/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/array-tiling/rewrev.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 20:46:54,101 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 20:46:54,103 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 20:46:54,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 20:46:54,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 20:46:54,137 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 20:46:54,140 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 20:46:54,142 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 20:46:54,143 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 20:46:54,147 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 20:46:54,148 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 20:46:54,150 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 20:46:54,150 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 20:46:54,152 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 20:46:54,155 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 20:46:54,156 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 20:46:54,157 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 20:46:54,158 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 20:46:54,159 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 20:46:54,163 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 20:46:54,165 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 20:46:54,165 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 20:46:54,166 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 20:46:54,167 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 20:46:54,173 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 20:46:54,173 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 20:46:54,174 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 20:46:54,175 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 20:46:54,175 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 20:46:54,176 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 20:46:54,176 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 20:46:54,176 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 20:46:54,178 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 20:46:54,178 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 20:46:54,178 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 20:46:54,179 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 20:46:54,179 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 20:46:54,179 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 20:46:54,179 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 20:46:54,180 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 20:46:54,180 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 20:46:54,181 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 20:46:54,204 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 20:46:54,204 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 20:46:54,204 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 20:46:54,205 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 20:46:54,205 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 20:46:54,205 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 20:46:54,206 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 20:46:54,206 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 20:46:54,206 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 20:46:54,206 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 20:46:54,207 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 20:46:54,207 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 20:46:54,207 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 20:46:54,207 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 20:46:54,207 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 20:46:54,207 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 20:46:54,207 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 20:46:54,207 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 20:46:54,208 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 20:46:54,208 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 20:46:54,208 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 20:46:54,208 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 20:46:54,208 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 20:46:54,208 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 20:46:54,209 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 20:46:54,209 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 20:46:54,209 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 20:46:54,209 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 20:46:54,209 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 20:46:54,209 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 20:46:54,209 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 20:46:54,209 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 20:46:54,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:46:54,210 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 20:46:54,210 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 20:46:54,210 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 20:46:54,210 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 20:46:54,210 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 20:46:54,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 20:46:54,210 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 20:46:54,210 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 20:46:54,211 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 20:46:54,415 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 20:46:54,434 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 20:46:54,436 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 20:46:54,437 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 20:46:54,437 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 20:46:54,438 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/rewrev.c [2023-03-31 20:46:55,465 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 20:46:55,601 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 20:46:55,601 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/rewrev.c [2023-03-31 20:46:55,605 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/791634e45/a032d85abfcc48babdb35baefccd5c4a/FLAG6fdc77a65 [2023-03-31 20:46:55,614 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/791634e45/a032d85abfcc48babdb35baefccd5c4a [2023-03-31 20:46:55,616 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 20:46:55,617 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 20:46:55,618 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 20:46:55,618 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 20:46:55,621 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 20:46:55,621 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:46:55" (1/1) ... [2023-03-31 20:46:55,622 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@395c1157 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:46:55, skipping insertion in model container [2023-03-31 20:46:55,622 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:46:55" (1/1) ... [2023-03-31 20:46:55,627 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 20:46:55,636 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 20:46:55,725 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/rewrev.c[397,410] [2023-03-31 20:46:55,736 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:46:55,743 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 20:46:55,751 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/array-tiling/rewrev.c[397,410] [2023-03-31 20:46:55,754 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:46:55,764 INFO L208 MainTranslator]: Completed translation [2023-03-31 20:46:55,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:46:55 WrapperNode [2023-03-31 20:46:55,765 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 20:46:55,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 20:46:55,766 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 20:46:55,766 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 20:46:55,773 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:46:55" (1/1) ... [2023-03-31 20:46:55,773 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:46:55" (1/1) ... [2023-03-31 20:46:55,778 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:46:55" (1/1) ... [2023-03-31 20:46:55,778 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:46:55" (1/1) ... [2023-03-31 20:46:55,782 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:46:55" (1/1) ... [2023-03-31 20:46:55,785 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:46:55" (1/1) ... [2023-03-31 20:46:55,785 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:46:55" (1/1) ... [2023-03-31 20:46:55,786 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:46:55" (1/1) ... [2023-03-31 20:46:55,787 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 20:46:55,788 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 20:46:55,788 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 20:46:55,788 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 20:46:55,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:46:55" (1/1) ... [2023-03-31 20:46:55,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:46:55,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:46:55,812 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 20:46:55,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 20:46:55,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 20:46:55,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 20:46:55,838 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 20:46:55,838 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 20:46:55,838 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 20:46:55,838 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 20:46:55,838 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 20:46:55,838 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 20:46:55,838 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 20:46:55,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 20:46:55,838 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 20:46:55,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 20:46:55,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 20:46:55,839 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-31 20:46:55,839 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 20:46:55,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-31 20:46:55,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 20:46:55,839 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 20:46:55,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 20:46:55,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 20:46:55,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 20:46:55,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 20:46:55,888 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 20:46:55,890 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 20:46:56,002 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 20:46:56,028 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 20:46:56,029 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-03-31 20:46:56,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:46:56 BoogieIcfgContainer [2023-03-31 20:46:56,031 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 20:46:56,032 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 20:46:56,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 20:46:56,041 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 20:46:56,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 08:46:55" (1/3) ... [2023-03-31 20:46:56,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53c31609 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:46:56, skipping insertion in model container [2023-03-31 20:46:56,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:46:55" (2/3) ... [2023-03-31 20:46:56,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53c31609 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:46:56, skipping insertion in model container [2023-03-31 20:46:56,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:46:56" (3/3) ... [2023-03-31 20:46:56,043 INFO L112 eAbstractionObserver]: Analyzing ICFG rewrev.c [2023-03-31 20:46:56,075 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 20:46:56,076 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 20:46:56,124 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 20:46:56,137 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;@6724346f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 20:46:56,137 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 20:46:56,140 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 20:46:56,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-03-31 20:46:56,146 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:46:56,147 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:46:56,147 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:46:56,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:46:56,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1538200716, now seen corresponding path program 1 times [2023-03-31 20:46:56,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:46:56,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941945735] [2023-03-31 20:46:56,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:46:56,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:46:56,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:46:56,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:46:56,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:46:56,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941945735] [2023-03-31 20:46:56,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941945735] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:46:56,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:46:56,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 20:46:56,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928380202] [2023-03-31 20:46:56,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:46:56,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 20:46:56,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:46:56,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 20:46:56,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 20:46:56,334 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:46:56,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:46:56,391 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2023-03-31 20:46:56,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 20:46:56,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-03-31 20:46:56,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:46:56,397 INFO L225 Difference]: With dead ends: 36 [2023-03-31 20:46:56,397 INFO L226 Difference]: Without dead ends: 17 [2023-03-31 20:46:56,401 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 [2023-03-31 20:46:56,404 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:46:56,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 30 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:46:56,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-03-31 20:46:56,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-03-31 20:46:56,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 20:46:56,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2023-03-31 20:46:56,435 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2023-03-31 20:46:56,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:46:56,436 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2023-03-31 20:46:56,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:46:56,437 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2023-03-31 20:46:56,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-03-31 20:46:56,438 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:46:56,438 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:46:56,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 20:46:56,439 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:46:56,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:46:56,442 INFO L85 PathProgramCache]: Analyzing trace with hash -866847342, now seen corresponding path program 1 times [2023-03-31 20:46:56,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:46:56,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137455388] [2023-03-31 20:46:56,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:46:56,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:46:56,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:46:56,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:46:56,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:46:56,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137455388] [2023-03-31 20:46:56,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137455388] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:46:56,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74462493] [2023-03-31 20:46:56,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:46:56,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:46:56,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:46:56,594 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:46:56,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 20:46:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:46:56,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 20:46:56,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:46:56,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:46:56,702 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:46:56,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:46:56,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74462493] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:46:56,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1435232677] [2023-03-31 20:46:56,752 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-03-31 20:46:56,752 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:46:56,755 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:46:56,758 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:46:56,759 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:46:56,870 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-03-31 20:46:56,997 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-03-31 20:46:57,024 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-03-31 20:46:57,032 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:46:57,377 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '180#(and (= ~MAX~0 100000) (<= 1 ~SIZE~0) (exists ((v_main_~a~0.base_BEFORE_CALL_1 Int)) (< (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_1) 0) 2)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 100000) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:46:57,377 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:46:57,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:46:57,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-03-31 20:46:57,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885024548] [2023-03-31 20:46:57,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:46:57,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 20:46:57,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:46:57,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 20:46:57,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-03-31 20:46:57,382 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:46:57,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:46:57,408 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2023-03-31 20:46:57,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 20:46:57,409 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-03-31 20:46:57,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:46:57,410 INFO L225 Difference]: With dead ends: 27 [2023-03-31 20:46:57,410 INFO L226 Difference]: Without dead ends: 18 [2023-03-31 20:46:57,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-03-31 20:46:57,414 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:46:57,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 32 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:46:57,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-03-31 20:46:57,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-03-31 20:46:57,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 20:46:57,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2023-03-31 20:46:57,422 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2023-03-31 20:46:57,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:46:57,423 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2023-03-31 20:46:57,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:46:57,423 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2023-03-31 20:46:57,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-03-31 20:46:57,425 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:46:57,425 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:46:57,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 20:46:57,629 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 [2023-03-31 20:46:57,629 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:46:57,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:46:57,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1529729228, now seen corresponding path program 2 times [2023-03-31 20:46:57,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:46:57,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309082315] [2023-03-31 20:46:57,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:46:57,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:46:57,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:46:58,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:46:58,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:46:58,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309082315] [2023-03-31 20:46:58,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309082315] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:46:58,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931725262] [2023-03-31 20:46:58,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:46:58,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:46:58,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:46:58,019 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:46:58,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 20:46:58,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-03-31 20:46:58,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:46:58,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 19 conjunts are in the unsatisfiable core [2023-03-31 20:46:58,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:46:58,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-03-31 20:46:58,226 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-03-31 20:46:58,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 10 [2023-03-31 20:46:58,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:46:58,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:46:58,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-03-31 20:46:58,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-03-31 20:46:58,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:46:58,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931725262] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:46:58,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1897589989] [2023-03-31 20:46:58,425 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-03-31 20:46:58,425 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:46:58,425 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:46:58,425 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:46:58,426 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:46:58,457 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-03-31 20:46:58,522 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-03-31 20:46:58,533 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-03-31 20:46:58,541 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:46:58,903 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '361#(and (exists ((v_main_~a~0.base_BEFORE_CALL_2 Int)) (< (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_2) 0) 2)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 100000) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:46:58,903 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:46:58,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:46:58,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-03-31 20:46:58,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425813837] [2023-03-31 20:46:58,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:46:58,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-03-31 20:46:58,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:46:58,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-03-31 20:46:58,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2023-03-31 20:46:58,905 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 21 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:46:59,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:46:59,717 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2023-03-31 20:46:59,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-31 20:46:59,717 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-03-31 20:46:59,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:46:59,718 INFO L225 Difference]: With dead ends: 27 [2023-03-31 20:46:59,718 INFO L226 Difference]: Without dead ends: 25 [2023-03-31 20:46:59,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=205, Invalid=1277, Unknown=0, NotChecked=0, Total=1482 [2023-03-31 20:46:59,724 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 30 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-31 20:46:59,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 67 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 74 Invalid, 1 Unknown, 0 Unchecked, 0.6s Time] [2023-03-31 20:46:59,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-03-31 20:46:59,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2023-03-31 20:46:59,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 20:46:59,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2023-03-31 20:46:59,728 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 14 [2023-03-31 20:46:59,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:46:59,729 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2023-03-31 20:46:59,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:46:59,729 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2023-03-31 20:46:59,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 20:46:59,729 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:46:59,729 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:46:59,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 20:46:59,930 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 [2023-03-31 20:46:59,930 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:46:59,930 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:46:59,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1923393446, now seen corresponding path program 1 times [2023-03-31 20:46:59,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:46:59,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798656432] [2023-03-31 20:46:59,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:46:59,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:46:59,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:47:00,132 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:47:00,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:47:00,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798656432] [2023-03-31 20:47:00,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798656432] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:47:00,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237674065] [2023-03-31 20:47:00,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:47:00,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:47:00,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:47:00,134 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:47:00,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 20:47:00,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:47:00,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 26 conjunts are in the unsatisfiable core [2023-03-31 20:47:00,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:47:00,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-03-31 20:47:00,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 16 [2023-03-31 20:47:00,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 50 [2023-03-31 20:47:00,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 26 [2023-03-31 20:47:00,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2023-03-31 20:47:00,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-03-31 20:47:00,482 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 20:47:00,485 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 20:47:00,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2023-03-31 20:47:00,549 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:47:00,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:47:00,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-03-31 20:47:00,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2023-03-31 20:47:00,706 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:47:00,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237674065] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:47:00,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1189634125] [2023-03-31 20:47:00,708 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-03-31 20:47:00,708 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:47:00,708 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:47:00,708 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:47:00,708 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:47:00,739 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-03-31 20:47:00,913 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 19 for LOIs [2023-03-31 20:47:00,937 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-03-31 20:47:00,941 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:47:01,435 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '611#(and (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 100000) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:47:01,436 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:47:01,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:47:01,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 25 [2023-03-31 20:47:01,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710135403] [2023-03-31 20:47:01,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:47:01,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-03-31 20:47:01,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:47:01,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-03-31 20:47:01,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1202, Unknown=0, NotChecked=0, Total=1332 [2023-03-31 20:47:01,438 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 25 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 7 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:47:03,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-03-31 20:47:04,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-31 20:47:06,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-31 20:47:06,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:47:06,518 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2023-03-31 20:47:06,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-03-31 20:47:06,518 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 7 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 21 [2023-03-31 20:47:06,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:47:06,519 INFO L225 Difference]: With dead ends: 34 [2023-03-31 20:47:06,519 INFO L226 Difference]: Without dead ends: 32 [2023-03-31 20:47:06,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=264, Invalid=1992, Unknown=0, NotChecked=0, Total=2256 [2023-03-31 20:47:06,522 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 51 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 42 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-03-31 20:47:06,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 102 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 190 Invalid, 3 Unknown, 0 Unchecked, 4.7s Time] [2023-03-31 20:47:06,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-03-31 20:47:06,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2023-03-31 20:47:06,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:47:06,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2023-03-31 20:47:06,528 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 21 [2023-03-31 20:47:06,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:47:06,528 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2023-03-31 20:47:06,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 7 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:47:06,528 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2023-03-31 20:47:06,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-03-31 20:47:06,530 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:47:06,530 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:47:06,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 20:47:06,734 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 [2023-03-31 20:47:06,735 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:47:06,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:47:06,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1545524492, now seen corresponding path program 2 times [2023-03-31 20:47:06,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:47:06,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975341271] [2023-03-31 20:47:06,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:47:06,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:47:06,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:47:06,832 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 20:47:06,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:47:06,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975341271] [2023-03-31 20:47:06,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975341271] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:47:06,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081565559] [2023-03-31 20:47:06,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:47:06,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:47:06,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:47:06,838 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:47:06,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 20:47:06,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 20:47:06,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:47:06,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-31 20:47:06,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:47:06,943 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 20:47:06,943 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:47:06,987 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 20:47:06,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081565559] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:47:06,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1577132975] [2023-03-31 20:47:06,990 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-03-31 20:47:06,990 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:47:06,990 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:47:06,990 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:47:06,990 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:47:07,020 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-03-31 20:47:07,133 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 19 for LOIs [2023-03-31 20:47:07,139 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-03-31 20:47:07,142 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:47:07,466 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '923#(and (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 100000) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:47:07,467 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:47:07,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:47:07,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2023-03-31 20:47:07,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888723683] [2023-03-31 20:47:07,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:47:07,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-03-31 20:47:07,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:47:07,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-03-31 20:47:07,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2023-03-31 20:47:07,468 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 20:47:07,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:47:07,525 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2023-03-31 20:47:07,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-31 20:47:07,527 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 28 [2023-03-31 20:47:07,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:47:07,529 INFO L225 Difference]: With dead ends: 56 [2023-03-31 20:47:07,529 INFO L226 Difference]: Without dead ends: 32 [2023-03-31 20:47:07,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2023-03-31 20:47:07,531 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:47:07,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 39 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:47:07,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-03-31 20:47:07,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-03-31 20:47:07,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 23 states have internal predecessors, (24), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:47:07,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2023-03-31 20:47:07,545 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 28 [2023-03-31 20:47:07,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:47:07,545 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2023-03-31 20:47:07,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 20:47:07,545 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2023-03-31 20:47:07,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-03-31 20:47:07,546 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:47:07,546 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:47:07,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 20:47:07,755 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 [2023-03-31 20:47:07,756 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:47:07,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:47:07,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1517893906, now seen corresponding path program 3 times [2023-03-31 20:47:07,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:47:07,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455311476] [2023-03-31 20:47:07,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:47:07,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:47:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:47:08,142 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 20:47:08,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:47:08,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455311476] [2023-03-31 20:47:08,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455311476] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:47:08,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125850725] [2023-03-31 20:47:08,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 20:47:08,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:47:08,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:47:08,144 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:47:08,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 20:47:08,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 20:47:08,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:47:08,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 37 conjunts are in the unsatisfiable core [2023-03-31 20:47:08,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:47:08,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-03-31 20:47:08,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 91 [2023-03-31 20:47:08,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 12 [2023-03-31 20:47:08,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2023-03-31 20:47:08,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2023-03-31 20:47:08,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 17 [2023-03-31 20:47:08,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 62 [2023-03-31 20:47:08,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 28 [2023-03-31 20:47:08,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-03-31 20:47:08,338 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 20:47:08,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 16 [2023-03-31 20:47:10,438 WARN L861 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0.base_BEFORE_CALL_9 Int) (v_main_~i~0_86 Int) (v_main_~a~0.offset_BEFORE_CALL_19 Int)) (let ((.cse2 (+ v_main_~i~0_86 1))) (and (let ((.cse0 (select |c_#memory_int| v_main_~a~0.base_BEFORE_CALL_9)) (.cse1 (* v_main_~i~0_86 4))) (<= (select .cse0 (+ v_main_~a~0.offset_BEFORE_CALL_19 .cse1 4)) (select .cse0 (+ v_main_~a~0.offset_BEFORE_CALL_19 .cse1 12)))) (<= 0 .cse2) (<= .cse2 0)))) is different from true [2023-03-31 20:47:18,652 WARN L861 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0.base_BEFORE_CALL_10 Int) (v_main_~a~0.offset_BEFORE_CALL_20 Int) (v_main_~i~0_86 Int)) (let ((.cse2 (+ v_main_~i~0_86 1))) (and (let ((.cse0 (select |c_#memory_int| v_main_~a~0.base_BEFORE_CALL_10)) (.cse1 (* v_main_~i~0_86 4))) (<= (select .cse0 (+ v_main_~a~0.offset_BEFORE_CALL_20 .cse1 4)) (select .cse0 (+ v_main_~a~0.offset_BEFORE_CALL_20 .cse1 12)))) (<= 0 .cse2) (<= .cse2 0)))) is different from true [2023-03-31 20:47:20,901 INFO L321 Elim1Store]: treesize reduction 32, result has 17.9 percent of original size [2023-03-31 20:47:20,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 16 [2023-03-31 20:47:22,957 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2023-03-31 20:47:22,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:47:23,284 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 20:47:23,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125850725] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:47:23,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [591311813] [2023-03-31 20:47:23,286 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-03-31 20:47:23,286 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:47:23,287 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:47:23,287 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:47:23,287 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:47:23,304 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-03-31 20:47:23,415 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 19 for LOIs [2023-03-31 20:47:23,423 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-03-31 20:47:23,426 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:47:32,008 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1275#(and (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 100000) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:47:32,008 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:47:32,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:47:32,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 14] total 37 [2023-03-31 20:47:32,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710800831] [2023-03-31 20:47:32,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:47:32,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-03-31 20:47:32,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:47:32,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-03-31 20:47:32,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1977, Unknown=9, NotChecked=182, Total=2352 [2023-03-31 20:47:32,010 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 37 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 32 states have internal predecessors, (48), 9 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-03-31 20:47:34,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-31 20:47:48,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-31 20:48:10,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]