/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/float-benchs/inv_Newton.c.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:44:12,886 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:44:12,888 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:44:12,911 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:44:12,912 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:44:12,914 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:44:12,917 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:44:12,921 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:44:12,923 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:44:12,926 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:44:12,927 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:44:12,929 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:44:12,929 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:44:12,932 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:44:12,934 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:44:12,936 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:44:12,936 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:44:12,937 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:44:12,939 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:44:12,943 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:44:12,945 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:44:12,946 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:44:12,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:44:12,948 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:44:12,955 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 04:44:12,958 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:44:12,959 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:44:12,960 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:44:12,961 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:44:12,962 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:44:12,962 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:44:12,962 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:44:12,962 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:44:12,962 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:44:12,963 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:44:12,964 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:44:12,965 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 04:44:13,000 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:44:13,000 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:44:13,000 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:44:13,001 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:44:13,001 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:44:13,001 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:44:13,002 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:44:13,002 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:44:13,002 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:44:13,002 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:44:13,003 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:44:13,003 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:44:13,003 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:44:13,003 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:44:13,003 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:44:13,003 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:44:13,003 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:44:13,004 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:44:13,004 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:44:13,004 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:44:13,004 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:44:13,005 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:44:13,005 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:44:13,005 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:44:13,005 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:44:13,005 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:44:13,005 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:44:13,005 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:44:13,005 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:44:13,005 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:44:13,006 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:44:13,006 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:44:13,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:44:13,006 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:44:13,006 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:44:13,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:44:13,006 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:44:13,007 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:44:13,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:44:13,007 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:44:13,007 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:44:13,007 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:44:13,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:44:13,261 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:44:13,263 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:44:13,264 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:44:13,265 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:44:13,265 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/inv_Newton.c.p+cfa-reducer.c [2023-04-01 04:44:14,299 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:44:14,485 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:44:14,485 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/inv_Newton.c.p+cfa-reducer.c [2023-04-01 04:44:14,491 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81307225e/f311c79935404090a93d0eaeb8309a40/FLAGd58537d7a [2023-04-01 04:44:14,511 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81307225e/f311c79935404090a93d0eaeb8309a40 [2023-04-01 04:44:14,513 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:44:14,515 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:44:14,518 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:44:14,518 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:44:14,523 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:44:14,524 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:44:14" (1/1) ... [2023-04-01 04:44:14,525 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a5bef2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:44:14, skipping insertion in model container [2023-04-01 04:44:14,525 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:44:14" (1/1) ... [2023-04-01 04:44:14,532 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:44:14,549 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:44:14,674 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/float-benchs/inv_Newton.c.p+cfa-reducer.c[2006,2019] [2023-04-01 04:44:14,678 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:44:14,688 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:44:14,706 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/float-benchs/inv_Newton.c.p+cfa-reducer.c[2006,2019] [2023-04-01 04:44:14,707 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:44:14,719 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:44:14,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:44:14 WrapperNode [2023-04-01 04:44:14,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:44:14,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:44:14,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:44:14,721 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:44:14,730 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:44:14" (1/1) ... [2023-04-01 04:44:14,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:44:14" (1/1) ... [2023-04-01 04:44:14,738 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:44:14" (1/1) ... [2023-04-01 04:44:14,738 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:44:14" (1/1) ... [2023-04-01 04:44:14,745 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:44:14" (1/1) ... [2023-04-01 04:44:14,747 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:44:14" (1/1) ... [2023-04-01 04:44:14,748 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:44:14" (1/1) ... [2023-04-01 04:44:14,752 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:44:14" (1/1) ... [2023-04-01 04:44:14,765 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:44:14,766 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:44:14,766 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:44:14,766 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:44:14,767 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:44:14" (1/1) ... [2023-04-01 04:44:14,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:44:14,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:44:14,796 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 04:44:14,797 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 04:44:14,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:44:14,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:44:14,823 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:44:14,823 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 04:44:14,823 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:44:14,823 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:44:14,823 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:44:14,823 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:44:14,823 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:44:14,823 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2023-04-01 04:44:14,823 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 04:44:14,824 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 04:44:14,824 INFO L130 BoogieDeclarations]: Found specification of procedure inv [2023-04-01 04:44:14,824 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:44:14,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 04:44:14,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2023-04-01 04:44:14,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:44:14,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:44:14,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-04-01 04:44:14,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:44:14,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:44:14,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:44:14,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:44:14,897 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:44:14,899 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:44:15,125 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:44:15,222 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:44:15,222 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 04:44:15,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:44:15 BoogieIcfgContainer [2023-04-01 04:44:15,228 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:44:15,230 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:44:15,230 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:44:15,232 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:44:15,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:44:14" (1/3) ... [2023-04-01 04:44:15,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@253cb799 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:44:15, skipping insertion in model container [2023-04-01 04:44:15,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:44:14" (2/3) ... [2023-04-01 04:44:15,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@253cb799 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:44:15, skipping insertion in model container [2023-04-01 04:44:15,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:44:15" (3/3) ... [2023-04-01 04:44:15,235 INFO L112 eAbstractionObserver]: Analyzing ICFG inv_Newton.c.p+cfa-reducer.c [2023-04-01 04:44:15,252 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:44:15,252 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:44:15,306 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:44:15,312 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;@6eaf30a9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:44:15,313 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:44:15,316 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:44:15,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 04:44:15,323 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:44:15,324 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:44:15,324 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:44:15,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:44:15,328 INFO L85 PathProgramCache]: Analyzing trace with hash 809448739, now seen corresponding path program 1 times [2023-04-01 04:44:15,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:44:15,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009105782] [2023-04-01 04:44:15,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:44:15,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:44:15,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:44:15,647 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 04:44:15,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:44:15,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009105782] [2023-04-01 04:44:15,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009105782] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:44:15,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:44:15,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 04:44:15,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348711765] [2023-04-01 04:44:15,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:44:15,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 04:44:15,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:44:15,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 04:44:15,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 04:44:15,708 INFO L87 Difference]: Start difference. First operand has 25 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:44:15,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:44:15,788 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2023-04-01 04:44:15,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 04:44:15,790 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-04-01 04:44:15,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:44:15,796 INFO L225 Difference]: With dead ends: 53 [2023-04-01 04:44:15,796 INFO L226 Difference]: Without dead ends: 36 [2023-04-01 04:44:15,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:44:15,805 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 32 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:44:15,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 81 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:44:15,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-04-01 04:44:15,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2023-04-01 04:44:15,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:44:15,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2023-04-01 04:44:15,845 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 14 [2023-04-01 04:44:15,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:44:15,846 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2023-04-01 04:44:15,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:44:15,846 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2023-04-01 04:44:15,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 04:44:15,847 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:44:15,847 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:44:15,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:44:15,847 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:44:15,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:44:15,848 INFO L85 PathProgramCache]: Analyzing trace with hash -532339768, now seen corresponding path program 1 times [2023-04-01 04:44:15,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:44:15,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206635586] [2023-04-01 04:44:15,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:44:15,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:44:15,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:44:15,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:44:15,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:44:15,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206635586] [2023-04-01 04:44:15,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206635586] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:44:15,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:44:15,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:44:15,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448440390] [2023-04-01 04:44:15,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:44:15,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:44:15,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:44:15,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:44:15,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:44:15,966 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:44:16,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:44:16,014 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2023-04-01 04:44:16,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:44:16,014 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-04-01 04:44:16,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:44:16,015 INFO L225 Difference]: With dead ends: 47 [2023-04-01 04:44:16,015 INFO L226 Difference]: Without dead ends: 40 [2023-04-01 04:44:16,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:44:16,017 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 33 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:44:16,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 81 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:44:16,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-04-01 04:44:16,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2023-04-01 04:44:16,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:44:16,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2023-04-01 04:44:16,023 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 18 [2023-04-01 04:44:16,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:44:16,023 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2023-04-01 04:44:16,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:44:16,023 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2023-04-01 04:44:16,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 04:44:16,024 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:44:16,024 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:44:16,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:44:16,024 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:44:16,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:44:16,025 INFO L85 PathProgramCache]: Analyzing trace with hash 13259173, now seen corresponding path program 1 times [2023-04-01 04:44:16,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:44:16,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072747448] [2023-04-01 04:44:16,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:44:16,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:44:16,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:44:16,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 04:44:16,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:44:16,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072747448] [2023-04-01 04:44:16,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072747448] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:44:16,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:44:16,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:44:16,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038268977] [2023-04-01 04:44:16,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:44:16,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:44:16,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:44:16,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:44:16,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:44:16,106 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:44:16,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:44:16,154 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2023-04-01 04:44:16,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:44:16,154 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-04-01 04:44:16,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:44:16,155 INFO L225 Difference]: With dead ends: 44 [2023-04-01 04:44:16,155 INFO L226 Difference]: Without dead ends: 38 [2023-04-01 04:44:16,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:44:16,156 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 20 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:44:16,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 89 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:44:16,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-04-01 04:44:16,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 23. [2023-04-01 04:44:16,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:44:16,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2023-04-01 04:44:16,160 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 18 [2023-04-01 04:44:16,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:44:16,160 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2023-04-01 04:44:16,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:44:16,161 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2023-04-01 04:44:16,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 04:44:16,161 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:44:16,161 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:44:16,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:44:16,162 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:44:16,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:44:16,162 INFO L85 PathProgramCache]: Analyzing trace with hash 28363210, now seen corresponding path program 1 times [2023-04-01 04:44:16,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:44:16,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292900618] [2023-04-01 04:44:16,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:44:16,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:44:16,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 04:44:16,188 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-04-01 04:44:16,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 04:44:16,233 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-04-01 04:44:16,234 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-04-01 04:44:16,235 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 04:44:16,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 04:44:16,239 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-04-01 04:44:16,241 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-01 04:44:16,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.04 04:44:16 BoogieIcfgContainer [2023-04-01 04:44:16,264 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-01 04:44:16,266 INFO L158 Benchmark]: Toolchain (without parser) took 1750.03ms. Allocated memory is still 225.4MB. Free memory was 178.5MB in the beginning and 152.9MB in the end (delta: 25.6MB). Peak memory consumption was 27.0MB. Max. memory is 8.0GB. [2023-04-01 04:44:16,266 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 187.7MB. Free memory is still 137.0MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 04:44:16,267 INFO L158 Benchmark]: CACSL2BoogieTranslator took 201.55ms. Allocated memory is still 225.4MB. Free memory was 178.4MB in the beginning and 167.1MB in the end (delta: 11.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-04-01 04:44:16,267 INFO L158 Benchmark]: Boogie Preprocessor took 44.89ms. Allocated memory is still 225.4MB. Free memory was 167.1MB in the beginning and 165.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-04-01 04:44:16,267 INFO L158 Benchmark]: RCFGBuilder took 461.71ms. Allocated memory is still 225.4MB. Free memory was 165.4MB in the beginning and 148.2MB in the end (delta: 17.2MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. [2023-04-01 04:44:16,268 INFO L158 Benchmark]: TraceAbstraction took 1034.81ms. Allocated memory is still 225.4MB. Free memory was 147.6MB in the beginning and 152.9MB in the end (delta: -5.3MB). There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 04:44:16,269 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 187.7MB. Free memory is still 137.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 201.55ms. Allocated memory is still 225.4MB. Free memory was 178.4MB in the beginning and 167.1MB in the end (delta: 11.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 44.89ms. Allocated memory is still 225.4MB. Free memory was 167.1MB in the beginning and 165.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 461.71ms. Allocated memory is still 225.4MB. Free memory was 165.4MB in the beginning and 148.2MB in the end (delta: 17.2MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. * TraceAbstraction took 1034.81ms. Allocated memory is still 225.4MB. Free memory was 147.6MB in the beginning and 152.9MB in the end (delta: -5.3MB). 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 - UnprovableResult [Line: 96]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseAnd at line 45, overapproximation of someBinaryArithmeticDOUBLEoperation at line 53, overapproximation of someBinaryDOUBLEComparisonOperation at line 83, overapproximation of to_real at line 46. Possible FailurePath: [L1] int __return_main; [L17] double __return_104; [L20] double main__a; [L21] double main__r; [L22] main__a = __VERIFIER_nondet_double() [L23] int main____CPAchecker_TMP_0; VAL [\old(__return_104)=0, __return_104=0, __return_main=0, main__a=2144337923] [L24] COND TRUE main__a >= 20.0 VAL [\old(__return_104)=0, __return_104=0, __return_main=0, main__a=2144337923] [L26] COND TRUE main__a <= 30.0 [L28] main____CPAchecker_TMP_0 = 1 VAL [\old(__return_104)=0, __return_104=0, __return_main=0, main____CPAchecker_TMP_0=1, main__a=2144337923] [L30] COND TRUE main____CPAchecker_TMP_0 != 0 [L33] double __tmp_1; [L34] __tmp_1 = main__a [L35] double inv__A; [L36] inv__A = __tmp_1 [L37] double inv__xi; [L38] double inv__xsi; [L39] double inv__temp; [L40] signed int inv__cond; [L41] signed int inv__exp; [L42] union double_int inv__A_u; [L43] union double_int inv__xi_u; [L44] inv__A_u.d = inv__A [L45] EXPR inv__A_u.i [L45] EXPR (inv__A_u.i) & 2146435072 [L45] inv__exp = ((signed int)(((inv__A_u.i) & 2146435072) >> 20)) - 1023 [L46] inv__xi_u.d = 1 [L47] inv__xi_u.i = (1023 - inv__exp) << 20 [L48] EXPR inv__xi_u.d [L48] inv__xi = inv__xi_u.d [L49] inv__cond = 1 VAL [\old(__return_104)=0, __return_104=0, __return_main=0, __tmp_1=2144337923, inv__A=2144337923, inv__A_u={4:0}, inv__cond=1, inv__exp=1022, inv__xi=2144337922, inv__xi_u={5:0}, main____CPAchecker_TMP_0=1, main__a=2144337923] [L51] COND TRUE !(inv__cond == 0) [L53] inv__xsi = (2 * inv__xi) - ((inv__A * inv__xi) * inv__xi) [L54] inv__temp = inv__xsi - inv__xi [L55] int inv____CPAchecker_TMP_0; VAL [\old(__return_104)=0, __return_104=0, __return_main=0, __tmp_1=2144337923, inv__A=2144337923, inv__A_u={4:0}, inv__cond=1, inv__exp=1022, inv__xi=2144337922, inv__xi_u={5:0}, main____CPAchecker_TMP_0=1, main__a=2144337923] [L56] COND FALSE !(inv__temp > 1.0E-10) VAL [\old(__return_104)=0, __return_104=0, __return_main=0, __tmp_1=2144337923, inv__A=2144337923, inv__A_u={4:0}, inv__cond=1, inv__exp=1022, inv__xi=2144337922, inv__xi_u={5:0}, main____CPAchecker_TMP_0=1, main__a=2144337923] [L67] COND FALSE !(inv__temp < -1.0E-10) [L73] inv____CPAchecker_TMP_0 = 0 VAL [\old(__return_104)=0, __return_104=0, __return_main=0, __tmp_1=2144337923, inv__A=2144337923, inv__A_u={4:0}, inv____CPAchecker_TMP_0=0, inv__cond=1, inv__exp=1022, inv__xi=2144337922, inv__xi_u={5:0}, main____CPAchecker_TMP_0=1, main__a=2144337923] [L61] inv__cond = inv____CPAchecker_TMP_0 [L62] inv__xi = inv__xsi VAL [\old(__return_104)=0, __return_104=0, __return_main=0, __tmp_1=2144337923, inv__A=2144337923, inv__A_u={4:0}, inv____CPAchecker_TMP_0=0, inv__cond=0, inv__exp=1022, inv__xi=2144337921, inv__xi_u={5:0}, inv__xsi=2144337921, main____CPAchecker_TMP_0=1, main__a=2144337923] [L51] COND FALSE !(!(inv__cond == 0)) [L80] __return_104 = inv__xi [L81] main__r = __return_104 [L82] int main____CPAchecker_TMP_1; VAL [\old(__return_104)=0, __return_104=2144337921, __return_main=0, __tmp_1=2144337923, inv__A=2144337923, inv__A_u={4:0}, inv____CPAchecker_TMP_0=0, inv__cond=0, inv__exp=1022, inv__xi=2144337921, inv__xi_u={5:0}, inv__xsi=2144337921, main____CPAchecker_TMP_0=1, main__a=2144337923, main__r=2144337921] [L83] COND FALSE !(main__r >= 0) VAL [\old(__return_104)=0, __return_104=2144337921, __return_main=0, __tmp_1=2144337923, inv__A=2144337923, inv__A_u={4:0}, inv____CPAchecker_TMP_0=0, inv__cond=0, inv__exp=1022, inv__xi=2144337921, inv__xi_u={5:0}, inv__xsi=2144337921, main____CPAchecker_TMP_0=1, main__a=2144337923, main__r=2144337921] [L108] main____CPAchecker_TMP_1 = 0 VAL [\old(__return_104)=0, __return_104=2144337921, __return_main=0, __tmp_1=2144337923, inv__A=2144337923, inv__A_u={4:0}, inv____CPAchecker_TMP_0=0, inv__cond=0, inv__exp=1022, inv__xi=2144337921, inv__xi_u={5:0}, inv__xsi=2144337921, main____CPAchecker_TMP_0=1, main____CPAchecker_TMP_1=0, main__a=2144337923, main__r=2144337921] [L90] int __tmp_2; [L91] __tmp_2 = main____CPAchecker_TMP_1 [L92] int __VERIFIER_assert__cond; [L93] __VERIFIER_assert__cond = __tmp_2 VAL [\old(__return_104)=0, __VERIFIER_assert__cond=0, __return_104=2144337921, __return_main=0, __tmp_1=2144337923, __tmp_2=0, inv__A=2144337923, inv__A_u={4:0}, inv____CPAchecker_TMP_0=0, inv__cond=0, inv__exp=1022, inv__xi=2144337921, inv__xi_u={5:0}, inv__xsi=2144337921, main____CPAchecker_TMP_0=1, main____CPAchecker_TMP_1=0, main__a=2144337923, main__r=2144337921] [L94] COND TRUE __VERIFIER_assert__cond == 0 VAL [\old(__return_104)=0, __VERIFIER_assert__cond=0, __return_104=2144337921, __return_main=0, __tmp_1=2144337923, __tmp_2=0, inv__A=2144337923, inv__A_u={4:0}, inv____CPAchecker_TMP_0=0, inv__cond=0, inv__exp=1022, inv__xi=2144337921, inv__xi_u={5:0}, inv__xsi=2144337921, main____CPAchecker_TMP_0=1, main____CPAchecker_TMP_1=0, main__a=2144337923, main__r=2144337921] [L96] reach_error() VAL [\old(__return_104)=0, __VERIFIER_assert__cond=0, __return_104=2144337921, __return_main=0, __tmp_1=2144337923, __tmp_2=0, inv__A=2144337923, inv__A_u={4:0}, inv____CPAchecker_TMP_0=0, inv__cond=0, inv__exp=1022, inv__xi=2144337921, inv__xi_u={5:0}, inv__xsi=2144337921, main____CPAchecker_TMP_0=1, main____CPAchecker_TMP_1=0, main__a=2144337923, main__r=2144337921] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.9s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 85 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 85 mSDsluCounter, 251 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 173 mSDsCounter, 8 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 50 IncrementalHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8 mSolverCounterUnsat, 78 mSDtfsCounter, 50 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, InterpolantAutomatonStates: 19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 46 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 68 NumberOfCodeBlocks, 68 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 47 ConstructedInterpolants, 0 QuantifiedInterpolants, 68 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 2/2 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: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-04-01 04:44:16,294 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...