930 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:50:06,919 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '631#(and (= (select |old(#valid)| 1) 1) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (= (select |old(#length)| 2) 10) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= |#NULL.base| 0))' at error location [2023-04-01 08:50:06,919 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:50:06,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:50:06,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 08:50:06,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905062520] [2023-04-01 08:50:06,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:50:06,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 08:50:06,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:50:06,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 08:50:06,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2023-04-01 08:50:06,923 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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) [2023-04-01 08:50:06,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:50:06,963 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2023-04-01 08:50:06,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 08:50:06,969 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 29 [2023-04-01 08:50:06,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:50:06,970 INFO L225 Difference]: With dead ends: 40 [2023-04-01 08:50:06,970 INFO L226 Difference]: Without dead ends: 25 [2023-04-01 08:50:06,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2023-04-01 08:50:06,975 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:50:06,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:50:06,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-01 08:50:06,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-04-01 08:50:06,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:50:06,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-04-01 08:50:06,981 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 29 [2023-04-01 08:50:06,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:50:06,982 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-04-01 08:50:06,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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) [2023-04-01 08:50:06,982 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-04-01 08:50:06,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 08:50:06,983 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:50:06,983 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] [2023-04-01 08:50:06,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 08:50:07,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:50:07,193 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:50:07,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:50:07,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1376604888, now seen corresponding path program 2 times [2023-04-01 08:50:07,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:50:07,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360644073] [2023-04-01 08:50:07,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:50:07,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:50:07,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:50:07,329 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 08:50:07,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:50:07,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360644073] [2023-04-01 08:50:07,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360644073] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:50:07,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299117814] [2023-04-01 08:50:07,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:50:07,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:50:07,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:50:07,332 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) [2023-04-01 08:50:07,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 08:50:07,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 08:50:07,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:50:07,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 08:50:07,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:50:07,410 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 08:50:07,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:50:07,433 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 08:50:07,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299117814] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:50:07,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [522509525] [2023-04-01 08:50:07,436 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:50:07,436 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:50:07,436 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:50:07,437 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:50:07,437 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:50:07,463 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:50:07,958 INFO L197 IcfgInterpreter]: Interpreting procedure sum with input of size 22 for LOIs [2023-04-01 08:50:08,004 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:50:08,007 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:50:08,711 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '947#(and (= (select |old(#valid)| 1) 1) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (= (select |old(#length)| 2) 10) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= |#NULL.base| 0))' at error location [2023-04-01 08:50:08,711 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:50:08,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:50:08,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 08:50:08,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008788832] [2023-04-01 08:50:08,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:50:08,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 08:50:08,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:50:08,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 08:50:08,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2023-04-01 08:50:08,714 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 08:50:08,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:50:08,739 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2023-04-01 08:50:08,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 08:50:08,739 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 32 [2023-04-01 08:50:08,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:50:08,740 INFO L225 Difference]: With dead ends: 42 [2023-04-01 08:50:08,740 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 08:50:08,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2023-04-01 08:50:08,741 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:50:08,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:50:08,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 08:50:08,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-04-01 08:50:08,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:50:08,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-04-01 08:50:08,746 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 32 [2023-04-01 08:50:08,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:50:08,746 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-04-01 08:50:08,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 08:50:08,746 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-04-01 08:50:08,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 08:50:08,747 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:50:08,747 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] [2023-04-01 08:50:08,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 08:50:08,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:50:08,948 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:50:08,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:50:08,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1977204450, now seen corresponding path program 3 times [2023-04-01 08:50:08,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:50:08,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029898848] [2023-04-01 08:50:08,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:50:08,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:50:08,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:50:09,053 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-04-01 08:50:09,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:50:09,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029898848] [2023-04-01 08:50:09,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029898848] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:50:09,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474134891] [2023-04-01 08:50:09,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 08:50:09,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:50:09,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:50:09,057 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) [2023-04-01 08:50:09,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 08:50:09,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 08:50:09,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:50:09,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 08:50:09,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:50:09,179 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-04-01 08:50:09,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:50:09,238 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-04-01 08:50:09,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474134891] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:50:09,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [798497416] [2023-04-01 08:50:09,242 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:50:09,242 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:50:09,243 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:50:09,243 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:50:09,243 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:50:09,269 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:50:09,761 INFO L197 IcfgInterpreter]: Interpreting procedure sum with input of size 22 for LOIs [2023-04-01 08:50:09,800 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:50:09,804 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:50:10,540 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1334#(and (= (select |old(#valid)| 1) 1) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (= (select |old(#length)| 2) 10) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= |#NULL.base| 0))' at error location [2023-04-01 08:50:10,540 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:50:10,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:50:10,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-04-01 08:50:10,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916344968] [2023-04-01 08:50:10,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:50:10,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 08:50:10,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:50:10,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 08:50:10,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2023-04-01 08:50:10,542 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-01 08:50:10,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:50:10,584 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2023-04-01 08:50:10,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 08:50:10,585 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 41 [2023-04-01 08:50:10,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:50:10,585 INFO L225 Difference]: With dead ends: 53 [2023-04-01 08:50:10,585 INFO L226 Difference]: Without dead ends: 35 [2023-04-01 08:50:10,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2023-04-01 08:50:10,587 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:50:10,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:50:10,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-04-01 08:50:10,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-04-01 08:50:10,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:50:10,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2023-04-01 08:50:10,592 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 41 [2023-04-01 08:50:10,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:50:10,592 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2023-04-01 08:50:10,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-01 08:50:10,592 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2023-04-01 08:50:10,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 08:50:10,593 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:50:10,593 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:50:10,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-01 08:50:10,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:50:10,800 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:50:10,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:50:10,800 INFO L85 PathProgramCache]: Analyzing trace with hash 2057333119, now seen corresponding path program 4 times [2023-04-01 08:50:10,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:50:10,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270688575] [2023-04-01 08:50:10,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:50:10,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:50:10,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:50:11,079 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-04-01 08:50:11,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:50:11,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270688575] [2023-04-01 08:50:11,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270688575] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:50:11,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057228414] [2023-04-01 08:50:11,080 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 08:50:11,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:50:11,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:50:11,081 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) [2023-04-01 08:50:11,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 08:50:11,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:50:11,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 08:50:11,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:50:11,200 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-04-01 08:50:11,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:50:11,353 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-04-01 08:50:11,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057228414] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:50:11,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2012415301] [2023-04-01 08:50:11,355 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:50:11,355 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:50:11,356 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:50:11,356 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:50:11,356 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:50:11,392 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:50:11,869 INFO L197 IcfgInterpreter]: Interpreting procedure sum with input of size 22 for LOIs [2023-04-01 08:50:11,897 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:50:11,899 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:50:12,611 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1808#(and (= (select |old(#valid)| 1) 1) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (= (select |old(#length)| 2) 10) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= |#NULL.base| 0))' at error location [2023-04-01 08:50:12,612 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:50:12,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:50:12,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2023-04-01 08:50:12,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298661467] [2023-04-01 08:50:12,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:50:12,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-01 08:50:12,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:50:12,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-01 08:50:12,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=970, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 08:50:12,614 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 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) [2023-04-01 08:50:12,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:50:12,678 INFO L93 Difference]: Finished difference Result 64 states and 81 transitions. [2023-04-01 08:50:12,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 08:50:12,678 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 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 48 [2023-04-01 08:50:12,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:50:12,679 INFO L225 Difference]: With dead ends: 64 [2023-04-01 08:50:12,679 INFO L226 Difference]: Without dead ends: 45 [2023-04-01 08:50:12,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=290, Invalid=970, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 08:50:12,681 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:50:12,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:50:12,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-04-01 08:50:12,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-04-01 08:50:12,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:50:12,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2023-04-01 08:50:12,687 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 48 [2023-04-01 08:50:12,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:50:12,687 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2023-04-01 08:50:12,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 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) [2023-04-01 08:50:12,687 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2023-04-01 08:50:12,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 08:50:12,688 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:50:12,689 INFO L195 NwaCegarLoop]: trace histogram [20, 12, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:50:12,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 08:50:12,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:50:12,892 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:50:12,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:50:12,893 INFO L85 PathProgramCache]: Analyzing trace with hash 389862719, now seen corresponding path program 5 times [2023-04-01 08:50:12,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:50:12,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741395504] [2023-04-01 08:50:12,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:50:12,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:50:12,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:50:13,071 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2023-04-01 08:50:13,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:50:13,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741395504] [2023-04-01 08:50:13,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741395504] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:50:13,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47391095] [2023-04-01 08:50:13,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:50:13,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:50:13,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:50:13,073 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) [2023-04-01 08:50:13,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 08:50:13,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 08:50:13,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:50:13,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 08:50:13,181 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:50:13,194 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2023-04-01 08:50:13,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:50:13,247 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2023-04-01 08:50:13,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47391095] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:50:13,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1009153495] [2023-04-01 08:50:13,248 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:50:13,249 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:50:13,249 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:50:13,249 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:50:13,249 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:50:13,272 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:50:13,717 INFO L197 IcfgInterpreter]: Interpreting procedure sum with input of size 22 for LOIs [2023-04-01 08:50:13,751 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:50:13,755 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:50:14,453 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2374#(and (= (select |old(#valid)| 1) 1) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (= (select |old(#length)| 2) 10) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= |#NULL.base| 0))' at error location [2023-04-01 08:50:14,454 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:50:14,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:50:14,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-04-01 08:50:14,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344490783] [2023-04-01 08:50:14,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:50:14,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 08:50:14,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:50:14,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 08:50:14,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2023-04-01 08:50:14,456 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 08:50:14,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:50:14,488 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2023-04-01 08:50:14,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 08:50:14,489 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 58 [2023-04-01 08:50:14,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:50:14,490 INFO L225 Difference]: With dead ends: 69 [2023-04-01 08:50:14,490 INFO L226 Difference]: Without dead ends: 51 [2023-04-01 08:50:14,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2023-04-01 08:50:14,491 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 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 [2023-04-01 08:50:14,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:50:14,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-04-01 08:50:14,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-04-01 08:50:14,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:50:14,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2023-04-01 08:50:14,497 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 58 [2023-04-01 08:50:14,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:50:14,498 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2023-04-01 08:50:14,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 08:50:14,498 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2023-04-01 08:50:14,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-01 08:50:14,499 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:50:14,499 INFO L195 NwaCegarLoop]: trace histogram [30, 20, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:50:14,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 08:50:14,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:50:14,705 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:50:14,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:50:14,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1630608321, now seen corresponding path program 6 times [2023-04-01 08:50:14,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:50:14,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983930082] [2023-04-01 08:50:14,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:50:14,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:50:14,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:50:15,012 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2023-04-01 08:50:15,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:50:15,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983930082] [2023-04-01 08:50:15,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983930082] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:50:15,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377444475] [2023-04-01 08:50:15,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 08:50:15,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:50:15,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:50:15,014 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) [2023-04-01 08:50:15,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 08:50:15,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 08:50:15,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:50:15,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 08:50:15,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:50:15,189 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 244 proven. 55 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2023-04-01 08:50:15,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:50:15,336 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2023-04-01 08:50:15,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377444475] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:50:15,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1664620503] [2023-04-01 08:50:15,338 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:50:15,338 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:50:15,338 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:50:15,339 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:50:15,339 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:50:15,359 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:50:15,748 INFO L197 IcfgInterpreter]: Interpreting procedure sum with input of size 22 for LOIs [2023-04-01 08:50:15,772 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:50:15,775 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:50:16,516 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3080#(and (= (select |old(#valid)| 1) 1) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (= (select |old(#length)| 2) 10) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= |#NULL.base| 0))' at error location [2023-04-01 08:50:16,516 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:50:16,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:50:16,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2023-04-01 08:50:16,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009632245] [2023-04-01 08:50:16,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:50:16,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-01 08:50:16,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:50:16,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-01 08:50:16,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=970, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 08:50:16,518 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 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) [2023-04-01 08:50:16,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:50:16,563 INFO L93 Difference]: Finished difference Result 85 states and 104 transitions. [2023-04-01 08:50:16,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 08:50:16,564 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 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 76 [2023-04-01 08:50:16,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:50:16,566 INFO L225 Difference]: With dead ends: 85 [2023-04-01 08:50:16,566 INFO L226 Difference]: Without dead ends: 61 [2023-04-01 08:50:16,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 204 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=290, Invalid=970, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 08:50:16,569 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:50:16,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:50:16,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-04-01 08:50:16,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-04-01 08:50:16,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:50:16,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2023-04-01 08:50:16,579 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 76 [2023-04-01 08:50:16,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:50:16,579 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2023-04-01 08:50:16,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 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) [2023-04-01 08:50:16,579 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2023-04-01 08:50:16,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-04-01 08:50:16,580 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:50:16,580 INFO L195 NwaCegarLoop]: trace histogram [60, 20, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:50:16,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 08:50:16,781 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,SelfDestructingSolverStorable8 [2023-04-01 08:50:16,781 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:50:16,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:50:16,782 INFO L85 PathProgramCache]: Analyzing trace with hash -2104361665, now seen corresponding path program 7 times [2023-04-01 08:50:16,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:50:16,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130388589] [2023-04-01 08:50:16,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:50:16,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:50:16,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:50:16,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2172 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2169 trivial. 0 not checked. [2023-04-01 08:50:16,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:50:16,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130388589] [2023-04-01 08:50:16,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130388589] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:50:16,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655805078] [2023-04-01 08:50:16,975 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 08:50:16,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:50:16,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:50:16,977 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) [2023-04-01 08:50:16,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 08:50:17,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:50:17,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 08:50:17,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:50:17,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2172 backedges. 886 proven. 3 refuted. 0 times theorem prover too weak. 1283 trivial. 0 not checked. [2023-04-01 08:50:17,167 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:50:17,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2172 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2169 trivial. 0 not checked. [2023-04-01 08:50:17,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655805078] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:50:17,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1127402181] [2023-04-01 08:50:17,199 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:50:17,199 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:50:17,200 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:50:17,200 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:50:17,200 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:50:17,220 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:50:17,631 INFO L197 IcfgInterpreter]: Interpreting procedure sum with input of size 22 for LOIs [2023-04-01 08:50:17,656 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:50:17,658 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:50:18,271 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4004#(and (= (select |old(#valid)| 1) 1) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (= (select |old(#length)| 2) 10) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= |#NULL.base| 0))' at error location [2023-04-01 08:50:18,271 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:50:18,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:50:18,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-04-01 08:50:18,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048628721] [2023-04-01 08:50:18,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:50:18,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 08:50:18,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:50:18,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 08:50:18,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2023-04-01 08:50:18,273 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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) [2023-04-01 08:50:18,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:50:18,307 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2023-04-01 08:50:18,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 08:50:18,307 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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 106 [2023-04-01 08:50:18,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:50:18,308 INFO L225 Difference]: With dead ends: 93 [2023-04-01 08:50:18,308 INFO L226 Difference]: Without dead ends: 65 [2023-04-01 08:50:18,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2023-04-01 08:50:18,309 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:50:18,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:50:18,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-04-01 08:50:18,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-04-01 08:50:18,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:50:18,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2023-04-01 08:50:18,315 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 106 [2023-04-01 08:50:18,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:50:18,316 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2023-04-01 08:50:18,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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) [2023-04-01 08:50:18,316 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2023-04-01 08:50:18,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-04-01 08:50:18,317 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:50:18,318 INFO L195 NwaCegarLoop]: trace histogram [60, 20, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:50:18,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 08:50:18,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 08:50:18,528 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:50:18,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:50:18,528 INFO L85 PathProgramCache]: Analyzing trace with hash 2112914687, now seen corresponding path program 8 times [2023-04-01 08:50:18,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:50:18,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427741420] [2023-04-01 08:50:18,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:50:18,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:50:18,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:50:18,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2190 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2169 trivial. 0 not checked. [2023-04-01 08:50:18,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:50:18,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427741420] [2023-04-01 08:50:18,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427741420] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:50:18,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284364935] [2023-04-01 08:50:18,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:50:18,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:50:18,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:50:18,828 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) [2023-04-01 08:50:18,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 08:50:19,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-01 08:50:19,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:50:19,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 08:50:19,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:50:19,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2190 backedges. 886 proven. 21 refuted. 0 times theorem prover too weak. 1283 trivial. 0 not checked. [2023-04-01 08:50:19,047 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:50:19,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2190 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2169 trivial. 0 not checked. [2023-04-01 08:50:19,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284364935] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:50:19,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [987687697] [2023-04-01 08:50:19,138 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:50:19,138 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:50:19,139 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:50:19,139 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:50:19,139 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:50:19,164 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:50:19,643 INFO L197 IcfgInterpreter]: Interpreting procedure sum with input of size 22 for LOIs [2023-04-01 08:50:19,687 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:50:19,690 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:50:20,297 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4986#(and (= (select |old(#valid)| 1) 1) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (= (select |old(#length)| 2) 10) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= |#NULL.base| 0))' at error location [2023-04-01 08:50:20,297 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:50:20,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:50:20,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-04-01 08:50:20,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965683637] [2023-04-01 08:50:20,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:50:20,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 08:50:20,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:50:20,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 08:50:20,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2023-04-01 08:50:20,299 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 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) [2023-04-01 08:50:20,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:50:20,352 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2023-04-01 08:50:20,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 08:50:20,352 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 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 110 [2023-04-01 08:50:20,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:50:20,355 INFO L225 Difference]: With dead ends: 101 [2023-04-01 08:50:20,356 INFO L226 Difference]: Without dead ends: 73 [2023-04-01 08:50:20,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2023-04-01 08:50:20,357 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:50:20,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 151 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:50:20,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-04-01 08:50:20,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2023-04-01 08:50:20,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 65 states have internal predecessors, (68), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:50:20,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2023-04-01 08:50:20,378 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 110 [2023-04-01 08:50:20,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:50:20,379 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2023-04-01 08:50:20,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 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) [2023-04-01 08:50:20,379 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2023-04-01 08:50:20,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-04-01 08:50:20,380 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:50:20,381 INFO L195 NwaCegarLoop]: trace histogram [60, 20, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:50:20,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 08:50:20,581 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,SelfDestructingSolverStorable10 [2023-04-01 08:50:20,581 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:50:20,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:50:20,582 INFO L85 PathProgramCache]: Analyzing trace with hash 444593279, now seen corresponding path program 9 times [2023-04-01 08:50:20,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:50:20,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714582818] [2023-04-01 08:50:20,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:50:20,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:50:20,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:50:21,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2274 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 2169 trivial. 0 not checked. [2023-04-01 08:50:21,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:50:21,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714582818] [2023-04-01 08:50:21,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714582818] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:50:21,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71799639] [2023-04-01 08:50:21,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 08:50:21,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:50:21,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:50:21,126 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) [2023-04-01 08:50:21,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 08:50:21,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 08:50:21,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:50:21,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 08:50:21,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:50:21,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2274 backedges. 886 proven. 105 refuted. 0 times theorem prover too weak. 1283 trivial. 0 not checked. [2023-04-01 08:50:21,376 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:50:21,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2274 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 2169 trivial. 0 not checked. [2023-04-01 08:50:21,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71799639] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:50:21,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [68770207] [2023-04-01 08:50:21,555 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 08:50:21,555 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:50:21,555 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:50:21,555 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:50:21,556 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:50:21,577 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 43 for LOIs [2023-04-01 08:50:21,943 INFO L197 IcfgInterpreter]: Interpreting procedure sum with input of size 22 for LOIs [2023-04-01 08:50:21,993 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 08:50:21,995 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:50:22,630 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6053#(and (= (select |old(#valid)| 1) 1) (<= main_~ret5~0 2147483647) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (or (not (= main_~ret~1 main_~ret5~0)) (not (= main_~ret~1 main_~ret2~0))) (not (= |main_~#x~0.base| 0)) (not (= |main_~#x~0.base| |#StackHeapBarrier|)) (<= 0 (+ main_~ret5~0 2147483648)) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= |main_~#x~0.offset| 0) (= |#NULL.offset| 0) (= (select |old(#length)| 2) 10) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= |#NULL.base| 0))' at error location [2023-04-01 08:50:22,630 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:50:22,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:50:22,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 22 [2023-04-01 08:50:22,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349149988] [2023-04-01 08:50:22,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:50:22,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-01 08:50:22,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:50:22,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-01 08:50:22,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=922, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 08:50:22,632 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 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) [2023-04-01 08:50:22,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:50:22,672 INFO L93 Difference]: Finished difference Result 106 states and 115 transitions. [2023-04-01 08:50:22,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 08:50:22,672 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 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 118 [2023-04-01 08:50:22,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:50:22,673 INFO L225 Difference]: With dead ends: 106 [2023-04-01 08:50:22,673 INFO L226 Difference]: Without dead ends: 78 [2023-04-01 08:50:22,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 326 SyntacticMatches, 11 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=268, Invalid=922, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 08:50:22,674 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:50:22,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:50:22,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-04-01 08:50:22,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2023-04-01 08:50:22,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 states have internal predecessors, (73), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:50:22,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2023-04-01 08:50:22,679 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 118 [2023-04-01 08:50:22,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:50:22,680 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2023-04-01 08:50:22,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 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) [2023-04-01 08:50:22,680 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2023-04-01 08:50:22,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-04-01 08:50:22,681 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:50:22,681 INFO L195 NwaCegarLoop]: trace histogram [60, 20, 19, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:50:22,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 08:50:22,882 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,SelfDestructingSolverStorable11 [2023-04-01 08:50:22,882 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:50:22,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:50:22,882 INFO L85 PathProgramCache]: Analyzing trace with hash 100923966, now seen corresponding path program 10 times [2023-04-01 08:50:22,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:50:22,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756891425] [2023-04-01 08:50:22,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:50:22,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:50:26,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat