/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/loops/matrix-2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 21:59:33,438 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 21:59:33,440 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 21:59:33,476 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 21:59:33,477 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 21:59:33,480 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 21:59:33,483 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 21:59:33,486 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 21:59:33,488 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 21:59:33,489 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 21:59:33,490 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 21:59:33,491 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 21:59:33,491 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 21:59:33,492 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 21:59:33,493 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 21:59:33,494 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 21:59:33,494 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 21:59:33,495 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 21:59:33,496 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 21:59:33,501 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 21:59:33,502 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 21:59:33,505 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 21:59:33,507 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 21:59:33,508 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 21:59:33,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 21:59:33,515 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 21:59:33,515 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 21:59:33,516 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 21:59:33,517 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 21:59:33,517 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 21:59:33,517 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 21:59:33,518 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 21:59:33,519 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 21:59:33,519 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 21:59:33,520 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 21:59:33,520 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 21:59:33,520 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 21:59:33,521 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 21:59:33,521 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 21:59:33,521 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 21:59:33,522 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 21:59:33,526 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 21:59:33,553 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 21:59:33,554 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 21:59:33,554 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 21:59:33,554 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 21:59:33,555 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 21:59:33,555 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 21:59:33,555 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 21:59:33,556 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 21:59:33,556 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 21:59:33,556 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 21:59:33,557 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 21:59:33,557 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 21:59:33,557 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 21:59:33,557 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 21:59:33,557 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 21:59:33,557 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 21:59:33,558 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 21:59:33,558 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 21:59:33,558 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 21:59:33,558 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 21:59:33,559 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 21:59:33,559 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 21:59:33,559 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 21:59:33,559 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 21:59:33,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 21:59:33,559 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 21:59:33,559 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 21:59:33,560 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 21:59:33,560 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 21:59:33,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 21:59:33,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 21:59:33,560 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 21:59:33,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 21:59:33,560 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 21:59:33,561 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 21:59:33,561 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 21:59:33,561 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 21:59:33,561 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 21:59:33,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 21:59:33,561 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 21:59:33,561 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 21:59:33,561 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 21:59:33,821 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 21:59:33,845 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 21:59:33,847 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 21:59:33,849 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 21:59:33,849 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 21:59:33,851 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/matrix-2-2.c [2023-04-02 21:59:34,932 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 21:59:35,138 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 21:59:35,139 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/matrix-2-2.c [2023-04-02 21:59:35,143 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd4a8fc60/4eb99372852c49b28517d4f8fd6bfd79/FLAG4bc296696 [2023-04-02 21:59:35,156 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd4a8fc60/4eb99372852c49b28517d4f8fd6bfd79 [2023-04-02 21:59:35,158 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 21:59:35,159 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 21:59:35,160 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 21:59:35,160 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 21:59:35,163 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 21:59:35,164 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 09:59:35" (1/1) ... [2023-04-02 21:59:35,164 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d1943f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:59:35, skipping insertion in model container [2023-04-02 21:59:35,164 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 09:59:35" (1/1) ... [2023-04-02 21:59:35,172 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 21:59:35,184 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 21:59:35,292 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] [2023-04-02 21:59:35,310 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 21:59:35,318 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 21:59:35,329 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] [2023-04-02 21:59:35,337 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 21:59:35,348 INFO L208 MainTranslator]: Completed translation [2023-04-02 21:59:35,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:59:35 WrapperNode [2023-04-02 21:59:35,349 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 21:59:35,349 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 21:59:35,350 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 21:59:35,350 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 21:59:35,358 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:59:35" (1/1) ... [2023-04-02 21:59:35,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:59:35" (1/1) ... [2023-04-02 21:59:35,363 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:59:35" (1/1) ... [2023-04-02 21:59:35,363 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:59:35" (1/1) ... [2023-04-02 21:59:35,369 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:59:35" (1/1) ... [2023-04-02 21:59:35,372 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:59:35" (1/1) ... [2023-04-02 21:59:35,374 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:59:35" (1/1) ... [2023-04-02 21:59:35,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:59:35" (1/1) ... [2023-04-02 21:59:35,377 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 21:59:35,378 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 21:59:35,378 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 21:59:35,378 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 21:59:35,379 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:59:35" (1/1) ... [2023-04-02 21:59:35,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 21:59:35,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:59:35,412 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 21:59:35,413 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 21:59:35,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 21:59:35,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 21:59:35,446 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 21:59:35,446 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 21:59:35,446 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 21:59:35,446 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 21:59:35,446 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 21:59:35,447 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 21:59:35,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 21:59:35,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 21:59:35,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-02 21:59:35,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 21:59:35,447 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 21:59:35,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 21:59:35,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 21:59:35,447 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 21:59:35,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 21:59:35,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 21:59:35,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 21:59:35,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 21:59:35,506 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 21:59:35,508 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 21:59:35,707 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 21:59:35,823 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 21:59:35,823 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-04-02 21:59:35,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 09:59:35 BoogieIcfgContainer [2023-04-02 21:59:35,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 21:59:35,830 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 21:59:35,830 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 21:59:35,833 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 21:59:35,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 09:59:35" (1/3) ... [2023-04-02 21:59:35,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f560793 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 09:59:35, skipping insertion in model container [2023-04-02 21:59:35,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:59:35" (2/3) ... [2023-04-02 21:59:35,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f560793 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 09:59:35, skipping insertion in model container [2023-04-02 21:59:35,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 09:59:35" (3/3) ... [2023-04-02 21:59:35,835 INFO L112 eAbstractionObserver]: Analyzing ICFG matrix-2-2.c [2023-04-02 21:59:35,853 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 21:59:35,854 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 21:59:35,898 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 21:59:35,904 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;@5d95267d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 21:59:35,904 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 21:59:35,908 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) [2023-04-02 21:59:35,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-02 21:59:35,915 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:59:35,915 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:59:35,916 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:59:35,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:59:35,921 INFO L85 PathProgramCache]: Analyzing trace with hash -868852588, now seen corresponding path program 1 times [2023-04-02 21:59:35,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:59:35,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030604864] [2023-04-02 21:59:35,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:59:35,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:59:36,016 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 21:59:36,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [87024793] [2023-04-02 21:59:36,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:59:36,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:59:36,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:59:36,019 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 21:59:36,021 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 21:59:36,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:59:36,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 21:59:36,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:59:36,172 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 21:59:36,172 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 21:59:36,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:59:36,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030604864] [2023-04-02 21:59:36,173 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 21:59:36,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87024793] [2023-04-02 21:59:36,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87024793] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:59:36,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:59:36,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 21:59:36,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425962081] [2023-04-02 21:59:36,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:59:36,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 21:59:36,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:59:36,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 21:59:36,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 21:59:36,236 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) [2023-04-02 21:59:36,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:59:36,347 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2023-04-02 21:59:36,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 21:59:36,350 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 [2023-04-02 21:59:36,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:59:36,356 INFO L225 Difference]: With dead ends: 45 [2023-04-02 21:59:36,356 INFO L226 Difference]: Without dead ends: 24 [2023-04-02 21:59:36,359 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 [2023-04-02 21:59:36,365 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 7 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 21:59:36,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 47 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 21:59:36,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-02 21:59:36,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2023-04-02 21:59:36,401 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) [2023-04-02 21:59:36,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2023-04-02 21:59:36,402 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 13 [2023-04-02 21:59:36,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:59:36,403 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2023-04-02 21:59:36,403 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) [2023-04-02 21:59:36,403 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-04-02 21:59:36,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 21:59:36,404 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:59:36,404 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:59:36,412 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 21:59:36,610 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 21:59:36,611 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:59:36,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:59:36,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1158865887, now seen corresponding path program 1 times [2023-04-02 21:59:36,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:59:36,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725771624] [2023-04-02 21:59:36,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:59:36,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:59:36,633 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 21:59:36,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [488294383] [2023-04-02 21:59:36,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:59:36,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:59:36,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:59:36,639 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 21:59:36,642 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 21:59:36,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:59:36,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 21:59:36,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:59:36,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:59:36,738 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 21:59:36,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:59:36,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725771624] [2023-04-02 21:59:36,738 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 21:59:36,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488294383] [2023-04-02 21:59:36,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488294383] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:59:36,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:59:36,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 21:59:36,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715540939] [2023-04-02 21:59:36,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:59:36,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 21:59:36,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:59:36,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 21:59:36,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 21:59:36,741 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) [2023-04-02 21:59:36,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:59:36,786 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2023-04-02 21:59:36,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 21:59:36,787 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 [2023-04-02 21:59:36,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:59:36,787 INFO L225 Difference]: With dead ends: 39 [2023-04-02 21:59:36,788 INFO L226 Difference]: Without dead ends: 23 [2023-04-02 21:59:36,788 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 [2023-04-02 21:59:36,789 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 7 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 21:59:36,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 38 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 21:59:36,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-02 21:59:36,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2023-04-02 21:59:36,799 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) [2023-04-02 21:59:36,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-04-02 21:59:36,801 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 15 [2023-04-02 21:59:36,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:59:36,802 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-04-02 21:59:36,802 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) [2023-04-02 21:59:36,802 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-04-02 21:59:36,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-02 21:59:36,803 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:59:36,804 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:59:36,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 21:59:37,009 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 21:59:37,010 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:59:37,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:59:37,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1722501439, now seen corresponding path program 1 times [2023-04-02 21:59:37,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:59:37,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036181511] [2023-04-02 21:59:37,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:59:37,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:59:37,023 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 21:59:37,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1665997160] [2023-04-02 21:59:37,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:59:37,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:59:37,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:59:37,026 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 21:59:37,028 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 21:59:37,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-02 21:59:37,129 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-04-02 21:59:37,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-02 21:59:37,168 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-04-02 21:59:37,168 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-04-02 21:59:37,169 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-02 21:59:37,181 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 21:59:37,371 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 21:59:37,374 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-04-02 21:59:37,377 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-02 21:59:37,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.04 09:59:37 BoogieIcfgContainer [2023-04-02 21:59:37,399 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-02 21:59:37,404 INFO L158 Benchmark]: Toolchain (without parser) took 2240.68ms. Allocated memory is still 217.1MB. Free memory was 169.2MB in the beginning and 153.3MB in the end (delta: 16.0MB). Peak memory consumption was 16.9MB. Max. memory is 8.0GB. [2023-04-02 21:59:37,405 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 180.4MB. Free memory is still 126.7MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-02 21:59:37,406 INFO L158 Benchmark]: CACSL2BoogieTranslator took 188.89ms. Allocated memory is still 217.1MB. Free memory was 169.2MB in the beginning and 158.7MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-02 21:59:37,407 INFO L158 Benchmark]: Boogie Preprocessor took 28.07ms. Allocated memory is still 217.1MB. Free memory was 158.7MB in the beginning and 157.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-04-02 21:59:37,408 INFO L158 Benchmark]: RCFGBuilder took 447.26ms. Allocated memory is still 217.1MB. Free memory was 157.1MB in the beginning and 140.9MB in the end (delta: 16.2MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. [2023-04-02 21:59:37,408 INFO L158 Benchmark]: TraceAbstraction took 1569.58ms. Allocated memory is still 217.1MB. Free memory was 139.9MB in the beginning and 153.3MB in the end (delta: -13.4MB). There was no memory consumed. Max. memory is 8.0GB. [2023-04-02 21:59:37,410 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 180.4MB. Free memory is still 126.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 188.89ms. Allocated memory is still 217.1MB. Free memory was 169.2MB in the beginning and 158.7MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 28.07ms. Allocated memory is still 217.1MB. Free memory was 158.7MB in the beginning and 157.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 447.26ms. Allocated memory is still 217.1MB. Free memory was 157.1MB in the beginning and 140.9MB in the end (delta: 16.2MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. * TraceAbstraction took 1569.58ms. Allocated memory is still 217.1MB. Free memory was 139.9MB in the beginning and 153.3MB in the end (delta: -13.4MB). 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