/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 IntervalDomain -i ../sv-benchmarks/c/array-fpi/brs3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 20:58:47,668 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 20:58:47,670 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 20:58:47,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 20:58:47,705 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 20:58:47,708 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 20:58:47,711 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 20:58:47,714 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 20:58:47,715 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 20:58:47,721 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 20:58:47,723 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 20:58:47,724 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 20:58:47,725 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 20:58:47,733 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 20:58:47,734 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 20:58:47,737 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 20:58:47,738 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 20:58:47,739 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 20:58:47,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 20:58:47,741 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 20:58:47,742 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 20:58:47,744 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 20:58:47,744 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 20:58:47,745 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 20:58:47,753 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 20:58:47,756 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 20:58:47,757 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 20:58:47,757 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 20:58:47,758 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 20:58:47,758 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 20:58:47,758 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 20:58:47,759 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 20:58:47,759 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 20:58:47,759 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 20:58:47,760 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 20:58:47,760 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 20:58:47,761 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 [2023-03-31 20:58:47,793 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 20:58:47,793 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 20:58:47,793 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 20:58:47,793 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 20:58:47,794 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 20:58:47,794 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 20:58:47,794 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 20:58:47,795 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 20:58:47,795 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 20:58:47,795 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 20:58:47,795 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 20:58:47,796 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 20:58:47,796 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 20:58:47,796 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 20:58:47,796 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 20:58:47,796 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 20:58:47,796 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 20:58:47,796 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 20:58:47,797 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 20:58:47,797 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 20:58:47,797 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 20:58:47,797 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 20:58:47,797 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 20:58:47,798 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 20:58:47,798 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 20:58:47,798 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 20:58:47,798 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 20:58:47,798 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 20:58:47,798 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 20:58:47,798 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 20:58:47,798 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 20:58:47,799 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 20:58:47,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:58:47,799 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 20:58:47,799 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 20:58:47,799 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 20:58:47,799 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 20:58:47,799 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 20:58:47,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 20:58:47,800 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 20:58:47,800 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 20:58:47,800 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 20:58:48,022 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 20:58:48,046 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 20:58:48,048 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 20:58:48,049 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 20:58:48,049 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 20:58:48,051 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/brs3.c [2023-03-31 20:58:49,163 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 20:58:49,362 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 20:58:49,362 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/brs3.c [2023-03-31 20:58:49,367 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ec7b3765/ba3672c2dde34f10b75334ec3f1fd280/FLAG1c79c57f2 [2023-03-31 20:58:49,380 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ec7b3765/ba3672c2dde34f10b75334ec3f1fd280 [2023-03-31 20:58:49,384 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 20:58:49,385 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 20:58:49,386 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 20:58:49,386 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 20:58:49,391 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 20:58:49,392 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:58:49" (1/1) ... [2023-03-31 20:58:49,393 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@631d539a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:58:49, skipping insertion in model container [2023-03-31 20:58:49,393 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:58:49" (1/1) ... [2023-03-31 20:58:49,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 20:58:49,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 20:58:49,539 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/brs3.c[587,600] [2023-03-31 20:58:49,553 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:58:49,561 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 20:58:49,570 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/brs3.c[587,600] [2023-03-31 20:58:49,576 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:58:49,588 INFO L208 MainTranslator]: Completed translation [2023-03-31 20:58:49,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:58:49 WrapperNode [2023-03-31 20:58:49,589 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 20:58:49,589 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 20:58:49,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 20:58:49,590 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 20:58:49,597 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:58:49" (1/1) ... [2023-03-31 20:58:49,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:58:49" (1/1) ... [2023-03-31 20:58:49,604 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:58:49" (1/1) ... [2023-03-31 20:58:49,605 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:58:49" (1/1) ... [2023-03-31 20:58:49,611 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:58:49" (1/1) ... [2023-03-31 20:58:49,618 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:58:49" (1/1) ... [2023-03-31 20:58:49,619 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:58:49" (1/1) ... [2023-03-31 20:58:49,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:58:49" (1/1) ... [2023-03-31 20:58:49,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 20:58:49,623 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 20:58:49,623 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 20:58:49,623 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 20:58:49,624 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:58:49" (1/1) ... [2023-03-31 20:58:49,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:58:49,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:58:49,653 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) [2023-03-31 20:58:49,655 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 [2023-03-31 20:58:49,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 20:58:49,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 20:58:49,683 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 20:58:49,683 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 20:58:49,683 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 20:58:49,683 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 20:58:49,683 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 20:58:49,683 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 20:58:49,684 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 20:58:49,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 20:58:49,684 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 20:58:49,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 20:58:49,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 20:58:49,684 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-31 20:58:49,684 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 20:58:49,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 20:58:49,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-31 20:58:49,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 20:58:49,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 20:58:49,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 20:58:49,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 20:58:49,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 20:58:49,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 20:58:49,763 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 20:58:49,765 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 20:58:49,923 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 20:58:50,002 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 20:58:50,003 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-03-31 20:58:50,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:58:50 BoogieIcfgContainer [2023-03-31 20:58:50,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 20:58:50,011 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 20:58:50,011 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 20:58:50,014 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 20:58:50,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 08:58:49" (1/3) ... [2023-03-31 20:58:50,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5257f7ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:58:50, skipping insertion in model container [2023-03-31 20:58:50,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:58:49" (2/3) ... [2023-03-31 20:58:50,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5257f7ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:58:50, skipping insertion in model container [2023-03-31 20:58:50,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:58:50" (3/3) ... [2023-03-31 20:58:50,017 INFO L112 eAbstractionObserver]: Analyzing ICFG brs3.c [2023-03-31 20:58:50,033 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 20:58:50,034 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 20:58:50,106 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 20:58:50,112 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;@44da8be3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 20:58:50,113 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 20:58:50,118 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 20:58:50,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-03-31 20:58:50,123 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:58:50,124 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:58:50,124 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:58:50,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:58:50,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1699617010, now seen corresponding path program 1 times [2023-03-31 20:58:50,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:58:50,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813055213] [2023-03-31 20:58:50,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:58:50,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:58:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:58:50,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:58:50,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:58:50,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813055213] [2023-03-31 20:58:50,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813055213] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:58:50,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:58:50,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 20:58:50,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639534976] [2023-03-31 20:58:50,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:58:50,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 20:58:50,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:58:50,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 20:58:50,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-03-31 20:58:50,576 INFO L87 Difference]: Start difference. First operand has 24 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 20:58:50,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:58:50,633 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2023-03-31 20:58:50,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 20:58:50,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-03-31 20:58:50,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:58:50,646 INFO L225 Difference]: With dead ends: 43 [2023-03-31 20:58:50,647 INFO L226 Difference]: Without dead ends: 19 [2023-03-31 20:58:50,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-03-31 20:58:50,655 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 18 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:58:50,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 42 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:58:50,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-03-31 20:58:50,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-03-31 20:58:50,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 20:58:50,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2023-03-31 20:58:50,683 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2023-03-31 20:58:50,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:58:50,684 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2023-03-31 20:58:50,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 20:58:50,684 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2023-03-31 20:58:50,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-03-31 20:58:50,685 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:58:50,685 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:58:50,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 20:58:50,685 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:58:50,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:58:50,686 INFO L85 PathProgramCache]: Analyzing trace with hash -29676778, now seen corresponding path program 1 times [2023-03-31 20:58:50,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:58:50,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955791336] [2023-03-31 20:58:50,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:58:50,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:58:50,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:58:51,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 20:58:51,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:58:51,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955791336] [2023-03-31 20:58:51,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955791336] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:58:51,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791811349] [2023-03-31 20:58:51,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:58:51,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:58:51,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:58:51,153 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) [2023-03-31 20:58:51,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 20:58:51,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:58:51,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2023-03-31 20:58:51,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:58:51,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 20:58:51,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-03-31 20:58:51,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 20:58:51,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:58:51,581 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 20:58:51,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 51 [2023-03-31 20:58:51,605 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 20:58:51,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 8 [2023-03-31 20:58:51,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-03-31 20:58:51,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-03-31 20:58:51,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 20:58:51,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791811349] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:58:51,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [797110823] [2023-03-31 20:58:51,757 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-03-31 20:58:51,757 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:58:51,760 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:58:51,765 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:58:51,765 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:58:51,858 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-03-31 20:58:52,010 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-03-31 20:58:52,027 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-03-31 20:58:52,032 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 20:58:52,044 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:58:52,640 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '241#(and (<= 0 ~N~0) (<= ~N~0 2147483647) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_1| Int)) (and (< (* 3 ~N~0) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_1|) 0)) (<= 0 |v_main_~#sum~0.base_BEFORE_CALL_1|))) (= |#NULL.base| 0))' at error location [2023-03-31 20:58:52,640 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:58:52,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:58:52,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-03-31 20:58:52,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643822325] [2023-03-31 20:58:52,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:58:52,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-03-31 20:58:52,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:58:52,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-03-31 20:58:52,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2023-03-31 20:58:52,644 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-31 20:58:52,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:58:52,809 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2023-03-31 20:58:52,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 20:58:52,809 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 18 [2023-03-31 20:58:52,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:58:52,810 INFO L225 Difference]: With dead ends: 25 [2023-03-31 20:58:52,810 INFO L226 Difference]: Without dead ends: 20 [2023-03-31 20:58:52,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2023-03-31 20:58:52,812 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 13 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:58:52,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 61 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:58:52,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-03-31 20:58:52,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-03-31 20:58:52,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 20:58:52,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-03-31 20:58:52,816 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2023-03-31 20:58:52,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:58:52,816 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-03-31 20:58:52,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-31 20:58:52,816 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-03-31 20:58:52,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-03-31 20:58:52,817 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:58:52,817 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:58:52,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 20:58:53,034 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 [2023-03-31 20:58:53,035 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:58:53,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:58:53,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1048888652, now seen corresponding path program 2 times [2023-03-31 20:58:53,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:58:53,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661420822] [2023-03-31 20:58:53,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:58:53,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:58:53,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:58:53,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:58:53,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:58:53,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661420822] [2023-03-31 20:58:53,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661420822] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:58:53,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183282446] [2023-03-31 20:58:53,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:58:53,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:58:53,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:58:53,132 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) [2023-03-31 20:58:53,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 20:58:53,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-03-31 20:58:53,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:58:53,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 20:58:53,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:58:53,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:58:53,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:58:53,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:58:53,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183282446] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:58:53,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2097550661] [2023-03-31 20:58:53,283 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-03-31 20:58:53,283 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:58:53,283 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:58:53,283 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:58:53,283 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:58:53,322 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-03-31 20:58:53,413 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-03-31 20:58:53,441 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-03-31 20:58:53,445 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 20:58:53,453 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:58:53,890 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '455#(and (<= 0 ~N~0) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_2| Int)) (and (<= 0 |v_main_~#sum~0.base_BEFORE_CALL_2|) (< (* 3 ~N~0) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_2|) 0)))) (<= ~N~0 2147483647) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:58:53,891 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:58:53,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:58:53,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-03-31 20:58:53,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466239789] [2023-03-31 20:58:53,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:58:53,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-03-31 20:58:53,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:58:53,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-03-31 20:58:53,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2023-03-31 20:58:53,893 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 20:58:53,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:58:53,933 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2023-03-31 20:58:53,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 20:58:53,937 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-03-31 20:58:53,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:58:53,937 INFO L225 Difference]: With dead ends: 29 [2023-03-31 20:58:53,937 INFO L226 Difference]: Without dead ends: 21 [2023-03-31 20:58:53,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2023-03-31 20:58:53,939 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:58:53,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:58:53,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-03-31 20:58:53,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-03-31 20:58:53,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 20:58:53,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2023-03-31 20:58:53,943 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2023-03-31 20:58:53,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:58:53,943 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2023-03-31 20:58:53,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 20:58:53,943 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2023-03-31 20:58:53,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-03-31 20:58:53,944 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:58:53,944 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:58:53,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-31 20:58:54,150 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 [2023-03-31 20:58:54,150 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:58:54,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:58:54,150 INFO L85 PathProgramCache]: Analyzing trace with hash -97344014, now seen corresponding path program 3 times [2023-03-31 20:58:54,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:58:54,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567554491] [2023-03-31 20:58:54,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:58:54,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:58:54,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:58:54,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:58:54,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:58:54,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567554491] [2023-03-31 20:58:54,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567554491] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:58:54,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778335333] [2023-03-31 20:58:54,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 20:58:54,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:58:54,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:58:54,821 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:58:54,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 20:58:54,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 20:58:54,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:58:54,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 32 conjunts are in the unsatisfiable core [2023-03-31 20:58:54,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:58:54,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 51 [2023-03-31 20:58:54,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2023-03-31 20:58:54,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-03-31 20:58:54,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-03-31 20:58:55,105 INFO L321 Elim1Store]: treesize reduction 48, result has 54.3 percent of original size [2023-03-31 20:58:55,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 93 [2023-03-31 20:58:55,451 INFO L321 Elim1Store]: treesize reduction 86, result has 56.6 percent of original size [2023-03-31 20:58:55,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 73 treesize of output 154 [2023-03-31 20:59:35,284 WARN L223 SmtUtils]: Spent 38.58s on a formula simplification. DAG size of input: 170 DAG size of output: 104 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-03-31 20:59:36,557 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 20:59:36,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 252 treesize of output 1201