/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/array-patterns/array7_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 20:56:00,103 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 20:56:00,104 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 20:56:00,136 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 20:56:00,136 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 20:56:00,138 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 20:56:00,139 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 20:56:00,141 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 20:56:00,142 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 20:56:00,146 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 20:56:00,147 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 20:56:00,148 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 20:56:00,148 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 20:56:00,150 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 20:56:00,151 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 20:56:00,152 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 20:56:00,152 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 20:56:00,153 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 20:56:00,154 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 20:56:00,158 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 20:56:00,159 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 20:56:00,159 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 20:56:00,160 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 20:56:00,161 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 20:56:00,167 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 20:56:00,167 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 20:56:00,168 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 20:56:00,169 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 20:56:00,169 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 20:56:00,169 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 20:56:00,170 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 20:56:00,170 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 20:56:00,171 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 20:56:00,171 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 20:56:00,172 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 20:56:00,172 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 20:56:00,172 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 20:56:00,172 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 20:56:00,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 20:56:00,173 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 20:56:00,173 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 20:56:00,174 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 20:56:00,197 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 20:56:00,197 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 20:56:00,197 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 20:56:00,197 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 20:56:00,198 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 20:56:00,199 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 20:56:00,199 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 20:56:00,199 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 20:56:00,199 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 20:56:00,199 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 20:56:00,199 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 20:56:00,200 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 20:56:00,200 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 20:56:00,200 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 20:56:00,200 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 20:56:00,200 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 20:56:00,200 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 20:56:00,200 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 20:56:00,200 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 20:56:00,201 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 20:56:00,201 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 20:56:00,201 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 20:56:00,201 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 20:56:00,201 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 20:56:00,201 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 20:56:00,201 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 20:56:00,201 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 20:56:00,201 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 20:56:00,201 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 20:56:00,202 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 20:56:00,202 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 20:56:00,202 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 20:56:00,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:56:00,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 20:56:00,202 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 20:56:00,202 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 20:56:00,202 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 20:56:00,202 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 20:56:00,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 20:56:00,202 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 20:56:00,203 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 20:56:00,203 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 20:56:00,392 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 20:56:00,408 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 20:56:00,409 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 20:56:00,410 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 20:56:00,411 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 20:56:00,412 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array7_pattern.c [2023-03-31 20:56:01,522 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 20:56:01,680 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 20:56:01,680 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array7_pattern.c [2023-03-31 20:56:01,685 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00e04f3aa/9851f17db9604d3f90d5d97fe8af2665/FLAG22a2ea256 [2023-03-31 20:56:01,701 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00e04f3aa/9851f17db9604d3f90d5d97fe8af2665 [2023-03-31 20:56:01,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 20:56:01,705 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 20:56:01,708 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 20:56:01,708 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 20:56:01,711 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 20:56:01,711 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:56:01" (1/1) ... [2023-03-31 20:56:01,713 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bd059aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:56:01, skipping insertion in model container [2023-03-31 20:56:01,713 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:56:01" (1/1) ... [2023-03-31 20:56:01,719 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 20:56:01,733 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 20:56:01,858 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-patterns/array7_pattern.c[1375,1388] [2023-03-31 20:56:01,879 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:56:01,886 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 20:56:01,895 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-patterns/array7_pattern.c[1375,1388] [2023-03-31 20:56:01,910 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:56:01,920 INFO L208 MainTranslator]: Completed translation [2023-03-31 20:56:01,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:56:01 WrapperNode [2023-03-31 20:56:01,921 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 20:56:01,921 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 20:56:01,921 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 20:56:01,921 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 20:56:01,931 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:56:01" (1/1) ... [2023-03-31 20:56:01,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:56:01" (1/1) ... [2023-03-31 20:56:01,941 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:56:01" (1/1) ... [2023-03-31 20:56:01,941 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:56:01" (1/1) ... [2023-03-31 20:56:01,948 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:56:01" (1/1) ... [2023-03-31 20:56:01,951 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:56:01" (1/1) ... [2023-03-31 20:56:01,952 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:56:01" (1/1) ... [2023-03-31 20:56:01,953 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:56:01" (1/1) ... [2023-03-31 20:56:01,954 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 20:56:01,954 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 20:56:01,955 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 20:56:01,955 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 20:56:01,955 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:56:01" (1/1) ... [2023-03-31 20:56:01,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:56:01,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:56:01,982 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 20:56:02,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 20:56:02,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 20:56:02,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 20:56:02,033 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 20:56:02,033 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 20:56:02,033 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 20:56:02,033 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 20:56:02,033 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 20:56:02,034 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 20:56:02,034 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 20:56:02,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 20:56:02,034 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 20:56:02,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 20:56:02,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 20:56:02,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2023-03-31 20:56:02,034 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 20:56:02,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 20:56:02,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 20:56:02,034 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 20:56:02,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 20:56:02,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 20:56:02,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 20:56:02,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 20:56:02,097 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 20:56:02,099 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 20:56:02,260 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 20:56:02,278 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 20:56:02,278 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-03-31 20:56:02,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:56:02 BoogieIcfgContainer [2023-03-31 20:56:02,280 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 20:56:02,282 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 20:56:02,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 20:56:02,284 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 20:56:02,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 08:56:01" (1/3) ... [2023-03-31 20:56:02,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56bf2a97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:56:02, skipping insertion in model container [2023-03-31 20:56:02,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:56:01" (2/3) ... [2023-03-31 20:56:02,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56bf2a97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:56:02, skipping insertion in model container [2023-03-31 20:56:02,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:56:02" (3/3) ... [2023-03-31 20:56:02,286 INFO L112 eAbstractionObserver]: Analyzing ICFG array7_pattern.c [2023-03-31 20:56:02,317 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 20:56:02,318 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 20:56:02,372 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 20:56:02,388 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;@3dc6b2fa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 20:56:02,389 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 20:56:02,392 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 20:56:02,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-03-31 20:56:02,396 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:56:02,397 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:56:02,397 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:56:02,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:56:02,401 INFO L85 PathProgramCache]: Analyzing trace with hash -619700838, now seen corresponding path program 1 times [2023-03-31 20:56:02,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:56:02,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55615509] [2023-03-31 20:56:02,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:56:02,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:56:02,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:56:02,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:56:02,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:56:02,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55615509] [2023-03-31 20:56:02,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55615509] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:56:02,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:56:02,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-03-31 20:56:02,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081804980] [2023-03-31 20:56:02,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:56:02,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-03-31 20:56:02,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:56:02,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-03-31 20:56:02,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 20:56:02,586 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 20:56:02,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:56:02,625 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2023-03-31 20:56:02,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-03-31 20:56:02,629 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-03-31 20:56:02,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:56:02,633 INFO L225 Difference]: With dead ends: 41 [2023-03-31 20:56:02,633 INFO L226 Difference]: Without dead ends: 22 [2023-03-31 20:56:02,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 20:56:02,638 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:56:02,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:56:02,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-03-31 20:56:02,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-03-31 20:56:02,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:56:02,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-03-31 20:56:02,663 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 17 [2023-03-31 20:56:02,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:56:02,664 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-03-31 20:56:02,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 20:56:02,664 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-03-31 20:56:02,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-03-31 20:56:02,665 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:56:02,665 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:56:02,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 20:56:02,666 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:56:02,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:56:02,666 INFO L85 PathProgramCache]: Analyzing trace with hash -343050430, now seen corresponding path program 1 times [2023-03-31 20:56:02,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:56:02,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858039411] [2023-03-31 20:56:02,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:56:02,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:56:02,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:56:02,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 20:56:02,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:56:02,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858039411] [2023-03-31 20:56:02,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858039411] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:56:02,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:56:02,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 20:56:02,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631706451] [2023-03-31 20:56:02,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:56:02,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 20:56:02,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:56:02,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 20:56:02,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 20:56:02,882 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:56:02,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:56:02,931 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2023-03-31 20:56:02,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 20:56:02,931 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2023-03-31 20:56:02,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:56:02,933 INFO L225 Difference]: With dead ends: 28 [2023-03-31 20:56:02,933 INFO L226 Difference]: Without dead ends: 23 [2023-03-31 20:56:02,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-31 20:56:02,938 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:56:02,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 64 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:56:02,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-03-31 20:56:02,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-03-31 20:56:02,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:56:02,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-03-31 20:56:02,948 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 25 [2023-03-31 20:56:02,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:56:02,948 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-03-31 20:56:02,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:56:02,949 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-03-31 20:56:02,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-31 20:56:02,949 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:56:02,949 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:56:02,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 20:56:02,950 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:56:02,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:56:02,950 INFO L85 PathProgramCache]: Analyzing trace with hash -2118006844, now seen corresponding path program 1 times [2023-03-31 20:56:02,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:56:02,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766461268] [2023-03-31 20:56:02,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:56:02,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:56:02,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:56:03,102 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 20:56:03,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:56:03,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766461268] [2023-03-31 20:56:03,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766461268] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:56:03,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:56:03,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 20:56:03,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767241622] [2023-03-31 20:56:03,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:56:03,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 20:56:03,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:56:03,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 20:56:03,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 20:56:03,104 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:56:03,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:56:03,151 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2023-03-31 20:56:03,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 20:56:03,152 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2023-03-31 20:56:03,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:56:03,154 INFO L225 Difference]: With dead ends: 39 [2023-03-31 20:56:03,154 INFO L226 Difference]: Without dead ends: 24 [2023-03-31 20:56:03,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 20:56:03,155 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 13 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:56:03,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 52 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:56:03,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-03-31 20:56:03,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-03-31 20:56:03,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:56:03,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-03-31 20:56:03,162 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 26 [2023-03-31 20:56:03,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:56:03,162 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-03-31 20:56:03,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 20:56:03,162 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-03-31 20:56:03,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-03-31 20:56:03,163 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:56:03,163 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:56:03,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 20:56:03,163 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:56:03,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:56:03,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1334765166, now seen corresponding path program 1 times [2023-03-31 20:56:03,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:56:03,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514953445] [2023-03-31 20:56:03,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:56:03,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:56:03,192 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:56:03,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200801032] [2023-03-31 20:56:03,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:56:03,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:56:03,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:56:03,205 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:56:03,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 20:56:03,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:56:03,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2023-03-31 20:56:03,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:56:03,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 20:56:03,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:56:03,562 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 20:56:03,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:56:03,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514953445] [2023-03-31 20:56:03,562 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 20:56:03,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200801032] [2023-03-31 20:56:03,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200801032] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:56:03,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [694641271] [2023-03-31 20:56:03,582 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-03-31 20:56:03,582 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:56:03,585 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:56:03,588 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:56:03,589 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:56:03,667 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-03-31 20:56:04,414 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2023-03-31 20:56:04,421 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2023-03-31 20:56:04,425 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 20:56:04,430 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:56:31,683 WARN L223 SmtUtils]: Spent 26.15s on a formula simplification. DAG size of input: 176 DAG size of output: 89 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-03-31 20:57:18,355 WARN L223 SmtUtils]: Spent 33.67s on a formula simplification. DAG size of input: 173 DAG size of output: 86 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-03-31 20:57:19,606 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '490#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= 0 ~ARR_SIZE~0) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:57:19,606 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:57:19,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 20:57:19,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2023-03-31 20:57:19,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263010336] [2023-03-31 20:57:19,607 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 20:57:19,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-31 20:57:19,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:57:19,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-31 20:57:19,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=859, Unknown=4, NotChecked=0, Total=992 [2023-03-31 20:57:19,609 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 12 states, 7 states have (on average 3.142857142857143) internal successors, (22), 10 states have internal predecessors, (22), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-03-31 20:57:20,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:57:20,622 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2023-03-31 20:57:20,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-03-31 20:57:20,626 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 7 states have (on average 3.142857142857143) internal successors, (22), 10 states have internal predecessors, (22), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 27 [2023-03-31 20:57:20,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:57:20,626 INFO L225 Difference]: With dead ends: 63 [2023-03-31 20:57:20,626 INFO L226 Difference]: Without dead ends: 38 [2023-03-31 20:57:20,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 75.7s TimeCoverageRelationStatistics Valid=163, Invalid=1165, Unknown=4, NotChecked=0, Total=1332 [2023-03-31 20:57:20,629 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 18 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 20:57:20,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 88 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 20:57:20,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-03-31 20:57:20,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2023-03-31 20:57:20,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:57:20,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-03-31 20:57:20,642 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 27 [2023-03-31 20:57:20,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:57:20,642 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-03-31 20:57:20,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 7 states have (on average 3.142857142857143) internal successors, (22), 10 states have internal predecessors, (22), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-03-31 20:57:20,642 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-03-31 20:57:20,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-03-31 20:57:20,643 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:57:20,646 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:57:20,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 20:57:20,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:57:20,847 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:57:20,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:57:20,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1748101166, now seen corresponding path program 2 times [2023-03-31 20:57:20,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:57:20,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245218271] [2023-03-31 20:57:20,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:57:20,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:57:20,868 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 20:57:20,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1193331199] [2023-03-31 20:57:20,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:57:20,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:57:20,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:57:20,873 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:57:20,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process