/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/recursive-simple/fibo_2calls_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 06:05:58,463 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 06:05:58,478 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 06:05:58,565 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 06:05:58,566 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 06:05:58,568 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 06:05:58,572 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 06:05:58,574 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 06:05:58,575 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 06:05:58,585 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 06:05:58,587 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 06:05:58,589 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 06:05:58,589 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 06:05:58,592 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 06:05:58,593 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 06:05:58,594 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 06:05:58,595 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 06:05:58,596 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 06:05:58,602 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 06:05:58,612 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 06:05:58,613 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 06:05:58,615 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 06:05:58,615 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 06:05:58,617 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 06:05:58,629 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 06:05:58,629 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 06:05:58,630 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 06:05:58,631 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 06:05:58,631 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 06:05:58,632 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 06:05:58,632 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 06:05:58,633 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 06:05:58,634 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 06:05:58,634 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 06:05:58,635 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 06:05:58,635 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 06:05:58,635 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 06:05:58,636 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 06:05:58,636 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 06:05:58,636 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 06:05:58,637 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 06:05:58,638 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 06:05:58,675 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 06:05:58,676 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 06:05:58,676 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 06:05:58,676 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 06:05:58,677 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 06:05:58,677 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 06:05:58,678 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 06:05:58,678 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 06:05:58,678 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 06:05:58,678 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 06:05:58,679 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 06:05:58,679 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 06:05:58,679 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 06:05:58,679 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 06:05:58,680 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 06:05:58,680 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 06:05:58,680 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 06:05:58,680 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 06:05:58,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 06:05:58,681 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 06:05:58,681 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 06:05:58,681 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 06:05:58,681 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 06:05:58,681 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 06:05:58,682 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 06:05:58,682 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 06:05:58,682 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 06:05:58,682 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 06:05:58,682 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 06:05:58,682 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 06:05:58,683 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 06:05:58,683 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 06:05:58,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:05:58,683 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 06:05:58,683 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 06:05:58,684 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 06:05:58,684 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 06:05:58,684 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 06:05:58,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 06:05:58,684 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 06:05:58,684 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 06:05:58,684 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 06:05:59,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 06:05:59,212 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 06:05:59,227 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 06:05:59,228 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 06:05:59,228 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 06:05:59,229 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.c [2023-04-01 06:06:01,664 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 06:06:02,120 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 06:06:02,134 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.c [2023-04-01 06:06:02,164 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a70c3f09/1bd06a30827140fb8039f2169f685e74/FLAGf67c9dc89 [2023-04-01 06:06:02,292 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a70c3f09/1bd06a30827140fb8039f2169f685e74 [2023-04-01 06:06:02,299 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 06:06:02,300 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 06:06:02,308 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 06:06:02,308 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 06:06:02,311 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 06:06:02,317 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:06:02" (1/1) ... [2023-04-01 06:06:02,319 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1272a60a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:06:02, skipping insertion in model container [2023-04-01 06:06:02,319 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:06:02" (1/1) ... [2023-04-01 06:06:02,339 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 06:06:02,362 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 06:06:02,726 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/recursive-simple/fibo_2calls_2-2.c[946,959] [2023-04-01 06:06:02,743 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:06:02,784 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 06:06:02,838 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/recursive-simple/fibo_2calls_2-2.c[946,959] [2023-04-01 06:06:02,841 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:06:02,879 INFO L208 MainTranslator]: Completed translation [2023-04-01 06:06:02,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:06:02 WrapperNode [2023-04-01 06:06:02,880 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 06:06:02,885 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 06:06:02,885 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 06:06:02,885 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 06:06:02,934 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:06:02" (1/1) ... [2023-04-01 06:06:02,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:06:02" (1/1) ... [2023-04-01 06:06:02,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:06:02" (1/1) ... [2023-04-01 06:06:02,967 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:06:02" (1/1) ... [2023-04-01 06:06:02,998 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:06:02" (1/1) ... [2023-04-01 06:06:03,006 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:06:02" (1/1) ... [2023-04-01 06:06:03,007 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:06:02" (1/1) ... [2023-04-01 06:06:03,007 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:06:02" (1/1) ... [2023-04-01 06:06:03,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 06:06:03,009 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 06:06:03,010 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 06:06:03,010 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 06:06:03,017 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:06:02" (1/1) ... [2023-04-01 06:06:03,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:06:03,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:06:03,143 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 06:06:03,198 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 06:06:03,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 06:06:03,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 06:06:03,256 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 06:06:03,258 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2023-04-01 06:06:03,259 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2023-04-01 06:06:03,259 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 06:06:03,259 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 06:06:03,259 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 06:06:03,259 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 06:06:03,259 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 06:06:03,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 06:06:03,273 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2023-04-01 06:06:03,273 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2023-04-01 06:06:03,273 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 06:06:03,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 06:06:03,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 06:06:03,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 06:06:03,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 06:06:03,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 06:06:03,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 06:06:03,387 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 06:06:03,401 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 06:06:03,610 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 06:06:03,653 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 06:06:03,654 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 06:06:03,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:06:03 BoogieIcfgContainer [2023-04-01 06:06:03,656 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 06:06:03,675 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 06:06:03,675 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 06:06:03,711 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 06:06:03,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:06:02" (1/3) ... [2023-04-01 06:06:03,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@668ef38c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:06:03, skipping insertion in model container [2023-04-01 06:06:03,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:06:02" (2/3) ... [2023-04-01 06:06:03,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@668ef38c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:06:03, skipping insertion in model container [2023-04-01 06:06:03,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:06:03" (3/3) ... [2023-04-01 06:06:03,714 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-2.c [2023-04-01 06:06:03,762 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 06:06:03,763 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 06:06:03,885 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 06:06:03,891 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;@1e668f12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 06:06:03,891 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 06:06:03,921 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 06:06:03,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-01 06:06:03,935 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:06:03,935 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:06:03,936 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:06:03,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:06:03,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1638346757, now seen corresponding path program 1 times [2023-04-01 06:06:03,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:06:03,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597314862] [2023-04-01 06:06:03,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:06:03,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:06:04,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:06:04,625 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 06:06:04,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:06:04,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597314862] [2023-04-01 06:06:04,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597314862] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:06:04,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:06:04,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:06:04,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054655073] [2023-04-01 06:06:04,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:06:04,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:06:04,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:06:04,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:06:04,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:06:04,744 INFO L87 Difference]: Start difference. First operand has 32 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 1 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 06:06:05,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:06:05,040 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2023-04-01 06:06:05,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:06:05,051 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 13 [2023-04-01 06:06:05,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:06:05,082 INFO L225 Difference]: With dead ends: 42 [2023-04-01 06:06:05,082 INFO L226 Difference]: Without dead ends: 30 [2023-04-01 06:06:05,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 06:06:05,115 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 13 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:06:05,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 89 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:06:05,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-01 06:06:05,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-04-01 06:06:05,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-04-01 06:06:05,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2023-04-01 06:06:05,267 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2023-04-01 06:06:05,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:06:05,273 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2023-04-01 06:06:05,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 1 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 06:06:05,274 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2023-04-01 06:06:05,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 06:06:05,282 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:06:05,282 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:06:05,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 06:06:05,283 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:06:05,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:06:05,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1791010960, now seen corresponding path program 1 times [2023-04-01 06:06:05,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:06:05,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148450884] [2023-04-01 06:06:05,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:06:05,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:06:05,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:06:05,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 06:06:05,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:06:05,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148450884] [2023-04-01 06:06:05,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148450884] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:06:05,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325617942] [2023-04-01 06:06:05,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:06:05,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:06:05,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:06:05,995 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 06:06:05,996 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 06:06:06,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:06:06,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 06:06:06,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:06:06,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 06:06:06,208 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 06:06:06,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 06:06:06,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325617942] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 06:06:06,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [488392738] [2023-04-01 06:06:06,604 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-04-01 06:06:06,605 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 06:06:06,607 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 06:06:06,611 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 06:06:06,612 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 06:06:06,701 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 06:06:06,753 INFO L197 IcfgInterpreter]: Interpreting procedure fibo1 with input of size 12 for LOIs [2023-04-01 06:06:06,773 INFO L197 IcfgInterpreter]: Interpreting procedure fibo2 with input of size 11 for LOIs [2023-04-01 06:06:06,781 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 06:06:06,793 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 06:06:06,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [488392738] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:06:06,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 06:06:06,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 7, 7] total 21 [2023-04-01 06:06:06,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950012857] [2023-04-01 06:06:06,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:06:06,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 06:06:06,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:06:06,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 06:06:06,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2023-04-01 06:06:06,973 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 10 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 06:06:07,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:06:07,664 INFO L93 Difference]: Finished difference Result 68 states and 87 transitions. [2023-04-01 06:06:07,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 06:06:07,665 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 26 [2023-04-01 06:06:07,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:06:07,666 INFO L225 Difference]: With dead ends: 68 [2023-04-01 06:06:07,666 INFO L226 Difference]: Without dead ends: 44 [2023-04-01 06:06:07,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2023-04-01 06:06:07,668 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 77 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 06:06:07,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 6 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 06:06:07,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-04-01 06:06:07,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2023-04-01 06:06:07,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 06:06:07,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2023-04-01 06:06:07,707 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 26 [2023-04-01 06:06:07,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:06:07,707 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2023-04-01 06:06:07,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 06:06:07,708 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2023-04-01 06:06:07,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 06:06:07,709 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:06:07,709 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:06:07,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 06:06:07,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:06:07,917 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:06:07,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:06:07,918 INFO L85 PathProgramCache]: Analyzing trace with hash 621811368, now seen corresponding path program 1 times [2023-04-01 06:06:07,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:06:07,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061460410] [2023-04-01 06:06:07,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:06:07,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:06:07,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:06:08,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 06:06:08,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:06:08,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061460410] [2023-04-01 06:06:08,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061460410] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:06:08,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164225176] [2023-04-01 06:06:08,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:06:08,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:06:08,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:06:08,095 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 06:06:08,098 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 06:06:08,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:06:08,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-01 06:06:08,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:06:08,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 06:06:08,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 06:06:08,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 06:06:08,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164225176] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 06:06:08,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1042671670] [2023-04-01 06:06:08,387 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-01 06:06:08,387 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 06:06:08,387 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 06:06:08,388 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 06:06:08,388 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 06:06:08,433 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 06:06:08,673 INFO L197 IcfgInterpreter]: Interpreting procedure fibo1 with input of size 12 for LOIs [2023-04-01 06:06:09,137 INFO L197 IcfgInterpreter]: Interpreting procedure fibo2 with input of size 14 for LOIs [2023-04-01 06:06:09,267 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 06:06:09,306 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 06:06:10,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1042671670] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:06:10,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 06:06:10,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [9, 9, 9] total 25 [2023-04-01 06:06:10,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788327642] [2023-04-01 06:06:10,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:06:10,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 06:06:10,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:06:10,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 06:06:10,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2023-04-01 06:06:10,175 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 17 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 10 states have internal predecessors, (16), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 06:06:12,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:06:12,280 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2023-04-01 06:06:12,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 06:06:12,281 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 10 states have internal predecessors, (16), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 27 [2023-04-01 06:06:12,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:06:12,281 INFO L225 Difference]: With dead ends: 54 [2023-04-01 06:06:12,282 INFO L226 Difference]: Without dead ends: 0 [2023-04-01 06:06:12,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 60 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=225, Invalid=1257, Unknown=0, NotChecked=0, Total=1482 [2023-04-01 06:06:12,283 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 32 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 06:06:12,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 5 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 06:06:12,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-04-01 06:06:12,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-04-01 06:06:12,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-04-01 06:06:12,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-04-01 06:06:12,288 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2023-04-01 06:06:12,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:06:12,288 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-04-01 06:06:12,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 10 states have internal predecessors, (16), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 06:06:12,289 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-04-01 06:06:12,289 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-04-01 06:06:12,291 INFO L805 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 06:06:12,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 06:06:12,497 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,SelfDestructingSolverStorable2 [2023-04-01 06:06:12,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-04-01 06:06:13,279 INFO L899 garLoopResultBuilder]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2023-04-01 06:06:13,279 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line 4) no Hoare annotation was computed. [2023-04-01 06:06:13,279 INFO L899 garLoopResultBuilder]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 41) no Hoare annotation was computed. [2023-04-01 06:06:13,279 INFO L899 garLoopResultBuilder]: For program point mainEXIT(lines 37 44) no Hoare annotation was computed. [2023-04-01 06:06:13,279 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 37 44) the Hoare annotation is: true [2023-04-01 06:06:13,280 INFO L899 garLoopResultBuilder]: For program point L41(line 41) no Hoare annotation was computed. [2023-04-01 06:06:13,280 INFO L899 garLoopResultBuilder]: For program point L40(lines 40 42) no Hoare annotation was computed. [2023-04-01 06:06:13,280 INFO L895 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (or (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (not (= (select |#valid| 3) 1)) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (not (= 18 (select |#length| 2))) (not (= |#NULL.base| 0)) (not (= (select |#valid| 2) 1)) (= main_~x~0 2) (<= |#StackHeapBarrier| 0))) [2023-04-01 06:06:13,280 INFO L899 garLoopResultBuilder]: For program point L39-1(line 39) no Hoare annotation was computed. [2023-04-01 06:06:13,280 INFO L899 garLoopResultBuilder]: For program point L40-2(lines 40 42) no Hoare annotation was computed. [2023-04-01 06:06:13,280 INFO L895 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (or (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (not (= (select |#valid| 3) 1)) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (and (not (= |fibo2_#in~n| 1)) (not (= |fibo2_#in~n| 0))) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (not (= 18 (select |#length| 2))) (not (= |#NULL.base| 0)) (not (= (select |#valid| 2) 1)) (<= |#StackHeapBarrier| 0))) [2023-04-01 06:06:13,286 INFO L899 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2023-04-01 06:06:13,286 INFO L895 garLoopResultBuilder]: At program point L25-2(line 25) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (or (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (not (= (select |#valid| 3) 1)) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (and (not (= |fibo2_#in~n| 1)) (not (= |fibo2_#in~n| 0))) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (not (= 18 (select |#length| 2))) (not (= |#NULL.base| 0)) (not (= (select |#valid| 2) 1)) (<= |#StackHeapBarrier| 0))) [2023-04-01 06:06:13,286 INFO L899 garLoopResultBuilder]: For program point L22(lines 22 26) no Hoare annotation was computed. [2023-04-01 06:06:13,286 INFO L899 garLoopResultBuilder]: For program point L25-3(line 25) no Hoare annotation was computed. [2023-04-01 06:06:13,286 INFO L899 garLoopResultBuilder]: For program point L20(lines 20 26) no Hoare annotation was computed. [2023-04-01 06:06:13,287 INFO L899 garLoopResultBuilder]: For program point fibo2FINAL(lines 19 27) no Hoare annotation was computed. [2023-04-01 06:06:13,287 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 19 27) the Hoare annotation is: true [2023-04-01 06:06:13,287 INFO L899 garLoopResultBuilder]: For program point fibo2EXIT(lines 19 27) no Hoare annotation was computed. [2023-04-01 06:06:13,287 INFO L895 garLoopResultBuilder]: At program point L15(line 15) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (or (not (= 2 |fibo1_#in~n|)) (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (not (= (select |#valid| 3) 1)) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (not (= 18 (select |#length| 2))) (not (= |#NULL.base| 0)) (= fibo1_~n 2) (not (= (select |#valid| 2) 1)) (<= |#StackHeapBarrier| 0))) [2023-04-01 06:06:13,287 INFO L899 garLoopResultBuilder]: For program point L15-1(line 15) no Hoare annotation was computed. [2023-04-01 06:06:13,287 INFO L895 garLoopResultBuilder]: At program point L15-2(line 15) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (or (not (= 2 |fibo1_#in~n|)) (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (and (= |fibo1_#t~ret4| 1) (= fibo1_~n 2)) (not (= 2 (select |#length| 1))) (not (= (select |#valid| 3) 1)) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (not (= 18 (select |#length| 2))) (not (= |#NULL.base| 0)) (not (= (select |#valid| 2) 1)) (<= |#StackHeapBarrier| 0))) [2023-04-01 06:06:13,287 INFO L899 garLoopResultBuilder]: For program point L12(lines 12 16) no Hoare annotation was computed. [2023-04-01 06:06:13,287 INFO L899 garLoopResultBuilder]: For program point L15-3(line 15) no Hoare annotation was computed. [2023-04-01 06:06:13,287 INFO L899 garLoopResultBuilder]: For program point fibo1FINAL(lines 9 17) no Hoare annotation was computed. [2023-04-01 06:06:13,288 INFO L899 garLoopResultBuilder]: For program point L10(lines 10 16) no Hoare annotation was computed. [2023-04-01 06:06:13,288 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 9 17) the Hoare annotation is: true [2023-04-01 06:06:13,288 INFO L899 garLoopResultBuilder]: For program point fibo1EXIT(lines 9 17) no Hoare annotation was computed. [2023-04-01 06:06:13,288 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2023-04-01 06:06:13,288 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2023-04-01 06:06:13,288 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-04-01 06:06:13,288 INFO L895 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (and (= (select |#length| 3) 12) (= 18 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select .cse0 0) 48) (= (select .cse0 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2023-04-01 06:06:13,288 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-04-01 06:06:13,288 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-04-01 06:06:13,291 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-04-01 06:06:13,295 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-01 06:06:13,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.04 06:06:13 BoogieIcfgContainer [2023-04-01 06:06:13,316 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-01 06:06:13,317 INFO L158 Benchmark]: Toolchain (without parser) took 11016.54ms. Allocated memory was 330.3MB in the beginning and 429.9MB in the end (delta: 99.6MB). Free memory was 280.3MB in the beginning and 259.8MB in the end (delta: 20.5MB). Peak memory consumption was 121.0MB. Max. memory is 8.0GB. [2023-04-01 06:06:13,317 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 181.4MB. Free memory is still 129.3MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 06:06:13,319 INFO L158 Benchmark]: CACSL2BoogieTranslator took 572.20ms. Allocated memory is still 330.3MB. Free memory was 280.3MB in the beginning and 270.2MB in the end (delta: 10.1MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2023-04-01 06:06:13,319 INFO L158 Benchmark]: Boogie Preprocessor took 123.89ms. Allocated memory is still 330.3MB. Free memory was 270.2MB in the beginning and 268.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-04-01 06:06:13,319 INFO L158 Benchmark]: RCFGBuilder took 646.39ms. Allocated memory is still 330.3MB. Free memory was 268.8MB in the beginning and 257.6MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-01 06:06:13,319 INFO L158 Benchmark]: TraceAbstraction took 9641.29ms. Allocated memory was 330.3MB in the beginning and 429.9MB in the end (delta: 99.6MB). Free memory was 256.9MB in the beginning and 259.8MB in the end (delta: -2.9MB). Peak memory consumption was 98.0MB. Max. memory is 8.0GB. [2023-04-01 06:06:13,321 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 181.4MB. Free memory is still 129.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 572.20ms. Allocated memory is still 330.3MB. Free memory was 280.3MB in the beginning and 270.2MB in the end (delta: 10.1MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 123.89ms. Allocated memory is still 330.3MB. Free memory was 270.2MB in the beginning and 268.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 646.39ms. Allocated memory is still 330.3MB. Free memory was 268.8MB in the beginning and 257.6MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 9641.29ms. Allocated memory was 330.3MB in the beginning and 429.9MB in the end (delta: 99.6MB). Free memory was 256.9MB in the beginning and 259.8MB in the end (delta: -2.9MB). Peak memory consumption was 98.0MB. 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 - PositiveResult [Line: 41]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 9.4s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 125 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 122 mSDsluCounter, 100 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 65 mSDsCounter, 53 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 349 IncrementalHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 53 mSolverCounterUnsat, 35 mSDtfsCounter, 349 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 200 GetRequests, 125 SyntacticMatches, 9 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=2, InterpolantAutomatonStates: 33, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 38 PreInvPairs, 39 NumberOfFragments, 459 HoareAnnotationTreeSize, 38 FomulaSimplifications, 21 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 903 FormulaSimplificationTreeSizeReductionInter, 0.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 119 NumberOfCodeBlocks, 119 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 165 ConstructedInterpolants, 0 QuantifiedInterpolants, 422 SizeOfPredicates, 3 NumberOfNonLiveVariables, 176 ConjunctsInSsa, 21 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 9/24 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 1.1s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 10, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 47, DAG_INTERPRETER_EARLY_EXITS: 7, TOOLS_POST_APPLICATIONS: 42, TOOLS_POST_TIME: 0.1s, TOOLS_POST_CALL_APPLICATIONS: 29, TOOLS_POST_CALL_TIME: 0.2s, TOOLS_POST_RETURN_APPLICATIONS: 20, TOOLS_POST_RETURN_TIME: 0.2s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 90, TOOLS_QUANTIFIERELIM_TIME: 0.5s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 126, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 17, DOMAIN_JOIN_TIME: 0.2s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 47, DOMAIN_ISBOTTOM_TIME: 0.3s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 20, CALL_SUMMARIZER_CACHE_MISSES: 6, CALL_SUMMARIZER_OVERALL_TIME: 0.1s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.1s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 345, DAG_COMPRESSION_RETAINED_NODES: 145, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-04-01 06:06:13,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...