/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/array-crafted/zero_sum_const4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 02:52:26,930 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 02:52:26,932 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 02:52:26,953 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 02:52:26,954 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 02:52:26,955 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 02:52:26,956 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 02:52:26,957 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 02:52:26,958 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 02:52:26,959 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 02:52:26,960 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 02:52:26,961 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 02:52:26,961 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 02:52:26,962 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 02:52:26,962 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 02:52:26,963 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 02:52:26,964 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 02:52:26,965 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 02:52:26,966 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 02:52:26,967 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 02:52:26,969 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 02:52:26,973 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 02:52:26,974 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 02:52:26,975 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 02:52:26,978 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 02:52:26,978 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 02:52:26,979 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 02:52:26,979 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 02:52:26,980 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 02:52:26,981 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 02:52:26,981 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 02:52:26,982 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 02:52:26,982 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 02:52:26,983 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 02:52:26,984 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 02:52:26,984 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 02:52:26,991 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 02:52:26,992 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 02:52:26,992 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 02:52:26,995 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 02:52:26,996 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 02:52:26,997 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 02:52:27,030 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 02:52:27,030 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 02:52:27,031 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 02:52:27,031 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 02:52:27,032 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 02:52:27,032 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 02:52:27,032 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 02:52:27,032 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 02:52:27,032 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 02:52:27,033 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 02:52:27,033 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 02:52:27,033 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 02:52:27,034 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 02:52:27,034 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 02:52:27,034 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 02:52:27,034 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 02:52:27,034 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 02:52:27,034 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 02:52:27,035 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 02:52:27,035 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 02:52:27,035 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 02:52:27,035 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 02:52:27,036 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 02:52:27,036 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 02:52:27,036 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 02:52:27,036 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 02:52:27,036 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 02:52:27,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 02:52:27,037 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 02:52:27,037 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 02:52:27,037 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 02:52:27,037 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 02:52:27,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:52:27,037 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 02:52:27,038 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 02:52:27,038 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 02:52:27,038 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 02:52:27,038 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 02:52:27,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 02:52:27,038 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 02:52:27,039 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 02:52:27,039 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 02:52:27,287 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 02:52:27,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 02:52:27,320 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 02:52:27,322 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 02:52:27,322 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 02:52:27,323 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_const4.c [2023-04-01 02:52:28,510 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 02:52:28,679 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 02:52:28,679 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const4.c [2023-04-01 02:52:28,685 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2109e624/1122afbbb9e54dc9bfaa7c8701ff85ed/FLAGc5f912750 [2023-04-01 02:52:28,699 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2109e624/1122afbbb9e54dc9bfaa7c8701ff85ed [2023-04-01 02:52:28,704 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 02:52:28,706 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 02:52:28,709 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 02:52:28,709 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 02:52:28,712 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 02:52:28,713 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:52:28" (1/1) ... [2023-04-01 02:52:28,714 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3726b268 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:52:28, skipping insertion in model container [2023-04-01 02:52:28,715 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:52:28" (1/1) ... [2023-04-01 02:52:28,721 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 02:52:28,738 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 02:52:28,879 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-crafted/zero_sum_const4.c[406,419] [2023-04-01 02:52:28,906 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:52:28,917 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 02:52:28,926 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-crafted/zero_sum_const4.c[406,419] [2023-04-01 02:52:28,935 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:52:28,947 INFO L208 MainTranslator]: Completed translation [2023-04-01 02:52:28,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:52:28 WrapperNode [2023-04-01 02:52:28,948 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 02:52:28,949 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 02:52:28,949 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 02:52:28,949 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 02:52:28,959 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:52:28" (1/1) ... [2023-04-01 02:52:28,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:52:28" (1/1) ... [2023-04-01 02:52:28,966 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:52:28" (1/1) ... [2023-04-01 02:52:28,966 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:52:28" (1/1) ... [2023-04-01 02:52:28,972 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:52:28" (1/1) ... [2023-04-01 02:52:28,977 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:52:28" (1/1) ... [2023-04-01 02:52:28,979 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:52:28" (1/1) ... [2023-04-01 02:52:28,980 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:52:28" (1/1) ... [2023-04-01 02:52:28,982 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 02:52:28,982 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 02:52:28,983 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 02:52:28,983 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 02:52:28,983 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:52:28" (1/1) ... [2023-04-01 02:52:28,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:52:28,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:52:29,010 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 02:52:29,014 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 02:52:29,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 02:52:29,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 02:52:29,044 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 02:52:29,046 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 02:52:29,046 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 02:52:29,046 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 02:52:29,046 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 02:52:29,046 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 02:52:29,046 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 02:52:29,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 02:52:29,047 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 02:52:29,047 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 02:52:29,047 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2023-04-01 02:52:29,047 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 02:52:29,048 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 02:52:29,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 02:52:29,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 02:52:29,048 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 02:52:29,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 02:52:29,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 02:52:29,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 02:52:29,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 02:52:29,125 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 02:52:29,126 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 02:52:29,336 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 02:52:29,418 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 02:52:29,418 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-04-01 02:52:29,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:52:29 BoogieIcfgContainer [2023-04-01 02:52:29,421 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 02:52:29,423 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 02:52:29,423 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 02:52:29,426 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 02:52:29,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 02:52:28" (1/3) ... [2023-04-01 02:52:29,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40877ffd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:52:29, skipping insertion in model container [2023-04-01 02:52:29,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:52:28" (2/3) ... [2023-04-01 02:52:29,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40877ffd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:52:29, skipping insertion in model container [2023-04-01 02:52:29,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:52:29" (3/3) ... [2023-04-01 02:52:29,428 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum_const4.c [2023-04-01 02:52:29,441 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 02:52:29,442 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 02:52:29,496 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 02:52:29,503 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;@1620732b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 02:52:29,504 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 02:52:29,508 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 20 states have internal predecessors, (30), 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 02:52:29,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 02:52:29,515 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:52:29,515 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:52:29,516 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:52:29,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:52:29,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1796638137, now seen corresponding path program 1 times [2023-04-01 02:52:29,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:52:29,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040687901] [2023-04-01 02:52:29,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:52:29,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:52:29,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:52:29,862 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 02:52:29,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:52:29,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040687901] [2023-04-01 02:52:29,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040687901] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:52:29,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:52:29,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 02:52:29,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029862171] [2023-04-01 02:52:29,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:52:29,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 02:52:29,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:52:29,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 02:52:29,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 02:52:29,925 INFO L87 Difference]: Start difference. First operand has 26 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 20 states have internal predecessors, (30), 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 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:52:30,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:52:30,017 INFO L93 Difference]: Finished difference Result 46 states and 66 transitions. [2023-04-01 02:52:30,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 02:52:30,020 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-04-01 02:52:30,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:52:30,031 INFO L225 Difference]: With dead ends: 46 [2023-04-01 02:52:30,032 INFO L226 Difference]: Without dead ends: 21 [2023-04-01 02:52:30,034 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 02:52:30,038 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:52:30,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:52:30,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-01 02:52:30,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-01 02:52:30,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 3 states have call successors, (3), 3 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 02:52:30,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 29 transitions. [2023-04-01 02:52:30,065 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 29 transitions. Word has length 19 [2023-04-01 02:52:30,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:52:30,066 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 29 transitions. [2023-04-01 02:52:30,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:52:30,066 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 29 transitions. [2023-04-01 02:52:30,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 02:52:30,067 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:52:30,067 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:52:30,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 02:52:30,067 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:52:30,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:52:30,068 INFO L85 PathProgramCache]: Analyzing trace with hash 704696988, now seen corresponding path program 1 times [2023-04-01 02:52:30,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:52:30,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073584611] [2023-04-01 02:52:30,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:52:30,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:52:30,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:52:30,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 02:52:30,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:52:30,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073584611] [2023-04-01 02:52:30,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073584611] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:52:30,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:52:30,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 02:52:30,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273695771] [2023-04-01 02:52:30,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:52:30,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 02:52:30,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:52:30,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 02:52:30,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 02:52:30,210 INFO L87 Difference]: Start difference. First operand 21 states and 29 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 02:52:30,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:52:30,296 INFO L93 Difference]: Finished difference Result 41 states and 63 transitions. [2023-04-01 02:52:30,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 02:52:30,298 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-04-01 02:52:30,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:52:30,299 INFO L225 Difference]: With dead ends: 41 [2023-04-01 02:52:30,299 INFO L226 Difference]: Without dead ends: 29 [2023-04-01 02:52:30,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 02:52:30,300 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 28 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:52:30,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 15 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:52:30,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-01 02:52:30,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-04-01 02:52:30,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 3 states have call successors, (3), 3 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 02:52:30,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2023-04-01 02:52:30,308 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 20 [2023-04-01 02:52:30,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:52:30,308 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2023-04-01 02:52:30,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 02:52:30,309 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2023-04-01 02:52:30,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 02:52:30,310 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:52:30,310 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:52:30,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 02:52:30,310 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:52:30,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:52:30,311 INFO L85 PathProgramCache]: Analyzing trace with hash -602317462, now seen corresponding path program 1 times [2023-04-01 02:52:30,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:52:30,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192341272] [2023-04-01 02:52:30,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:52:30,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:52:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:52:30,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 02:52:30,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:52:30,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192341272] [2023-04-01 02:52:30,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192341272] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:52:30,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608955571] [2023-04-01 02:52:30,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:52:30,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:52:30,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:52:30,463 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 02:52:30,466 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 02:52:30,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:52:30,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 02:52:30,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:52:30,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 02:52:30,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:52:30,693 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 02:52:30,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608955571] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:52:30,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1115109738] [2023-04-01 02:52:30,720 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-01 02:52:30,720 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:52:30,723 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:52:30,727 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:52:30,727 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:52:30,846 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-01 02:52:31,381 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-04-01 02:52:31,392 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:52:31,400 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:52:31,791 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '444#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (<= 2 ~SIZE~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:52:31,791 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:52:31,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:52:31,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 02:52:31,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67475111] [2023-04-01 02:52:31,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:52:31,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 02:52:31,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:52:31,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 02:52:31,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-04-01 02:52:31,794 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 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 02:52:31,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:52:31,864 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2023-04-01 02:52:31,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 02:52:31,865 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 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 28 [2023-04-01 02:52:31,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:52:31,867 INFO L225 Difference]: With dead ends: 51 [2023-04-01 02:52:31,867 INFO L226 Difference]: Without dead ends: 30 [2023-04-01 02:52:31,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-04-01 02:52:31,871 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:52:31,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:52:31,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-01 02:52:31,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-04-01 02:52:31,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 3 states have call successors, (3), 3 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 02:52:31,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2023-04-01 02:52:31,882 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 28 [2023-04-01 02:52:31,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:52:31,882 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2023-04-01 02:52:31,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 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 02:52:31,882 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2023-04-01 02:52:31,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 02:52:31,883 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:52:31,883 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:52:31,893 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 02:52:32,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:52:32,089 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:52:32,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:52:32,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1814533301, now seen corresponding path program 2 times [2023-04-01 02:52:32,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:52:32,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159096376] [2023-04-01 02:52:32,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:52:32,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:52:32,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:52:32,240 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 02:52:32,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:52:32,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159096376] [2023-04-01 02:52:32,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159096376] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:52:32,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585236790] [2023-04-01 02:52:32,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:52:32,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:52:32,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:52:32,247 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 02:52:32,249 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 02:52:32,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 02:52:32,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:52:32,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 02:52:32,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:52:32,370 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 02:52:32,370 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:52:32,414 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 02:52:32,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585236790] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:52:32,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1348438459] [2023-04-01 02:52:32,416 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-01 02:52:32,417 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:52:32,417 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:52:32,417 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:52:32,417 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:52:32,453 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-01 02:52:32,808 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-04-01 02:52:32,818 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:52:32,824 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:52:33,211 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '783#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (<= 2 ~SIZE~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:52:33,211 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:52:33,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:52:33,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-04-01 02:52:33,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277119918] [2023-04-01 02:52:33,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:52:33,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 02:52:33,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:52:33,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 02:52:33,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-04-01 02:52:33,213 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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 02:52:33,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:52:33,290 INFO L93 Difference]: Finished difference Result 57 states and 79 transitions. [2023-04-01 02:52:33,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 02:52:33,290 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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 29 [2023-04-01 02:52:33,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:52:33,291 INFO L225 Difference]: With dead ends: 57 [2023-04-01 02:52:33,291 INFO L226 Difference]: Without dead ends: 38 [2023-04-01 02:52:33,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-04-01 02:52:33,292 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:52:33,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 18 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:52:33,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-04-01 02:52:33,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-04-01 02:52:33,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 3 states have call successors, (3), 3 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 02:52:33,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2023-04-01 02:52:33,298 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 29 [2023-04-01 02:52:33,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:52:33,298 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2023-04-01 02:52:33,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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 02:52:33,299 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2023-04-01 02:52:33,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-01 02:52:33,299 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:52:33,300 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:52:33,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 02:52:33,510 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,SelfDestructingSolverStorable3 [2023-04-01 02:52:33,511 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:52:33,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:52:33,511 INFO L85 PathProgramCache]: Analyzing trace with hash -965997529, now seen corresponding path program 3 times [2023-04-01 02:52:33,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:52:33,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637587280] [2023-04-01 02:52:33,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:52:33,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:52:33,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:52:35,775 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:52:35,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:52:35,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637587280] [2023-04-01 02:52:35,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637587280] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:52:35,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091839180] [2023-04-01 02:52:35,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:52:35,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:52:35,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:52:35,777 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 02:52:35,780 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 02:52:35,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:52:35,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:52:35,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 82 conjunts are in the unsatisfiable core [2023-04-01 02:52:35,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:52:36,180 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 02:52:36,181 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:52:36,559 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:52:36,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-04-01 02:52:36,740 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:52:36,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091839180] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:52:36,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [247893152] [2023-04-01 02:52:36,743 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-01 02:52:36,743 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:52:36,743 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:52:36,743 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:52:36,743 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:52:36,787 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-01 02:52:37,067 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-04-01 02:52:37,074 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:52:37,079 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:52:37,701 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1223#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (<= 2 ~SIZE~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:52:37,702 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:52:37,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:52:37,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 15] total 33 [2023-04-01 02:52:37,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847882093] [2023-04-01 02:52:37,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:52:37,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-01 02:52:37,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:52:37,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-01 02:52:37,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1722, Unknown=0, NotChecked=0, Total=1892 [2023-04-01 02:52:37,705 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 33 states, 33 states have (on average 2.696969696969697) internal successors, (89), 31 states have internal predecessors, (89), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:52:38,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:52:38,560 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2023-04-01 02:52:38,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 02:52:38,561 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.696969696969697) internal successors, (89), 31 states have internal predecessors, (89), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2023-04-01 02:52:38,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:52:38,562 INFO L225 Difference]: With dead ends: 65 [2023-04-01 02:52:38,562 INFO L226 Difference]: Without dead ends: 60 [2023-04-01 02:52:38,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 91 SyntacticMatches, 8 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=278, Invalid=2692, Unknown=0, NotChecked=0, Total=2970 [2023-04-01 02:52:38,564 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 4 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 02:52:38,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 95 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 02:52:38,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-04-01 02:52:38,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2023-04-01 02:52:38,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 53 states have internal predecessors, (69), 3 states have call successors, (3), 3 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 02:52:38,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2023-04-01 02:52:38,575 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 37 [2023-04-01 02:52:38,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:52:38,575 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2023-04-01 02:52:38,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.696969696969697) internal successors, (89), 31 states have internal predecessors, (89), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:52:38,575 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2023-04-01 02:52:38,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 02:52:38,576 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:52:38,576 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:52:38,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 02:52:38,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:52:38,782 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:52:38,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:52:38,783 INFO L85 PathProgramCache]: Analyzing trace with hash -897760163, now seen corresponding path program 4 times [2023-04-01 02:52:38,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:52:38,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198080156] [2023-04-01 02:52:38,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:52:38,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:52:38,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:52:38,880 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 02:52:38,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:52:38,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198080156] [2023-04-01 02:52:38,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198080156] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:52:38,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589119652] [2023-04-01 02:52:38,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 02:52:38,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:52:38,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:52:38,882 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 02:52:38,885 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 02:52:38,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:52:38,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 02:52:38,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:52:39,019 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 02:52:39,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:52:39,061 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 02:52:39,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589119652] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:52:39,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [534639329] [2023-04-01 02:52:39,063 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-01 02:52:39,063 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:52:39,064 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:52:39,065 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:52:39,065 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:52:39,093 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-01 02:52:39,336 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-04-01 02:52:39,342 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:52:39,347 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:52:39,686 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1728#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (<= 2 ~SIZE~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:52:39,686 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:52:39,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:52:39,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-04-01 02:52:39,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242343688] [2023-04-01 02:52:39,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:52:39,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 02:52:39,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:52:39,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 02:52:39,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2023-04-01 02:52:39,688 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 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 02:52:39,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:52:39,913 INFO L93 Difference]: Finished difference Result 122 states and 158 transitions. [2023-04-01 02:52:39,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 02:52:39,913 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 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 38 [2023-04-01 02:52:39,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:52:39,914 INFO L225 Difference]: With dead ends: 122 [2023-04-01 02:52:39,915 INFO L226 Difference]: Without dead ends: 71 [2023-04-01 02:52:39,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 94 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2023-04-01 02:52:39,916 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 10 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 02:52:39,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 45 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 02:52:39,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-04-01 02:52:39,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2023-04-01 02:52:39,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 59 states have internal predecessors, (74), 3 states have call successors, (3), 3 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 02:52:39,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2023-04-01 02:52:39,926 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 38 [2023-04-01 02:52:39,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:52:39,927 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2023-04-01 02:52:39,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 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 02:52:39,927 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2023-04-01 02:52:39,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-01 02:52:39,928 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:52:39,928 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:52:39,934 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 02:52:40,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:52:40,134 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:52:40,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:52:40,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1508296859, now seen corresponding path program 5 times [2023-04-01 02:52:40,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:52:40,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517010786] [2023-04-01 02:52:40,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:52:40,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:52:40,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:52:40,237 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 02:52:40,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:52:40,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517010786] [2023-04-01 02:52:40,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517010786] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:52:40,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996632569] [2023-04-01 02:52:40,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:52:40,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:52:40,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:52:40,239 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 02:52:40,241 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 02:52:40,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 02:52:40,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:52:40,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 02:52:40,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:52:40,390 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 02:52:40,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:52:40,472 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 02:52:40,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996632569] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:52:40,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1813207926] [2023-04-01 02:52:40,476 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-01 02:52:40,476 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:52:40,477 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:52:40,477 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:52:40,477 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:52:40,498 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-01 02:52:40,740 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-04-01 02:52:40,746 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:52:40,749 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:52:41,099 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2346#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (<= 2 ~SIZE~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:52:41,100 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:52:41,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:52:41,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-04-01 02:52:41,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013104932] [2023-04-01 02:52:41,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:52:41,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 02:52:41,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:52:41,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 02:52:41,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2023-04-01 02:52:41,101 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 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 02:52:41,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:52:41,304 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2023-04-01 02:52:41,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 02:52:41,305 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 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 39 [2023-04-01 02:52:41,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:52:41,306 INFO L225 Difference]: With dead ends: 70 [2023-04-01 02:52:41,306 INFO L226 Difference]: Without dead ends: 47 [2023-04-01 02:52:41,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 96 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2023-04-01 02:52:41,307 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 9 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:52:41,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 32 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:52:41,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-04-01 02:52:41,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-04-01 02:52:41,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 states have internal predecessors, (51), 3 states have call successors, (3), 3 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 02:52:41,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2023-04-01 02:52:41,316 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 39 [2023-04-01 02:52:41,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:52:41,316 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2023-04-01 02:52:41,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 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 02:52:41,316 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2023-04-01 02:52:41,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-01 02:52:41,317 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:52:41,317 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:52:41,333 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 02:52:41,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:52:41,525 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:52:41,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:52:41,526 INFO L85 PathProgramCache]: Analyzing trace with hash 977326858, now seen corresponding path program 6 times [2023-04-01 02:52:41,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:52:41,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950152923] [2023-04-01 02:52:41,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:52:41,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:52:41,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:52:45,860 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:52:45,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:52:45,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950152923] [2023-04-01 02:52:45,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950152923] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:52:45,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976645608] [2023-04-01 02:52:45,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:52:45,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:52:45,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:52:45,862 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 02:52:45,865 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 02:52:45,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:52:45,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:52:45,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 114 conjunts are in the unsatisfiable core [2023-04-01 02:52:45,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:52:46,607 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 48 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 02:52:46,607 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:52:47,377 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:52:47,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 89 [2023-04-01 02:52:47,698 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 02:52:47,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976645608] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:52:47,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [498880832] [2023-04-01 02:52:47,700 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-01 02:52:47,700 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:52:47,701 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:52:47,701 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:52:47,701 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:52:47,722 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-01 02:52:47,925 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-04-01 02:52:47,930 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:52:47,934 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:52:48,681 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2921#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (<= 2 ~SIZE~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:52:48,681 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:52:48,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:52:48,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 15, 18] total 60 [2023-04-01 02:52:48,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928493310] [2023-04-01 02:52:48,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:52:48,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-04-01 02:52:48,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:52:48,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-04-01 02:52:48,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=4672, Unknown=0, NotChecked=0, Total=4970 [2023-04-01 02:52:48,685 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 60 states, 60 states have (on average 1.9166666666666667) internal successors, (115), 58 states have internal predecessors, (115), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:52:54,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:52:54,282 INFO L93 Difference]: Finished difference Result 161 states and 205 transitions. [2023-04-01 02:52:54,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-04-01 02:52:54,284 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.9166666666666667) internal successors, (115), 58 states have internal predecessors, (115), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2023-04-01 02:52:54,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:52:54,285 INFO L225 Difference]: With dead ends: 161 [2023-04-01 02:52:54,285 INFO L226 Difference]: Without dead ends: 121 [2023-04-01 02:52:54,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1268, Invalid=11842, Unknown=0, NotChecked=0, Total=13110 [2023-04-01 02:52:54,289 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 174 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 2780 mSolverCounterSat, 924 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 3704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 924 IncrementalHoareTripleChecker+Valid, 2780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 02:52:54,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 179 Invalid, 3704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [924 Valid, 2780 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 02:52:54,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-04-01 02:52:54,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 79. [2023-04-01 02:52:54,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.2432432432432432) internal successors, (92), 74 states have internal predecessors, (92), 3 states have call successors, (3), 3 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 02:52:54,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2023-04-01 02:52:54,316 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 46 [2023-04-01 02:52:54,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:52:54,316 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2023-04-01 02:52:54,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.9166666666666667) internal successors, (115), 58 states have internal predecessors, (115), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:52:54,316 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2023-04-01 02:52:54,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-01 02:52:54,317 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:52:54,317 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:52:54,327 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 02:52:54,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:52:54,523 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:52:54,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:52:54,524 INFO L85 PathProgramCache]: Analyzing trace with hash -194903786, now seen corresponding path program 7 times [2023-04-01 02:52:54,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:52:54,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967377349] [2023-04-01 02:52:54,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:52:54,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:52:54,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:52:54,722 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-04-01 02:52:54,723 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:52:54,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967377349] [2023-04-01 02:52:54,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967377349] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:52:54,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750254571] [2023-04-01 02:52:54,724 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 02:52:54,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:52:54,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:52:54,726 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 02:52:54,728 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 02:52:54,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:52:54,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 02:52:54,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:52:54,907 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-04-01 02:52:54,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:52:54,982 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-04-01 02:52:54,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750254571] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:52:54,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2036758057] [2023-04-01 02:52:54,984 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-01 02:52:54,984 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:52:54,984 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:52:54,984 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:52:54,985 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:52:55,012 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-01 02:52:55,218 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-04-01 02:52:55,225 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:52:55,229 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:52:55,548 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3781#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (<= 2 ~SIZE~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:52:55,549 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:52:55,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:52:55,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-04-01 02:52:55,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673447973] [2023-04-01 02:52:55,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:52:55,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 02:52:55,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:52:55,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 02:52:55,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2023-04-01 02:52:55,551 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 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 02:52:55,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:52:55,792 INFO L93 Difference]: Finished difference Result 149 states and 183 transitions. [2023-04-01 02:52:55,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 02:52:55,792 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 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 47 [2023-04-01 02:52:55,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:52:55,793 INFO L225 Difference]: With dead ends: 149 [2023-04-01 02:52:55,793 INFO L226 Difference]: Without dead ends: 56 [2023-04-01 02:52:55,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 118 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2023-04-01 02:52:55,794 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 02:52:55,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 49 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 02:52:55,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-04-01 02:52:55,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-04-01 02:52:55,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 3 states have call successors, (3), 3 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 02:52:55,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2023-04-01 02:52:55,815 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 47 [2023-04-01 02:52:55,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:52:55,816 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2023-04-01 02:52:55,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 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 02:52:55,816 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2023-04-01 02:52:55,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-01 02:52:55,817 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:52:55,817 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:52:55,822 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 02:52:56,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:52:56,020 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:52:56,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:52:56,021 INFO L85 PathProgramCache]: Analyzing trace with hash -97524217, now seen corresponding path program 8 times [2023-04-01 02:52:56,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:52:56,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66170955] [2023-04-01 02:52:56,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:52:56,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:52:56,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:53:00,908 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 3 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:53:00,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:53:00,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66170955] [2023-04-01 02:53:00,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66170955] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:53:00,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348547539] [2023-04-01 02:53:00,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:53:00,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:53:00,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:53:00,910 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 02:53:00,911 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 02:53:00,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 02:53:00,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:53:00,998 WARN L260 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 151 conjunts are in the unsatisfiable core [2023-04-01 02:53:01,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:53:01,055 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 02:53:04,253 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:53:04,253 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 14 [2023-04-01 02:53:04,390 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 4 proven. 80 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 02:53:04,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:53:07,909 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 02:53:07,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348547539] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:53:07,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [269145873] [2023-04-01 02:53:07,911 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-01 02:53:07,911 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:53:07,911 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:53:07,911 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:53:07,911 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:53:07,931 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-01 02:53:08,101 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-04-01 02:53:08,106 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:53:08,110 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:53:08,857 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4587#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (<= 2 ~SIZE~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:53:08,857 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:53:08,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:53:08,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 18, 15] total 65 [2023-04-01 02:53:08,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949497298] [2023-04-01 02:53:08,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:53:08,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-04-01 02:53:08,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:53:08,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-04-01 02:53:08,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=5402, Unknown=1, NotChecked=0, Total=5700 [2023-04-01 02:53:08,860 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 65 states, 65 states have (on average 2.169230769230769) internal successors, (141), 63 states have internal predecessors, (141), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:53:19,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:53:19,798 INFO L93 Difference]: Finished difference Result 202 states and 241 transitions. [2023-04-01 02:53:19,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-04-01 02:53:19,799 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.169230769230769) internal successors, (141), 63 states have internal predecessors, (141), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2023-04-01 02:53:19,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:53:19,800 INFO L225 Difference]: With dead ends: 202 [2023-04-01 02:53:19,800 INFO L226 Difference]: Without dead ends: 93 [2023-04-01 02:53:19,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 119 SyntacticMatches, 21 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5034 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=1197, Invalid=14804, Unknown=1, NotChecked=0, Total=16002 [2023-04-01 02:53:19,804 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 65 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 3685 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 4233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 3685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-04-01 02:53:19,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 178 Invalid, 4233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 3685 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-04-01 02:53:19,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-04-01 02:53:19,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2023-04-01 02:53:19,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 84 states have internal predecessors, (100), 3 states have call successors, (3), 3 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 02:53:19,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 104 transitions. [2023-04-01 02:53:19,836 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 104 transitions. Word has length 55 [2023-04-01 02:53:19,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:53:19,836 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 104 transitions. [2023-04-01 02:53:19,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.169230769230769) internal successors, (141), 63 states have internal predecessors, (141), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:53:19,836 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 104 transitions. [2023-04-01 02:53:19,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-01 02:53:19,837 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:53:19,837 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:53:19,845 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 02:53:20,044 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,SelfDestructingSolverStorable9 [2023-04-01 02:53:20,045 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:53:20,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:53:20,045 INFO L85 PathProgramCache]: Analyzing trace with hash 931412360, now seen corresponding path program 9 times [2023-04-01 02:53:20,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:53:20,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469432129] [2023-04-01 02:53:20,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:53:20,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:53:20,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:53:20,215 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-04-01 02:53:20,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:53:20,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469432129] [2023-04-01 02:53:20,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469432129] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:53:20,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524973614] [2023-04-01 02:53:20,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:53:20,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:53:20,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:53:20,217 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 02:53:20,226 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 02:53:20,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:53:20,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:53:20,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 02:53:20,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:53:20,443 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-04-01 02:53:20,443 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:53:20,586 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-04-01 02:53:20,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524973614] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:53:20,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1898076451] [2023-04-01 02:53:20,588 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-01 02:53:20,588 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:53:20,588 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:53:20,588 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:53:20,588 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:53:20,609 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-01 02:53:20,818 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-04-01 02:53:20,825 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:53:20,829 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:53:21,233 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5637#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (<= 2 ~SIZE~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:53:21,233 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:53:21,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:53:21,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2023-04-01 02:53:21,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548257854] [2023-04-01 02:53:21,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:53:21,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-04-01 02:53:21,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:53:21,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-04-01 02:53:21,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1377, Unknown=0, NotChecked=0, Total=1560 [2023-04-01 02:53:21,235 INFO L87 Difference]: Start difference. First operand 89 states and 104 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 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 02:53:21,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:53:21,677 INFO L93 Difference]: Finished difference Result 132 states and 160 transitions. [2023-04-01 02:53:21,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 02:53:21,677 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 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 57 [2023-04-01 02:53:21,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:53:21,678 INFO L225 Difference]: With dead ends: 132 [2023-04-01 02:53:21,678 INFO L226 Difference]: Without dead ends: 65 [2023-04-01 02:53:21,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 140 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=290, Invalid=2260, Unknown=0, NotChecked=0, Total=2550 [2023-04-01 02:53:21,680 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 63 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 02:53:21,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 90 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 02:53:21,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-04-01 02:53:21,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-04-01 02:53:21,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.15) internal successors, (69), 60 states have internal predecessors, (69), 3 states have call successors, (3), 3 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 02:53:21,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2023-04-01 02:53:21,707 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 57 [2023-04-01 02:53:21,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:53:21,707 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2023-04-01 02:53:21,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 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 02:53:21,707 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2023-04-01 02:53:21,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-01 02:53:21,708 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:53:21,708 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:53:21,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0