/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/loops/matrix-2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 11:02:08,115 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 11:02:08,117 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 11:02:08,144 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 11:02:08,144 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 11:02:08,147 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 11:02:08,150 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 11:02:08,152 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 11:02:08,154 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 11:02:08,158 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 11:02:08,160 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 11:02:08,161 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 11:02:08,161 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 11:02:08,164 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 11:02:08,164 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 11:02:08,165 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 11:02:08,166 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 11:02:08,168 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 11:02:08,170 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 11:02:08,174 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 11:02:08,175 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 11:02:08,176 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 11:02:08,177 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 11:02:08,178 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 11:02:08,186 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 11:02:08,186 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 11:02:08,186 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 11:02:08,187 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 11:02:08,188 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 11:02:08,188 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 11:02:08,189 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 11:02:08,189 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 11:02:08,191 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 11:02:08,191 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 11:02:08,192 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 11:02:08,192 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 11:02:08,192 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 11:02:08,193 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 11:02:08,193 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 11:02:08,193 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 11:02:08,194 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 11:02:08,196 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 11:02:08,223 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 11:02:08,224 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 11:02:08,224 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 11:02:08,224 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 11:02:08,224 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 11:02:08,224 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 11:02:08,225 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 11:02:08,225 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 11:02:08,225 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 11:02:08,225 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 11:02:08,225 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 11:02:08,225 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 11:02:08,225 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 11:02:08,225 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 11:02:08,225 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 11:02:08,225 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 11:02:08,225 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 11:02:08,225 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 11:02:08,226 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 11:02:08,226 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 11:02:08,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 11:02:08,226 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 11:02:08,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 11:02:08,226 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 11:02:08,226 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 11:02:08,226 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 11:02:08,226 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 11:02:08,227 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 11:02:08,227 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 11:02:08,227 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 11:02:08,227 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 11:02:08,227 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 11:02:08,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:02:08,227 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 11:02:08,227 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 11:02:08,227 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 11:02:08,227 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 11:02:08,227 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 11:02:08,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 11:02:08,228 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 11:02:08,228 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 11:02:08,228 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 11:02:08,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 11:02:08,551 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 11:02:08,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 11:02:08,569 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 11:02:08,569 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 11:02:08,570 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/matrix-2-2.c [2023-04-01 11:02:09,673 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 11:02:09,866 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 11:02:09,866 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/matrix-2-2.c [2023-04-01 11:02:09,871 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9033681a6/6b5e94fe3cf845c88b4038458f927030/FLAG607973041 [2023-04-01 11:02:09,890 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9033681a6/6b5e94fe3cf845c88b4038458f927030 [2023-04-01 11:02:09,892 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 11:02:09,894 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 11:02:09,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 11:02:09,898 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 11:02:09,900 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 11:02:09,901 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:02:09" (1/1) ... [2023-04-01 11:02:09,902 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21faae18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:02:09, skipping insertion in model container [2023-04-01 11:02:09,902 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:02:09" (1/1) ... [2023-04-01 11:02:09,907 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 11:02:09,917 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 11:02:10,026 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/loops/matrix-2-2.c[322,335] [2023-04-01 11:02:10,043 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:02:10,049 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 11:02:10,056 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/loops/matrix-2-2.c[322,335] [2023-04-01 11:02:10,071 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:02:10,082 INFO L208 MainTranslator]: Completed translation [2023-04-01 11:02:10,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:02:10 WrapperNode [2023-04-01 11:02:10,082 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 11:02:10,083 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 11:02:10,083 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 11:02:10,083 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 11:02:10,091 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:02:10" (1/1) ... [2023-04-01 11:02:10,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:02:10" (1/1) ... [2023-04-01 11:02:10,100 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:02:10" (1/1) ... [2023-04-01 11:02:10,100 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:02:10" (1/1) ... [2023-04-01 11:02:10,111 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:02:10" (1/1) ... [2023-04-01 11:02:10,115 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:02:10" (1/1) ... [2023-04-01 11:02:10,120 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:02:10" (1/1) ... [2023-04-01 11:02:10,120 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:02:10" (1/1) ... [2023-04-01 11:02:10,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 11:02:10,122 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 11:02:10,122 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 11:02:10,122 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 11:02:10,123 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:02:10" (1/1) ... [2023-04-01 11:02:10,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:02:10,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:02:10,163 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 11:02:10,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 11:02:10,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 11:02:10,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 11:02:10,191 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 11:02:10,192 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 11:02:10,192 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 11:02:10,192 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 11:02:10,192 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 11:02:10,192 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 11:02:10,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 11:02:10,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 11:02:10,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-01 11:02:10,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 11:02:10,192 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 11:02:10,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 11:02:10,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 11:02:10,192 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 11:02:10,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 11:02:10,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 11:02:10,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 11:02:10,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 11:02:10,262 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 11:02:10,264 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 11:02:10,397 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 11:02:10,444 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 11:02:10,444 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-04-01 11:02:10,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:02:10 BoogieIcfgContainer [2023-04-01 11:02:10,446 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 11:02:10,447 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 11:02:10,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 11:02:10,449 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 11:02:10,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:02:09" (1/3) ... [2023-04-01 11:02:10,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bde05b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:02:10, skipping insertion in model container [2023-04-01 11:02:10,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:02:10" (2/3) ... [2023-04-01 11:02:10,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bde05b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:02:10, skipping insertion in model container [2023-04-01 11:02:10,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:02:10" (3/3) ... [2023-04-01 11:02:10,451 INFO L112 eAbstractionObserver]: Analyzing ICFG matrix-2-2.c [2023-04-01 11:02:10,462 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 11:02:10,462 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 11:02:10,508 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 11:02:10,512 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;@5dd49245, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 11:02:10,537 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 11:02:10,540 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 11:02:10,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-01 11:02:10,544 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:02:10,545 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:02:10,545 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:02:10,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:02:10,549 INFO L85 PathProgramCache]: Analyzing trace with hash -868852588, now seen corresponding path program 1 times [2023-04-01 11:02:10,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:02:10,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84708586] [2023-04-01 11:02:10,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:02:10,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:02:10,657 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:02:10,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1208267287] [2023-04-01 11:02:10,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:02:10,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:02:10,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:02:10,667 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:02:10,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 11:02:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:02:10,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 11:02:10,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:02:10,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:02:10,825 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:02:10,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:02:10,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84708586] [2023-04-01 11:02:10,825 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:02:10,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208267287] [2023-04-01 11:02:10,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208267287] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:02:10,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:02:10,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 11:02:10,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793178972] [2023-04-01 11:02:10,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:02:10,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 11:02:10,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:02:10,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 11:02:10,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 11:02:10,859 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:02:10,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:02:10,934 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2023-04-01 11:02:10,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 11:02:10,936 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-04-01 11:02:10,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:02:10,944 INFO L225 Difference]: With dead ends: 45 [2023-04-01 11:02:10,944 INFO L226 Difference]: Without dead ends: 24 [2023-04-01 11:02:10,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 11:02:10,951 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 7 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:02:10,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 47 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:02:10,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-01 11:02:10,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2023-04-01 11:02:10,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:02:10,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2023-04-01 11:02:10,977 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 13 [2023-04-01 11:02:10,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:02:10,977 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2023-04-01 11:02:10,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:02:10,978 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-04-01 11:02:10,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 11:02:10,978 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:02:10,978 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:02:10,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 11:02:11,184 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 [2023-04-01 11:02:11,184 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:02:11,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:02:11,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1158865887, now seen corresponding path program 1 times [2023-04-01 11:02:11,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:02:11,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33911174] [2023-04-01 11:02:11,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:02:11,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:02:11,196 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:02:11,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [499423847] [2023-04-01 11:02:11,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:02:11,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:02:11,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:02:11,199 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:02:11,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 11:02:11,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:02:11,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 11:02:11,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:02:11,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:02:11,294 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 11:02:11,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:02:11,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33911174] [2023-04-01 11:02:11,295 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 11:02:11,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499423847] [2023-04-01 11:02:11,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499423847] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:02:11,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:02:11,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 11:02:11,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337835336] [2023-04-01 11:02:11,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:02:11,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:02:11,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:02:11,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:02:11,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:02:11,297 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:02:11,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:02:11,384 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2023-04-01 11:02:11,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 11:02:11,385 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-04-01 11:02:11,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:02:11,386 INFO L225 Difference]: With dead ends: 39 [2023-04-01 11:02:11,386 INFO L226 Difference]: Without dead ends: 23 [2023-04-01 11:02:11,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:02:11,387 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 7 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:02:11,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 38 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:02:11,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-01 11:02:11,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2023-04-01 11:02:11,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:02:11,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-04-01 11:02:11,393 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 15 [2023-04-01 11:02:11,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:02:11,393 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-04-01 11:02:11,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:02:11,393 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-04-01 11:02:11,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 11:02:11,394 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:02:11,394 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:02:11,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 11:02:11,602 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 [2023-04-01 11:02:11,602 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:02:11,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:02:11,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1722501439, now seen corresponding path program 1 times [2023-04-01 11:02:11,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:02:11,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618472207] [2023-04-01 11:02:11,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:02:11,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:02:11,614 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 11:02:11,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1832174827] [2023-04-01 11:02:11,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:02:11,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:02:11,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:02:11,615 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:02:11,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 11:02:11,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 11:02:11,704 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-04-01 11:02:11,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 11:02:11,751 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-04-01 11:02:11,752 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-04-01 11:02:11,752 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 11:02:11,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 11:02:11,954 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 [2023-04-01 11:02:11,956 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-04-01 11:02:11,959 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-01 11:02:11,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.04 11:02:11 BoogieIcfgContainer [2023-04-01 11:02:11,972 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-01 11:02:11,972 INFO L158 Benchmark]: Toolchain (without parser) took 2078.40ms. Allocated memory is still 315.6MB. Free memory was 277.6MB in the beginning and 271.3MB in the end (delta: 6.3MB). Peak memory consumption was 6.6MB. Max. memory is 8.0GB. [2023-04-01 11:02:11,972 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 185.6MB. Free memory is still 135.6MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 11:02:11,973 INFO L158 Benchmark]: CACSL2BoogieTranslator took 184.94ms. Allocated memory is still 315.6MB. Free memory was 277.6MB in the beginning and 267.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-01 11:02:11,973 INFO L158 Benchmark]: Boogie Preprocessor took 38.89ms. Allocated memory is still 315.6MB. Free memory was 267.1MB in the beginning and 265.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-04-01 11:02:11,973 INFO L158 Benchmark]: RCFGBuilder took 323.69ms. Allocated memory is still 315.6MB. Free memory was 265.5MB in the beginning and 249.1MB in the end (delta: 16.3MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. [2023-04-01 11:02:11,973 INFO L158 Benchmark]: TraceAbstraction took 1524.40ms. Allocated memory is still 315.6MB. Free memory was 248.2MB in the beginning and 271.3MB in the end (delta: -23.1MB). There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 11:02:11,974 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 185.6MB. Free memory is still 135.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 184.94ms. Allocated memory is still 315.6MB. Free memory was 277.6MB in the beginning and 267.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 38.89ms. Allocated memory is still 315.6MB. Free memory was 267.1MB in the beginning and 265.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 323.69ms. Allocated memory is still 315.6MB. Free memory was 265.5MB in the beginning and 249.1MB in the end (delta: 16.3MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. * TraceAbstraction took 1524.40ms. Allocated memory is still 315.6MB. Free memory was 248.2MB in the beginning and 271.3MB in the end (delta: -23.1MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L16] unsigned int N_LIN=__VERIFIER_nondet_uint(); [L17] unsigned int N_COL=__VERIFIER_nondet_uint(); [L18] COND FALSE !(N_LIN >= 4000000000 / sizeof(int) || N_COL >= 4000000000 / sizeof(int)) [L21] unsigned int j,k; [L22] int matriz[N_COL][N_LIN], maior; [L24] maior = __VERIFIER_nondet_int() [L25] j=0 VAL [N_COL=1, N_LIN=1, j=0, maior=-1, matriz={4:0}] [L25] COND TRUE jmaior [L31] EXPR matriz[j][k] [L31] maior = matriz[j][k] [L26] k++ VAL [N_COL=1, N_LIN=1, j=0, k=1, maior=0, matriz={4:0}, matriz[j][k]=0] [L26] COND FALSE !(k