/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 OctagonDomain -i ../sv-benchmarks/c/array-examples/standard_init2_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 14:05:20,106 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 14:05:20,108 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 14:05:20,151 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 14:05:20,151 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 14:05:20,154 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 14:05:20,156 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 14:05:20,159 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 14:05:20,160 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 14:05:20,165 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 14:05:20,166 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 14:05:20,168 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 14:05:20,168 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 14:05:20,173 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 14:05:20,176 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 14:05:20,177 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 14:05:20,178 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 14:05:20,178 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 14:05:20,180 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 14:05:20,186 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 14:05:20,187 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 14:05:20,188 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 14:05:20,189 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 14:05:20,190 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 14:05:20,197 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 14:05:20,198 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 14:05:20,198 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 14:05:20,199 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 14:05:20,199 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 14:05:20,200 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 14:05:20,200 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 14:05:20,200 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 14:05:20,201 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 14:05:20,201 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 14:05:20,202 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 14:05:20,202 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 14:05:20,203 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 14:05:20,203 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 14:05:20,203 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 14:05:20,204 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 14:05:20,204 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 14:05:20,205 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 14:05:20,237 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 14:05:20,238 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 14:05:20,239 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 14:05:20,239 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 14:05:20,240 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 14:05:20,240 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 14:05:20,240 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 14:05:20,240 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 14:05:20,240 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 14:05:20,240 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 14:05:20,241 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 14:05:20,241 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 14:05:20,241 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 14:05:20,241 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 14:05:20,241 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 14:05:20,242 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 14:05:20,242 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 14:05:20,242 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 14:05:20,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 14:05:20,243 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 14:05:20,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 14:05:20,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 14:05:20,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 14:05:20,243 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 14:05:20,243 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 14:05:20,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 14:05:20,244 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 14:05:20,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 14:05:20,244 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 14:05:20,244 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 14:05:20,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 14:05:20,245 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 14:05:20,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:05:20,245 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 14:05:20,245 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 14:05:20,245 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 14:05:20,245 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 14:05:20,246 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 14:05:20,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 14:05:20,246 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 14:05:20,246 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 14:05:20,246 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 14:05:20,434 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 14:05:20,452 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 14:05:20,454 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 14:05:20,456 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 14:05:20,456 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 14:05:20,458 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_init2_ground-2.i [2023-04-02 14:05:21,673 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 14:05:21,825 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 14:05:21,825 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init2_ground-2.i [2023-04-02 14:05:21,829 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00cfc17dd/b3c7c1edc1c844fba49945e3fdc5e1dd/FLAG5a89a067f [2023-04-02 14:05:21,843 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00cfc17dd/b3c7c1edc1c844fba49945e3fdc5e1dd [2023-04-02 14:05:21,845 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 14:05:21,846 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 14:05:21,847 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 14:05:21,848 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 14:05:21,855 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 14:05:21,855 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:05:21" (1/1) ... [2023-04-02 14:05:21,857 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@713b7213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:05:21, skipping insertion in model container [2023-04-02 14:05:21,857 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:05:21" (1/1) ... [2023-04-02 14:05:21,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 14:05:21,881 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 14:05:22,036 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-examples/standard_init2_ground-2.i[816,829] [2023-04-02 14:05:22,050 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:05:22,059 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 14:05:22,070 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-examples/standard_init2_ground-2.i[816,829] [2023-04-02 14:05:22,078 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:05:22,091 INFO L208 MainTranslator]: Completed translation [2023-04-02 14:05:22,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:05:22 WrapperNode [2023-04-02 14:05:22,091 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 14:05:22,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 14:05:22,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 14:05:22,093 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 14:05:22,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:05:22" (1/1) ... [2023-04-02 14:05:22,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:05:22" (1/1) ... [2023-04-02 14:05:22,107 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:05:22" (1/1) ... [2023-04-02 14:05:22,108 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:05:22" (1/1) ... [2023-04-02 14:05:22,121 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:05:22" (1/1) ... [2023-04-02 14:05:22,125 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:05:22" (1/1) ... [2023-04-02 14:05:22,129 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:05:22" (1/1) ... [2023-04-02 14:05:22,130 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:05:22" (1/1) ... [2023-04-02 14:05:22,133 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 14:05:22,134 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 14:05:22,134 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 14:05:22,134 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 14:05:22,135 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:05:22" (1/1) ... [2023-04-02 14:05:22,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:05:22,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:05:22,166 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 14:05:22,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 14:05:22,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 14:05:22,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 14:05:22,210 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 14:05:22,210 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 14:05:22,210 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 14:05:22,210 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 14:05:22,210 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 14:05:22,210 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 14:05:22,210 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 14:05:22,210 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 14:05:22,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 14:05:22,211 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 14:05:22,211 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 14:05:22,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 14:05:22,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 14:05:22,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 14:05:22,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 14:05:22,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 14:05:22,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 14:05:22,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 14:05:22,288 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 14:05:22,290 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 14:05:22,439 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 14:05:22,460 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 14:05:22,460 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-02 14:05:22,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:05:22 BoogieIcfgContainer [2023-04-02 14:05:22,477 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 14:05:22,479 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 14:05:22,493 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 14:05:22,496 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 14:05:22,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 02:05:21" (1/3) ... [2023-04-02 14:05:22,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@307825db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:05:22, skipping insertion in model container [2023-04-02 14:05:22,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:05:22" (2/3) ... [2023-04-02 14:05:22,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@307825db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:05:22, skipping insertion in model container [2023-04-02 14:05:22,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:05:22" (3/3) ... [2023-04-02 14:05:22,498 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_init2_ground-2.i [2023-04-02 14:05:22,514 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 14:05:22,514 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 14:05:22,563 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 14:05:22,569 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;@5964f5e7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 14:05:22,570 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 14:05:22,573 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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) [2023-04-02 14:05:22,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-02 14:05:22,580 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:05:22,581 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:05:22,582 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:05:22,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:05:22,587 INFO L85 PathProgramCache]: Analyzing trace with hash 997158019, now seen corresponding path program 1 times [2023-04-02 14:05:22,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:05:22,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334365393] [2023-04-02 14:05:22,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:05:22,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:05:22,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:05:22,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:05:22,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:05:22,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334365393] [2023-04-02 14:05:22,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334365393] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:05:22,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 14:05:22,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 14:05:22,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987271047] [2023-04-02 14:05:22,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:05:22,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 14:05:22,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:05:22,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 14:05:22,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:05:22,808 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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) [2023-04-02 14:05:22,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:05:22,844 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2023-04-02 14:05:22,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 14:05:22,846 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 [2023-04-02 14:05:22,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:05:22,852 INFO L225 Difference]: With dead ends: 34 [2023-04-02 14:05:22,852 INFO L226 Difference]: Without dead ends: 18 [2023-04-02 14:05:22,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 14:05:22,857 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 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 [2023-04-02 14:05:22,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:05:22,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-04-02 14:05:22,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-04-02 14:05:22,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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) [2023-04-02 14:05:22,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-04-02 14:05:22,912 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2023-04-02 14:05:22,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:05:22,912 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-04-02 14:05:22,912 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) [2023-04-02 14:05:22,912 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-04-02 14:05:22,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 14:05:22,913 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:05:22,913 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:05:22,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 14:05:22,914 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:05:22,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:05:22,915 INFO L85 PathProgramCache]: Analyzing trace with hash 94848626, now seen corresponding path program 1 times [2023-04-02 14:05:22,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:05:22,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192094648] [2023-04-02 14:05:22,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:05:22,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:05:22,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:05:23,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 14:05:23,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:05:23,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192094648] [2023-04-02 14:05:23,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192094648] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:05:23,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895220590] [2023-04-02 14:05:23,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:05:23,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:05:23,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:05:23,077 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:05:23,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 14:05:23,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:05:23,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 14:05:23,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:05:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 14:05:23,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:05:23,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 14:05:23,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895220590] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:05:23,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1674249502] [2023-04-02 14:05:23,258 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 14:05:23,258 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:05:23,262 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:05:23,267 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:05:23,268 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:05:23,381 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:05:23,556 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-04-02 14:05:23,601 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:05:23,610 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:05:23,949 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '191#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_1| Int)) (and (<= 2 |v_main_~#a~0.base_BEFORE_CALL_1|) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_1|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_1|)) (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_1|) 0) 43)))) (= |#NULL.base| 0))' at error location [2023-04-02 14:05:23,950 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:05:23,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:05:23,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 14:05:23,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020471855] [2023-04-02 14:05:23,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:05:23,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 14:05:23,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:05:23,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 14:05:23,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-04-02 14:05:23,954 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) [2023-04-02 14:05:23,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:05:23,982 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2023-04-02 14:05:23,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 14:05:23,982 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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 14 [2023-04-02 14:05:23,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:05:23,983 INFO L225 Difference]: With dead ends: 35 [2023-04-02 14:05:23,983 INFO L226 Difference]: Without dead ends: 24 [2023-04-02 14:05:23,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-04-02 14:05:23,985 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:05:23,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:05:23,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-02 14:05:23,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-04-02 14:05:23,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 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) [2023-04-02 14:05:23,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2023-04-02 14:05:23,990 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2023-04-02 14:05:23,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:05:23,991 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2023-04-02 14:05:23,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) [2023-04-02 14:05:23,991 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2023-04-02 14:05:23,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-02 14:05:23,992 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:05:23,992 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:05:24,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 14:05:24,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:05:24,198 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:05:24,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:05:24,199 INFO L85 PathProgramCache]: Analyzing trace with hash -671062205, now seen corresponding path program 2 times [2023-04-02 14:05:24,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:05:24,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045282112] [2023-04-02 14:05:24,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:05:24,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:05:24,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:05:24,380 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 14:05:24,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:05:24,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045282112] [2023-04-02 14:05:24,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045282112] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:05:24,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656743494] [2023-04-02 14:05:24,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:05:24,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:05:24,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:05:24,383 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:05:24,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 14:05:24,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 14:05:24,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:05:24,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 14:05:24,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:05:24,509 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 14:05:24,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:05:24,561 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 14:05:24,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656743494] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:05:24,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [8664584] [2023-04-02 14:05:24,564 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 14:05:24,564 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:05:24,564 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:05:24,565 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:05:24,565 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:05:24,600 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:05:24,672 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-04-02 14:05:24,690 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:05:24,698 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:05:24,998 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '429#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#a~0.base_BEFORE_CALL_2| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_2|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_2|)) (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_2|) 0) 43)) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_2|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:05:24,999 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:05:24,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:05:24,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-04-02 14:05:24,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086708239] [2023-04-02 14:05:25,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:05:25,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 14:05:25,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:05:25,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 14:05:25,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2023-04-02 14:05:25,002 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 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) [2023-04-02 14:05:25,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:05:25,066 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2023-04-02 14:05:25,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 14:05:25,066 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 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 20 [2023-04-02 14:05:25,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:05:25,069 INFO L225 Difference]: With dead ends: 50 [2023-04-02 14:05:25,070 INFO L226 Difference]: Without dead ends: 36 [2023-04-02 14:05:25,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2023-04-02 14:05:25,073 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:05:25,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:05:25,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-04-02 14:05:25,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-04-02 14:05:25,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 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) [2023-04-02 14:05:25,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2023-04-02 14:05:25,083 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 20 [2023-04-02 14:05:25,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:05:25,083 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2023-04-02 14:05:25,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 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) [2023-04-02 14:05:25,083 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2023-04-02 14:05:25,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-02 14:05:25,084 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:05:25,084 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:05:25,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 14:05:25,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-02 14:05:25,291 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:05:25,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:05:25,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1846016867, now seen corresponding path program 3 times [2023-04-02 14:05:25,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:05:25,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718774745] [2023-04-02 14:05:25,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:05:25,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:05:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:05:25,526 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-02 14:05:25,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:05:25,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718774745] [2023-04-02 14:05:25,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718774745] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:05:25,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668634293] [2023-04-02 14:05:25,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:05:25,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:05:25,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:05:25,530 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:05:25,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 14:05:25,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:05:25,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:05:25,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 14:05:25,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:05:25,656 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-02 14:05:25,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:05:25,864 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-02 14:05:25,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668634293] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:05:25,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [224776133] [2023-04-02 14:05:25,872 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 14:05:25,872 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:05:25,872 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:05:25,872 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:05:25,873 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:05:25,901 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:05:25,972 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-04-02 14:05:25,986 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:05:25,990 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:05:26,278 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '805#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#a~0.base_BEFORE_CALL_3| Int)) (and (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_3|) 0) 43)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_3|) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_3|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_3|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:05:26,278 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:05:26,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:05:26,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-02 14:05:26,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808077043] [2023-04-02 14:05:26,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:05:26,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-02 14:05:26,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:05:26,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-02 14:05:26,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2023-04-02 14:05:26,281 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 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) [2023-04-02 14:05:26,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:05:26,394 INFO L93 Difference]: Finished difference Result 80 states and 107 transitions. [2023-04-02 14:05:26,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-02 14:05:26,395 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 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 32 [2023-04-02 14:05:26,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:05:26,396 INFO L225 Difference]: With dead ends: 80 [2023-04-02 14:05:26,396 INFO L226 Difference]: Without dead ends: 60 [2023-04-02 14:05:26,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2023-04-02 14:05:26,398 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:05:26,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:05:26,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-04-02 14:05:26,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-04-02 14:05:26,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 states have internal predecessors, (57), 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) [2023-04-02 14:05:26,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2023-04-02 14:05:26,405 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 32 [2023-04-02 14:05:26,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:05:26,405 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2023-04-02 14:05:26,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 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) [2023-04-02 14:05:26,406 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2023-04-02 14:05:26,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-02 14:05:26,407 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:05:26,407 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:05:26,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 14:05:26,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:05:26,608 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:05:26,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:05:26,608 INFO L85 PathProgramCache]: Analyzing trace with hash 277920675, now seen corresponding path program 4 times [2023-04-02 14:05:26,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:05:26,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640227511] [2023-04-02 14:05:26,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:05:26,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:05:26,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:05:27,218 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-02 14:05:27,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:05:27,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640227511] [2023-04-02 14:05:27,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640227511] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:05:27,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890738972] [2023-04-02 14:05:27,219 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:05:27,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:05:27,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:05:27,221 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:05:27,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 14:05:27,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:05:27,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-02 14:05:27,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:05:27,371 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-02 14:05:27,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:05:28,043 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-04-02 14:05:28,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890738972] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:05:28,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [225395140] [2023-04-02 14:05:28,046 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 14:05:28,046 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:05:28,047 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:05:28,047 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:05:28,047 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:05:28,070 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:05:28,140 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-04-02 14:05:28,153 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:05:28,156 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:05:28,495 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1457#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#a~0.base_BEFORE_CALL_4| Int)) (and (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_4|) 0) 43)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_4|) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_4|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_4|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:05:28,496 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:05:28,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:05:28,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-04-02 14:05:28,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294111978] [2023-04-02 14:05:28,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:05:28,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-04-02 14:05:28,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:05:28,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-04-02 14:05:28,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1210, Invalid=2212, Unknown=0, NotChecked=0, Total=3422 [2023-04-02 14:05:28,500 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 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) [2023-04-02 14:05:28,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:05:28,714 INFO L93 Difference]: Finished difference Result 140 states and 191 transitions. [2023-04-02 14:05:28,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-04-02 14:05:28,715 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 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 56 [2023-04-02 14:05:28,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:05:28,718 INFO L225 Difference]: With dead ends: 140 [2023-04-02 14:05:28,718 INFO L226 Difference]: Without dead ends: 108 [2023-04-02 14:05:28,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1210, Invalid=2212, Unknown=0, NotChecked=0, Total=3422 [2023-04-02 14:05:28,721 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:05:28,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:05:28,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-04-02 14:05:28,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2023-04-02 14:05:28,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 102 states have internal predecessors, (105), 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) [2023-04-02 14:05:28,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2023-04-02 14:05:28,746 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 56 [2023-04-02 14:05:28,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:05:28,747 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2023-04-02 14:05:28,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 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) [2023-04-02 14:05:28,747 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2023-04-02 14:05:28,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-04-02 14:05:28,752 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:05:28,752 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:05:28,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-02 14:05:28,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:05:28,959 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:05:28,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:05:28,960 INFO L85 PathProgramCache]: Analyzing trace with hash -350184413, now seen corresponding path program 5 times [2023-04-02 14:05:28,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:05:28,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217671547] [2023-04-02 14:05:28,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:05:28,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:05:29,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:05:30,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2023-04-02 14:05:30,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:05:30,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217671547] [2023-04-02 14:05:30,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217671547] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:05:30,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502154792] [2023-04-02 14:05:30,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:05:30,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:05:30,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:05:30,949 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:05:30,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 14:09:19,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2023-04-02 14:09:19,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:09:19,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-02 14:09:19,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:09:19,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2023-04-02 14:09:19,695 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:09:21,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2023-04-02 14:09:21,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502154792] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:09:21,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1121799212] [2023-04-02 14:09:21,951 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 14:09:21,952 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:09:21,952 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:09:21,952 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:09:21,952 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:09:21,966 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:09:22,011 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-04-02 14:09:22,029 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:09:22,032 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:09:22,451 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2661#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_main_~#a~0.base_BEFORE_CALL_5| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_5|) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_5|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_5|)) (not (= 43 (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_5|) 0))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:09:22,451 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:09:22,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:09:22,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2023-04-02 14:09:22,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454064238] [2023-04-02 14:09:22,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:09:22,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-04-02 14:09:22,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:09:22,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-04-02 14:09:22,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4690, Invalid=6652, Unknown=0, NotChecked=0, Total=11342 [2023-04-02 14:09:22,459 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand has 97 states, 97 states have (on average 1.577319587628866) internal successors, (153), 97 states have internal predecessors, (153), 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) [2023-04-02 14:09:23,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:09:23,058 INFO L93 Difference]: Finished difference Result 260 states and 359 transitions. [2023-04-02 14:09:23,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-04-02 14:09:23,059 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.577319587628866) internal successors, (153), 97 states have internal predecessors, (153), 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 104 [2023-04-02 14:09:23,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:09:23,062 INFO L225 Difference]: With dead ends: 260 [2023-04-02 14:09:23,062 INFO L226 Difference]: Without dead ends: 204 [2023-04-02 14:09:23,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1604 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4690, Invalid=6652, Unknown=0, NotChecked=0, Total=11342 [2023-04-02 14:09:23,067 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 14:09:23,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 14:09:23,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-04-02 14:09:23,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2023-04-02 14:09:23,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 198 states have (on average 1.0151515151515151) internal successors, (201), 198 states have internal predecessors, (201), 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) [2023-04-02 14:09:23,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 206 transitions. [2023-04-02 14:09:23,096 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 206 transitions. Word has length 104 [2023-04-02 14:09:23,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:09:23,096 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 206 transitions. [2023-04-02 14:09:23,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.577319587628866) internal successors, (153), 97 states have internal predecessors, (153), 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) [2023-04-02 14:09:23,096 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 206 transitions. [2023-04-02 14:09:23,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-04-02 14:09:23,098 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:09:23,098 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:09:23,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 14:09:23,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:09:23,317 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:09:23,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:09:23,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1225138909, now seen corresponding path program 6 times [2023-04-02 14:09:23,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:09:23,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519846841] [2023-04-02 14:09:23,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:09:23,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:09:23,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:09:29,245 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2023-04-02 14:09:29,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:09:29,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519846841] [2023-04-02 14:09:29,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519846841] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:09:29,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118041426] [2023-04-02 14:09:29,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:09:29,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:09:29,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:09:29,247 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:09:29,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 14:09:29,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:09:29,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:09:29,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 1386 conjuncts, 96 conjunts are in the unsatisfiable core [2023-04-02 14:09:29,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:09:29,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2023-04-02 14:09:29,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:09:37,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2023-04-02 14:09:37,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118041426] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:09:37,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1578234349] [2023-04-02 14:09:37,797 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-02 14:09:37,797 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:09:37,797 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:09:37,797 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:09:37,797 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:09:37,825 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 14:09:37,874 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-04-02 14:09:37,885 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 14:09:37,891 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:09:38,503 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4969#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#a~0.base_BEFORE_CALL_6| Int)) (and (<= (+ |#StackHeapBarrier| 1) |v_main_~#a~0.base_BEFORE_CALL_6|) (<= 3 (+ |#StackHeapBarrier| |v_main_~#a~0.base_BEFORE_CALL_6|)) (not (= (select (select |#memory_int| |v_main_~#a~0.base_BEFORE_CALL_6|) 0) 43)) (<= 2 |v_main_~#a~0.base_BEFORE_CALL_6|))) (= |#NULL.base| 0))' at error location [2023-04-02 14:09:38,503 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:09:38,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 14:09:38,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2023-04-02 14:09:38,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896083426] [2023-04-02 14:09:38,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 14:09:38,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2023-04-02 14:09:38,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:09:38,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2023-04-02 14:09:38,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18562, Invalid=22444, Unknown=0, NotChecked=0, Total=41006 [2023-04-02 14:09:38,515 INFO L87 Difference]: Start difference. First operand 204 states and 206 transitions. Second operand has 193 states, 193 states have (on average 1.0414507772020725) internal successors, (201), 193 states have internal predecessors, (201), 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) [2023-04-02 14:09:43,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:09:43,557 INFO L93 Difference]: Finished difference Result 500 states and 695 transitions. [2023-04-02 14:09:43,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2023-04-02 14:09:43,558 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.0414507772020725) internal successors, (201), 193 states have internal predecessors, (201), 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 200 [2023-04-02 14:09:43,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:09:43,563 INFO L225 Difference]: With dead ends: 500 [2023-04-02 14:09:43,563 INFO L226 Difference]: Without dead ends: 396 [2023-04-02 14:09:43,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 696 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3236 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=18562, Invalid=22444, Unknown=0, NotChecked=0, Total=41006 [2023-04-02 14:09:43,569 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 916 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 916 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 14:09:43,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 1322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [916 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 14:09:43,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2023-04-02 14:09:43,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 396. [2023-04-02 14:09:43,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 390 states have (on average 1.0076923076923077) internal successors, (393), 390 states have internal predecessors, (393), 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) [2023-04-02 14:09:43,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 398 transitions. [2023-04-02 14:09:43,588 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 398 transitions. Word has length 200 [2023-04-02 14:09:43,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:09:43,588 INFO L495 AbstractCegarLoop]: Abstraction has 396 states and 398 transitions. [2023-04-02 14:09:43,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.0414507772020725) internal successors, (201), 193 states have internal predecessors, (201), 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) [2023-04-02 14:09:43,589 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 398 transitions. [2023-04-02 14:09:43,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2023-04-02 14:09:43,594 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:09:43,594 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:09:43,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 14:09:43,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:09:43,802 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:09:43,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:09:43,803 INFO L85 PathProgramCache]: Analyzing trace with hash -275620061, now seen corresponding path program 7 times [2023-04-02 14:09:43,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:09:43,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080947298] [2023-04-02 14:09:43,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:09:43,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:09:44,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat