/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-patterns/array12_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 15:04:07,064 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 15:04:07,066 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 15:04:07,090 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 15:04:07,091 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 15:04:07,092 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 15:04:07,093 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 15:04:07,098 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 15:04:07,099 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 15:04:07,100 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 15:04:07,100 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 15:04:07,101 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 15:04:07,102 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 15:04:07,102 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 15:04:07,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 15:04:07,104 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 15:04:07,105 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 15:04:07,105 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 15:04:07,107 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 15:04:07,108 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 15:04:07,109 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 15:04:07,116 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 15:04:07,118 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 15:04:07,119 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 15:04:07,123 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 15:04:07,124 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 15:04:07,124 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 15:04:07,124 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 15:04:07,124 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 15:04:07,125 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 15:04:07,125 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 15:04:07,126 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 15:04:07,126 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 15:04:07,127 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 15:04:07,128 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 15:04:07,128 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 15:04:07,129 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 15:04:07,129 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 15:04:07,129 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 15:04:07,130 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 15:04:07,130 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 15:04:07,133 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 15:04:07,159 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 15:04:07,159 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 15:04:07,159 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 15:04:07,160 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 15:04:07,160 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 15:04:07,160 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 15:04:07,160 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 15:04:07,160 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 15:04:07,161 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 15:04:07,161 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 15:04:07,161 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 15:04:07,161 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 15:04:07,161 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 15:04:07,161 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 15:04:07,161 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 15:04:07,161 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 15:04:07,161 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 15:04:07,162 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 15:04:07,162 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 15:04:07,162 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 15:04:07,162 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 15:04:07,162 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 15:04:07,162 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 15:04:07,163 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 15:04:07,163 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 15:04:07,163 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 15:04:07,163 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 15:04:07,163 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 15:04:07,163 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 15:04:07,163 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 15:04:07,163 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 15:04:07,163 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 15:04:07,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 15:04:07,164 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 15:04:07,164 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 15:04:07,164 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 15:04:07,164 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 15:04:07,164 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 15:04:07,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 15:04:07,164 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 15:04:07,165 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 15:04:07,165 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 15:04:07,384 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 15:04:07,409 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 15:04:07,411 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 15:04:07,412 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 15:04:07,413 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 15:04:07,414 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array12_pattern.c [2023-04-02 15:04:08,577 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 15:04:08,752 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 15:04:08,753 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array12_pattern.c [2023-04-02 15:04:08,757 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d32dd05e3/b969efc6d45c4982bb5a71b39cbca310/FLAG339a433b9 [2023-04-02 15:04:08,767 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d32dd05e3/b969efc6d45c4982bb5a71b39cbca310 [2023-04-02 15:04:08,769 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 15:04:08,770 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 15:04:08,771 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 15:04:08,771 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 15:04:08,774 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 15:04:08,775 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 03:04:08" (1/1) ... [2023-04-02 15:04:08,776 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1656daa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:04:08, skipping insertion in model container [2023-04-02 15:04:08,776 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 03:04:08" (1/1) ... [2023-04-02 15:04:08,781 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 15:04:08,793 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 15:04:08,908 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/array12_pattern.c[1349,1362] [2023-04-02 15:04:08,924 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 15:04:08,932 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 15:04:08,941 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/array12_pattern.c[1349,1362] [2023-04-02 15:04:08,949 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 15:04:08,960 INFO L208 MainTranslator]: Completed translation [2023-04-02 15:04:08,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:04:08 WrapperNode [2023-04-02 15:04:08,960 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 15:04:08,961 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 15:04:08,961 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 15:04:08,961 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 15:04:08,971 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:04:08" (1/1) ... [2023-04-02 15:04:08,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:04:08" (1/1) ... [2023-04-02 15:04:08,976 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:04:08" (1/1) ... [2023-04-02 15:04:08,976 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:04:08" (1/1) ... [2023-04-02 15:04:08,982 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:04:08" (1/1) ... [2023-04-02 15:04:08,985 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:04:08" (1/1) ... [2023-04-02 15:04:08,986 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:04:08" (1/1) ... [2023-04-02 15:04:08,987 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:04:08" (1/1) ... [2023-04-02 15:04:08,988 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 15:04:08,989 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 15:04:08,989 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 15:04:08,989 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 15:04:08,990 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:04:08" (1/1) ... [2023-04-02 15:04:08,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 15:04:09,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:04:09,018 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 15:04:09,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 15:04:09,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 15:04:09,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 15:04:09,051 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 15:04:09,053 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 15:04:09,053 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 15:04:09,053 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 15:04:09,053 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 15:04:09,054 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 15:04:09,054 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 15:04:09,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 15:04:09,054 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 15:04:09,054 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 15:04:09,054 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 15:04:09,054 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2023-04-02 15:04:09,054 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 15:04:09,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 15:04:09,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 15:04:09,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 15:04:09,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 15:04:09,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 15:04:09,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 15:04:09,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 15:04:09,113 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 15:04:09,115 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 15:04:09,346 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 15:04:09,387 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 15:04:09,387 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-04-02 15:04:09,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 03:04:09 BoogieIcfgContainer [2023-04-02 15:04:09,389 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 15:04:09,391 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 15:04:09,391 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 15:04:09,393 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 15:04:09,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 03:04:08" (1/3) ... [2023-04-02 15:04:09,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@add1158 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 03:04:09, skipping insertion in model container [2023-04-02 15:04:09,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 03:04:08" (2/3) ... [2023-04-02 15:04:09,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@add1158 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 03:04:09, skipping insertion in model container [2023-04-02 15:04:09,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 03:04:09" (3/3) ... [2023-04-02 15:04:09,395 INFO L112 eAbstractionObserver]: Analyzing ICFG array12_pattern.c [2023-04-02 15:04:09,410 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 15:04:09,410 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 15:04:09,468 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 15:04:09,474 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;@2c38d3c1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 15:04:09,474 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 15:04:09,478 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 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) [2023-04-02 15:04:09,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-02 15:04:09,485 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:04:09,486 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:04:09,487 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:04:09,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:04:09,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1497728649, now seen corresponding path program 1 times [2023-04-02 15:04:09,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:04:09,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815771280] [2023-04-02 15:04:09,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:04:09,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:04:09,594 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:04:09,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1341157765] [2023-04-02 15:04:09,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:04:09,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:04:09,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:04:09,598 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:04:09,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 15:04:09,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:04:09,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-02 15:04:09,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:04:09,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 15:04:09,706 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 15:04:09,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:04:09,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815771280] [2023-04-02 15:04:09,707 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:04:09,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341157765] [2023-04-02 15:04:09,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341157765] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:04:09,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:04:09,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 15:04:09,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260263918] [2023-04-02 15:04:09,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:04:09,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 15:04:09,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:04:09,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 15:04:09,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 15:04:09,743 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 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) [2023-04-02 15:04:09,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:04:09,798 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2023-04-02 15:04:09,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 15:04:09,801 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 [2023-04-02 15:04:09,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:04:09,806 INFO L225 Difference]: With dead ends: 44 [2023-04-02 15:04:09,807 INFO L226 Difference]: Without dead ends: 24 [2023-04-02 15:04:09,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 15:04:09,816 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 15:04:09,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 15:04:09,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-02 15:04:09,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-04-02 15:04:09,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 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) [2023-04-02 15:04:09,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2023-04-02 15:04:09,848 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 17 [2023-04-02 15:04:09,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:04:09,849 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-04-02 15:04:09,849 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) [2023-04-02 15:04:09,850 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2023-04-02 15:04:09,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-02 15:04:09,851 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:04:09,851 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] [2023-04-02 15:04:09,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 15:04:10,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-02 15:04:10,057 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:04:10,058 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:04:10,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1173002227, now seen corresponding path program 1 times [2023-04-02 15:04:10,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:04:10,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209253447] [2023-04-02 15:04:10,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:04:10,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:04:10,092 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:04:10,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [842118002] [2023-04-02 15:04:10,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:04:10,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:04:10,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:04:10,094 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:04:10,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 15:04:10,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:04:10,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 15:04:10,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:04:10,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 15:04:10,272 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 15:04:10,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:04:10,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209253447] [2023-04-02 15:04:10,276 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:04:10,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842118002] [2023-04-02 15:04:10,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842118002] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:04:10,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:04:10,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 15:04:10,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890801254] [2023-04-02 15:04:10,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:04:10,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 15:04:10,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:04:10,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 15:04:10,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 15:04:10,280 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 15:04:10,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:04:10,368 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2023-04-02 15:04:10,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 15:04:10,369 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2023-04-02 15:04:10,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:04:10,370 INFO L225 Difference]: With dead ends: 45 [2023-04-02 15:04:10,370 INFO L226 Difference]: Without dead ends: 30 [2023-04-02 15:04:10,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-02 15:04:10,371 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 25 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:04:10,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 41 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:04:10,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-02 15:04:10,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2023-04-02 15:04:10,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 15:04:10,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2023-04-02 15:04:10,377 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 25 [2023-04-02 15:04:10,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:04:10,378 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2023-04-02 15:04:10,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 15:04:10,378 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2023-04-02 15:04:10,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-02 15:04:10,378 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:04:10,379 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, 1, 1] [2023-04-02 15:04:10,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-02 15:04:10,584 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,SelfDestructingSolverStorable1 [2023-04-02 15:04:10,585 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:04:10,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:04:10,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1636493345, now seen corresponding path program 1 times [2023-04-02 15:04:10,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:04:10,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837151007] [2023-04-02 15:04:10,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:04:10,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:04:10,600 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:04:10,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [904867249] [2023-04-02 15:04:10,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:04:10,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:04:10,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:04:10,602 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:04:10,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 15:04:10,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:04:10,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 15:04:10,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:04:10,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 15:04:10,729 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 15:04:10,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:04:10,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837151007] [2023-04-02 15:04:10,729 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:04:10,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904867249] [2023-04-02 15:04:10,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904867249] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 15:04:10,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 15:04:10,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 15:04:10,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374783998] [2023-04-02 15:04:10,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 15:04:10,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 15:04:10,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:04:10,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 15:04:10,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 15:04:10,731 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 15:04:10,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:04:10,789 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2023-04-02 15:04:10,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 15:04:10,789 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2023-04-02 15:04:10,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:04:10,790 INFO L225 Difference]: With dead ends: 48 [2023-04-02 15:04:10,790 INFO L226 Difference]: Without dead ends: 30 [2023-04-02 15:04:10,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 15:04:10,792 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 15:04:10,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 49 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 15:04:10,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-02 15:04:10,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-04-02 15:04:10,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 15:04:10,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2023-04-02 15:04:10,799 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 29 [2023-04-02 15:04:10,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:04:10,800 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2023-04-02 15:04:10,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 15:04:10,800 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2023-04-02 15:04:10,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-02 15:04:10,801 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:04:10,801 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, 1, 1, 1, 1] [2023-04-02 15:04:10,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 15:04:11,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:04:11,008 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:04:11,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:04:11,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1591636068, now seen corresponding path program 1 times [2023-04-02 15:04:11,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:04:11,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610174513] [2023-04-02 15:04:11,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:04:11,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:04:11,025 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:04:11,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1680277548] [2023-04-02 15:04:11,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:04:11,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:04:11,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:04:11,035 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:04:11,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 15:04:11,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:04:11,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 44 conjunts are in the unsatisfiable core [2023-04-02 15:04:11,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:04:11,482 INFO L321 Elim1Store]: treesize reduction 57, result has 1.7 percent of original size [2023-04-02 15:04:11,483 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 1 case distinctions, treesize of input 32 treesize of output 16 [2023-04-02 15:04:11,711 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2023-04-02 15:04:11,711 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 24 treesize of output 10 [2023-04-02 15:04:11,775 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 15:04:11,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:04:11,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2023-04-02 15:04:11,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 78 [2023-04-02 15:04:11,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2023-04-02 15:04:11,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 78 [2023-04-02 15:04:12,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:04:12,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610174513] [2023-04-02 15:04:12,143 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:04:12,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680277548] [2023-04-02 15:04:12,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680277548] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 15:04:12,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1889619927] [2023-04-02 15:04:12,158 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-02 15:04:12,158 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:04:12,161 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:04:12,165 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:04:12,166 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:04:12,227 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-02 15:04:13,704 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 80 for LOIs [2023-04-02 15:04:13,802 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2023-04-02 15:04:13,805 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:04:13,810 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:04:15,936 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '754#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 15:04:15,936 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:04:15,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 15:04:15,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-04-02 15:04:15,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486491745] [2023-04-02 15:04:15,937 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 15:04:15,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-02 15:04:15,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:04:15,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-02 15:04:15,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=2041, Unknown=0, NotChecked=0, Total=2256 [2023-04-02 15:04:15,940 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 18 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 13 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-02 15:04:16,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:04:16,641 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2023-04-02 15:04:16,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-02 15:04:16,641 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 13 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2023-04-02 15:04:16,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:04:16,643 INFO L225 Difference]: With dead ends: 66 [2023-04-02 15:04:16,643 INFO L226 Difference]: Without dead ends: 61 [2023-04-02 15:04:16,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=387, Invalid=3395, Unknown=0, NotChecked=0, Total=3782 [2023-04-02 15:04:16,645 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 59 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 15:04:16,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 135 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 15:04:16,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-04-02 15:04:16,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2023-04-02 15:04:16,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 15:04:16,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2023-04-02 15:04:16,657 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 31 [2023-04-02 15:04:16,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:04:16,657 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2023-04-02 15:04:16,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 13 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-02 15:04:16,657 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2023-04-02 15:04:16,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-02 15:04:16,658 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:04:16,658 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-04-02 15:04:16,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 15:04:16,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:04:16,864 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:04:16,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:04:16,865 INFO L85 PathProgramCache]: Analyzing trace with hash 183017824, now seen corresponding path program 2 times [2023-04-02 15:04:16,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:04:16,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712568097] [2023-04-02 15:04:16,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:04:16,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:04:16,897 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:04:16,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1559662669] [2023-04-02 15:04:16,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 15:04:16,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:04:16,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:04:16,904 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:04:16,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 15:04:16,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 15:04:16,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:04:16,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 15:04:16,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:04:17,016 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 15:04:17,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:04:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 15:04:17,058 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:04:17,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712568097] [2023-04-02 15:04:17,058 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:04:17,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559662669] [2023-04-02 15:04:17,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559662669] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:04:17,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [845186011] [2023-04-02 15:04:17,067 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-02 15:04:17,068 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:04:17,068 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:04:17,068 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:04:17,068 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:04:17,098 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-02 15:04:18,053 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 80 for LOIs [2023-04-02 15:04:18,121 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2023-04-02 15:04:18,123 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:04:18,127 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:04:19,425 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1193#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 15:04:19,425 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:04:19,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:04:19,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-04-02 15:04:19,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961302719] [2023-04-02 15:04:19,426 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 15:04:19,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 15:04:19,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:04:19,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 15:04:19,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=918, Unknown=0, NotChecked=0, Total=1056 [2023-04-02 15:04:19,428 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-02 15:04:19,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:04:19,576 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2023-04-02 15:04:19,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 15:04:19,577 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2023-04-02 15:04:19,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:04:19,578 INFO L225 Difference]: With dead ends: 74 [2023-04-02 15:04:19,578 INFO L226 Difference]: Without dead ends: 57 [2023-04-02 15:04:19,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=176, Invalid=1156, Unknown=0, NotChecked=0, Total=1332 [2023-04-02 15:04:19,579 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 16 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:04:19,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 106 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:04:19,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-04-02 15:04:19,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2023-04-02 15:04:19,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 38 states have internal predecessors, (50), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 15:04:19,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2023-04-02 15:04:19,599 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 32 [2023-04-02 15:04:19,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:04:19,600 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2023-04-02 15:04:19,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-02 15:04:19,600 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2023-04-02 15:04:19,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-02 15:04:19,602 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:04:19,602 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 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] [2023-04-02 15:04:19,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 15:04:19,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:04:19,803 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:04:19,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:04:19,804 INFO L85 PathProgramCache]: Analyzing trace with hash 437447480, now seen corresponding path program 3 times [2023-04-02 15:04:19,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:04:19,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905931216] [2023-04-02 15:04:19,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:04:19,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:04:19,817 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:04:19,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [313593198] [2023-04-02 15:04:19,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 15:04:19,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:04:19,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:04:19,821 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 15:04:19,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 15:04:19,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 15:04:19,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:04:19,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 15:04:19,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:04:19,928 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 15:04:19,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:04:19,971 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 15:04:19,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:04:19,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905931216] [2023-04-02 15:04:19,971 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:04:19,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313593198] [2023-04-02 15:04:19,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313593198] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:04:19,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1538785167] [2023-04-02 15:04:19,974 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-02 15:04:19,974 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:04:19,974 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:04:19,974 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:04:19,974 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:04:19,996 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-02 15:04:20,762 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 80 for LOIs [2023-04-02 15:04:20,819 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2023-04-02 15:04:20,821 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:04:20,824 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:04:21,992 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1652#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 15:04:21,993 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:04:21,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:04:21,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-04-02 15:04:21,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365488277] [2023-04-02 15:04:21,993 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 15:04:21,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 15:04:21,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:04:21,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 15:04:21,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2023-04-02 15:04:21,995 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 15:04:22,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:04:22,161 INFO L93 Difference]: Finished difference Result 87 states and 111 transitions. [2023-04-02 15:04:22,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 15:04:22,162 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 34 [2023-04-02 15:04:22,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:04:22,165 INFO L225 Difference]: With dead ends: 87 [2023-04-02 15:04:22,165 INFO L226 Difference]: Without dead ends: 64 [2023-04-02 15:04:22,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=180, Invalid=1152, Unknown=0, NotChecked=0, Total=1332 [2023-04-02 15:04:22,166 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 43 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:04:22,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 65 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:04:22,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-04-02 15:04:22,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2023-04-02 15:04:22,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 41 states have internal predecessors, (53), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 15:04:22,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2023-04-02 15:04:22,181 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 34 [2023-04-02 15:04:22,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:04:22,182 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2023-04-02 15:04:22,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 15:04:22,182 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2023-04-02 15:04:22,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-02 15:04:22,183 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:04:22,183 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 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] [2023-04-02 15:04:22,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-02 15:04:22,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:04:22,388 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:04:22,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:04:22,389 INFO L85 PathProgramCache]: Analyzing trace with hash 544808616, now seen corresponding path program 4 times [2023-04-02 15:04:22,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:04:22,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5549128] [2023-04-02 15:04:22,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:04:22,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:04:22,410 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:04:22,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1678309612] [2023-04-02 15:04:22,410 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 15:04:22,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:04:22,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:04:22,415 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) [2023-04-02 15:04:22,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 15:04:22,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 15:04:22,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 15:04:22,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:04:22,502 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 15:04:22,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 15:04:22,542 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 15:04:22,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 15:04:22,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5549128] [2023-04-02 15:04:22,542 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 15:04:22,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678309612] [2023-04-02 15:04:22,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678309612] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 15:04:22,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1502585044] [2023-04-02 15:04:22,544 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-02 15:04:22,544 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 15:04:22,545 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 15:04:22,545 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 15:04:22,545 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 15:04:22,569 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-02 15:04:23,320 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 80 for LOIs [2023-04-02 15:04:23,383 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2023-04-02 15:04:23,385 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 15:04:23,388 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 15:04:24,483 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2146#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 15:04:24,483 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 15:04:24,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 15:04:24,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-04-02 15:04:24,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670006653] [2023-04-02 15:04:24,483 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 15:04:24,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 15:04:24,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 15:04:24,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 15:04:24,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2023-04-02 15:04:24,485 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 15:04:24,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 15:04:24,580 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2023-04-02 15:04:24,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 15:04:24,581 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 35 [2023-04-02 15:04:24,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 15:04:24,581 INFO L225 Difference]: With dead ends: 63 [2023-04-02 15:04:24,581 INFO L226 Difference]: Without dead ends: 40 [2023-04-02 15:04:24,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=156, Invalid=966, Unknown=0, NotChecked=0, Total=1122 [2023-04-02 15:04:24,582 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 25 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 15:04:24,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 83 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 15:04:24,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-04-02 15:04:24,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-04-02 15:04:24,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 15:04:24,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2023-04-02 15:04:24,588 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 35 [2023-04-02 15:04:24,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 15:04:24,588 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2023-04-02 15:04:24,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-02 15:04:24,589 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2023-04-02 15:04:24,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-02 15:04:24,589 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 15:04:24,590 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 15:04:24,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 15:04:24,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:04:24,795 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 15:04:24,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 15:04:24,795 INFO L85 PathProgramCache]: Analyzing trace with hash -954025867, now seen corresponding path program 5 times [2023-04-02 15:04:24,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 15:04:24,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195055711] [2023-04-02 15:04:24,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 15:04:24,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 15:04:24,805 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 15:04:24,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2057548444] [2023-04-02 15:04:24,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 15:04:24,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 15:04:24,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 15:04:24,807 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) [2023-04-02 15:04:24,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 15:04:25,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-04-02 15:04:25,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 15:04:25,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 88 conjunts are in the unsatisfiable core [2023-04-02 15:04:25,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 15:04:25,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-02 15:04:25,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-02 15:04:25,654 INFO L321 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2023-04-02 15:04:25,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2023-04-02 15:04:25,704 INFO L321 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2023-04-02 15:04:25,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 51 [2023-04-02 15:04:26,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:04:26,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:04:26,437 INFO L321 Elim1Store]: treesize reduction 242, result has 38.6 percent of original size [2023-04-02 15:04:26,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 72 treesize of output 179 [2023-04-02 15:04:30,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:04:30,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:04:30,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:04:30,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 15:04:57,951 WARN L223 SmtUtils]: Spent 27.34s on a formula simplification. DAG size of input: 361 DAG size of output: 289 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-04-02 15:04:57,954 INFO L321 Elim1Store]: treesize reduction 221, result has 80.8 percent of original size [2023-04-02 15:04:57,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 6 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 288 treesize of output 1049