/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/array-tiling/rewnif.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 08:52:01,965 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 08:52:01,968 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 08:52:02,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 08:52:02,012 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 08:52:02,015 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 08:52:02,018 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 08:52:02,021 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 08:52:02,022 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 08:52:02,028 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 08:52:02,030 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 08:52:02,031 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 08:52:02,031 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 08:52:02,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 08:52:02,037 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 08:52:02,038 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 08:52:02,039 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 08:52:02,039 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 08:52:02,040 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 08:52:02,042 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 08:52:02,043 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 08:52:02,045 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 08:52:02,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 08:52:02,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 08:52:02,054 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 08:52:02,054 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 08:52:02,055 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 08:52:02,056 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 08:52:02,056 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 08:52:02,057 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 08:52:02,057 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 08:52:02,058 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 08:52:02,059 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 08:52:02,059 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 08:52:02,060 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 08:52:02,060 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 08:52:02,061 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 08:52:02,061 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 08:52:02,061 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 08:52:02,062 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 08:52:02,062 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 08:52:02,063 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 08:52:02,095 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 08:52:02,095 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 08:52:02,095 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 08:52:02,095 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 08:52:02,096 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 08:52:02,096 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 08:52:02,096 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 08:52:02,097 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 08:52:02,097 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 08:52:02,097 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 08:52:02,098 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 08:52:02,098 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 08:52:02,098 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 08:52:02,098 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 08:52:02,098 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 08:52:02,098 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 08:52:02,098 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 08:52:02,098 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 08:52:02,099 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 08:52:02,099 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 08:52:02,099 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 08:52:02,099 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 08:52:02,099 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 08:52:02,100 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 08:52:02,100 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 08:52:02,100 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 08:52:02,100 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 08:52:02,101 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 08:52:02,101 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 08:52:02,101 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 08:52:02,101 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 08:52:02,101 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 08:52:02,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:52:02,101 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 08:52:02,102 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 08:52:02,102 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 08:52:02,102 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 08:52:02,102 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 08:52:02,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 08:52:02,102 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 08:52:02,102 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 08:52:02,102 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 08:52:02,333 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 08:52:02,361 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 08:52:02,363 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 08:52:02,364 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 08:52:02,365 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 08:52:02,366 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/rewnif.c [2023-04-01 08:52:03,532 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 08:52:03,715 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 08:52:03,716 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/rewnif.c [2023-04-01 08:52:03,721 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b49411cf0/63cbcbbd75064b16b7001c8263543846/FLAG13378bb56 [2023-04-01 08:52:03,737 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b49411cf0/63cbcbbd75064b16b7001c8263543846 [2023-04-01 08:52:03,741 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 08:52:03,743 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 08:52:03,744 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 08:52:03,744 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 08:52:03,747 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 08:52:03,749 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:52:03" (1/1) ... [2023-04-01 08:52:03,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22d92583 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:52:03, skipping insertion in model container [2023-04-01 08:52:03,750 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:52:03" (1/1) ... [2023-04-01 08:52:03,756 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 08:52:03,769 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 08:52:03,916 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/rewnif.c[397,410] [2023-04-01 08:52:03,935 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:52:03,946 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 08:52:03,956 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/rewnif.c[397,410] [2023-04-01 08:52:03,964 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:52:03,981 INFO L208 MainTranslator]: Completed translation [2023-04-01 08:52:03,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:52:03 WrapperNode [2023-04-01 08:52:03,982 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 08:52:03,983 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 08:52:03,983 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 08:52:03,983 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 08:52:03,995 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:52:03" (1/1) ... [2023-04-01 08:52:03,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:52:03" (1/1) ... [2023-04-01 08:52:04,001 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:52:03" (1/1) ... [2023-04-01 08:52:04,002 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:52:03" (1/1) ... [2023-04-01 08:52:04,015 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:52:03" (1/1) ... [2023-04-01 08:52:04,019 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:52:03" (1/1) ... [2023-04-01 08:52:04,024 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:52:03" (1/1) ... [2023-04-01 08:52:04,025 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:52:03" (1/1) ... [2023-04-01 08:52:04,027 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 08:52:04,028 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 08:52:04,028 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 08:52:04,029 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 08:52:04,030 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:52:03" (1/1) ... [2023-04-01 08:52:04,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:52:04,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:52:04,062 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 08:52:04,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 08:52:04,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 08:52:04,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 08:52:04,097 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 08:52:04,098 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 08:52:04,098 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 08:52:04,098 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 08:52:04,098 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 08:52:04,098 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 08:52:04,098 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 08:52:04,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 08:52:04,098 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 08:52:04,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 08:52:04,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 08:52:04,099 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 08:52:04,099 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 08:52:04,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 08:52:04,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 08:52:04,099 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 08:52:04,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 08:52:04,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 08:52:04,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 08:52:04,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 08:52:04,159 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 08:52:04,161 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 08:52:04,374 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 08:52:04,431 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 08:52:04,435 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 08:52:04,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:52:04 BoogieIcfgContainer [2023-04-01 08:52:04,438 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 08:52:04,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 08:52:04,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 08:52:04,450 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 08:52:04,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:52:03" (1/3) ... [2023-04-01 08:52:04,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f91718 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:52:04, skipping insertion in model container [2023-04-01 08:52:04,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:52:03" (2/3) ... [2023-04-01 08:52:04,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f91718 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:52:04, skipping insertion in model container [2023-04-01 08:52:04,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:52:04" (3/3) ... [2023-04-01 08:52:04,452 INFO L112 eAbstractionObserver]: Analyzing ICFG rewnif.c [2023-04-01 08:52:04,483 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 08:52:04,484 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 08:52:04,541 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 08:52:04,547 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;@eb09e47, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 08:52:04,548 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 08:52:04,552 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 08:52:04,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-01 08:52:04,558 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:52:04,559 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:52:04,560 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:52:04,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:52:04,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1538200716, now seen corresponding path program 1 times [2023-04-01 08:52:04,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:52:04,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798126678] [2023-04-01 08:52:04,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:52:04,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:52:04,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:52:04,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:52:04,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:52:04,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798126678] [2023-04-01 08:52:04,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798126678] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:52:04,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 08:52:04,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 08:52:04,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271355491] [2023-04-01 08:52:04,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:52:04,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 08:52:04,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:52:04,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 08:52:04,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 08:52:04,943 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:52:04,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:52:04,992 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2023-04-01 08:52:04,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 08:52:04,995 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 [2023-04-01 08:52:04,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:52:05,001 INFO L225 Difference]: With dead ends: 34 [2023-04-01 08:52:05,001 INFO L226 Difference]: Without dead ends: 17 [2023-04-01 08:52:05,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 08:52:05,008 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:52:05,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:52:05,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-04-01 08:52:05,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-04-01 08:52:05,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 08:52:05,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2023-04-01 08:52:05,043 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2023-04-01 08:52:05,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:52:05,045 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2023-04-01 08:52:05,045 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) [2023-04-01 08:52:05,045 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2023-04-01 08:52:05,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-01 08:52:05,046 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:52:05,046 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:52:05,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 08:52:05,047 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:52:05,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:52:05,050 INFO L85 PathProgramCache]: Analyzing trace with hash -866847342, now seen corresponding path program 1 times [2023-04-01 08:52:05,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:52:05,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54934848] [2023-04-01 08:52:05,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:52:05,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:52:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:52:05,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:52:05,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:52:05,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54934848] [2023-04-01 08:52:05,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54934848] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:52:05,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642327555] [2023-04-01 08:52:05,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:52:05,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:52:05,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:52:05,241 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:52:05,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 08:52:05,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:52:05,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 08:52:05,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:52:05,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:52:05,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:52:05,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:52:05,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642327555] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:52:05,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [587932169] [2023-04-01 08:52:05,523 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 08:52:05,523 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:52:05,526 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:52:05,531 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:52:05,531 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:52:05,696 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2023-04-01 08:52:06,290 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 78 for LOIs [2023-04-01 08:52:06,367 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 08:52:06,376 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:52:07,246 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '180#(and (exists ((v_main_~a~0.base_BEFORE_CALL_1 Int) (|v_old(#length)_BEFORE_CALL_1| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_1| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_1| (Array Int Int))) (and (= (select |v_old(#valid)_BEFORE_CALL_1| 3) 1) (not (= |v_old(#valid)_BEFORE_CALL_1| |v_old(#length)_BEFORE_CALL_1|)) (= (select |v_old(#length)_BEFORE_CALL_1| 3) 12) (not (= (select |v_old(#memory_int)_BEFORE_CALL_1| 1) |v_old(#valid)_BEFORE_CALL_1|)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_1| 1) 0)) (= (select |v_old(#valid)_BEFORE_CALL_1| 1) 1) (not (= v_main_~a~0.base_BEFORE_CALL_1 0)) (not (= v_main_~a~0.base_BEFORE_CALL_1 3)) (= (select |v_old(#valid)_BEFORE_CALL_1| v_main_~a~0.base_BEFORE_CALL_1) 0) (= 2 (select |v_old(#length)_BEFORE_CALL_1| 1)) (= (select |v_old(#valid)_BEFORE_CALL_1| 2) 1) (not (= v_main_~a~0.base_BEFORE_CALL_1 1)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_1| 1) |v_old(#length)_BEFORE_CALL_1|)) (not (= v_main_~a~0.base_BEFORE_CALL_1 |#StackHeapBarrier|)) (< (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_1) 0) 0) (= (select |v_old(#length)_BEFORE_CALL_1| 2) 9) (= (select |v_old(#valid)_BEFORE_CALL_1| 0) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_1| 1) 1) 0) (not (= v_main_~a~0.base_BEFORE_CALL_1 2)))) (= ~MAX~0 100000) (not (= ~SIZE~0 100000)) (= |__VERIFIER_assert_#in~cond| 0) (< 0 ~SIZE~0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (not (= ~SIZE~0 1)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:52:07,246 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:52:07,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:52:07,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 08:52:07,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596646940] [2023-04-01 08:52:07,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:52:07,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 08:52:07,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:52:07,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 08:52:07,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-04-01 08:52:07,250 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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) [2023-04-01 08:52:07,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:52:07,285 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2023-04-01 08:52:07,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 08:52:07,285 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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 [2023-04-01 08:52:07,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:52:07,286 INFO L225 Difference]: With dead ends: 27 [2023-04-01 08:52:07,286 INFO L226 Difference]: Without dead ends: 18 [2023-04-01 08:52:07,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-04-01 08:52:07,289 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:52:07,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 29 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:52:07,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-04-01 08:52:07,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-04-01 08:52:07,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 08:52:07,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2023-04-01 08:52:07,296 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2023-04-01 08:52:07,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:52:07,296 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2023-04-01 08:52:07,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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) [2023-04-01 08:52:07,297 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2023-04-01 08:52:07,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 08:52:07,298 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:52:07,298 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:52:07,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 08:52:07,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:52:07,505 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:52:07,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:52:07,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1529729228, now seen corresponding path program 2 times [2023-04-01 08:52:07,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:52:07,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374335494] [2023-04-01 08:52:07,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:52:07,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:52:07,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:52:07,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:52:07,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:52:07,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374335494] [2023-04-01 08:52:07,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374335494] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:52:07,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749111561] [2023-04-01 08:52:07,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:52:07,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:52:07,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:52:07,945 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:52:07,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 08:52:08,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 08:52:08,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:52:08,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-01 08:52:08,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:52:08,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 08:52:08,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2023-04-01 08:52:08,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 48 [2023-04-01 08:52:08,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 08:52:08,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2023-04-01 08:52:08,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-04-01 08:52:08,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 08:52:08,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:52:08,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:52:08,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-04-01 08:52:08,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 50 [2023-04-01 08:52:08,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:52:08,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749111561] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:52:08,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1036857165] [2023-04-01 08:52:08,424 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 08:52:08,424 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:52:08,425 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:52:08,425 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:52:08,425 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:52:08,493 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2023-04-01 08:52:08,857 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 78 for LOIs [2023-04-01 08:52:08,924 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 08:52:08,931 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:52:09,864 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '360#(and (exists ((v_main_~a~0.base_BEFORE_CALL_2 Int) (|v_old(#valid)_BEFORE_CALL_2| (Array Int Int)) (|v_old(#length)_BEFORE_CALL_2| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_2| (Array Int (Array Int Int)))) (and (not (= v_main_~a~0.base_BEFORE_CALL_2 1)) (= (select |v_old(#valid)_BEFORE_CALL_2| v_main_~a~0.base_BEFORE_CALL_2) 0) (= 2 (select |v_old(#length)_BEFORE_CALL_2| 1)) (not (= v_main_~a~0.base_BEFORE_CALL_2 0)) (= (select |v_old(#length)_BEFORE_CALL_2| 3) 12) (= (select (select |v_old(#memory_int)_BEFORE_CALL_2| 1) 1) 0) (= (select |v_old(#length)_BEFORE_CALL_2| 2) 9) (= (select |v_old(#valid)_BEFORE_CALL_2| 0) 0) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_2| 1) 0)) (not (= |v_old(#length)_BEFORE_CALL_2| (select |v_old(#memory_int)_BEFORE_CALL_2| 1))) (not (= |v_old(#valid)_BEFORE_CALL_2| (select |v_old(#memory_int)_BEFORE_CALL_2| 1))) (not (= |v_old(#valid)_BEFORE_CALL_2| |v_old(#length)_BEFORE_CALL_2|)) (= (select |v_old(#valid)_BEFORE_CALL_2| 2) 1) (not (= v_main_~a~0.base_BEFORE_CALL_2 3)) (< (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_2) 0) 0) (not (= v_main_~a~0.base_BEFORE_CALL_2 |#StackHeapBarrier|)) (= (select |v_old(#valid)_BEFORE_CALL_2| 3) 1) (not (= v_main_~a~0.base_BEFORE_CALL_2 2)) (= (select |v_old(#valid)_BEFORE_CALL_2| 1) 1))) (= ~MAX~0 100000) (not (= ~SIZE~0 100000)) (= |__VERIFIER_assert_#in~cond| 0) (< 0 ~SIZE~0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (not (= ~SIZE~0 1)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:52:09,865 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:52:09,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:52:09,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-04-01 08:52:09,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169121519] [2023-04-01 08:52:09,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:52:09,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 08:52:09,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:52:09,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 08:52:09,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2023-04-01 08:52:09,867 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:52:10,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:52:10,046 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2023-04-01 08:52:10,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 08:52:10,047 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-04-01 08:52:10,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:52:10,048 INFO L225 Difference]: With dead ends: 27 [2023-04-01 08:52:10,048 INFO L226 Difference]: Without dead ends: 25 [2023-04-01 08:52:10,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 08:52:10,049 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 17 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:52:10,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 89 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:52:10,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-01 08:52:10,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2023-04-01 08:52:10,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 08:52:10,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2023-04-01 08:52:10,055 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 14 [2023-04-01 08:52:10,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:52:10,055 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2023-04-01 08:52:10,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 08:52:10,056 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2023-04-01 08:52:10,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 08:52:10,056 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:52:10,056 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:52:10,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 08:52:10,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-01 08:52:10,262 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:52:10,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:52:10,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1923393446, now seen corresponding path program 1 times [2023-04-01 08:52:10,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:52:10,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687995379] [2023-04-01 08:52:10,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:52:10,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:52:10,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:52:10,500 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:52:10,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:52:10,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687995379] [2023-04-01 08:52:10,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687995379] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:52:10,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977105468] [2023-04-01 08:52:10,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:52:10,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:52:10,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:52:10,502 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:52:10,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 08:52:10,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:52:10,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-01 08:52:10,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:52:10,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 08:52:10,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 08:52:10,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:52:10,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:52:10,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-04-01 08:52:10,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-04-01 08:52:10,812 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:52:10,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977105468] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:52:10,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [26864335] [2023-04-01 08:52:10,814 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 08:52:10,814 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:52:10,815 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:52:10,815 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:52:10,815 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:52:10,876 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2023-04-01 08:52:12,048 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 95 for LOIs [2023-04-01 08:52:12,295 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 08:52:12,302 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:52:13,640 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '599#(and (exists ((v_main_~a~0.offset_BEFORE_CALL_17 Int) (|v_old(#length)_BEFORE_CALL_15| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_15| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_15| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_17 Int) (|v_old(~SIZE~0)_BEFORE_CALL_15| Int) (v_main_~i~0_BEFORE_CALL_19 Int) (|v_main_#t~mem8_BEFORE_CALL_17| Int)) (and (< |v_main_#t~mem8_BEFORE_CALL_17| v_main_~i~0_BEFORE_CALL_19) (or (and (not (= v_main_~a~0.base_BEFORE_CALL_17 2)) (= v_main_~a~0.offset_BEFORE_CALL_17 0) (= (select |v_old(#valid)_BEFORE_CALL_15| 2) 1) (not (= v_main_~a~0.base_BEFORE_CALL_17 3)) (= (select |v_old(#valid)_BEFORE_CALL_15| v_main_~a~0.base_BEFORE_CALL_17) 0) (= ~MAX~0 100000) (= (select |v_old(#length)_BEFORE_CALL_15| 3) 12) (= |v_old(~SIZE~0)_BEFORE_CALL_15| 0) (= (select |v_old(#valid)_BEFORE_CALL_15| 0) 0) (not (= v_main_~a~0.base_BEFORE_CALL_17 |#StackHeapBarrier|)) (not (= |v_old(#valid)_BEFORE_CALL_15| |v_old(#length)_BEFORE_CALL_15|)) (not (= ~SIZE~0 100000)) (not (= v_main_~a~0.base_BEFORE_CALL_17 0)) (not (= |v_old(#valid)_BEFORE_CALL_15| (select |v_old(#memory_int)_BEFORE_CALL_15| 1))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 1) 0) 48) (not (= |#StackHeapBarrier| 0)) (not (= v_main_~a~0.base_BEFORE_CALL_17 1)) (not (= ~SIZE~0 v_main_~i~0_BEFORE_CALL_19)) (= (select |v_old(#length)_BEFORE_CALL_15| 1) 2) (= (select |v_old(#valid)_BEFORE_CALL_15| 1) 1) (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_17) (* v_main_~i~0_BEFORE_CALL_19 4)) |v_main_#t~mem8_BEFORE_CALL_17|) (not (= ~SIZE~0 1)) (= |#NULL.offset| 0) (= (select |v_old(#length)_BEFORE_CALL_15| 2) 9) (not (= |v_old(#length)_BEFORE_CALL_15| (select |v_old(#memory_int)_BEFORE_CALL_15| 1))) (= (select |v_old(#valid)_BEFORE_CALL_15| 3) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 1) 1) 0) (= |#NULL.base| 0)) (and (not (= v_main_~a~0.base_BEFORE_CALL_17 2)) (= v_main_~a~0.offset_BEFORE_CALL_17 0) (= (select |v_old(#valid)_BEFORE_CALL_15| 2) 1) (not (= v_main_~a~0.base_BEFORE_CALL_17 3)) (= (select |v_old(#valid)_BEFORE_CALL_15| v_main_~a~0.base_BEFORE_CALL_17) 0) (= ~MAX~0 100000) (= (select |v_old(#length)_BEFORE_CALL_15| 3) 12) (= v_main_~i~0_BEFORE_CALL_19 0) (= |v_old(~SIZE~0)_BEFORE_CALL_15| 0) (= (select |v_old(#valid)_BEFORE_CALL_15| 0) 0) (not (= v_main_~a~0.base_BEFORE_CALL_17 |#StackHeapBarrier|)) (not (= |v_old(#valid)_BEFORE_CALL_15| |v_old(#length)_BEFORE_CALL_15|)) (not (= ~SIZE~0 100000)) (not (= v_main_~a~0.base_BEFORE_CALL_17 0)) (not (= |v_old(#valid)_BEFORE_CALL_15| (select |v_old(#memory_int)_BEFORE_CALL_15| 1))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 1) 0) 48) (not (= |#StackHeapBarrier| 0)) (not (= v_main_~a~0.base_BEFORE_CALL_17 1)) (= (select |v_old(#length)_BEFORE_CALL_15| 1) 2) (= (select |v_old(#valid)_BEFORE_CALL_15| 1) 1) (not (= ~SIZE~0 1)) (not (= ~SIZE~0 0)) (= |#NULL.offset| 0) (= (select |v_old(#length)_BEFORE_CALL_15| 2) 9) (not (= |v_old(#length)_BEFORE_CALL_15| (select |v_old(#memory_int)_BEFORE_CALL_15| 1))) (= (select |v_old(#valid)_BEFORE_CALL_15| 3) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 1) 1) 0) (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_17) 0) |v_main_#t~mem8_BEFORE_CALL_17|) (= |#NULL.base| 0))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 08:52:13,640 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:52:13,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:52:13,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2023-04-01 08:52:13,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677749261] [2023-04-01 08:52:13,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:52:13,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 08:52:13,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:52:13,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 08:52:13,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=952, Unknown=6, NotChecked=0, Total=1056 [2023-04-01 08:52:13,642 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 6 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:52:15,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 08:52:16,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:52:16,065 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2023-04-01 08:52:16,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 08:52:16,066 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 6 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 21 [2023-04-01 08:52:16,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:52:16,067 INFO L225 Difference]: With dead ends: 54 [2023-04-01 08:52:16,068 INFO L226 Difference]: Without dead ends: 52 [2023-04-01 08:52:16,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=127, Invalid=1199, Unknown=6, NotChecked=0, Total=1332 [2023-04-01 08:52:16,069 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 18 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 11 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-01 08:52:16,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 169 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 198 Invalid, 3 Unknown, 0 Unchecked, 2.3s Time] [2023-04-01 08:52:16,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-04-01 08:52:16,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 32. [2023-04-01 08:52:16,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:52:16,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2023-04-01 08:52:16,078 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 21 [2023-04-01 08:52:16,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:52:16,079 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2023-04-01 08:52:16,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 6 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:52:16,079 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2023-04-01 08:52:16,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 08:52:16,080 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:52:16,080 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:52:16,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 08:52:16,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:52:16,297 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:52:16,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:52:16,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1910038712, now seen corresponding path program 2 times [2023-04-01 08:52:16,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:52:16,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935286048] [2023-04-01 08:52:16,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:52:16,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:52:16,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:52:16,647 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:52:16,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:52:16,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935286048] [2023-04-01 08:52:16,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935286048] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:52:16,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318419681] [2023-04-01 08:52:16,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:52:16,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:52:16,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:52:16,649 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:52:16,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 08:52:16,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 08:52:16,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:52:16,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-01 08:52:16,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:52:16,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 08:52:16,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2023-04-01 08:52:16,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 48 [2023-04-01 08:52:16,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 08:52:16,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2023-04-01 08:52:16,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-04-01 08:52:16,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 08:52:17,035 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:52:17,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:52:19,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-04-01 08:52:19,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 94 [2023-04-01 08:52:19,195 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:52:19,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318419681] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:52:19,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [952692383] [2023-04-01 08:52:19,197 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 08:52:19,197 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:52:19,197 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:52:19,198 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:52:19,198 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:52:19,238 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2023-04-01 08:52:20,227 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 95 for LOIs [2023-04-01 08:52:20,419 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 08:52:20,423 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:52:21,731 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '903#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~a~0.base_BEFORE_CALL_32 Int) (|v_old(#memory_int)_BEFORE_CALL_28| (Array Int (Array Int Int))) (|v_main_#t~mem8_BEFORE_CALL_31| Int) (|v_old(#length)_BEFORE_CALL_28| (Array Int Int)) (v_main_~a~0.offset_BEFORE_CALL_32 Int) (|v_old(#valid)_BEFORE_CALL_28| (Array Int Int)) (v_main_~i~0_BEFORE_CALL_35 Int) (|v_old(~SIZE~0)_BEFORE_CALL_28| Int)) (and (< |v_main_#t~mem8_BEFORE_CALL_31| v_main_~i~0_BEFORE_CALL_35) (or (and (not (= v_main_~a~0.base_BEFORE_CALL_32 0)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_28| 1) 0)) (= ~MAX~0 100000) (= (select |v_old(#length)_BEFORE_CALL_28| 2) 9) (not (= v_main_~a~0.base_BEFORE_CALL_32 1)) (not (= ~SIZE~0 100000)) (= (select |v_old(#valid)_BEFORE_CALL_28| 3) 1) (not (= (select |v_old(#memory_int)_BEFORE_CALL_28| 1) |v_old(#valid)_BEFORE_CALL_28|)) (= (select |v_old(#valid)_BEFORE_CALL_28| 0) 0) (not (= v_main_~a~0.base_BEFORE_CALL_32 3)) (= v_main_~a~0.offset_BEFORE_CALL_32 0) (not (= |#StackHeapBarrier| 0)) (= (select |v_old(#valid)_BEFORE_CALL_28| 1) 1) (not (= ~SIZE~0 1)) (= (select |v_old(#length)_BEFORE_CALL_28| 3) 12) (not (= v_main_~a~0.base_BEFORE_CALL_32 |#StackHeapBarrier|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_28| 1) 1) 0) (not (= |v_old(#valid)_BEFORE_CALL_28| |v_old(#length)_BEFORE_CALL_28|)) (= |#NULL.offset| 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_28| 1) |v_old(#length)_BEFORE_CALL_28|)) (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_32) (* v_main_~i~0_BEFORE_CALL_35 4)) |v_main_#t~mem8_BEFORE_CALL_31|) (not (= v_main_~a~0.base_BEFORE_CALL_32 2)) (= (select |v_old(#valid)_BEFORE_CALL_28| v_main_~a~0.base_BEFORE_CALL_32) 0) (= (select |v_old(#valid)_BEFORE_CALL_28| 2) 1) (not (= ~SIZE~0 v_main_~i~0_BEFORE_CALL_35)) (= |v_old(~SIZE~0)_BEFORE_CALL_28| 0) (= 2 (select |v_old(#length)_BEFORE_CALL_28| 1)) (= |#NULL.base| 0)) (and (not (= v_main_~a~0.base_BEFORE_CALL_32 0)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_28| 1) 0)) (= ~MAX~0 100000) (= (select |v_old(#length)_BEFORE_CALL_28| 2) 9) (not (= v_main_~a~0.base_BEFORE_CALL_32 1)) (not (= ~SIZE~0 100000)) (= (select |v_old(#valid)_BEFORE_CALL_28| 3) 1) (not (= (select |v_old(#memory_int)_BEFORE_CALL_28| 1) |v_old(#valid)_BEFORE_CALL_28|)) (= (select |v_old(#valid)_BEFORE_CALL_28| 0) 0) (not (= v_main_~a~0.base_BEFORE_CALL_32 3)) (= v_main_~a~0.offset_BEFORE_CALL_32 0) (not (= |#StackHeapBarrier| 0)) (= (select |v_old(#valid)_BEFORE_CALL_28| 1) 1) (not (= ~SIZE~0 1)) (= (select |v_old(#length)_BEFORE_CALL_28| 3) 12) (not (= v_main_~a~0.base_BEFORE_CALL_32 |#StackHeapBarrier|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_28| 1) 1) 0) (not (= ~SIZE~0 0)) (not (= |v_old(#valid)_BEFORE_CALL_28| |v_old(#length)_BEFORE_CALL_28|)) (= |#NULL.offset| 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_28| 1) |v_old(#length)_BEFORE_CALL_28|)) (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_32) 0) |v_main_#t~mem8_BEFORE_CALL_31|) (not (= v_main_~a~0.base_BEFORE_CALL_32 2)) (= (select |v_old(#valid)_BEFORE_CALL_28| v_main_~a~0.base_BEFORE_CALL_32) 0) (= (select |v_old(#valid)_BEFORE_CALL_28| 2) 1) (= v_main_~i~0_BEFORE_CALL_35 0) (= |v_old(~SIZE~0)_BEFORE_CALL_28| 0) (= 2 (select |v_old(#length)_BEFORE_CALL_28| 1)) (= |#NULL.base| 0))))))' at error location [2023-04-01 08:52:21,731 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:52:21,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:52:21,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 26 [2023-04-01 08:52:21,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037994090] [2023-04-01 08:52:21,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:52:21,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 08:52:21,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:52:21,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 08:52:21,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1354, Unknown=6, NotChecked=0, Total=1482 [2023-04-01 08:52:21,734 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 26 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 7 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:52:22,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:52:22,525 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2023-04-01 08:52:22,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 08:52:22,526 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 7 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 22 [2023-04-01 08:52:22,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:52:22,527 INFO L225 Difference]: With dead ends: 48 [2023-04-01 08:52:22,528 INFO L226 Difference]: Without dead ends: 46 [2023-04-01 08:52:22,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=194, Invalid=1962, Unknown=6, NotChecked=0, Total=2162 [2023-04-01 08:52:22,529 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 27 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 08:52:22,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 162 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 263 Invalid, 1 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 08:52:22,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-04-01 08:52:22,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2023-04-01 08:52:22,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:52:22,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2023-04-01 08:52:22,536 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 22 [2023-04-01 08:52:22,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:52:22,536 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2023-04-01 08:52:22,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 7 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:52:22,537 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2023-04-01 08:52:22,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 08:52:22,537 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:52:22,537 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:52:22,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 08:52:22,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:52:22,741 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:52:22,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:52:22,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1545524492, now seen corresponding path program 3 times [2023-04-01 08:52:22,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:52:22,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945363611] [2023-04-01 08:52:22,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:52:22,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:52:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:52:22,829 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 08:52:22,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:52:22,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945363611] [2023-04-01 08:52:22,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945363611] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:52:22,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298945738] [2023-04-01 08:52:22,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 08:52:22,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:52:22,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:52:22,831 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:52:22,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 08:52:22,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 08:52:22,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:52:22,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 08:52:22,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:52:22,971 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 08:52:22,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:52:23,016 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 08:52:23,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298945738] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:52:23,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2065271579] [2023-04-01 08:52:23,018 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 08:52:23,018 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:52:23,018 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:52:23,019 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:52:23,019 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:52:23,054 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2023-04-01 08:52:23,884 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 95 for LOIs [2023-04-01 08:52:24,035 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 08:52:24,040 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:52:25,070 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1229#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_#t~mem8_BEFORE_CALL_44| Int) (|v_old(~SIZE~0)_BEFORE_CALL_41| Int) (v_main_~i~0_BEFORE_CALL_52 Int) (v_main_~a~0.base_BEFORE_CALL_45 Int) (v_main_~a~0.offset_BEFORE_CALL_45 Int) (|v_old(#length)_BEFORE_CALL_41| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_41| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_41| (Array Int Int))) (and (< |v_main_#t~mem8_BEFORE_CALL_44| v_main_~i~0_BEFORE_CALL_52) (or (and (not (= v_main_~a~0.base_BEFORE_CALL_45 0)) (= (select |v_old(#valid)_BEFORE_CALL_41| 1) 1) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_41| 1) 0)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_41| 1) |v_old(#length)_BEFORE_CALL_41|)) (= ~MAX~0 100000) (= 2 (select |v_old(#length)_BEFORE_CALL_41| 1)) (= 12 (select |v_old(#length)_BEFORE_CALL_41| 3)) (= (select |v_old(#valid)_BEFORE_CALL_41| v_main_~a~0.base_BEFORE_CALL_45) 0) (not (= |v_old(#valid)_BEFORE_CALL_41| |v_old(#length)_BEFORE_CALL_41|)) (= (select |v_old(#valid)_BEFORE_CALL_41| 2) 1) (not (= ~SIZE~0 v_main_~i~0_BEFORE_CALL_52)) (not (= ~SIZE~0 100000)) (not (= v_main_~a~0.base_BEFORE_CALL_45 3)) (= (select |v_old(#valid)_BEFORE_CALL_41| 0) 0) (not (= |#StackHeapBarrier| 0)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_41| 1) |v_old(#valid)_BEFORE_CALL_41|)) (not (= ~SIZE~0 1)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_41| 1) 1) 0) (not (= v_main_~a~0.base_BEFORE_CALL_45 2)) (= |#NULL.offset| 0) (not (= v_main_~a~0.base_BEFORE_CALL_45 |#StackHeapBarrier|)) (not (= v_main_~a~0.base_BEFORE_CALL_45 1)) (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_45) (* v_main_~i~0_BEFORE_CALL_52 4)) |v_main_#t~mem8_BEFORE_CALL_44|) (= 9 (select |v_old(#length)_BEFORE_CALL_41| 2)) (= |v_old(~SIZE~0)_BEFORE_CALL_41| 0) (= v_main_~a~0.offset_BEFORE_CALL_45 0) (= (select |v_old(#valid)_BEFORE_CALL_41| 3) 1) (= |#NULL.base| 0)) (and (not (= v_main_~a~0.base_BEFORE_CALL_45 0)) (= (select |v_old(#valid)_BEFORE_CALL_41| 1) 1) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_41| 1) 0)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_41| 1) |v_old(#length)_BEFORE_CALL_41|)) (= ~MAX~0 100000) (= 2 (select |v_old(#length)_BEFORE_CALL_41| 1)) (= 12 (select |v_old(#length)_BEFORE_CALL_41| 3)) (= (select |v_old(#valid)_BEFORE_CALL_41| v_main_~a~0.base_BEFORE_CALL_45) 0) (not (= |v_old(#valid)_BEFORE_CALL_41| |v_old(#length)_BEFORE_CALL_41|)) (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_45) 0) |v_main_#t~mem8_BEFORE_CALL_44|) (= (select |v_old(#valid)_BEFORE_CALL_41| 2) 1) (not (= ~SIZE~0 100000)) (not (= v_main_~a~0.base_BEFORE_CALL_45 3)) (= (select |v_old(#valid)_BEFORE_CALL_41| 0) 0) (not (= |#StackHeapBarrier| 0)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_41| 1) |v_old(#valid)_BEFORE_CALL_41|)) (not (= ~SIZE~0 1)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_41| 1) 1) 0) (not (= v_main_~a~0.base_BEFORE_CALL_45 2)) (not (= ~SIZE~0 0)) (= |#NULL.offset| 0) (not (= v_main_~a~0.base_BEFORE_CALL_45 |#StackHeapBarrier|)) (= v_main_~i~0_BEFORE_CALL_52 0) (not (= v_main_~a~0.base_BEFORE_CALL_45 1)) (= 9 (select |v_old(#length)_BEFORE_CALL_41| 2)) (= |v_old(~SIZE~0)_BEFORE_CALL_41| 0) (= v_main_~a~0.offset_BEFORE_CALL_45 0) (= (select |v_old(#valid)_BEFORE_CALL_41| 3) 1) (= |#NULL.base| 0))))))' at error location [2023-04-01 08:52:25,070 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:52:25,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:52:25,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 14 [2023-04-01 08:52:25,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874573719] [2023-04-01 08:52:25,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:52:25,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 08:52:25,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:52:25,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 08:52:25,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=608, Unknown=5, NotChecked=0, Total=702 [2023-04-01 08:52:25,072 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 08:52:25,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:52:25,167 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2023-04-01 08:52:25,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 08:52:25,170 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 28 [2023-04-01 08:52:25,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:52:25,171 INFO L225 Difference]: With dead ends: 60 [2023-04-01 08:52:25,171 INFO L226 Difference]: Without dead ends: 36 [2023-04-01 08:52:25,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=108, Invalid=699, Unknown=5, NotChecked=0, Total=812 [2023-04-01 08:52:25,172 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:52:25,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 56 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:52:25,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-04-01 08:52:25,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2023-04-01 08:52:25,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 23 states have internal predecessors, (24), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:52:25,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2023-04-01 08:52:25,178 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 28 [2023-04-01 08:52:25,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:52:25,179 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2023-04-01 08:52:25,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 08:52:25,179 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2023-04-01 08:52:25,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 08:52:25,180 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:52:25,180 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:52:25,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 08:52:25,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:52:25,388 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:52:25,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:52:25,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1517893906, now seen corresponding path program 4 times [2023-04-01 08:52:25,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:52:25,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807224069] [2023-04-01 08:52:25,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:52:25,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:52:25,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:52:25,679 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 08:52:25,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:52:25,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807224069] [2023-04-01 08:52:25,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807224069] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:52:25,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986319282] [2023-04-01 08:52:25,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 08:52:25,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:52:25,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:52:25,687 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:52:25,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 08:52:25,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:52:25,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-01 08:52:25,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:52:25,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 08:52:25,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 08:52:26,010 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 08:52:26,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:52:26,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-04-01 08:52:26,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-04-01 08:52:26,145 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 08:52:26,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986319282] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:52:26,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [71195718] [2023-04-01 08:52:26,147 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 08:52:26,147 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:52:26,147 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:52:26,147 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:52:26,147 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:52:26,183 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2023-04-01 08:52:27,070 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 95 for LOIs [2023-04-01 08:52:27,271 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 08:52:27,282 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:52:28,645 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1583#(and (exists ((|v_old(#memory_int)_BEFORE_CALL_54| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_54| (Array Int Int)) (|v_old(~SIZE~0)_BEFORE_CALL_54| Int) (v_main_~a~0.offset_BEFORE_CALL_62 Int) (|v_main_#t~mem8_BEFORE_CALL_58| Int) (|v_old(#length)_BEFORE_CALL_54| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_62 Int) (v_main_~i~0_BEFORE_CALL_70 Int)) (and (< |v_main_#t~mem8_BEFORE_CALL_58| v_main_~i~0_BEFORE_CALL_70) (or (and (= v_main_~i~0_BEFORE_CALL_70 0) (not (= v_main_~a~0.base_BEFORE_CALL_62 |#StackHeapBarrier|)) (= (select |v_old(#valid)_BEFORE_CALL_54| v_main_~a~0.base_BEFORE_CALL_62) 0) (= ~MAX~0 100000) (not (= (select |v_old(#memory_int)_BEFORE_CALL_54| 1) |v_old(#length)_BEFORE_CALL_54|)) (= 12 (select |v_old(#length)_BEFORE_CALL_54| 3)) (= (select |v_old(#valid)_BEFORE_CALL_54| 2) 1) (= v_main_~a~0.offset_BEFORE_CALL_62 0) (not (= ~SIZE~0 100000)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_54| 1) 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_54| 1) 1) 0) (not (= |#StackHeapBarrier| 0)) (= (select |v_old(#length)_BEFORE_CALL_54| 2) 9) (not (= v_main_~a~0.base_BEFORE_CALL_62 0)) (not (= |v_old(#valid)_BEFORE_CALL_54| (select |v_old(#memory_int)_BEFORE_CALL_54| 1))) (= 2 (select |v_old(#length)_BEFORE_CALL_54| 1)) (not (= v_main_~a~0.base_BEFORE_CALL_62 1)) (not (= |v_old(#valid)_BEFORE_CALL_54| |v_old(#length)_BEFORE_CALL_54|)) (not (= ~SIZE~0 1)) (not (= ~SIZE~0 0)) (= |#NULL.offset| 0) (= (select |v_old(#valid)_BEFORE_CALL_54| 1) 1) (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_62) 0) |v_main_#t~mem8_BEFORE_CALL_58|) (= (select |v_old(#valid)_BEFORE_CALL_54| 0) 0) (= (select |v_old(#valid)_BEFORE_CALL_54| 3) 1) (= |#NULL.base| 0) (= |v_old(~SIZE~0)_BEFORE_CALL_54| 0) (not (= v_main_~a~0.base_BEFORE_CALL_62 3)) (not (= v_main_~a~0.base_BEFORE_CALL_62 2))) (and (not (= v_main_~a~0.base_BEFORE_CALL_62 |#StackHeapBarrier|)) (= (select |v_old(#valid)_BEFORE_CALL_54| v_main_~a~0.base_BEFORE_CALL_62) 0) (= ~MAX~0 100000) (not (= (select |v_old(#memory_int)_BEFORE_CALL_54| 1) |v_old(#length)_BEFORE_CALL_54|)) (= 12 (select |v_old(#length)_BEFORE_CALL_54| 3)) (not (= ~SIZE~0 v_main_~i~0_BEFORE_CALL_70)) (= |v_main_#t~mem8_BEFORE_CALL_58| (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_62) (* v_main_~i~0_BEFORE_CALL_70 4))) (= (select |v_old(#valid)_BEFORE_CALL_54| 2) 1) (= v_main_~a~0.offset_BEFORE_CALL_62 0) (not (= ~SIZE~0 100000)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_54| 1) 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_54| 1) 1) 0) (not (= |#StackHeapBarrier| 0)) (= (select |v_old(#length)_BEFORE_CALL_54| 2) 9) (not (= v_main_~a~0.base_BEFORE_CALL_62 0)) (not (= |v_old(#valid)_BEFORE_CALL_54| (select |v_old(#memory_int)_BEFORE_CALL_54| 1))) (= 2 (select |v_old(#length)_BEFORE_CALL_54| 1)) (not (= v_main_~a~0.base_BEFORE_CALL_62 1)) (not (= |v_old(#valid)_BEFORE_CALL_54| |v_old(#length)_BEFORE_CALL_54|)) (not (= ~SIZE~0 1)) (= |#NULL.offset| 0) (= (select |v_old(#valid)_BEFORE_CALL_54| 1) 1) (= (select |v_old(#valid)_BEFORE_CALL_54| 0) 0) (= (select |v_old(#valid)_BEFORE_CALL_54| 3) 1) (= |#NULL.base| 0) (= |v_old(~SIZE~0)_BEFORE_CALL_54| 0) (not (= v_main_~a~0.base_BEFORE_CALL_62 3)) (not (= v_main_~a~0.base_BEFORE_CALL_62 2)))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 08:52:28,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:52:28,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:52:28,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 28 [2023-04-01 08:52:28,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906342641] [2023-04-01 08:52:28,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:52:28,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-04-01 08:52:28,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:52:28,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-04-01 08:52:28,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1510, Unknown=5, NotChecked=0, Total=1640 [2023-04-01 08:52:28,648 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 28 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 10 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 08:52:31,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 08:52:32,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:52:32,564 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2023-04-01 08:52:32,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 08:52:32,564 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 10 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 29 [2023-04-01 08:52:32,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:52:32,565 INFO L225 Difference]: With dead ends: 69 [2023-04-01 08:52:32,565 INFO L226 Difference]: Without dead ends: 67 [2023-04-01 08:52:32,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=201, Invalid=2146, Unknown=5, NotChecked=0, Total=2352 [2023-04-01 08:52:32,567 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 18 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-04-01 08:52:32,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 236 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 359 Invalid, 4 Unknown, 0 Unchecked, 3.7s Time] [2023-04-01 08:52:32,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-04-01 08:52:32,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 40. [2023-04-01 08:52:32,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 08:52:32,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2023-04-01 08:52:32,577 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 29 [2023-04-01 08:52:32,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:52:32,577 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2023-04-01 08:52:32,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 10 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 08:52:32,577 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2023-04-01 08:52:32,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 08:52:32,578 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:52:32,578 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:52:32,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 08:52:32,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:52:32,784 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:52:32,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:52:32,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1994583732, now seen corresponding path program 5 times [2023-04-01 08:52:32,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:52:32,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714021055] [2023-04-01 08:52:32,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:52:32,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:52:32,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:52:33,166 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 08:52:33,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:52:33,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714021055] [2023-04-01 08:52:33,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714021055] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:52:33,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332597838] [2023-04-01 08:52:33,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:52:33,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:52:33,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:52:33,168 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:52:33,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 08:52:33,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 08:52:33,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:52:33,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 30 conjunts are in the unsatisfiable core [2023-04-01 08:52:33,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:52:33,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 08:52:33,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2023-04-01 08:52:33,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 48 [2023-04-01 08:52:33,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 08:52:33,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2023-04-01 08:52:33,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-04-01 08:52:33,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 08:52:33,602 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 08:52:33,603 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:52:33,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2023-04-01 08:52:33,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-04-01 08:52:33,707 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 08:52:33,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332597838] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:52:33,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [432998046] [2023-04-01 08:52:33,709 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 08:52:33,709 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:52:33,709 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:52:33,709 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:52:33,709 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:52:33,744 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2023-04-01 08:52:34,599 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 95 for LOIs [2023-04-01 08:52:34,802 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 08:52:34,807 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:52:36,093 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1977#(and (exists ((|v_old(#memory_int)_BEFORE_CALL_67| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_67| (Array Int Int)) (|v_main_#t~mem8_BEFORE_CALL_72| Int) (v_main_~a~0.offset_BEFORE_CALL_79 Int) (v_main_~a~0.base_BEFORE_CALL_79 Int) (|v_old(~SIZE~0)_BEFORE_CALL_67| Int) (v_main_~i~0_BEFORE_CALL_88 Int) (|v_old(#length)_BEFORE_CALL_67| (Array Int Int))) (and (< |v_main_#t~mem8_BEFORE_CALL_72| v_main_~i~0_BEFORE_CALL_88) (or (and (= (select |v_old(#length)_BEFORE_CALL_67| 1) 2) (= (select |v_old(#valid)_BEFORE_CALL_67| 3) 1) (not (= v_main_~a~0.base_BEFORE_CALL_79 1)) (not (= ~SIZE~0 v_main_~i~0_BEFORE_CALL_88)) (= ~MAX~0 100000) (= (select |v_old(#valid)_BEFORE_CALL_67| 0) 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_67| 1) |v_old(#length)_BEFORE_CALL_67|)) (not (= v_main_~a~0.base_BEFORE_CALL_79 |#StackHeapBarrier|)) (= (select |v_old(#length)_BEFORE_CALL_67| 2) 9) (= (select |v_old(#valid)_BEFORE_CALL_67| v_main_~a~0.base_BEFORE_CALL_79) 0) (= v_main_~a~0.offset_BEFORE_CALL_79 0) (not (= v_main_~a~0.base_BEFORE_CALL_79 0)) (= (select |v_old(#valid)_BEFORE_CALL_67| 1) 1) (= (select |v_old(#valid)_BEFORE_CALL_67| 2) 1) (not (= ~SIZE~0 100000)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_67| 1) 0) 48) (= (select (select |v_old(#memory_int)_BEFORE_CALL_67| 1) 1) 0) (not (= |v_old(#valid)_BEFORE_CALL_67| |v_old(#length)_BEFORE_CALL_67|)) (not (= |#StackHeapBarrier| 0)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_67| 1) |v_old(#valid)_BEFORE_CALL_67|)) (not (= v_main_~a~0.base_BEFORE_CALL_79 2)) (= (select |v_old(#length)_BEFORE_CALL_67| 3) 12) (not (= ~SIZE~0 1)) (not (= v_main_~a~0.base_BEFORE_CALL_79 3)) (= |#NULL.offset| 0) (= |v_old(~SIZE~0)_BEFORE_CALL_67| 0) (= |#NULL.base| 0) (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_79) (* v_main_~i~0_BEFORE_CALL_88 4)) |v_main_#t~mem8_BEFORE_CALL_72|)) (and (= (select |v_old(#length)_BEFORE_CALL_67| 1) 2) (= (select |v_old(#valid)_BEFORE_CALL_67| 3) 1) (not (= v_main_~a~0.base_BEFORE_CALL_79 1)) (= v_main_~i~0_BEFORE_CALL_88 0) (= ~MAX~0 100000) (= (select |v_old(#valid)_BEFORE_CALL_67| 0) 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_67| 1) |v_old(#length)_BEFORE_CALL_67|)) (not (= v_main_~a~0.base_BEFORE_CALL_79 |#StackHeapBarrier|)) (= (select |v_old(#length)_BEFORE_CALL_67| 2) 9) (= (select |v_old(#valid)_BEFORE_CALL_67| v_main_~a~0.base_BEFORE_CALL_79) 0) (= v_main_~a~0.offset_BEFORE_CALL_79 0) (not (= v_main_~a~0.base_BEFORE_CALL_79 0)) (= (select |v_old(#valid)_BEFORE_CALL_67| 1) 1) (= (select |v_old(#valid)_BEFORE_CALL_67| 2) 1) (not (= ~SIZE~0 100000)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_67| 1) 0) 48) (= (select (select |v_old(#memory_int)_BEFORE_CALL_67| 1) 1) 0) (not (= |v_old(#valid)_BEFORE_CALL_67| |v_old(#length)_BEFORE_CALL_67|)) (not (= |#StackHeapBarrier| 0)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_67| 1) |v_old(#valid)_BEFORE_CALL_67|)) (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_79) 0) |v_main_#t~mem8_BEFORE_CALL_72|) (not (= v_main_~a~0.base_BEFORE_CALL_79 2)) (= (select |v_old(#length)_BEFORE_CALL_67| 3) 12) (not (= ~SIZE~0 1)) (not (= v_main_~a~0.base_BEFORE_CALL_79 3)) (not (= ~SIZE~0 0)) (= |#NULL.offset| 0) (= |v_old(~SIZE~0)_BEFORE_CALL_67| 0) (= |#NULL.base| 0))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 08:52:36,093 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:52:36,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:52:36,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 26 [2023-04-01 08:52:36,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72330913] [2023-04-01 08:52:36,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:52:36,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 08:52:36,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:52:36,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 08:52:36,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1353, Unknown=5, NotChecked=0, Total=1482 [2023-04-01 08:52:36,095 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 26 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 8 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 08:52:37,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:52:37,471 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2023-04-01 08:52:37,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 08:52:37,472 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 8 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 30 [2023-04-01 08:52:37,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:52:37,473 INFO L225 Difference]: With dead ends: 59 [2023-04-01 08:52:37,473 INFO L226 Difference]: Without dead ends: 57 [2023-04-01 08:52:37,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 57 SyntacticMatches, 8 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=159, Invalid=1728, Unknown=5, NotChecked=0, Total=1892 [2023-04-01 08:52:37,475 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 17 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-01 08:52:37,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 189 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 392 Invalid, 2 Unknown, 0 Unchecked, 1.3s Time] [2023-04-01 08:52:37,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-04-01 08:52:37,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2023-04-01 08:52:37,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 34 states have (on average 1.088235294117647) internal successors, (37), 36 states have internal predecessors, (37), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 08:52:37,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2023-04-01 08:52:37,486 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 30 [2023-04-01 08:52:37,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:52:37,486 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2023-04-01 08:52:37,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 8 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 08:52:37,486 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2023-04-01 08:52:37,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 08:52:37,490 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:52:37,490 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:52:37,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 08:52:37,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:52:37,696 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:52:37,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:52:37,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1660315656, now seen corresponding path program 6 times [2023-04-01 08:52:37,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:52:37,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480123701] [2023-04-01 08:52:37,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:52:37,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:52:37,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:52:37,802 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 08:52:37,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:52:37,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480123701] [2023-04-01 08:52:37,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480123701] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:52:37,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699082941] [2023-04-01 08:52:37,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 08:52:37,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:52:37,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:52:37,804 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:52:37,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 08:52:37,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 08:52:37,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:52:37,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 08:52:37,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:52:37,990 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 08:52:37,991 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:52:38,052 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 08:52:38,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699082941] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:52:38,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1464566126] [2023-04-01 08:52:38,055 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 08:52:38,056 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:52:38,056 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:52:38,056 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:52:38,056 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:52:38,096 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2023-04-01 08:52:38,956 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 95 for LOIs [2023-04-01 08:52:39,150 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 08:52:39,154 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:52:40,210 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2393#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~i~0_BEFORE_CALL_107 Int) (|v_old(#length)_BEFORE_CALL_80| (Array Int Int)) (|v_main_#t~mem8_BEFORE_CALL_85| Int) (|v_old(#memory_int)_BEFORE_CALL_80| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_80| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_92 Int) (v_main_~a~0.offset_BEFORE_CALL_92 Int) (|v_old(~SIZE~0)_BEFORE_CALL_80| Int)) (and (< |v_main_#t~mem8_BEFORE_CALL_85| v_main_~i~0_BEFORE_CALL_107) (or (and (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_92) 0) |v_main_#t~mem8_BEFORE_CALL_85|) (not (= v_main_~a~0.base_BEFORE_CALL_92 1)) (= ~MAX~0 100000) (= |v_old(~SIZE~0)_BEFORE_CALL_80| 0) (= (select |v_old(#valid)_BEFORE_CALL_80| 0) 0) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_80| 1) 0)) (not (= |v_old(#valid)_BEFORE_CALL_80| |v_old(#length)_BEFORE_CALL_80|)) (not (= ~SIZE~0 100000)) (not (= v_main_~a~0.base_BEFORE_CALL_92 |#StackHeapBarrier|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_80| 1) 1) 0) (not (= v_main_~a~0.base_BEFORE_CALL_92 3)) (= v_main_~a~0.offset_BEFORE_CALL_92 0) (not (= |#StackHeapBarrier| 0)) (= (select |v_old(#valid)_BEFORE_CALL_80| 3) 1) (= v_main_~i~0_BEFORE_CALL_107 0) (= 2 (select |v_old(#length)_BEFORE_CALL_80| 1)) (= (select |v_old(#valid)_BEFORE_CALL_80| v_main_~a~0.base_BEFORE_CALL_92) 0) (= 9 (select |v_old(#length)_BEFORE_CALL_80| 2)) (= (select |v_old(#length)_BEFORE_CALL_80| 3) 12) (not (= ~SIZE~0 1)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_80| 1) |v_old(#length)_BEFORE_CALL_80|)) (not (= ~SIZE~0 0)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_80| 1) |v_old(#valid)_BEFORE_CALL_80|)) (= (select |v_old(#valid)_BEFORE_CALL_80| 1) 1) (= |#NULL.offset| 0) (= (select |v_old(#valid)_BEFORE_CALL_80| 2) 1) (not (= v_main_~a~0.base_BEFORE_CALL_92 2)) (not (= v_main_~a~0.base_BEFORE_CALL_92 0)) (= |#NULL.base| 0)) (and (not (= v_main_~a~0.base_BEFORE_CALL_92 1)) (not (= ~SIZE~0 v_main_~i~0_BEFORE_CALL_107)) (= ~MAX~0 100000) (= |v_old(~SIZE~0)_BEFORE_CALL_80| 0) (= (select |v_old(#valid)_BEFORE_CALL_80| 0) 0) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_80| 1) 0)) (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_92) (* v_main_~i~0_BEFORE_CALL_107 4)) |v_main_#t~mem8_BEFORE_CALL_85|) (not (= |v_old(#valid)_BEFORE_CALL_80| |v_old(#length)_BEFORE_CALL_80|)) (not (= ~SIZE~0 100000)) (not (= v_main_~a~0.base_BEFORE_CALL_92 |#StackHeapBarrier|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_80| 1) 1) 0) (not (= v_main_~a~0.base_BEFORE_CALL_92 3)) (= v_main_~a~0.offset_BEFORE_CALL_92 0) (not (= |#StackHeapBarrier| 0)) (= (select |v_old(#valid)_BEFORE_CALL_80| 3) 1) (= 2 (select |v_old(#length)_BEFORE_CALL_80| 1)) (= (select |v_old(#valid)_BEFORE_CALL_80| v_main_~a~0.base_BEFORE_CALL_92) 0) (= 9 (select |v_old(#length)_BEFORE_CALL_80| 2)) (= (select |v_old(#length)_BEFORE_CALL_80| 3) 12) (not (= ~SIZE~0 1)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_80| 1) |v_old(#length)_BEFORE_CALL_80|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_80| 1) |v_old(#valid)_BEFORE_CALL_80|)) (= (select |v_old(#valid)_BEFORE_CALL_80| 1) 1) (= |#NULL.offset| 0) (= (select |v_old(#valid)_BEFORE_CALL_80| 2) 1) (not (= v_main_~a~0.base_BEFORE_CALL_92 2)) (not (= v_main_~a~0.base_BEFORE_CALL_92 0)) (= |#NULL.base| 0))))))' at error location [2023-04-01 08:52:40,210 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:52:40,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:52:40,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 17 [2023-04-01 08:52:40,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214154868] [2023-04-01 08:52:40,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:52:40,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 08:52:40,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:52:40,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 08:52:40,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=754, Unknown=5, NotChecked=0, Total=870 [2023-04-01 08:52:40,212 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 9 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 08:52:40,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:52:40,341 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2023-04-01 08:52:40,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 08:52:40,342 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 9 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 36 [2023-04-01 08:52:40,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:52:40,342 INFO L225 Difference]: With dead ends: 75 [2023-04-01 08:52:40,342 INFO L226 Difference]: Without dead ends: 44 [2023-04-01 08:52:40,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 83 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=144, Invalid=907, Unknown=5, NotChecked=0, Total=1056 [2023-04-01 08:52:40,344 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 10 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:52:40,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 66 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:52:40,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-04-01 08:52:40,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2023-04-01 08:52:40,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 08:52:40,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2023-04-01 08:52:40,352 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 36 [2023-04-01 08:52:40,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:52:40,352 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2023-04-01 08:52:40,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 9 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 08:52:40,352 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2023-04-01 08:52:40,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-01 08:52:40,353 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:52:40,353 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:52:40,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 08:52:40,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-04-01 08:52:40,559 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:52:40,559 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:52:40,559 INFO L85 PathProgramCache]: Analyzing trace with hash 530937894, now seen corresponding path program 7 times [2023-04-01 08:52:40,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:52:40,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083832337] [2023-04-01 08:52:40,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:52:40,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:52:40,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:52:40,937 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 08:52:40,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:52:40,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083832337] [2023-04-01 08:52:40,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083832337] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:52:40,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461923308] [2023-04-01 08:52:40,938 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 08:52:40,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:52:40,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:52:40,939 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:52:40,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 08:52:40,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:52:41,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 28 conjunts are in the unsatisfiable core [2023-04-01 08:52:41,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:52:41,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 08:52:41,185 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 08:52:41,187 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:52:41,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-04-01 08:52:41,236 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 08:52:41,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:52:41,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-04-01 08:52:41,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-04-01 08:52:41,406 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 08:52:41,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461923308] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:52:41,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1063642973] [2023-04-01 08:52:41,408 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 08:52:41,408 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:52:41,408 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:52:41,408 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:52:41,408 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:52:41,451 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2023-04-01 08:52:42,299 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 95 for LOIs [2023-04-01 08:52:42,442 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 08:52:42,446 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:52:43,678 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2830#(and (exists ((v_main_~a~0.offset_BEFORE_CALL_111 Int) (|v_old(~SIZE~0)_BEFORE_CALL_93| Int) (|v_main_#t~mem8_BEFORE_CALL_99| Int) (v_main_~i~0_BEFORE_CALL_127 Int) (v_main_~a~0.base_BEFORE_CALL_111 Int) (|v_old(#memory_int)_BEFORE_CALL_93| (Array Int (Array Int Int))) (|v_old(#length)_BEFORE_CALL_93| (Array Int Int)) (|v_old(#valid)_BEFORE_CALL_93| (Array Int Int))) (and (< |v_main_#t~mem8_BEFORE_CALL_99| v_main_~i~0_BEFORE_CALL_127) (or (and (= (select |v_old(#valid)_BEFORE_CALL_93| 2) 1) (= (select |v_old(#valid)_BEFORE_CALL_93| 1) 1) (= 2 (select |v_old(#length)_BEFORE_CALL_93| 1)) (= (select |v_old(#length)_BEFORE_CALL_93| 3) 12) (= ~MAX~0 100000) (not (= v_main_~a~0.base_BEFORE_CALL_111 |#StackHeapBarrier|)) (not (= |v_old(#valid)_BEFORE_CALL_93| |v_old(#length)_BEFORE_CALL_93|)) (not (= v_main_~a~0.base_BEFORE_CALL_111 0)) (= (select |v_old(#valid)_BEFORE_CALL_93| 3) 1) (= 9 (select |v_old(#length)_BEFORE_CALL_93| 2)) (not (= ~SIZE~0 100000)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_93| 1) 1) 0) (= |v_old(~SIZE~0)_BEFORE_CALL_93| 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_93| 1) 0) 48) (not (= (select |v_old(#memory_int)_BEFORE_CALL_93| 1) |v_old(#length)_BEFORE_CALL_93|)) (not (= |#StackHeapBarrier| 0)) (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_111) (* v_main_~i~0_BEFORE_CALL_127 4)) |v_main_#t~mem8_BEFORE_CALL_99|) (not (= |v_old(#valid)_BEFORE_CALL_93| (select |v_old(#memory_int)_BEFORE_CALL_93| 1))) (not (= ~SIZE~0 1)) (not (= ~SIZE~0 v_main_~i~0_BEFORE_CALL_127)) (= |#NULL.offset| 0) (not (= v_main_~a~0.base_BEFORE_CALL_111 3)) (not (= v_main_~a~0.base_BEFORE_CALL_111 1)) (= v_main_~a~0.offset_BEFORE_CALL_111 0) (= (select |v_old(#valid)_BEFORE_CALL_93| v_main_~a~0.base_BEFORE_CALL_111) 0) (= 0 (select |v_old(#valid)_BEFORE_CALL_93| 0)) (not (= v_main_~a~0.base_BEFORE_CALL_111 2)) (= |#NULL.base| 0)) (and (= (select |v_old(#valid)_BEFORE_CALL_93| 2) 1) (= (select |v_old(#valid)_BEFORE_CALL_93| 1) 1) (= 2 (select |v_old(#length)_BEFORE_CALL_93| 1)) (= (select |v_old(#length)_BEFORE_CALL_93| 3) 12) (= v_main_~i~0_BEFORE_CALL_127 0) (= ~MAX~0 100000) (not (= v_main_~a~0.base_BEFORE_CALL_111 |#StackHeapBarrier|)) (not (= |v_old(#valid)_BEFORE_CALL_93| |v_old(#length)_BEFORE_CALL_93|)) (not (= v_main_~a~0.base_BEFORE_CALL_111 0)) (= (select |v_old(#valid)_BEFORE_CALL_93| 3) 1) (= 9 (select |v_old(#length)_BEFORE_CALL_93| 2)) (not (= ~SIZE~0 100000)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_93| 1) 1) 0) (= |v_old(~SIZE~0)_BEFORE_CALL_93| 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_93| 1) 0) 48) (not (= (select |v_old(#memory_int)_BEFORE_CALL_93| 1) |v_old(#length)_BEFORE_CALL_93|)) (not (= |#StackHeapBarrier| 0)) (not (= |v_old(#valid)_BEFORE_CALL_93| (select |v_old(#memory_int)_BEFORE_CALL_93| 1))) (not (= ~SIZE~0 1)) (not (= ~SIZE~0 0)) (= |#NULL.offset| 0) (not (= v_main_~a~0.base_BEFORE_CALL_111 3)) (not (= v_main_~a~0.base_BEFORE_CALL_111 1)) (= v_main_~a~0.offset_BEFORE_CALL_111 0) (= (select |v_old(#valid)_BEFORE_CALL_93| v_main_~a~0.base_BEFORE_CALL_111) 0) (= 0 (select |v_old(#valid)_BEFORE_CALL_93| 0)) (not (= v_main_~a~0.base_BEFORE_CALL_111 2)) (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_111) 0) |v_main_#t~mem8_BEFORE_CALL_99|) (= |#NULL.base| 0))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 08:52:43,678 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:52:43,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:52:43,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 27 [2023-04-01 08:52:43,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808109456] [2023-04-01 08:52:43,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:52:43,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-04-01 08:52:43,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:52:43,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-04-01 08:52:43,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1431, Unknown=7, NotChecked=0, Total=1560 [2023-04-01 08:52:43,681 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 27 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 9 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2023-04-01 08:52:47,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:52:47,838 INFO L93 Difference]: Finished difference Result 84 states and 87 transitions. [2023-04-01 08:52:47,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 08:52:47,838 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 9 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 37 [2023-04-01 08:52:47,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:52:47,839 INFO L225 Difference]: With dead ends: 84 [2023-04-01 08:52:47,839 INFO L226 Difference]: Without dead ends: 82 [2023-04-01 08:52:47,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 76 SyntacticMatches, 10 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=151, Invalid=1734, Unknown=7, NotChecked=0, Total=1892 [2023-04-01 08:52:47,840 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 20 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 11 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:52:47,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 238 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 462 Invalid, 5 Unknown, 0 Unchecked, 4.1s Time] [2023-04-01 08:52:47,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-04-01 08:52:47,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 48. [2023-04-01 08:52:47,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 08:52:47,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2023-04-01 08:52:47,851 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 37 [2023-04-01 08:52:47,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:52:47,851 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2023-04-01 08:52:47,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 9 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2023-04-01 08:52:47,852 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2023-04-01 08:52:47,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 08:52:47,852 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:52:47,852 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:52:47,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 08:52:48,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 08:52:48,057 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:52:48,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:52:48,057 INFO L85 PathProgramCache]: Analyzing trace with hash -120034360, now seen corresponding path program 8 times [2023-04-01 08:52:48,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:52:48,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518878974] [2023-04-01 08:52:48,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:52:48,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:52:48,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:52:48,544 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 08:52:48,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:52:48,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518878974] [2023-04-01 08:52:48,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518878974] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:52:48,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414364192] [2023-04-01 08:52:48,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:52:48,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:52:48,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:52:48,546 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:52:48,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 08:52:48,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-01 08:52:48,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:52:48,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 32 conjunts are in the unsatisfiable core [2023-04-01 08:52:48,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:52:48,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-04-01 08:52:48,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 16 [2023-04-01 08:52:48,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 52 [2023-04-01 08:52:48,757 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-04-01 08:52:48,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2023-04-01 08:52:48,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-04-01 08:52:48,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-04-01 08:52:55,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-04-01 08:52:55,394 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 08:52:55,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:52:59,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-04-01 08:52:59,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-04-01 08:52:59,593 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 08:52:59,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414364192] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:52:59,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [535628054] [2023-04-01 08:52:59,594 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 08:52:59,595 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:52:59,595 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:52:59,595 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:52:59,595 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:52:59,628 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2023-04-01 08:53:00,441 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 95 for LOIs [2023-04-01 08:53:00,631 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 08:53:00,635 INFO L180 IcfgInterpreter]: Interpretation finished