/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-lopstr16/break-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 15:18:17,308 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 15:18:17,310 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 15:18:17,341 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 15:18:17,341 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 15:18:17,343 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 15:18:17,345 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 15:18:17,347 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 15:18:17,348 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 15:18:17,351 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 15:18:17,352 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 15:18:17,354 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 15:18:17,354 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 15:18:17,355 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 15:18:17,356 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 15:18:17,357 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 15:18:17,357 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 15:18:17,358 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 15:18:17,359 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 15:18:17,363 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 15:18:17,363 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 15:18:17,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 15:18:17,365 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 15:18:17,366 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 15:18:17,369 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 15:18:17,369 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 15:18:17,369 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 15:18:17,370 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 15:18:17,370 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 15:18:17,371 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 15:18:17,372 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 15:18:17,372 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 15:18:17,373 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 15:18:17,374 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 15:18:17,374 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 15:18:17,374 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 15:18:17,374 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 15:18:17,375 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 15:18:17,375 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 15:18:17,375 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 15:18:17,376 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 15:18:17,377 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 15:18:17,400 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 15:18:17,401 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 15:18:17,401 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 15:18:17,401 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 15:18:17,402 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 15:18:17,402 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 15:18:17,402 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 15:18:17,402 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 15:18:17,402 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 15:18:17,402 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 15:18:17,403 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 15:18:17,403 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 15:18:17,403 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 15:18:17,403 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 15:18:17,403 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 15:18:17,403 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 15:18:17,403 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 15:18:17,403 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 15:18:17,404 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 15:18:17,404 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 15:18:17,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 15:18:17,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 15:18:17,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 15:18:17,405 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 15:18:17,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 15:18:17,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 15:18:17,405 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 15:18:17,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 15:18:17,405 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 15:18:17,405 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 15:18:17,405 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 15:18:17,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 15:18:17,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 15:18:17,406 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 15:18:17,406 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 15:18:17,406 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 15:18:17,406 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 15:18:17,406 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 15:18:17,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 15:18:17,406 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 15:18:17,406 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 15:18:17,407 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 15:18:17,605 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 15:18:17,626 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 15:18:17,628 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 15:18:17,629 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 15:18:17,629 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 15:18:17,630 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-lopstr16/break-2.i [2023-04-02 15:18:18,666 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 15:18:18,827 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 15:18:18,831 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/break-2.i [2023-04-02 15:18:18,834 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f612466c/6c26a12c4ee44c1f8bb196c16744bfb8/FLAG9aa04a7d8 [2023-04-02 15:18:18,845 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f612466c/6c26a12c4ee44c1f8bb196c16744bfb8 [2023-04-02 15:18:18,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 15:18:18,848 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 15:18:18,848 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 15:18:18,849 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 15:18:18,851 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 15:18:18,852 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 03:18:18" (1/1) ... [2023-04-02 15:18:18,852 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2daf5b9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:18:18, skipping insertion in model container [2023-04-02 15:18:18,852 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 03:18:18" (1/1) ... [2023-04-02 15:18:18,857 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 15:18:18,864 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 15:18:18,947 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-lopstr16/break-2.i[800,813] [2023-04-02 15:18:18,955 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 15:18:23,118 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 15:18:23,125 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-lopstr16/break-2.i[800,813] [2023-04-02 15:18:23,128 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 15:18:23,137 INFO L208 MainTranslator]: Completed translation [2023-04-02 15:18:23,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:18:23 WrapperNode [2023-04-02 15:18:23,138 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 15:18:23,139 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 15:18:23,139 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 15:18:23,139 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 15:18:23,146 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:18:23" (1/1) ... [2023-04-02 15:18:23,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:18:23" (1/1) ... [2023-04-02 15:18:23,150 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:18:23" (1/1) ... [2023-04-02 15:18:23,150 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:18:23" (1/1) ... [2023-04-02 15:18:23,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:18:23" (1/1) ... [2023-04-02 15:18:23,155 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:18:23" (1/1) ... [2023-04-02 15:18:23,156 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:18:23" (1/1) ... [2023-04-02 15:18:23,156 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:18:23" (1/1) ... [2023-04-02 15:18:23,157 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 15:18:23,158 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 15:18:23,158 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 15:18:23,158 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 15:18:23,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:18:23" (1/1) ... [2023-04-02 15:18:23,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 15:18:23,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:18:23,194 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 15:18:23,210 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 15:18:23,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 15:18:23,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 15:18:23,217 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 15:18:23,217 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 15:18:23,217 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 15:18:23,217 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 15:18:23,217 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 15:18:23,217 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 15:18:23,218 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 15:18:23,218 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 15:18:23,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 15:18:23,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 15:18:23,218 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 15:18:23,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 15:18:23,218 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 15:18:23,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 15:18:23,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 15:18:23,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 15:18:23,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 15:18:23,282 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 15:18:23,283 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 15:18:23,447 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 15:18:23,468 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 15:18:23,468 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 15:18:23,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 03:18:23 BoogieIcfgContainer [2023-04-02 15:18:23,474 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 15:18:23,476 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 15:18:23,476 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 15:18:23,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 15:18:23,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 03:18:18" (1/3) ... [2023-04-02 15:18:23,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b285689 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 03:18:23, skipping insertion in model container [2023-04-02 15:18:23,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:18:23" (2/3) ... [2023-04-02 15:18:23,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b285689 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 03:18:23, skipping insertion in model container [2023-04-02 15:18:23,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 03:18:23" (3/3) ... [2023-04-02 15:18:23,500 INFO L112 eAbstractionObserver]: Analyzing ICFG break-2.i [2023-04-02 15:18:23,512 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 15:18:23,512 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 15:18:23,550 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 15:18:23,555 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;@66b7586d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 15:18:23,555 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 15:18:23,557 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 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 15:18:23,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-02 15:18:23,561 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:18:23,562 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:18:23,562 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:18:23,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:18:23,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1797247767, now seen corresponding path program 1 times [2023-04-02 15:18:23,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:18:23,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930540880] [2023-04-02 15:18:23,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:18:23,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:18:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:18:23,757 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 15:18:23,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:18:23,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930540880] [2023-04-02 15:18:23,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930540880] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:18:23,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:18:23,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 15:18:23,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930627670] [2023-04-02 15:18:23,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:18:23,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 15:18:23,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:18:23,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 15:18:23,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 15:18:23,792 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 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 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 15:18:23,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:18:23,848 INFO L93 Difference]: Finished difference Result 44 states and 57 transitions. [2023-04-02 15:18:23,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 15:18:23,851 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-04-02 15:18:23,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:18:23,855 INFO L225 Difference]: With dead ends: 44 [2023-04-02 15:18:23,855 INFO L226 Difference]: Without dead ends: 26 [2023-04-02 15:18:23,857 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 15:18:23,860 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 4 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 15:18:23,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 30 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 15:18:23,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-04-02 15:18:23,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2023-04-02 15:18:23,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 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 15:18:23,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-04-02 15:18:23,895 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 13 [2023-04-02 15:18:23,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:18:23,895 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-04-02 15:18:23,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 15:18:23,896 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-04-02 15:18:23,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 15:18:23,896 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:18:23,897 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:18:23,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 15:18:23,897 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:18:23,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:18:23,898 INFO L85 PathProgramCache]: Analyzing trace with hash -195052990, now seen corresponding path program 1 times [2023-04-02 15:18:23,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:18:23,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708654974] [2023-04-02 15:18:23,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:18:23,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:18:23,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:18:23,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:18:23,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:18:23,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708654974] [2023-04-02 15:18:23,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708654974] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:18:23,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449118555] [2023-04-02 15:18:23,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:18:23,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:18:23,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:18:23,983 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 15:18:23,987 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 15:18:24,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:18:24,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 15:18:24,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:18:24,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:18:24,063 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:18:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:18:24,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449118555] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:18:24,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [351281687] [2023-04-02 15:18:24,096 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 15:18:24,096 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:18:24,098 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:18:24,101 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:18:24,101 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:18:24,171 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-04-02 15:18:24,227 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-02 15:18:24,237 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-02 15:18:24,255 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:18:24,673 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '213#(and (<= 1 |#StackHeapBarrier|) (= |~#s~0.base| 3) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= (select (select |#memory_int| 3) 0) 10)) (= |~#s~0.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 15:18:24,673 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:18:24,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:18:24,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-02 15:18:24,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626190057] [2023-04-02 15:18:24,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 15:18:24,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 15:18:24,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:18:24,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 15:18:24,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-04-02 15:18:24,675 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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 15:18:24,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:18:24,715 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2023-04-02 15:18:24,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 15:18:24,715 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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 15 [2023-04-02 15:18:24,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:18:24,716 INFO L225 Difference]: With dead ends: 51 [2023-04-02 15:18:24,716 INFO L226 Difference]: Without dead ends: 37 [2023-04-02 15:18:24,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-04-02 15:18:24,717 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 15:18:24,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 33 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 15:18:24,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-02 15:18:24,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2023-04-02 15:18:24,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 15:18:24,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2023-04-02 15:18:24,722 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 15 [2023-04-02 15:18:24,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:18:24,722 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2023-04-02 15:18:24,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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 15:18:24,722 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2023-04-02 15:18:24,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-02 15:18:24,722 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:18:24,722 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:18:24,732 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 15:18:24,927 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 15:18:24,929 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:18:24,930 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:18:24,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1152100192, now seen corresponding path program 1 times [2023-04-02 15:18:24,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:18:24,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814649054] [2023-04-02 15:18:24,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:18:24,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:18:24,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:18:25,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:18:25,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:18:25,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814649054] [2023-04-02 15:18:25,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814649054] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:18:25,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922171868] [2023-04-02 15:18:25,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:18:25,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:18:25,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:18:25,020 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 15:18:25,022 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 15:18:25,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:18:25,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 15:18:25,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:18:25,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:18:25,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:18:25,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:18:25,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922171868] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:18:25,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1771792504] [2023-04-02 15:18:25,109 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 15:18:25,109 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:18:25,110 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:18:25,110 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:18:25,111 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:18:25,159 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-04-02 15:18:25,197 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-02 15:18:25,211 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-02 15:18:25,220 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:18:25,492 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '453#(and (<= 1 |#StackHeapBarrier|) (= |~#s~0.base| 3) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= (select (select |#memory_int| 3) 0) 10)) (= |~#s~0.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 15:18:25,493 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:18:25,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:18:25,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-04-02 15:18:25,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158115971] [2023-04-02 15:18:25,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 15:18:25,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 15:18:25,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:18:25,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 15:18:25,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2023-04-02 15:18:25,494 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (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 15:18:25,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:18:25,561 INFO L93 Difference]: Finished difference Result 78 states and 95 transitions. [2023-04-02 15:18:25,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 15:18:25,561 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (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 18 [2023-04-02 15:18:25,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:18:25,562 INFO L225 Difference]: With dead ends: 78 [2023-04-02 15:18:25,562 INFO L226 Difference]: Without dead ends: 59 [2023-04-02 15:18:25,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2023-04-02 15:18:25,563 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 42 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:18:25,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 38 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:18:25,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-04-02 15:18:25,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2023-04-02 15:18:25,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 15:18:25,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2023-04-02 15:18:25,569 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 18 [2023-04-02 15:18:25,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:18:25,569 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2023-04-02 15:18:25,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (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 15:18:25,569 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2023-04-02 15:18:25,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-02 15:18:25,570 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:18:25,570 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:18:25,576 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 15:18:25,777 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 15:18:25,777 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:18:25,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:18:25,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1563746108, now seen corresponding path program 2 times [2023-04-02 15:18:25,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:18:25,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655708213] [2023-04-02 15:18:25,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:18:25,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:18:25,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:18:25,867 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:18:25,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:18:25,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655708213] [2023-04-02 15:18:25,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655708213] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:18:25,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299597229] [2023-04-02 15:18:25,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 15:18:25,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:18:25,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:18:25,882 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 15:18:25,883 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 15:18:25,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-04-02 15:18:25,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:18:25,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 15:18:25,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:18:25,948 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:18:25,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:18:26,047 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:18:26,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299597229] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:18:26,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1700493261] [2023-04-02 15:18:26,048 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 15:18:26,049 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:18:26,049 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:18:26,049 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:18:26,049 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:18:26,082 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-04-02 15:18:26,106 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-02 15:18:26,112 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-02 15:18:26,119 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:18:26,365 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '827#(and (<= 1 |#StackHeapBarrier|) (= |~#s~0.base| 3) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= (select (select |#memory_int| 3) 0) 10)) (= |~#s~0.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 15:18:26,365 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:18:26,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:18:26,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-04-02 15:18:26,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272897015] [2023-04-02 15:18:26,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 15:18:26,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-02 15:18:26,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:18:26,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-02 15:18:26,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2023-04-02 15:18:26,367 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 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 15:18:26,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:18:26,518 INFO L93 Difference]: Finished difference Result 154 states and 191 transitions. [2023-04-02 15:18:26,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-02 15:18:26,519 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 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 26 [2023-04-02 15:18:26,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:18:26,520 INFO L225 Difference]: With dead ends: 154 [2023-04-02 15:18:26,520 INFO L226 Difference]: Without dead ends: 115 [2023-04-02 15:18:26,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2023-04-02 15:18:26,521 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 96 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:18:26,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 55 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:18:26,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-04-02 15:18:26,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2023-04-02 15:18:26,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 95 states have (on average 1.0315789473684212) internal successors, (98), 95 states have internal predecessors, (98), 16 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-04-02 15:18:26,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 129 transitions. [2023-04-02 15:18:26,530 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 129 transitions. Word has length 26 [2023-04-02 15:18:26,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:18:26,530 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 129 transitions. [2023-04-02 15:18:26,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 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 15:18:26,530 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 129 transitions. [2023-04-02 15:18:26,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-02 15:18:26,531 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:18:26,531 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:18:26,537 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 15:18:26,735 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 15:18:26,736 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:18:26,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:18:26,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1048238196, now seen corresponding path program 3 times [2023-04-02 15:18:26,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:18:26,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466404677] [2023-04-02 15:18:26,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:18:26,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:18:26,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:18:26,986 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:18:26,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:18:26,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466404677] [2023-04-02 15:18:26,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466404677] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:18:26,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814216078] [2023-04-02 15:18:26,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 15:18:26,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:18:26,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:18:27,007 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 15:18:27,008 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 15:18:27,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 15:18:27,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:18:27,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-02 15:18:27,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:18:27,127 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:18:27,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:18:27,370 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:18:27,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814216078] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:18:27,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1203941142] [2023-04-02 15:18:27,373 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 15:18:27,373 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:18:27,373 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:18:27,373 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:18:27,373 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:18:27,403 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-04-02 15:18:27,430 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-02 15:18:27,436 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-02 15:18:27,445 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:18:27,801 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1501#(and (<= 1 |#StackHeapBarrier|) (= |~#s~0.base| 3) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= (select (select |#memory_int| 3) 0) 10)) (= |~#s~0.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 15:18:27,801 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:18:27,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:18:27,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2023-04-02 15:18:27,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562913277] [2023-04-02 15:18:27,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 15:18:27,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-02 15:18:27,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:18:27,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-02 15:18:27,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=1345, Unknown=0, NotChecked=0, Total=1980 [2023-04-02 15:18:27,804 INFO L87 Difference]: Start difference. First operand 114 states and 129 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 33 states have internal predecessors, (72), 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 15:18:28,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:18:28,055 INFO L93 Difference]: Finished difference Result 306 states and 383 transitions. [2023-04-02 15:18:28,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-04-02 15:18:28,055 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 33 states have internal predecessors, (72), 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 42 [2023-04-02 15:18:28,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:18:28,057 INFO L225 Difference]: With dead ends: 306 [2023-04-02 15:18:28,057 INFO L226 Difference]: Without dead ends: 227 [2023-04-02 15:18:28,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=635, Invalid=1345, Unknown=0, NotChecked=0, Total=1980 [2023-04-02 15:18:28,059 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 264 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 15:18:28,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 72 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 15:18:28,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-04-02 15:18:28,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2023-04-02 15:18:28,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 191 states have (on average 1.0157068062827226) internal successors, (194), 191 states have internal predecessors, (194), 32 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-04-02 15:18:28,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 257 transitions. [2023-04-02 15:18:28,078 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 257 transitions. Word has length 42 [2023-04-02 15:18:28,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:18:28,078 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 257 transitions. [2023-04-02 15:18:28,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 33 states have internal predecessors, (72), 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 15:18:28,078 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 257 transitions. [2023-04-02 15:18:28,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-02 15:18:28,080 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:18:28,080 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:18:28,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 15:18:28,285 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 15:18:28,285 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:18:28,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:18:28,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1104512284, now seen corresponding path program 4 times [2023-04-02 15:18:28,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:18:28,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258566494] [2023-04-02 15:18:28,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:18:28,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:18:28,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:18:28,977 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:18:28,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:18:28,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258566494] [2023-04-02 15:18:28,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258566494] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:18:28,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072230687] [2023-04-02 15:18:28,978 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 15:18:28,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:18:28,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:18:28,979 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 15:18:28,982 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 15:18:29,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:18:29,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 32 conjunts are in the unsatisfiable core [2023-04-02 15:18:29,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:18:29,139 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:18:29,139 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:18:30,169 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:18:30,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072230687] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:18:30,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1663622765] [2023-04-02 15:18:30,170 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 15:18:30,170 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:18:30,171 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:18:30,171 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:18:30,171 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:18:30,199 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-04-02 15:18:30,227 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2023-04-02 15:18:30,233 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs [2023-04-02 15:18:30,240 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:18:30,588 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2775#(and (<= 1 |#StackHeapBarrier|) (= |~#s~0.base| 3) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= (select (select |#memory_int| 3) 0) 10)) (= |~#s~0.offset| 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 15:18:30,588 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:18:30,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 15:18:30,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2023-04-02 15:18:30,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231928532] [2023-04-02 15:18:30,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 15:18:30,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-04-02 15:18:30,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:18:30,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-04-02 15:18:30,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2251, Invalid=3601, Unknown=0, NotChecked=0, Total=5852 [2023-04-02 15:18:30,594 INFO L87 Difference]: Start difference. First operand 226 states and 257 transitions. Second operand has 65 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 65 states have internal predecessors, (136), 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 15:18:31,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:18:31,347 INFO L93 Difference]: Finished difference Result 610 states and 767 transitions. [2023-04-02 15:18:31,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-04-02 15:18:31,349 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 65 states have internal predecessors, (136), 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 74 [2023-04-02 15:18:31,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:18:31,353 INFO L225 Difference]: With dead ends: 610 [2023-04-02 15:18:31,353 INFO L226 Difference]: Without dead ends: 451 [2023-04-02 15:18:31,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2251, Invalid=3601, Unknown=0, NotChecked=0, Total=5852 [2023-04-02 15:18:31,359 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 789 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 498 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 15:18:31,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [851 Valid, 112 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [498 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 15:18:31,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2023-04-02 15:18:31,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 450. [2023-04-02 15:18:31,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 383 states have (on average 1.0078328981723237) internal successors, (386), 383 states have internal predecessors, (386), 64 states have call successors, (64), 3 states have call predecessors, (64), 2 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2023-04-02 15:18:31,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 513 transitions. [2023-04-02 15:18:31,380 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 513 transitions. Word has length 74 [2023-04-02 15:18:31,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:18:31,380 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 513 transitions. [2023-04-02 15:18:31,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 65 states have internal predecessors, (136), 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 15:18:31,380 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 513 transitions. [2023-04-02 15:18:31,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-04-02 15:18:31,383 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:18:31,383 INFO L195 NwaCegarLoop]: trace histogram [63, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:18:31,393 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 15:18:31,588 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 15:18:31,588 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:18:31,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:18:31,588 INFO L85 PathProgramCache]: Analyzing trace with hash 177766340, now seen corresponding path program 5 times [2023-04-02 15:18:31,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:18:31,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784339664] [2023-04-02 15:18:31,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:18:31,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:18:31,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:18:33,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:18:33,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:18:33,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784339664] [2023-04-02 15:18:33,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784339664] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:18:33,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561682915] [2023-04-02 15:18:33,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 15:18:33,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:18:33,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:18:33,846 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 15:18:33,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process